Bag-in-carton and pouring spout thereof

A pouring spout 5 is mounted on the front surface of a carton 2. The pouring spout 5 pierces through an inner bag. Only a region which is slightly larger than the half of the inner bag 3 on the pouring spout side is adhered to the inner surfaces of the carton by a paste. As the content is discharged, since the movable portion of the inner bag is injected into the fixed portion fixed on the inner surfaces of the carton, as the content is discharged, the volume of the inner bag is decreased.

TECHNICAL FIELD 
The present invention relates to a bag-in-carton (BIC) composed of a carton 
and an inner bag adhered thereto and to a pouring spout thereof. 
RELATED ART 
BICs have been used as vessels for containing liquid. Normally, a BIC is 
composed of a carton and an inner bag. The carton is formed in a 
rectangularly parallelopiped shape and has an lower surface, a upper 
surface, and four side surfaces, each of which is planar. The inner bag is 
adhered to the inner surfaces of the four side surfaces of the carton. The 
BICs are used for packaging liquid with a low viscosity (for example, 
juice, and liquor). When the content of the BIC is discharged, the same 
amount of air is charged therein. 
In consideration of low cost and security of the BIC, the inventors of the 
present invention studied the feasibility of the BIC for a liquid (such as 
ink) with a high viscosity. However, when a high-viscosity liquid was 
sucked and discharged from a BIC through its pouring spout, air could not 
be smoothly charged therein. Thus, as the content of the BIC was 
discharged, the inner bag should be deformed so as to decrease the volume 
thereof. Thus, in the conventional BIC where the inner bag was adhered to 
the inner four side surfaces of the carton, when the content was 
discharged, the inner bag was not deformed. Thus, in this construction, 
the BIC was not used for a vessel for a high-viscosity liquid. In 
addition, when the BIC is charged with a liquid which is adversely 
affected by air, the inner bag should be deformed. Thus, the conventional 
BIC could not be used likewise. 
DISCLOSURE OF THE INVENTION 
The present invention is made from the above-described stand points. An 
object of the present invention is to provide a BIC and a pouring spout 
thereof which are-suitable for packaging a high-viscosity liquid or a 
liquid which is adversely affected by air. 
A first aspect of the present invention is a bag-in-carton, comprising a 
closed box-shaped carton, a flexible inner bag disposed in the carton and 
adapted for containing a content, and a pouring spout disposed on the 
carton and piercing through the inner bag, wherein a portion of the inner 
bag on the side of the pouring spout is adhered and fixed to the inner 
surfaces of the carton, and wherein the area of the fixed portion of the 
inner bag is larger than the area of a movable portion of the inner bag 
other than the fixed portion. 
A second aspect of the present invention is a bag-in-carton, comprising a 
flat carton formed in a substantially rectangularly parallelopiped shape 
and having a pair of opposed wide surfaces, a flexible inner bag disposed 
on the inner surfaces of the carton and adapted for containing a content, 
and a pouring spout disposed on the carton and piercing through the inner 
bag, wherein the inner bag is adhered and fixed to the pair of wide 
surfaces. 
A third aspect of the present invention is a bag-in-carton, comprising a 
carton formed in a substantially rectangularly parallelopiped shape, a 
flexible inner bag disposed in the carton and adapted for containing a 
content, and a pouring spout disposed on the carton and piercing through 
the inner bag, wherein the inner bag is adhered and fixed to strip areas 
disposed on a pair of opposed surfaces of the carton, the areas having a 
predetermined width and extending along their center line of the surfaces. 
A fourth aspect of the present invention is a bag-in-carton, comprising a 
carton formed in a substantially rectangularly parallelopiped shape, a 
flexible inner bag disposed in the carton and adapted for containing a 
content, and a pouring spout disposed on the carton and piercing through 
the inner bag, wherein the inner bag is adhered and fixed to two adjacent 
surfaces of the carton, and wherein the pouring spout is disposed on one 
of the two surfaces. 
A fifth aspect of the present invention is a bag-in-carton, comprising a 
carton formed in a substantially rectangularly parallelopiped shape, a 
flexible inner bag disposed on the inner surfaces of the carton and 
adapted for containing a content, and a pouring spout disposed on the 
carton and piercing through the inner bag, wherein an inclined surface is 
formed between two adjacent surfaces of the carton, wherein the pouring 
spout is disposed on the inclined surface, wherein the inner bag is 
adhered and fixed to a portion on the pouring spout side of the inner 
surfaces of the carton, and wherein the area of the fixed portion of the 
inner bag is larger than the area of a movable portion other than the 
fixed portion. 
A sixth aspect of the present invention is a bag-in-carton, comprising a 
carton formed in a substantially rectangularly parallelopiped shape, a 
flexible inner bag disposed on the inner surfaces of the carton and 
adapted for containing a content, and a pouring spout disposed on the 
carton and piercing through the inner bag, wherein the pouring spout is 
disposed at an end portion of one surface of the carton, wherein a side 
flap is disposed in the vicinity of the pouring spout and on one surface 
of the carton adjacent to the surface on which the pouring spout is 
disposed, the side flap being rotatable about an end portion of the 
surface on which the pouring spout is disposed, and wherein the inner bag 
is adhered and fixed to the inner surface of the side flap. 
A seventh aspect of the present invention is a bag-in-carton, comprising a 
carton formed in a substantially rectangularly parallelopiped shape, and a 
pouring spout disposed on the carton and piercing through the inner bag, 
wherein the inner bag is adhered and fixed to a portion on the pouring 
spout side of the inner surfaces of the carton, wherein the area of the 
fixed portion of the inner bag is larger than the area of a movable 
portion other than the fixed portion, wherein the inner bag is formed by 
sealing both ends of a cylindrical film and bottom side portions of 
triangular flaps formed on both sides of both ends of the cylindrical 
film. 
An eighth aspect of the present invention is a pouring spout disposed on a 
flexible bag, comprising a cylindrical portion defining a through-hole 
which pierces through the inside and outside of the bag, a flange disposed 
on an outer periphery of the cylindrical portion and connected to the 
inner surface of the bag, and a passage member connected to the flange and 
extending to the inside of the bag, the passage member and the flange 
being integrally formed. 
According to the first aspect, in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the first aspect can be inexpensively produced as 
with the conventional BIC. Since the movable portion of the inner bag 
which is disposed on the opposite side of the pouring spout is not adhered 
to the inner surfaces of the carton, as the content is discharged, the 
movable portion is deformed. Thus, the volume of the inner bag can be 
decreased. In addition, the content can be discharged from the inner bag 
without necessity of charging it with air. Finally, since the movable 
portion of the inner bag goes into the fixed portion which is adhered to 
the inner surfaces of the carton, almost all the content can be discharged 
from the inner bag. Since the movable portion of the inner bag is smaller 
than the half thereof, when the movable portion thereof goes into the 
fixed portion, the movable portion never comes in contact with the fixed 
portion, thereby preventing the content from being closed. Thus, almost 
all the content of the inner bag can be discharged. 
According to the second aspect, in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the second aspect can be inexpensively produced as 
with the conventional BIC. Since the inner pressure of the inner bag 
decreases, atmospheric pressure works in the direction that the inner bag 
is squashed. Since the inner bag is adhered to the opposed wide surfaces, 
an outer pressure works in the direction that the carton is squashed. 
Thus, the opposed wide surfaces are bent and approached to each other. 
Thus, the volume of the inner bag decreases. Therefore, without necessity 
of charging the inner bag with air, the content can be discharged. In 
addition, since the carton is flat and easily squashed, the volume of the 
inner bag and the remainder of the content can be much decreased. 
According to the third aspect in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the third aspect can be inexpensively produced as 
with the conventional BIC. Since the content is discharged through the 
pouring spout, as the content is discharged, the inner pressure of the 
inner bag decreases. Thus, atmospheric pressure works in the inner bag in 
the direction that it is squashed. Although the fixed portions of the 
inner bag are adhered and fixed to the strip areas on the inner surfaces 
of the carton, the portions which are perpendicular thereto are movable. 
Thus, the movable portions are inwardly deformed in the inner bag by the 
atmospheric pressure. Thus, the volume of the inner bag decreases. 
Therefore, without necessity of charging the inner bag with air, the 
content can be sucked and discharged. At this point, the inner bag is 
inwardly deformed from both the ends of the fixed portions fixed on the 
inner surfaces of the carton. Thus, the inner bag is not unstably 
deformed, thereby preventing the content from being closed in the inner 
bag. Consequently, almost all the content can be discharged from the inner 
bag. Therefore, the remainder of the content can be decreased. 
According to the fourth aspect, in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the fourth aspect can be inexpensively produced as 
with the conventional BIC. Although the portion of the inner bag on the 
pouring spout side is adhered and fixed to the two surfaces of the carton, 
the other portion of the inner bag is movable. As the content is sucked 
and discharged through the pouring spout, the movable portion is deformed. 
Thus, since the volume of the inner bag can be decreased, the content can 
be discharged without necessity of charging the inner bag with air. Last, 
the movable portion of the inner bag goes into the fixed portion adhered 
to the inner surfaces of the carton. Thus, almost all the content can be 
discharged. 
When the pouring spout is disposed in the vicinity of the edge line where 
the two surfaces corresponding to the inner surfaces to which the inner 
bag is adhered intersect each other, the pouring spout is present in the 
vicinity of the edge point of the fixed portion of the inner bag. Thus, 
when the content is discharged, the moving portion of the inner bag is 
moved to the pouring spout at last. Therefore, just after the content is 
discharged, the pouring spout is not blocked by the moving portion of the 
inner bag. Thus, almost all the content can be discharged. 
According to the fifth aspect, in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the fifth aspect can be inexpensively produced as 
with the conventional BIC. Since a half portion of the inner bag disposed 
on the opposite side of the pouring spout side is freely movable, as the 
content is discharged (by a sucking means) from the pouring spout, this 
movable portion is deformed. Thus, since the volume of the inner bag can 
be decreased, without necessity of charging it with air, the content can 
be discharged. Last, the movable portion goes into the other portion of 
the inner bag which is fixed to the inner surfaces of the carton. Thus, 
almost all the content can be discharged. In addition, since the pouring 
spout is disposed on an inclined surface of the carton, when a plurality 
of the BICs are placed in a row or stacked for transportation, storage, or 
the like, their pouring spouts do not obstructively extrude. Thus, a large 
number of BICs can be compactly placed in a row. 
According to the sixth aspect, in the construction of the bag-in-carton 
(BIC), the inner bag is adhered to the inner surfaces of the carton. Thus, 
the BIC according to the sixth aspect can be inexpensively produced as 
with the conventional BIC. Since a half portion of the inner bag disposed 
on the opposite side of the pouring spout side is freely movable, as the 
content is discharged (by a sucking means) from the pouring spout, this 
movable portion is deformed. Thus, since the volume of the inner bag can 
be decreased, without necessity of charging it with air, the content can 
be discharged. Last, the movable portion goes into the other portion of 
the inner bag which is fixed to the inner surfaces of the carton. Thus, 
almost all the content can be discharged. In addition, since the inner bag 
is gradually moved along with the side flap, the inner bag never blocks 
the pouring spout. Thus, the content can be stably discharged. 
Consequently, in many BICs, the deviation of the remainder of the content 
thereof can be decreased. 
According to the seventh aspect, since the bottom sides of the triangular 
flaps formed on both the upper and lower ends of the inner bag are sealed, 
the content is not closed in the triangular flaps. Thus, the remainder of 
the content can be decreased. In addition, since the sealed portions serve 
to keep the inner bag in a substantially rectangularly parallelopiped 
shape when the content is discharged, the second seal portions allow the 
inner bag to be equally deformed. 
According to the eighth aspect, when the pouring spout is mounted to the 
inner bag, the passage member can be aligned in the predetermined 
position. Thus, the mounting process can be simplified. When the BIC is 
used, the passage member is kept in the predetermined position of the hole 
of the pouring spout. Thus, when the content is discharged from the inner 
bag through the pouring spout, even if part of the inner bag is moved to 
the passage member, it can hold the inner bag, thereby securing the 
passage of the liquid to the hole of the cylindrical portion,. Thus, the 
content can be smoothly discharged from the inner bag and the remainder 
thereof can be decreased.

PREFERRED EMBODIMENTS 
Next, preferred embodiments of the present invention will be described. 
First Embodiment 
FIGS. 1A and 1B are schematic sectional views of a bag-in-carton (BIC) 
according to a first embodiment of the present invention. FIG. 1A shows 
the BIC which has been charged with its content, whereas FIG. 1B shows the 
BIC whose content has been discharged. FIG. 2 is a perspective view 
showing the BIC. In FIGS. 1A, 1B, and 2, reference numeral 1 is the BIC 
which is composed of a carton 2 and an inner bag 3. The carton 2 is an 
outer vessel. The inner bag 3 contains a liquid 4 such as an ink. The 
carton 2 is formed in a rectangularly parallelopiped shape and has a lower 
surface 2a, a front surface 2b, side surfaces 2c and 2d, a rear surface 
2e, and an upper surface 2f, each of which is flat. 
A pouring spout 5 is disposed at the lower end of the front surface 2b of 
the carton 2. The pouring spout 5 pierces through the inner bag 3. The 
pouring spout 5 is closed by a cap 6. The pouring spout 5 has a 
cylindrical portion 5a which extends to the inside of the inner bag 3. A 
groove-shaped passage 5b which allows the liquid to pass is formed on a 
side surface of the cylindrical portion 5a. Since the passage 5b is 
formed, even if the end of the cylindrical portion 5a is blocked by the 
inner bag 3, the content 4 can be discharged from the pouring spout 5 
through the passage 5b. 
The inner bag 3 partially is adhered and fixed to the inner surfaces of the 
carton 2. In practice, a fixed portion of the inner bag 3, which is fixed 
to the carton 2, is a substantially rectangular portion on the pouring 
spout side, the rectangular portion being defined by a chain double-dashed 
line 8 shown in FIGS. 1A and 2. The other portion behind the chain 
double-dashed line 8 is a movable portion of the inner bag 3. The same 
chain double-dashed line 8 is defined both on the side surfaces 2c and 2d. 
The chain double-dashed line 8 is a boundary of the fixed portion and the 
movable portion of the inner bag 3. The length of the fixed portion on the 
pouring spout side is slightly larger than the length of the movable 
portion on the other side. In addition, the length between the lower end 
of the chain double-dashed line 8 and the lower end of the front surface 
2b is slightly larger than the length between the upper end of the chain 
double-dashed line 8 and the upper end of the front surface 2b so that the 
movable portion of the inner bag 3 can properly go into the fixed portion 
thereof. Thus, in this embodiment, as shown in FIG. 1A, the distance d1 
between the upper end of the chain double-dashed line 8 and the upper end 
of the front surface 2b is the half of the width d of the inner bag 3 or 
slightly larger than that by around 1 to 10 mm. In addition, the distance 
d2 between the lower end of the chain double-dashed line 8 and the lower 
end of the front surface 2b is slightly larger than the distance d1 by 
around 1 to 15 mm. Provided that the distance between the chain 
double-dashed line 8 and the front surface 2b is equal to the half of the 
width d of the inner bag 3 or slightly larger than that, the path of the 
chain double-dashed line 8 is not limited to that as shown in the figure. 
Instead, the chain double-dashed line 8 may be in parallel with the front 
surface 2b. In addition, the chain double-dashed line 8 may be defined so 
that d1 is slightly larger than d2. 
A portion in the vicinity of the chain double-dashed line 8 and at least a 
part of the fixed portion of the inner bag 3 are adhered to the front 
surface 2b, and the side surfaces 2c and 2d. Thus, the fixed portion of 
the inner bag 3 is fixed to the inner surfaces of the carton 2. Therefore, 
the area of the fixed portion does not always accord with the area where 
the inner bag 3 is adhered to the inner surfaces of the carton 2. In FIGS. 
1A, 1B, and 2, reference 9 represents paste areas at which the inner bag 3 
is adhered to the inner surfaces of the carton 2. Thus, the area of the 
inner bag 3 which is slightly larger than the area on the pouring spout 
side is fixed to the inner surfaces of the carton 2. The other area is not 
fixed to the inner surfaces of the carton 2. Thus, this area is a movable 
portion of the inner bag 3. 
Next, the production method of the bag-in-carton (BIC) 1 in the 
above-described construction will be described. A carton blank 2' as shown 
in FIG. 3A is prepared. The inner bag 3 is adhered to a area defined by 
two chain double-dashed lines 8 on the inner surfaces of the carton blank 
2'. A paste (for example, an emulsion) 9 is adhered to panels 2b' and 2c' 
of the carton blank 2' (which accord with the front surface 2b and the 
side surface 2c of the carton 2). The paste 9 is applied while the carton 
blank 2' is being conveyed in the array direction of the figure. Thus, the 
paste 9 is straightly applied as shown in the figure. It is difficult to 
precisely apply the paste 9 along the inclined chain double-dashed lines 
8. In this embodiment, the paste 9 is applied to short areas in the 
vicinity of the chain double-dashed lines 8 along with the straight area. 
As shown in FIG. 3B, a film is formed in a cylindrical shape (both the 
longitudinal ends of the film are sealed). The cylindrically adhered film 
is cut in a predetermined length. (In a later step, the upper and lower 
ends of the cylindrically adhered film 3' will be sealed so as to form the 
inner bag.) The cylindrically adhered film 3' is adhered to the inner 
surfaces of the carton blank 2' as shown in FIG. 4A. The cylindrically 
adhered film 3' is not limited to that shown in FIG. 3B. The cylindrically 
adhered film 3' may be formed by layering two films and sealing both the 
ends thereof. Next, as shown in FIG. 4B, the paste 9 is applied to a panel 
2d' of the carton blank 2' (according to the side surface 2d of the carton 
2). In addition, the paste 9 is applied to the rear surface of a paste-up 
margin 2g'. As shown in FIG. 4C, the panels 2d' and 2e' are folded and 
adhered to each other so as to adhere them to the cylindrically adhered 
film 3'. Thus, a flat BIC 1' which has not been assembled is formed. 
Next, the flat BIC 1' is conveyed to an assembling and charging step. In 
this step, the BIC 1' is shaped in a square pillar shape. A portion for 
mounting the pouring spout 5 is blanked and then the pouring spout 5 is 
mounted thereon. The lower end of the cylindrically adhered film 3' is 
sealed and then the lower portion of the carton blank 2' is assembled. The 
upper end of the cylindrically adhered film 3' is sealed and then the 
upper portion of the carton blank 2' is assembled. Thus, the inner bag 3 
has been contained in the carton 2 and the BIC 1 has been assembled. Since 
these production steps can be performed by the conventional BIC production 
technique, for the sake of the simplicity, the description of the 
production facility and so forth are omitted. The inner bag 3 is deaerated 
from the pouring spout 5 and then charged with the content 4 such as an 
ink. Thus, the state as shown FIG. 1A takes place. 
When the BIC 1 which has been charged with the content 4 is used, as shown 
in FIGS. 1A and 1B, it is set to a printer or the like in its upright 
style. The pouring spout 5 is connected to a sucking device (not shown) so 
as to discharge the content 4 from the pouring spout 5. At this time, 
since the movable portion of the inner bag 3 which is disposed on the 
opposite side of the pouring spout 5 is not adhered to the inner surfaces 
of the carton 2, as the content is discharged, the movable portion is 
deformed as denoted by chain double-dashed lines 11a, 11b, and 11c of FIG. 
1B. Thus, the content is discharged from the inner bag 3 without necessity 
of charging it with air. Finally, since the movable portion of the inner 
bag 3 goes into the fixed portion which is adhered to the inner surfaces 
of the carton, almost all the content can be discharged from the inner bag 
3. 
Since the movable portion of the inner bag 3 is smaller than the half 
thereof, when the movable portion thereof goes into the fixed portion, the 
movable portion never comes in contact with the fixed portion, thereby 
preventing the content from being closed. Thus, almost all the content of 
the inner bag 3 can be discharged. In particular, as shown in FIGS. 1A, 
1B, and 2, when the boundary of the movable portion and fixed portion of 
the inner bag 3 (defined by the chain double-dashed line 8) is slightly 
inclined so that the length between the upper end of the boundary and the 
upper end of the front surface 2b is slightly shorter than the length 
between the lower end of the boundary and the lower end of the front 
surface 2b, just after the content is discharged from the inner bag 3, the 
movable portion of the inner bag 3 never moves to the pouring spout 3, 
thereby preventing the movable portion from blocking the passage of the 
content. Thus, almost all the content can be smoothly discharged from the 
inner bag 3. The lower end of the boundary is preferably as apart from the 
pouring sport 5 as possible so as to prevent the movable portion of the 
inner bag 3 from blocking the pouring spout 5. However, since the content 
tends to reside at the bottom of the inner bag 3, the area of the bottom 
of the inner bag 3 is preferably as small as possible. From this point of 
view, the position of the lower end of the boundary is preferably as close 
to the pouring spout 5 as possible. The BIC according to this embodiment 
satisfies these requirements. 
In the above-described embodiment, as shown in FIG. 3, the inner bag 3 was 
adhered to the area defined by the two chain double-dashed lines 8 on the 
inner surfaces of the carton blank 2'. To adhere the inner bag 3 to this 
area, the paste 9 was applied in a straight line pattern (shown in FIGS. 
3A, 3B, 4A, 4B, and 4C). However, the areas to which the paste 9 is 
applied are not limited to this pattern shown in these figures. Instead, 
as shown in FIG. 5A, a paste 9a may be applied in an intermittent line 
pattern. In addition, a paste 9b may be applied in a spot pattern. 
In the above-described embodiment, the pouring spout 5 had the cylindrical 
portion 5a which extends to the inside of the inner bag 3. However, the 
pouring spout 5 is not limited to such a construction. Instead, a 
conventional pouring spout which does not have a cylindrical portion may 
be used. In addition, a passage member which secures the passage of the 
content upon the injection of the movable portion of the inner bag 3 into 
the fixed portion thereof may be disposed at the bottom of the inner bag 
3. An example of this passage member is an H-letter-shaped rod member. 
In the embodiment shown in FIGS. 1A and 1B, the boundary of the moving 
portion and fixed portion of the inner bag 3 was slightly inclined from 
the vertical line of the carton. However, the boundary may be largely 
inclined. FIG. 6 shows an example of this construction. In the figure, 
reference numeral 21 is a BIC which is composed of a rectangularly 
parallelopiped carton 22 and an inner bag 23 contained therein. The inner 
bag 23 is charged with its content 24. In the figure, a chain 
double-dashed line 28 is shown just above a diagonal line of side surfaces 
of the carton. The chain double-dashed line 28 defines a boundary of a 
fixed portion and a movable portion of the inner bag 23. In the figure, 
the movable portion of the inner bag 23 is disposed above the fixed 
portion thereof. The fixed portion of the inner bag 23 which is lower than 
the chain double-dashed line 28 is fixed to the inner surfaces of the 
carton 22. Thus, in this example, a paste 29 is applied to the inner 
surfaces of the carton 22 so that paste areas have different height. The 
fixed portion of the inner bag 23 is adhered to these paste areas. In FIG. 
6, unlike with the pouring spout 5 used in the embodiment shown in FIG. 1, 
a conventional pouring spout 25 which does not have an extending member is 
used. In this example, an H-letter shaped passage member 30 is disposed in 
the inner bag 23. In this example, as the content 24 is discharged from 
the inner bag 23, the movable portion thereof is deformed and goes into 
the fixed portion. Thus, the content can be smoothly discharged. At this 
time, since the passage member 30 prevents the movable portion from being 
in contact with the lower surface of the inner bag, the passage which 
allows the content to pass can be secured. In this example, the passage 
member 30 may be omitted and the pouring spout used in the embodiment 
shown in FIG. 1 may be used. 
FIG. 7 shows another modification of the first embodiment. In the figure, 
reference numeral 31 is a BIC which is composed of a rectangularly 
parallelopiped carton 32 and an inner bag 33 contained therein. The inner 
bag 33 is charged with a content 34. In the figure, a chain double-dashed 
line 38 is shown just above a diagonal line of side surfaces of the 
carton. The chain double-dashed line 38 defines a boundary of a fixed 
portion and a movable portion of the inner bag 33. The upper rectangular 
portion defined by the chain double-dashed line 38 is the fixed portion of 
the inner bag 33. The fixed portion is adhered to the inner surfaces of 
the carton by a paste 39. The lower portion of the inner bag 33 is the 
movable portion. In this modification, a pouring spout 35 which is the 
same as the pouring spout 5 of the embodiment shown in FIG. 1 is used. As 
with the embodiment shown in FIG. 1 and the first modification of this 
embodiment shown in FIG. 6, as the content 34 is discharged from the inner 
bag, the movable portion thereof is deformed and goes into the fixed 
portion. Thus, the content can be smoothly discharged. 
In the above-described embodiment and the modifications thereof, the BIC 
was set to a machine in an upright Style and the content was discharged 
from the pouring spout disposed at the lower end on the front surface of 
the BIC. However, the discharging of the content is not limited to such a 
manner. Instead, the discharging method can be changed corresponding to 
the machine to which the BIC is set. For example, the front surface of the 
BIC may be placed down so that the pouring spout faces downward. In other 
words, the pouring spout may be disposed at any position on the front 
surface rather than at the lower end of the front surface of the 
embodiment shown in FIG. 1. In addition, in the above-described embodiment 
and the modifications thereof, the upper surface of the carton was flat. 
However, the upper surface of the carton is not always flat. Instead, the 
upper surface of the carton may be formed in another shape. 
As described above, according to the first embodiment, the cylindrically 
adhered film which is the inner bag is adhered to the carton blank. The 
carton blank is adhered in a box shape. The upper and lower ends of the 
cylindrically adhered film are sealed. In addition, the lower portion and 
the upper portion of the carton blank are assembled. Thus, the BIC has 
been formed. Therefore, the BIC according to the first embodiment can be 
inexpensively produced as with the conventional BIC. Moreover, since the 
BIC according to this embodiment is formed of two layers of the inner box 
and the carton, the content thereof can be securely protected. Moreover, 
the portion which is slightly larger than the half of the inner bag is a 
fixed portion which is fixed to the inner surfaces of the carton, while 
the other portion thereof is a movable portion. Thus, while the movable 
portion of the inner bag is injected into the fixed portion, almost all 
the content can be discharged from the inner bag through the pouring 
spout. Thus, the BIC can be effectively used for a carton for a 
high-viscosity solution and a solution which is adversely affected by air. 
Second Embodiment 
Next, a second preferred embodiment of the present invention will be 
described. 
FIGS. 8A and 8B are schematic sectional views taken along a plane 
perpendicular to the longitudinal direction of a bag-in-carton (BIC) 
according to a second embodiment of the present invention. FIG. 8A shows 
the state of the BIC which has been charged with its content, whereas FIG. 
8B shows the state of the BIC whose content has been discharged. FIGS. 9A 
and 9B are schematic sectional views taken along a center plane in 
parallel with the longitudinal direction of the BIC. FIG. 9A shows the 
state of the BIC which has been charged with its content, whereas FIG. 9B 
shows the state of the BIC whose content has been discharged. FIGS. 10A 
and 10B are schematic perspective views of the BIC. FIG. 10A shows the 
state of the BIC with the side of a pouring spout up, whereas FIG. 10B 
shows the state of the BIC with the side of the pouring spout down. In 
FIGS. 8A to 10B, reference numeral 101 is the BIC according to the second 
embodiment. The BIC 101 is composed of a carton 102 and a flexible inner 
bag 103 contained therein. The carton 102 forms an outer vessel. The inner 
bag 103 contains a content 104 which is a liquid such as an ink. 
The carton 102 is formed in a rectangularly parallelopiped shape and has a 
pair of opposed wide surfaces 102a and 102b, a pair of opposed narrow side 
surfaces 102c and 102d, and a pair of opposed narrow end surfaces 102e and 
102f. A pouring spout 105 is disposed at a center portion in the lateral 
direction of the surface 102a. The pouring spout 105 pierces through the 
inner bag 103. The pouring spout 105 is closed by a cap 106. The pouring 
spout 105 has a flange 105a and a protruding portion 105b. The flange 105a 
is connected to the inner bag 103. The protruding portion 105b extends to 
the inside of the inner bag 103. A passage 105c which allows the liquid to 
pass is formed between the flange 105a and the protruding portion 105b. 
Thus, as will be described later, when the surface 102b is approached to 
the pouring spout 105 as the content 104 is discharged, the protruding 
portion 105b holds the surface 102b, thereby preventing the passage of the 
pouring spout 105 from being blocked. The surface 102b which is opposed to 
the pouring spout 105 has ruled-lines 107 (see FIG. 10B) so as to easily 
bend the surface 102b as the content is discharged. These ruled lines 107 
are formed by a line forming process or the like (See FIG. 10B). The 
surface 102a with the pouring spout 105 may or may not have ruled-lines. 
The inner bag 103 is adhered to the opposed wide surfaces 102a and 102b of 
the carton 102 in such a way that the inner bag 103 is fixed to almost all 
the areas of the surfaces 102a and 102b of the carton 102. However, all 
the area of the inner bag 103 is not always adhered to the surfaces 102a 
and 102b. In other words, the inner bag 103 may be partially adhered to 
the surfaces 102a and 102b. 
Next, the production method of the BIC 101 will be described. 
As shown in FIGS. 11A and 11B, a carton blank 102' where a card board has 
been blanked in a predetermined shape is prepared so as to form the 
carton. In addition, a cylindrically adhered film 103' is prepared. The 
cylindrically adhered film 103' is formed by sealing both the ends of a 
film and then by cutting it in a predetermined length. (In the later step, 
the upper and lower ends of the cylindrically adhered film 103' will be 
sealed so as to form the inner bag.) The cylindrically adhered film 103' 
is not limited to that shown in FIG. 11B. The cylindrically adhered film 
103' may be formed by layering two films and sealing both the ends 
thereof. 
Next, a paste (for example, an emulsion) 109 is applied to panels 102a' and 
102b' of the carton blank 102' (according to the wide surfaces 102a and 
102b of the carton 102). Since the paste 109 is applied while the carton 
blank 102' is being conveyed in the arrow direction of the figure, the 
paste 109 is applied in a straight line pattern as shown in FIG. 11A. In 
addition, the paste 109 is applied to the rear surface of a paste-up 
margin 102g'. The paste positions and paste-pattern are not limited to 
those shown in the figure. Instead, they may be properly modified. For 
example, the paste 109 may be applied in a spot pattern. 
Next, the cylindrically adhered film 103' is placed on the panels 102a' and 
102c' of the carton blank 102' (according to the surfaces 102a and 102c of 
the carton 102) and then adhered to each other by the paste 109. The 
adhered state of the cylindrically adhered film 103' to the carton blank 
102' is shown in FIG. 12. Next, as shown in FIG. 13, the panels 102b' and 
102d' of the carton blank 102' (according to the surfaces 102b and 102d of 
the carton 102) are folded and then adhered to each other. Thus, a flat 
BIC 101' which has not been assembled is formed. 
The flat BIC 101' is conveyed to an assembling and charging step. In this 
step, the BIC 101' is shaped in a square pillar shape and then blanked for 
the pouring spout 105. The pouring spout 105 is mounted on the BIC 101'. 
One end of the cylindrically adhered film 103' is sealed. One end of the 
carton blank 102' is assembled. The other end of the cylindrically adhered 
film 103' is sealed and then the other end of the carton blank 102' is 
assembled. Thus, as shown in FIGS. 10A and 10B, the BIC 101 where the 
inner bag has been contained in the carton 102 has been assembled. Since 
these steps are performed by the conventional BIC producing technique, for 
the sake of the simplicity, the production facility and so forth for the 
BIC 101 are omitted. Last, the inner bag 103 is deaerated and then the BIC 
101 is charged with the content 104 such as an ink. Thus, the state as 
shown in FIGS. 8A and 9A takes place. 
When the BIC 101 which has been charged with the content 104 is used, as 
shown in FIGS. 8A to 9B, the BIC 101 is set to a machine (such as a 
printer) in such a way that the pouring spout 105 is placed down. A 
connector of a sucking device of the machine (not shown) is connected to 
the pouring spout 105 so as to discharge the content 104. Thus, since the 
inner pressure of the inner bag 103 decreases, atmospheric pressure works 
in the direction that the inner bag is squashed. Since the inner bag 103 
is adhered to the wide opposed surfaces 102a and 102b, an outer pressure 
works in the direction that the carton is squashed. Thus, the opposed wide 
surfaces 102a and 102b which are not strong are bent and approached to 
each other as shown by two chain double-dashed lines 111a and 111b. Thus, 
the volume of the inner bag 103 decreases. Thus, without necessity of 
charging the inner bag with air, the content 104 can be discharged. As 
described above, since the surfaces 102b has the ruled-lines (see FIGS. 
10A and 10B) along which the surface 102b is easily bent, the surface 102a 
which has the pouring spout 105 is less deformed than the surface 102b. 
This feature is preferable in the case that the BIC 101 is set to the 
machine by connecting the pouring spout 105 to the connector of the 
machine (not shown). When the surfaces 102a and 102b can be equally bent, 
the ruled lines are preferably formed on the surface 102a as well as the 
surface 102b. 
When the content 104 is continuously discharged from the inner bag 103 
through the pouring spout 105, the opposed surfaces 102a and 102b are 
approached to each other. Finally, as shown in FIGS. 8B and 9B, these 
surfaces 102a and 102b are very closely approached to each other. At this 
point, a peripheral portion 103a of the inner bag 103 is pulled inside 
thereof. Thus, since the volume of the inner bag 103 becomes very small, 
almost all the content 104 can be discharged from the inner bag 103. 
Consequently, the remainder of the content 104 becomes very small. To 
allow the peripheral portion 103a of the inner bag 103 to be pulled inside 
thereof, the inner bag 103 is preferably not adhered to the peripheral 
portions of the wide surfaces 102a and 102b. However, even if the inner 
bag 103 is adhered to these portions, when it is peelable, the effect of 
this embodiment is not affected. 
As described above, in the BIC 101, the opposed wide portions of the inner 
bag 103 are adhered to the opposed wide surfaces 102a and 102b of the 
carton 102. In addition, these portions of the inner bag 103 are deformed 
as the surfaces 102a and 102b are deformed. Thus, these portions are 
deformed gradually and stably as the content is discharged. Thus, just 
after the content 104 is discharged, the inner bag 103 neither blocks the 
pouring spout, nor locally closes the content in the inner bag. Thus, the 
content can be smoothly discharged. 
The sizes of the surfaces 102a and 102b are determined so that they are 
deformed corresponding to the strength of the card board, the discharging 
force with which the content is discharged from the inner bag, and so 
forth. To allow the content 104 to be smoothly discharged as the surfaces 
102a and 102b are deformed as shown in FIG. 8B, the width W of the carton 
102 should be much larger than the thickness D of the carton 102. Although 
the ratio of (W/D) depends on the strength of the carton 102, it is 
preferably 2 or higher. An example of the practical dimensions of the 
above-described carton 102 is 130 mm (W).times.220 mm (H).times.40 mm (D). 
In the above-mentioned embodiment, the pouring spout 105 was disposed on 
the wide surface 102a. However, the pouring spout 105 may be disposed on 
one of the narrow surfaces 102c to 102f. 
Next, a modification of the second embodiment will be described. 
FIGS. 14A and 14B are schematic sectional views taken along a plane 
perpendicular to the longitudinal direction of a BIC according to a 
modification of the second embodiment of the present invention. FIG. 14A 
shows the state of the BIC which has been charged with its content, 
whereas FIG. 14B shows the state of the BIC whose content has been 
discharged. FIG. 15 is a schematic sectional view taken along a center 
plane in parallel with the longitudinal direction of the BIC. FIG. 16 is a 
schematic perspective view of the BIC. In FIGS. 14A to 16, reference 
numeral 121 is the BIC. The BIC 121 is constructed of a carton 122 and a 
flexible inner bag 123 contained therein. The carton 122 forms an outer 
vessel. The inner bag 123 contains a content 124 which is a liquid such as 
an ink. 
The carton 122 according to this modification is not flatter than the 
carton 102 shown in FIGS. 10A and 10B. However, as with the carton 102, 
the carton 122 is formed in a rectangularly parallelopiped shape and has a 
pair of opposed surfaces 122a and 122b, a pair of opposed side surfaces 
122c and 122d, and a pair of opposed end surfaces 122e and 122f. A pouring 
spout 125 is disposed at a center portion in the lateral direction of the 
surface 122a. The pouring spout 125 pierces through the inner bag 123. The 
pouring spout 125 is closed by a cap 126. The pouring spout 125 has a 
flange 125a and a protruding portion 125b. The flange 125a is connected to 
the inner bag 123. The protruding portion 125b extends to the inside of 
the inner bag 123. A passage 125c which allows the liquid to pass is 
formed between the flange 125a and the protruding portion 125b. Thus, as 
will be described later, when the surface 122b is approached to the 
pouring spout 125 as the content 124 is discharged, the protruding portion 
125b holds the surface 122b, thereby preventing the passage of the pouring 
spout 125 from being blocked. In addition, the flange 125a of the pouring 
spout 125 is integrally connected to an H-letter-shaped passage member 
125d. The passage member 125d is disposed in the inner bag 123 in the 
longitudinal direction of the carton 122. When the content 124 is 
discharged and then the movable portion of the inner bag 123 blocks the 
passage of the pouring spout 125, the passage member 125d holds the 
movable portion of the inner bag 123 so as to secure the passage of the 
pouring spout 125. The passage member 125d may be formed as an independent 
member, instead of the integral member of the pouring spout 125. Moreover, 
when not necessary, the passage member 125d may be omitted. 
The inner bag 123 is partially adhered and fixed to the opposed surfaces 
122a and 122b of the carton 122. The inner bag 123 is fixed at strip areas 
127a and 127b which extend along the center line in the longitudinal 
direction of the surfaces 122a and 122b. The strip areas 127a and 127b are 
shown by hatched lines of FIG. 16. Hereinafter, portions 123a and 123b of 
the inner bag 123 which are fixed at the strip areas 127a and 127b are 
referred to as fixed portions. The inner bag 123 may be fixed at the strip 
areas 127a and 127b by adhering the inner bag 123 to the strip areas 127a 
and 127b partially not fully. 
The widths w1 and w2 of the fixed portions 123a and 123b of the inner bag 
123 (namely, the strip areas 127a and 127b) are approximately the half of 
the width W of the carton 122. In addition, the width w1 of the fixed 
portion 123a is preferably larger than the width w2 of the fixed portion 
123b. Portions 123c which are perpendicular to the fixed portions 123a and 
123b are not adhered to the inner surfaces of the carton 122. Thus, the 
portions 123c are movable portions. 
The BIC 121 according to this modification is produced in the same manner 
as the BIC 101 according to the second embodiment shown in FIGS. 8A to 13. 
When the BIC 121 which has been charged with the content 124 is used, as 
shown in FIGS. 14A and 14B, the BIC 121 is set to a machine such as a 
printer in such a way that the pouring spout 125 is placed down. The 
pouring spout 125 is connected to a connector (not shown) of a sucking 
device disposed on the machine side. The content 124 is discharged through 
the pouring spout 125. As the content 124 is discharged, the inner 
pressure of the inner bag 123 decreases. Thus, atmospheric pressure works 
in the inner bag 123 in the direction that it is squashed. Although the 
fixed portions 123a and 123b of the inner bag 123 are adhered and fixed to 
the strip areas 127a and 127b on the inner surfaces of the carton 122, the 
portions 123c which are perpendicular thereto are movable. Thus, the 
movable portions 123c are inwardly deformed in the inner bag 123 by the 
atmospheric pressure. Thus, the volume of the inner bag 123 decreases. 
Therefore, without necessity of charging the inner bag 123 with air, the 
content 124 can be sucked and discharged. At this point, as shown by chain 
double-dashed lines 131a and 131b, the inner bag 123 is inwardly deformed 
from both the ends of the fixed portions 123a and 123b fixed on the inner 
surfaces of the carton 122. Thus, the inner bag 124 is not unstably 
deformed, thereby preventing the content from being closed in the inner 
bag 124. Consequently, almost all the content can discharged from the 
inner bag 124. Last, as shown in FIG. 14B, since the opposed movable 
portions 123c of the inner bag 123 nearly come in contact with the fixed 
portions 123a and 123b, the volume of the inner bag 123 can be decreased, 
thereby decreasing the remainder of the content 124. 
In this modification, the strip areas 127a and 127b to which the inner bag 
123 is fixed are disposed along the center line extending in the 
longitudinal direction of the surfaces 122a and 122b of the carton. 
However, this modification is not limited to this construction. Instead, 
the inner bag 123 may be fixed in strip areas along the center line 
extending in the lateral direction of the surfaces 122a and 122b of the 
carton. The position of the pouring spout 125 is not limited to the 
surface 122a. Instead, the pouring spout 125 may be disposed on any other 
surface. In this case, the pouring spout 125 is preferably disposed on one 
of the strip areas. 
In the above-description, when the content is discharged, the BIC 101 (121) 
is set to the machine in such a way that the pouring spout is placed down. 
However, when the content is discharged from the BIC 101 (121), the 
pouring spout may be disposed in any position corresponding to the machine 
to which the BIC 101 (121) is set. 
As described above, in the bag-in-carton (BIC) shown in FIG. 8A to 13, the 
cylindrically adhered film which forms the inner bag is adhered to the 
carton blank. The carton blank is adhered in a box shape. Both the ends of 
the cylindrically adhered film are sealed. Both the ends of the carton 
blank are assembled. Thus, the BIC is formed. Consequently, the BIC 
according to the second embodiment and the modification thereof can be 
inexpensively produced as with the conventional BIC. In addition, since 
the BIC is dually formed of the inner bag and the carton, the content can 
be securely protected. However, in the second embodiment, since the flat 
carton is formed in such a way that most areas of the opposed wide 
surfaces are adhered to the inner bag, as the content is discharged 
through the pouring spout, the inner bag is stably deformed as the wide 
surfaces are deformed. Thus, the volume of the inner bag decreases. 
Consequently, without necessity of charging the inner bag with air, the 
content can be sucked and discharged. Moreover, since the inner bag is 
stably deformed, the volume of the inner bag and thereby the remainder of 
the content can be much decreased. Thus, the BIC according to the second 
embodiment can be effectively used for a packaging carton for a 
high-viscosity liquid and a liquid which is adversely affected by air. 
In addition, the BIC according to the modification of the second embodiment 
can be inexpensively produced as with the BIC according to the second 
embodiment. Moreover, since the BIC is dually formed of the inner bag and 
the carton, the content can be securely protected. Furthermore, in this 
modification, the inner bag is fixed to the strip areas extending along 
the center line of each of the opposed surfaces. Thus, when the content is 
discharged from the inner bag through the pouring spout, the movable 
portions perpendicular to the fixed portions fixed to the strip areas are 
inwardly and stably deformed. Thus, since the volume of the inner bag 
decreases, without necessity of charging the inner bag with air, the 
content can be sucked and discharged. In addition, since the inner bag is 
stably deformed, the volume of the inner bag and thereby the remainder of 
the content can be much decreased. Thus, the BIC according to the 
modification can be effectively used for a packaging carton for a 
high-viscosity liquid and a liquid which is adversely affected by air. 
Third Embodiment 
Next, a third embodiment of the present invention will be described. 
FIGS. 17A and 17B are schematic sectional views showing a bag-in-carton 
(BIC) according to a third embodiment of the present invention. FIG. 17A 
shows the state of the BIC which has been charged with its content, 
whereas FIG. 17B shows the state of the BIC whose content has been 
discharged. FIG. 18 is a schematic perspective view showing the BIC. In 
FIGS. 17A, 17B, and 18, reference numeral 201 is the BIC according to the 
third embodiment. The BIC 201 is composed of a carton 202 and a flexible 
inner bag 203 contained therein. The carton 202 forms an outer vessel. The 
inner bag 203 contains a content 204 which is a liquid such as an ink. The 
carton 202 is rectangularly parallelopiped and has six rectangular 
surfaces which are four side surfaces 202a, 202b, 202c, 202d and two end 
surfaces 202e and 202f, each of which is planar. 
The inner bag 203 is partially adhered and fixed to the inner surfaces of 
the carton 202. The fixed portions of the inner bag 203 are portions 
according to the two adjacent side surfaces 202b and 202c of the carton 
202. However, it is not necessary to fully adhere the inner bag 203 to the 
side surfaces 202b and 202c. Instead, the inner bag 203 is partially 
adhered to the side surfaces 202b and 202c in such a way that almost all 
the areas of the inner bag 203 corresponding to the side surfaces 202b and 
202c are not moved. In this embodiment, the inner bag 203 is adhered to 
areas shown by hatched lines of FIG. 18. The areas of the inner bag 203 
according to the other surfaces 202a, 202d, 202e, and 202f of the carton 
202 are not adhered to the inner surfaces of the carton 202. Now, assume 
that the inner bag 203 is divided by a diagonal line X--X into a first 
portion on the side surfaces 202b and 202c and a second portion on the 
side surfaces 202a and 202d. The first portion on the side surfaces 202b 
and 202c becomes a fixed portion which is fixed to the inner surfaces of 
the carton 202, whereas the second portion on the side surfaces 202a and 
202b becomes a movable portion. Areas of the inner bag 203 according to 
the end surfaces 202e and 202f on the side of the first portion may be 
adhered thereto when necessary. 
A pouring spout 208 is disposed on the side surface 202b. The pouring spout 
208 pierces through the inner bag 203. The pouring spout 208 is closed by 
a cap 209. In this embodiment, the position of the pouring spout 208 on 
the side surface 202b is not limited. However, the pouring spout 208 
should be disposed at a position close to the lower end of the side 
surface 202b and in the vicinity of the edge line where the side surfaces 
202b and 202c intersect to each other. 
As shown in FIGS. 19 and 20, the pouring spout 208 has a cylindrical 
portion 211 and a flange 212. The cylindrical portion 211 has a thread 
portion 211a and a through-hole 211b. The thread portion 211a is formed on 
the outer periphery of the cylindrical portion 211. The through-hole 211b 
pierces through the cylindrical portion 211a. The flange 212 is formed on 
the outer periphery of the cylindrical portion 211 and adapted to mount 
the inner bag. The cylindrical portion 211 is formed so that it is fitted 
to a connector of a machine such as a printer (not shown). The cylindrical 
portion 211 has a ring-shaped groove 211c. This groove 211c is formed so 
as to reduce the wall thickness of the cylindrical portion 211. The groove 
211c may be omitted. The pouring spout 208 also has a cylindrical 
extruding portion 213 which surrounds the through-hole 211b and extends to 
the inside of the inner bag 203 beyond the flange 212. A plurality of 
groove-shaped passages 214 which allow the liquid to pass are formed on 
the side surfaces of the protruding portion 213. Since the protruding 
portion 213 having the passages 214 is provided, when the content is 
discharged, even if the movable portion of the inner bag 203 is 
excessively approached to the pouring spout 208, the end of the protruding 
portion 213 can hold the inner bag 203, thereby securing the flow of the 
content to the hole 211b through the passages 214. 
The flange 212 of the pouring spout 208 has a thin H-letter-shaped passage 
member 215 which is integrally formed therewith and extends in the 
direction thereof. The passage member 215 has a first flat plate member 
215a, a rib 215b, and a second flat plate member 215c. The first flat 
plate member 215a is disposed on a plane extended from the flange 212. The 
rib 215b is disposed nearly at the center of the first flat plate member 
215a and perpendicular thereto. The second flat plate member 215c is 
disposed at the end of the rib 215b and in parallel with the first flat 
plate member 215a. As shown in FIGS. 17A, 17B, and 18, the cylindrical 
portion 211 of the pouring spout 208 protrudes from the hole formed on the 
side surface 202b of the carton 202. The flange 212 is adhered to the 
inner surface of the inner bag 203 adhered on the inner surfaces of the 
carton 202. Thus, when the pouring spout 208 is mounted, the passage 
member 215 can be aligned along the side surface 202b of the carton 202. 
As described above, since the passage member 215 is formed substantially 
in a H-letter shape, as the content is discharged from the inner bag 203, 
the moving portion of the inner bag 203 is moved to the side surface 202b. 
At this point, the second flat plate member 215c of the passage member 215 
can hold the inner bag 203, thereby securing the passage of the pouring 
spout 208 to the hole 211b. In FIGS. 19 and 20, the pouring spout 208 has 
protrusions 216 which are spaced so as to secure the passage from the 
passage member 215 to the hole 211b. In this embodiment, the pouring spout 
208 has one passage member 215. However, when necessary, a plurality of 
passage members may be disposed. 
In this embodiment, the construction of the cap 209 is not limited to that 
shown in FIG. 21. Instead, a cap having a plug which closes the hole 211b 
of the pouring spout 208 may be used. Normally, the pouring spout 208 and 
the cap 209 can be formed of resin. 
Next, the production method of the BIC 201 will be described. 
As shown in FIG. 22A, a carton blank 202' where a card board has been 
blanked in a predetermined shape is prepared so as to form the carton. In 
addition, a cylindrically adhered film 203' is prepared. The cylindrically 
adhered film 203' is formed by sealing both the ends of a film and then by 
cutting it in a predetermined length. (In the later step, the upper and 
lower ends of the cylindrically adhered film 203' will be sealed so as to 
form the inner bag.) The cylindrically adhered film 203' is not limited to 
that shown in FIG. 22A. The cylindrically adhered film 203' may be formed 
by layering two films and sealing both the ends thereof. 
Next, a paste (for example, an emulsion) 220 is applied to panels 202a' and 
202b' of the carton blank 202' (according to the surfaces 202a and 202b of 
the carton 202). Since the paste 220 is applied while the carton blank 
202' is being conveyed in the arrow direction of the figure, the paste 220 
is applied in a straight line pattern as shown in FIG. 22A. In addition, 
the paste 220 is applied to the rear surface of a paste-up margin 202g'. 
The paste positions and paste pattern are not limited to those shown in 
the figure. Instead, they may be properly modified. For example, the paste 
220 may be applied in a spot pattern. 
Next, the cylindrically adhered film 203' is adhered to the carton blank 
202' by the paste 220. The adhered state of the cylindrically adhered film 
203' to the carton blank 202' is shown in FIG. 23A. Next, as shown in FIG. 
23B, the panels 202b' and 202d' of the carton blank 202' (according to the 
surfaces 202b and 202d of the carton 202) are folded and then adhered to 
each other. Thus, a flat BIC 201' which has not been assembled is formed. 
The flat BIC 201' is conveyed to an assembling and charging step. In this 
step, as shown in FIG. 24, the BIC 201' is shaped in a square pillar shape 
and then blanked for the pouring spout. The pouring spout 208 is mounted 
on the BIC 201'. The cylindrical portion 211 of the pouring spout 208 is 
inserted into the hole for the pouring spout from the inside of the 
cylindrically adhered film 203'. The flange 212 is adhered to the inner 
surface of the flange 212 by an ultrasonic sealing process or the like. 
After the pouring spout 208 is mounted, the lower end of the cylindrically 
adhered film 203' is sealed. The lower end of the carton blank 202' is 
assembled. The lapper end of the cylindrically adhered film 203' is sealed 
and then the upper end of the carton blank 202' is assembled. Thus, as 
shown in FIG. 18, the BIC 201 where the inner bag 203 has been contained 
in the carton 202 has been assembled. Since these steps are performed by 
the conventional BIC producing technique, for the sake of the simplicity, 
the production facility and so forth for the BIC 201 are omitted. Last, 
the inner bag 203 is deaerated through the pouring spout 208 and then the 
BIC 201 is charged with the content 204 such as an ink. Thus, the state as 
shown in FIG. 17A takes place. 
When the BIC 201 which has been charged with the content 204 is-used, as 
shown in FIG. 18, the BIC 201 is set to a machine (such as a printer) in a 
nearly upright style. A connector of a sucking device of the machine (not 
shown) is connected to the pouring spout 208 so as to discharge the 
content 204. At this point, since the portion of the inner bag 203 
surrounded by the diagonal line X--X and the side surfaces 202a and 202d 
is the movable portion which is not fixed to the inner surfaces of the 
carton 202, as the content is discharged, the moving portion is deformed 
as shown by the chain double-dashed lines 222a, 222b, 222c, etc. of FIG. 
17B. Thus, without necessary of charging the inner bag with air, the 
content is discharged. Last, the movable portion of the inner bag 203 is 
injected into the fixed portion thereof. Thus, almost all the content can 
be discharged from the inner bag 203. 
Since the volume of the movable portion of the inner bag 203 is almost the 
half of the entire volume of the inner bag 203, when the movable portion 
goes into the fixed portion, just after the content is discharged, the 
movable portion almost never comes in contact with the fixed portion in 
the vicinity of the pouring spout 208, thereby preventing the content from 
being closed. In addition, since the pouring spout 208 is disposed in the 
vicinity of the edge of the fixed portion of the inner bag 203, the 
movable portion of the inner bag 203 is moved to the position of the 
pouring spout 208 at last. Thus, almost all the content can be discharged 
from the inner bag 203. In addition, since the pouring spout 208 according 
to this embodiment has the plurality of cylindrical protruding portions 
213 which extends to the inside of the inner bag 203 and is integrally 
formed with the passage member 215, the protruding portions 213 and the 
passage member 215 can hold the inner bag 203 which is moved to the 
pouring spout 208 as the content is discharged, thereby securing the 
passage of the liquid. Thus, almost all the content can be much smoothly 
discharged. 
In the above-described embodiment, the BIC 201 was set to a machine in an 
upright style and the content was discharged from the pouring spout 208 
disposed at the lower end on the front surface 202b. However, the 
discharging of the content is not limited to such a manner. Instead, the 
discharging method can be changed corresponding to the machine to which 
the BIC 201 is set. For example, the side surface 202b having the pouring 
spout 208 may be placed down so that the pouring spout 208 faces downward. 
In this case, it is not necessary to disposed the pouring spout 208 at the 
lower end of the side surface 202b as shown in the figure. 
In this embodiment, the pouring spout 208 and the passage member 215 were 
integrally formed. However, the passage member 215 may be independently 
formed. Thus, the pouring spout 208 and the passage member 215 may be 
independently disposed to the inner bag. In addition, when the length of 
the side surface 202b on which the pouring spout 208 is mounted not so 
long, the passage member 215 may be omitted. 
As described above, in the bag-in-carton (BIC), the cylindrically adhered 
film which forms the inner bag is adhered to the carton blank. The carton 
blank is adhered in a box shape. Both the upper and lower ends of the 
cylindrically adhered film are sealed. Both the lower and upper ends of 
the carton blank are assembled. Thus, the BIC is formed. Consequently, the 
BIC according to the third embodiment can be inexpensively produced as 
with the conventional BIC. In addition, since the BIC is dually formed of 
the inner bag and the carton, the content can be securely protected. In 
addition, in this embodiment, since the inner bag in the carton is adhered 
and fixed to two adjacent surfaces of the carton and the pouring spout is 
mounted on one of these surfaces, the portion of the inner bag disposed on 
the pouring spout side is a fixed portion which is fixed to the inner 
surfaces of the carton. On the other hand, the other portion of the inner 
bag is a movable portion. Thus while the movable portion goes into the 
fixed portion, almost all the content can be discharged from the pouring 
spout. Consequently, the BIC according to the modification can be 
effectively used for a packaging carton for a high-viscosity liquid and a 
liquid which is adversely affected by air. 
Fourth Embodiment 
Next, a fourth embodiment of the present invention will be described. 
FIGS. 25A and 25B are schematic sectional views showing a bag-in-carton 
(BIC) according to a fourth embodiment of the present invention. FIG. 25A 
shows the state of the BIC which has been charged with its content, 
whereas FIG. 25B shows the state of the BIC whose content has been 
discharged. FIG. 26 is a schematic perspective view showing the BIC. In 
FIGS. 25A, 25B, and 26, reference numeral 301 is the BIC according to the 
fourth embodiment. The BIC 301 is composed of a carton 302 and a flexible 
inner bag 303 contained therein. The carton 302 forms an outer vessel. The 
inner bag 303 contains a content 304 which is a liquid such as an ink. The 
carton 302 is formed in a rectangularly parallelopiped shape where one end 
surface has an inclined surface. In other words, the carton 302 has four 
side surfaces 302a, 302b, 302c, and 302d, two end surfaces 302e and 302f, 
and one inclined surface 302g (disposed between the side surface 302a and 
the end surface 302f). 
A pouring spout 305 is disposed on the inclined surface 302g of the carton 
302. The pouring spout 305 pierces through the inner bag 303. The pouring 
spout 305 is closed by a cap 306. The pouring spout 305 has a plurality of 
cylindrical protruding portions 305a extending to the inside of the inner 
bag 303. A groove-shaped passage 305b is formed on a side surface of each 
of the cylindrical protruding portions 305a. The passages 305b allow the 
liquid to pass. Since the passages 305b are formed, even if the end of the 
protruding portion 305a is blocked by the inner bag 303, the content 304 
can be discharged through the pouring spout 305. The pouring spout 305 is 
protruded from the carton 302 so that the cap 306 is placed in the area 
defined by the extended planes of the side surface 302a and the end 
surface 302f. Thus, a large number of the BICs 301 can be placed in a row 
and stacked. 
The inner bag 303 is partially adhered and fixed to the inner surfaces of 
the carton 302. The inner bag 303 is divided by a chain double-dashed line 
308 shown in FIG. 25A and 26. The portion of the inner bag 303 disposed on 
the pouring spout side is a fixed portion, whereas the portion on the 
opposite side is a movable portion. The position of the chain 
double-dashed line 308 which is the boundary of the fixed portion and 
movable portion of the inner bag 303 is defined so that the inner bag 303 
is divided into two equal portions. The position of the chain 
double-dashed line 308 is preferably defined so that the movable portion 
of the inner bag 303 is slightly smaller than the fixed portion of the 
inner bag 303. In this embodiment, as shown in FIGS. 25A and 25B, when the 
BIC 301 is placed in such a way that the pouring spout 305 faces downward, 
the chain double-dashed line 308 which divides the inner bag 303 into the 
movable portion and the fixed portion is defined so that the side surface 
302d (and the side surface 302b (FIG. 26) are divided by two at the center 
thereof, that the area on the pouring spout side is slightly larger than 
that on the other side, and that the length between the upper end of the 
chain double-dashed line and the upper end of the side surface 302f is 
smaller than that between the lower end of the chain double-dashed line 
and the lower end of the side surface 302f. Practically, the distance d1 
between the upper end of the chain double-dashed line 308 and the upper 
end of the end surface 302f is 1/2 of the distance d between the side 
surfaces 302e and 302f or slightly larger than that by around 1 to 10 mm. 
The distance d2 between the lower end of the chain double-dashed line 308 
and the lower end of the side surface 302f is slightly larger than the 
length d1 by around 1 to 15 mm. In this construction, when the content is 
discharged, the movable portion of the inner bag 303 can properly go into 
the fixed portion thereof. In addition, just after the content is 
discharged, the moving portion never approaches to the pouring spout 305. 
Thus, almost all the content can be discharged from the inner bag 303. 
Normally, the fixed portion of the inner bag 303 is partially adhered and 
fixed to the inner surfaces of the carton 302. However, the inner bag 303 
is not necessarily adhered to all the inner surfaces of the carton 302 
corresponding to the side surfaces 302a to 302d, the end surface 302f, and 
the inclined surface 302g. Instead, according to this embodiment, the 
inner bag 303 is adhered to the inner surfaces of the carton 302 
corresponding to the side surfaces 302a, 302b, 302c, and the inclined 
surface 302g. In FIG. 26, reference numeral 309 shows paste areas at which 
a paste is applied on the inner surfaces of the carton 302. Thus, almost 
half of the inner bag 303 on the pouring spout side is fixed to the inner 
surfaces of the carton. The other portion of the inner bag 303 is not 
fixed to the inner surfaces of the carton, but freely movable. In this 
embodiment, as shown in FIG. 26, there are a plurality of strip paste 
areas 309. However, the positions and number of the paste areas 309 may be 
changed. Moreover, instead of strip paste areas, spot paste areas may be 
disposed. 
Next, the production method of the BIC 301 will be described. 
As shown in FIG. 27A, a carton blank 302' where a card board has been 
blanked in a predetermined shape is prepared so as to form the carton. The 
inner bag 303 is adhered to upper areas (defined by a chain double-dashed 
line 308) of panels 302a', 302b', and 302d' of the carton blank 302' 
(corresponding to the side surfaces 302a, 302b, and 302d of the carton 
302). In addition, a cylindrically adhered film 303' is prepared. The 
cylindrically adhered film 303' is formed by sealing both the ends of a 
film and then by cutting it in a predetermined length. (In the later step, 
the upper and lower ends of the cylindrically adhered film 303' will be 
sealed so as to form the inner bag.) The cylindrically adhered film 303' 
is not limited to that shown in FIG. 27B. The cylindrically adhered film 
303' may be formed by layering two films and sealing both the ends 
thereof. 
Next, a paste (for example, an emulsion) 309 is applied to panels 302a', 
302b', and 302d' of the carton blank 302', a panel 302g (corresponding to 
the inclined surface 302g of the carton 302), and a paste-up area 302j'. 
Since the paste 309 is applied while the carton blank 302' is being 
conveyed in the arrow direction of the figure, the paste 309 is applied in 
a straight line pattern as shown in FIG. 27A. The triangular panels 302h' 
and 302i' of the carton blank 302' are inwardly folded, when the carton is 
assembled. Thus, the paste 309 is applied to one of the triangular panels 
302h' and 302i' of the carton blank 302'. In addition, the paste 309 is 
applied to the rear surface of a paste-up margin 302j'. 
Next, as shown in FIG. 28, the cylindrically adhered film 303' is adhered 
to the panels 302a' and 302d' of the carton blank 302' by the paste 309. 
The panels 302b' and 302c' of the carton blank 302' are folded and then 
adhered to each other. In addition, the panel 302b' and the paste-up area 
302j' are adhered to the cylindrically adhered film 303'. Thus, a flat BIC 
301' which has not been assembled is formed. 
The flat BIC 301' is conveyed to an assembling and charging step. In this 
step, the BIC 301' is shaped in a square pillar shape and then blanked for 
the pouring spout. The pouring spout 305 is mounted on the BIC 301'. After 
the pouring spout 305 is mounted, the lower end of the cylindrically 
adhered film 303' is sealed. The lower end of the carton blank 302' is 
assembled. The upper end of the cylindrically adhered film 303' is sealed 
and then the upper end of the carton blank 302' is assembled. Thus, the 
BIC 301 where the inner bag 303 has been contained in the carton 302 has 
been assembled. Since these steps are performed by the conventional BIC 
producing technique for the sake of the simplicity, the production 
facility and so forth for the BIC 301 are omitted. Last, the inner bag 303 
is deaerated through the pouring spout 305 and then the BIC 301 is charged 
with the content 304 such as an ink. Thus, the state as shown in FIG. 25A 
takes place. 
When the BIC 301 which has been charged with the content 304 is used, as 
shown in FIGS. 25A and 25B, the BIC 301 is set to a machine (such as a 
printer) in such a way that the pouring spout 305 faces downward. A 
connector of a sucking device of the machine (not shown) is connected to 
the pouring spout 305 so as to discharge the content 304. At this point, 
since the movable portion of the inner bag 303 which is disposed on the 
opposite side of the pouring spout side is not fixed to the inner surfaces 
of the carton 302, as the content is discharged, the moving portion is 
deformed as shown by the chain double-dashed lines 311a, 311b, etc. of 
FIG. 25A. Thus, without necessary of charging the inner bag with air, the 
content is discharged. Last, the movable portion of the inner bag 303 is 
injected into the fixed portion thereof. Thus, almost all the content can 
be discharged from the inner bag. 
Since the movable portion of the inner bag 303 is slightly smaller than the 
fixed portion thereof adhered to the inner surfaces of the carton, when 
the movable portion goes into the fixed portion, the movable portion 
almost never comes in contact with the fixed portion, thereby preventing 
the content from being closed. In addition, the boundary (defined by the 
chain double-dashed line 308) between the movable portion and fixed 
portion of the inner bag 303 is slightly inclined so that the distance 
between the upper end of the boundary and the upper end of the surface 
having the pouring spout 305 is smaller than the distance between the 
lower end of the boundary and the lower end of the surface having the 
pouring spout 305, just after the content is discharged, the lower end of 
the moving portion Of the inner bag 303 almost never approaches to the 
pouring spout 305, thereby preventing the passage of the content from 
being blocked. Thus, almost all the content can be discharged. To prevent 
the movable portion of the inner bag 303 from blocking the pouring spout 
305, the moving portion is preferably as apart from the pouring spout 305 
as possible. However, since the content tends to reside at the bottom of 
the inner bag 303, the area of the lower portion of the inner bag 303 is 
preferably as small as possible. From this point of view, the lower end of 
the boundary is preferably defined as close to the pouring spout 305 as 
possible. This embodiment satisfies both the requirements. 
In the above-described embodiment, the pouring spout 305 had the 
cylindrical portion 305a which extends to the inside of the inner bag 303. 
However, the pouring spout 305 is not limited to such a construction. 
Instead, a conventional pouring spout which does not have a cylindrical 
portion may be used. In addition, a passage member which secures the 
passage of the content upon the movement of the movable portion of the 
inner bag 303 into the fixed portion thereof may be disposed at the bottom 
of the inner bag 303. An example of this passage member is an 
H-letter-shaped rod member. 
In the above-described embodiment, when the content is discharged, the BIC 
301 is set to the machine in such a way that the pouring spout faces 
downward. However, when the content is discharged from the BIC 301, the 
pouring spout may be disposed in any position (such as up or side) 
corresponding to the machine to which the BIC 301 is set. When the BIC 301 
is set to the machine so that the pouring spout faces upward, the dropping 
of the content from the pouring spout can be prevented. 
As described above, in the bag-in-carton (BIC), the cylindrically adhered 
film which forms the inner bag is adhered to the carton blank. The carton 
blank is adhered in a box shape. Both the upper and lower ends of the 
cylindrically adhered film are sealed. Both the lower and upper ends of 
the carton blank are assembled. Thus, the BIC is formed. Consequently, the 
BIC according to the fourth embodiment can be inexpensively produced as 
with the conventional BIC. In addition, since the BIC is dually formed of 
the inner bag and the carton, the content can be securely protected. 
Moreover, according to this embodiment, since a part of the end surfaces 
of the carton is an inclined surface and a pouring spout is disposed 
thereon, when the BICs are placed in a row or stacked, their pouring 
spouts do not obstructively extrude. Thus, a large number of BICs can be 
compactly placed in a row. In addition, in this embodiment, since the 
inner bag has a fixed portion and a movable portion, the fixed portion is 
adhered and fixed to the inner surfaces of the carton corresponding to the 
surface having the pouring spout. Thus, while the movable portion goes 
into the fixed portion, almost all the content can be discharged through 
the pouring spout. Consequently, the BIC according to this embodiment can 
be effectively used for a packaging carton for a high-viscosity liquid and 
a liquid which is adversely affected by air. 
Fifth Embodiment 
Next, a fifth embodiment of the present invention will be described. 
FIGS. 30A and 30B are schematic sectional views showing a bag-in-carton 
(BIC) according to a fifth embodiment of the present invention. FIG. 30A 
shows the state of the BIC which has been charged with its content, 
whereas FIG. 30B shows the state of the BIC whose content has been 
discharged. FIG. 31A is a schematic perspective view showing the BIC. FIG. 
31B is a schematic perspective view showing the BIC with its bottom 
surface up. In FIGS. 30A,, 30B, 31A, and 31B, reference numeral 401 is the 
BIC according to the fifth embodiment. The BIC 301 is composed of a carton 
402 and a flexible inner bag 403 contained therein. The carton 402 forms 
an outer vessel. The inner bag 403 contains a content 404 which is a 
liquid such as an ink. 
The carton 402 is formed in a rectangularly parallelopiped shaped and has a 
front surface 402a, side surfaces 402b and 402c, an upper surface 402d, a 
lower surface 402e, and a rear surface 402f. The carton 402 is formed of a 
carton blank 402' shown in FIGS. 32A and 32B. The front surface 402a, the 
side surfaces 402b and 402c, and the rear surface 402f are formed of 
panels 402a', 402b', 402c', and 402f' of the carton blank 402', 
respectively. The upper surface 402d and the lower surface 402e are formed 
of main flaps 402d' and 402e' of the carton blank 402', respectively. In 
addition, the carton blank 402' has side flaps 402g and 402h disposed 
above and below the panel 402a' which forms the front surface 402a of the 
carton 402. As shown in FIGS. 30A and 30B, the side flaps 402g and 402h 
are nonadhesively placed inside the upper surface 402d and the lower 
surface 402e of the carton 402, respectively. Thus, the side flaps 402g 
and 402h are rotatable about the upper and lower ends of the front surface 
402a, respectively. 
A pouring spout 405 is disposed at the lower end of the front surface 402a 
of the carton 402. The pouring spout 405 pierces through the inner bag 
403. The pouring spout 405 is closed by a cap 406. The pouring spout 405 
has a cylindrical portion 405a which extends to the inside of the inner 
bag 403. A groove-shaped passage 405b which allows the liquid to pass is 
formed on a side surface of the cylindrical portion 405a. Since the 
passage 405b is provided, even if the forward end of the cylindrical 
portion is blocked by the inner bag 403, the content 404 can be discharged 
through the pouring spout 405. 
The inner bag 403 is partially adhered and fixed to the inner surfaces of 
the carton 402. The portion of the inner bag 403 which is fixed to the 
inner surfaces of the carton 402 is a fixed portion which is a area shown 
by hatched lines of FIGS. 30A, 30B, 31A, and 31B. In other words, the 
fixed portion of the inner bag 403 consists of parts 409a, 409b, and 409c. 
The part 409a is almost all the area of the front surface 402a of the 
carton 402. The parts 409b and 409c are trapezoidal-areas of the side 
surfaces 402b and 402c, respectively. The upper side of each trapezoidal 
area is disposed nearly at the center of each of the side surfaces 402b 
and 402c, whereas the lower side thereof is disposed in the vicinity of 
the end of each of the side surfaces 402b and 402c on the front surface 
side. The inner bag 403 is adhered to the part 409d which faces the side 
flap 402h on the pouring spout side. Thus, the inner bag 403 is fixed to 
the inner surfaces of the carton 402 through the parts 409a, 409b, and 
409c. The portion of the inner bag 403 which is fixed at these parts 409a, 
409b, and 409c is not moved. However, the other portion (which is almost 
the half) of the inner bag 403 on the opposite side of the pouring spout 
side is a movable portion which can be freely moved. The portion of the 
inner bag 403 which faces the side flap 402h is fixed thereto. However, 
since the side flap 402h is rotatable about the lower end of the front 
surface 402a, this portion is movable along with the side flap 402h. 
Next, the production method of the BIC 401 will be described. 
As shown in FIGS. 32A and 32B, a carton blank 402' where a card board has 
been blanked in a predetermined shape is prepared so as to form the 
carton. In addition, a cylindrically adhered film 403' is prepared. The 
cylindrically adhered film 403' is formed by sealing both the ends of a 
film and then by cutting it in a predetermined length. (In the later step, 
the upper and lower ends of the cylindrically adhered film 403' will be 
sealed so as to form the inner bag.) The cylindrically adhered film 403' 
is not limited to that shown in the figure. The cylindrically adhered film 
403' may be formed by layering two films and sealing both the ends 
thereof. 
Next, a paste (for example, an emulsion) is applied to areas 409a', 409b', 
and 409d' of the inner surfaces of the carton blank 402'. These areas are 
shown by hatched lines of the figure. Next, as shown in FIG. 33A, the 
cylindrically adhered film 403' is adhered to the paste areas 409a' and 
409b'. The panels 402c' and 402f' of the carton blank 402' are folded and 
then adhered to each other. In addition, the panel 402b' is adhered to the 
cylindrically adhered film 403'. Thus, a flat BIC 401' which has not been 
assembled is formed. 
The flat BIC 401' is conveyed to an assembling and charging step. In this 
step, the BIC 401' is shaped in a square pillar shape and then blanked for 
the pouring spout. The pouring spout 405 is mounted on the BIC 401'. 
Thereafter, the lower end of the cylindrically adhered film 403' is sealed 
and closed as shown in FIGS. 34A to 34D. (In FIGS. 34A to 34D, for the 
sake of simplicity, the carton is omitted.) In other words, as shown in 
FIG. 34A, the end portion of the cylindrically adhered film 403' which is 
open in an angularly cylindrical shape is closed as shown in FIG. 34B. The 
end portion is horizontally sealed. Thus, a first seal portion 410 is 
formed. As shown in FIG. 34C, this portion is flatly pressed so as to form 
two triangular flaps 411. The lower side portions of the triangular flaps 
411 are sealed so as to form two second seal portions 412. As shown in 
FIG. 34D, the triangular flaps 411 are inwardly folded. Thus, the end 
portion of the cylindrically adhered film 403' has been sealed and 
assembled in a box shape. Since the second seal portions 412 have been 
formed at the lower side portions of the triangular flaps 411, the content 
is never closed in the triangular flaps 411. Thus, when the content is 
discharged, the remainder thereof does not increase. In addition, since 
the second seal portions 412 have reinforcement effect, they serve to keep 
the inner bag 403 in a nearly rectangularly parallelopiped shape. Thus, 
when the content is discharged, the second seal portions 412 allow the 
inner bag to be equally deformed. 
After the lower end of the cylindrically adhered film 403' is sealed, the 
lower end of the carton blank 402' is assembled. At this point, the lower 
portion of the inner bag 403 is adhered to the part 409d of the side flap 
402h disposed at the inner surface of the bottom of the carton 402 by a 
proper adhesive means (such as a hot melt adhesive agent) (see FIGS. 31A 
and 31B). The upper end of the cylindrically adhered film 403' is sealed 
and then the upper end of the carton blank 402' is assembled. Thus, the 
BIC 401 where the inner bag 403 has been contained in the carton 402 has 
been assembled. Since these steps are performed by the conventional BIC 
producing technique for the sake of the simplicity, the production 
facility and so forth for the BIC 401 are omitted. Last, the inner bag 403 
is deaerated through the pouring spout 405 and then the BIC 401 is charged 
with the content 404 such as an ink. Thus, the state as shown in FIG. 30A 
takes place. 
When the BIC 401 which has been charged with the content 404 is used, as 
shown in FIGS. 30A and 30B, the BIC 401 is set to a machine (such as a 
printer) in a nearly upright style. A connector of a sucking device of the 
machine (not shown) is connected to the pouring spout 405 so as to 
discharge the content 404. At this point, since the movable portion of the 
inner bag 403 which is disposed on the opposite side of the pouring spout 
side is not fixed to the inner surfaces of the carton 302, as the content 
is discharged, the moving portion is deformed as shown by the chain 
double-dashed lines 415a, 415b, 415c, etc. of FIG. 30B. Thus, without 
necessary of charging the inner bag with air, the content is discharged. 
Last, the movable portion of the inner bag 403 is injected into the fixed 
portion thereof. Thus, almost all the content can be discharged from the 
inner bag. 
Since the fixed portions 409b and 409c which fix the inner bag 403 to the 
side surfaces 402b an 402c of the carton 402 are trapezoidal portions 
whose lower side is present in the vicinity of the edge line on the front 
surface, the upper and lower portions (including the upper surface and the 
lower surface of the inner bag) of the inner bag 403 are movable. Thus, 
when the content 404 is discharged, the upper surface and the lower 
surface of the inner bag 403 are moved in such a way that they are 
inwardly inclined as shown in FIG. 30B. Thus, since the volume of the 
inner bag 403 can be further decreased, the remainder thereof can be 
decreased. In particular, since the lower surface of the inner bag 403 is 
raised, the content which tends to reside at the bottom of the inner bag 
403 can be effectively discharged. Thus, the remainder of the content 404 
can be decreased. Moreover, since the lower surface of the inner bag 403 
is fixed to the side flap 402h, the inner bag 403 is kept in a nearly flat 
shape and moved along with the side flap 402h. Therefore, before the 
content is enough discharged, the lower surface of the inner bag 403 never 
deforms, thereby preventing it from blocking the pouring spout 405. 
Consequently, since the content is stably discharged, the deviation of the 
remainder of each BIC can be reduced. The inclination angles .alpha. and 
.beta. of the sides of the trapezoidal fixed portions 409b and 409c to the 
side surfaces 402b and 402c of the carton 402 are preferably around 10 to 
25 degrees (see FIGS. 30A, 30B, 31A, and 31B). The upper inclination angle 
.alpha. is more preferably in the range from 15 to 20 degrees, whereas the 
lower inclination angle .beta. is more preferably in the range from 10 to 
15 degrees. 
A large number of BIC 401 which were used as ink vessels each of which 
contained an ink of 500 grams were experimented. The remainder of the ink 
was around 12 grams and at most 16 grams in average. This reveals that in 
the BIC according to this embodiment, the content can be stably 
discharged. On the other hand, in the case that the lower surface of the 
inner bag 403 was not adhered to the side flap 402h and the inner bag 403 
was freely movable, the remainder of the content was 15 grams in average. 
In addition, the remainder of this construction was sometimes very large 
(for example, 70 to 80 grams). When the inner bag 403 was not fixed to the 
side surfaces 402b and 402c in the trapezoidal shape, but to a half area 
on the pouring spout, the remainder of the content was as many as 20 to 30 
grams in average. In addition, the remainder of this construction was 
sometimes very large (for example, around 100 grams). Thus, in the 
construction according to this embodiment, the remainder of the content 
could be decreased and the deviation thereof could be reduced. 
In the above-described embodiment, as shown in FIGS. 33A and 33B, since the 
inner bag 403 was fixed to the part 409a which was almost all the area of 
the front surface 402a of the carton 402 and the trapezoidal parts 409b 
and 409c of the side surfaces 402b and 402c, a paste was applied to all 
the area corresponding to these parts. However, this embodiment is not 
limited to this construction. Instead, the portions of the inner bag 
corresponding to the parts 409a, 409b, and 409c may be merely fixed to the 
carton. Thus, the inner bag 403 may be adhered to the peripheral portions 
of the parts 409a, 409b, and 409c in a spot pattern or a strip pattern. In 
addition, in the above-described embodiment, the pouring spout 405 had the 
cylindrical portion 405a extending to the inside of the inner bag 403. 
However, in this embodiment, the pouring spout 405 is not limited to such 
a construction. Instead, a normal pouring spout which does not have such a 
cylindrical portion may be used. 
In the above-described embodiment, the BIC 401 was set to a machine in an 
upright style and the content was discharged from the pouring spout 
disposed at the lower end on the front surface. However, the discharging 
of the content is not limited to such a manner. Instead, the discharging 
method can be changed corresponding to the machine to which the BIC is 
set. For example, the front surface having the pouring spout may be placed 
down so that the pouring spout faces downward. In this case, it is not 
necessary to disposed the pouring spout at the lower end of the front 
surface as shown in the figure. 
As described above, in the bag-in-carton (BIC), the cylindrically adhered 
film which forms the inner bag is adhered to the carton blank. The carton 
blank is adhered in a box shape. Both the upper and lower ends of the 
cylindrically adhered film are sealed. Both the lower and upper ends of 
the carton blank are assembled. Thus, the BIC is formed. Consequently, the 
BIC according to the fifth embodiment can be inexpensively produced as 
with the conventional BIC. In addition, since the BIC is dually formed of 
the inner bag and the carton, the content can be securely protected. 
Moreover, according to this embodiment, the inner bag of the carton is 
adhered and fixed both to trapezoidal portions of the side surfaces on the 
pouring spout side and to the side flap on the pouring spout side, the 
movable portion of the inner bag is stably deformed as the content is 
discharged. Thus, the movable portion can go into the fixed portion. 
Therefore, since almost all the content can be stably discharged, the 
remainder thereof can be decreased and the deviation thereof can be 
reduced. Consequently, the BIC according to this embodiment can be 
effectively used for a packaging carton for a high-viscosity liquid and a 
liquid which is adversely affected by air. 
According to this embodiment, since the lower side portions of the 
triangular flaps formed on both sides of the upper and lower ends of the 
inner bag of the carton are sealed, the content is never closed in the 
triangular flaps. Thus, the remainder of the content can be decreased. In 
addition, the seal portions serve to keep the inner bag in a nearly 
rectangularly parallelopiped shape. Thus, when the content is discharged, 
the inner bag can be equally deformed. Therefore, the remainder of the 
content can be decreased and the deviation thereof can be reduced. 
Consequently, the BIC according to this embodiment can be effectively used 
for a packaging carton for a high-viscosity liquid and a liquid which is 
adversely affected by air. 
Sixth Embodiment 
Next, a sixth embodiment of the present invention will be described. 
FIGS. 35A and 35B are schematic sectional views showing a bag-in-carton 
(BIC) according to a sixth embodiment of the present invention. FIG. 35A 
shows the state of the BIC which has been charged with its content, 
whereas FIG. 35B shows the state of the BIC whose content has been 
discharged. FIG. 36 is a schematic perspective view showing the BIC. In 
FIGS. 35A, 35B, and 36, reference numeral 501 is the BIC according to the 
fifth embodiment. The BIC 501 is composed of a carton 502 and a flexible 
inner bag 503 contained therein. The carton 502 forms an outer vessel. The 
inner bag 503 contains a content 504 which is a liquid such as an ink. The 
carton 502 is rectangularly parallelopiped and has six rectangular 
surfaces which are four side surfaces 502a, 502b, 502c, 502d and two end 
surfaces 502e and 502f, each of which is plane. 
The inner bag 503 is partially adhered and fixed to the inner surfaces of 
the carton 502. The fixed portions of the inner bag 503 are portions 
according to the two adjacent side surfaces 502b and 502c of the carton 
502. However, it is not necessary to fully adhere the inner bag 503 to the 
side surfaces 502b and 502c. Instead, the inner bag 503 is partially 
adhered to the side surfaces 502b and 502c in such a way that almost all 
the areas of the inner bag 503 corresponding to the side surfaces 502b and 
502c are not moved. In this embodiment, the inner bag 503 is adhered to 
areas shown by hatched lines of FIG. 36. The areas of the inner bag 503 
according to the other surfaces 502a, 502d, 502e, and 502f of the carton 
502 are not adhered to the inner surfaces of the carton 502. Now, assume 
that the inner bag 503 is divided by a diagonal line X--X into a first 
portion on the side surfaces 502b and 502c and a second portion on the 
side surfaces 502a and 502d. The first portion on the side surfaces 502b 
and 502c becomes a fixed portion which is fixed to the inner surfaces of 
the carton 502, whereas the second portion on the side surfaces 502a and 
502b becomes a movable portion. Areas of the inner bag 503 according to 
the end surfaces 502e and 502f on the side of the first portion may be 
adhered thereto when necessary. 
A pouring spout 508 is disposed on the side surface 502b. The pouring spout 
508 pierces through the inner bag 503. The pouring spout 508 is closed by 
a cap 509. In this embodiment, the position of the pouring spout 508 on 
the side surface 502b is not limited. However, the pouring spout 508 
should be disposed at a position close to the lower end of the side 
surface 502b and in the vicinity of the edge line where the side surfaces 
502b and 502c intersect to each other. 
As shown in FIGS. 37 and 38, the pouring spout 508 has a cylindrical 
portion 511 and a flange 512. The cylindrical portion 511 has a thread 
portion 511a and a through-hole 511b. The thread portion 511a is formed on 
the outer periphery of the cylindrical portion 511. The through-hole 511b 
pierces through the cylindrical portion 511a. The flange 512 is formed on 
the outer periphery of the cylindrical portion 511 and adapted to mount 
the inner bag. The cylindrical portion 511 is formed so that it is fitted 
to a connector of a machine such as a printer (not shown). The cylindrical 
portion 511 has a ring-shaped groove 511c. This groove 511c is formed so 
as to reduce the wall thickness of the cylindrical portion 511. The groove 
511c may be omitted. The pouring spout 508 also has a cylindrical 
extruding portion 513 which surrounds the through-hole 511b and extends to 
the inside of the inner bag 503 beyond the flange 512. A plurality of 
groove-shaped passages 514 which allow the liquid to pass are formed on 
the side surfaces of the protruding portion 513. Since the protruding 
portion 513 having the passages 514 is provided, when the content is 
discharged, even if the movable portion of the inner bag 503 is 
excessively approached to the pouring spout 508, the end of the protruding 
portion 513 can hold the inner bag 503, thereby securing the flow of the 
content to the hole 511b through the passages 514. 
The flange 512 of the pouring spout 508 has a thin H-letter-shaped passage 
member 515 which is integrally formed therewith and extends in the 
direction thereof. The passage member 515 has a first flat plate member 
515a, a rib 515b, and a second flat plate member 515c. The first flat 
plate member 515a is disposed on a plane extended from the flange 512. The 
rib 515b is disposed nearly at the center of the first flat plate member 
515a and perpendicular thereto. The second flat plate member 515c is 
disposed at the end of the rib 515b and in parallel with the first flat 
plate member 515a. A passage passing from the inner bag 503 to the hole 
511b of the cylindrical portion 511 is formed between the first flat plate 
member 515a and the second flat plate member 515c. As shown in FIGS. 35A, 
35B, and 36, the cylindrical portion 511 of the pouring spout 508 
protrudes from the hole formed on the side surface 502b of the carton 502. 
The flange 512 is adhered to the inner surface of the inner bag 503 
adhered on the inner surfaces of the carton 502. Thus, when the pouring 
spout 508 is mounted, the passage member 515 can be aligned along the side 
surface 502b of the carton 502. As described above, since the passage 
member 515 is formed substantially in a H-letter shape, as the content is 
discharged from the inner bag 503, the moving portion of the inner bag 503 
is moved to the side surface 502b. At this point, the second flat plate 
member 515c of the passage member 515 can hold the inner bag 503, thereby 
securing the passage of the pouring spout 508 to the hole 511b. In FIGS. 
37 and 38, the pouring spout 508 has protrusions 516 which are spaced so 
as to secure the passage from the passage member 515 to the hole 511b. In 
this embodiment, the pouring spout 508 has one passage member 515. 
However, when necessary, a plurality of passage members may be disposed. 
In this embodiment, the construction of the cap 509 is not limited to that 
shown in FIG. 21. Instead, a cap having a plug which closes the hole 511b 
of the pouring spout 508 may be used. Normally, the pouring spout 508 and 
the cap 509 can be formed of resin. 
Next, the production method of the BIC 501 will be described. 
As shown in FIGS. 40A and 40B, a carton blank 502' where a card board has 
been blanked in a predetermined shape is prepared so as to form the 
carton. In addition, a cylindrically adhered film 503' is prepared. The 
cylindrically adhered film 503' is formed by sealing both the ends of a 
film and then by cutting it in a predetermined length. (In the later step, 
the upper and lower ends of the cylindrically adhered film 503' will be 
sealed so as to form the inner bag.) The cylindrically adhered film 503' 
is not limited to that shown in FIG. 40B. The cylindrically adhered film 
503' may be formed by layering two films and sealing both the ends 
thereof. 
Next, a paste (for example, an emulsion) 520 is applied to panels 502b' and 
502c' of the carton blank 502' (according to the surfaces 502b and 502c of 
the carton 502). Since the paste 520 is applied while the carton blank 
502' is being conveyed in the arrow direction of the figure, the paste 520 
is applied in a straight line pattern as shown in FIG. 40A. In addition, 
the paste 520 is applied to the rear surface of a paste-up margin 502g'. 
Next the cylindrically adhered film 503' is adhered to the carton blank 
502' by the paste 520. The adhered state of the cylindrically adhered film 
503' to the carton blank 502' is shown in FIG. 41A. Next, as shown in FIG. 
41B, the panels 502a' and 502d' of the carton blank 502' (according to the 
surfaces 502a and 502d of the carton 502) are folded and then adhered to 
each other. Thus, a flat BIC 501' which has not been assembled is formed. 
The flat BIC 501' is conveyed to an assembling and charging step. In this 
step, as shown in FIG. 42, the BIC 501' is shaped in a square pillar shape 
and then blanked for the pouring spout. The pouring spout 508 is mounted 
on the BIC 501'. The cylindrical portion 511 of the pouring spout 508 is 
inserted into the hole for the pouring spout from the inside of the 
cylindrically adhered film 503'. The flange 512 is adhered to the inner 
surface of the flange 512 by an ultrasonic sealing process or the like. 
After the pouring spout 508 is mounted, the lower end of the cylindrically 
adhered film 503' is sealed. The lower end of the carton blank 502' is 
assembled. The upper end of the cylindrically adhered film 503' is sealed 
and then the upper end of the carton blank 502' is assembled. Thus, as 
shown in FIG. 36, the BIC 501 where the inner bag 503 has been contained 
in the carton 502 has been assembled. Since these steps are performed by 
the conventional BIC producing technique, for the sake of the simplicity, 
the production facility and so forth for the BIC 501 are omitted. Last, 
the inner bag 503 is deaerated through the pouring spout 508 and then the 
BIC 501 is charged with the content 504 such as an ink. Thus, the state as 
shown in FIG. 35A takes place. 
When the BIC 501 which has been charged with the content 504 is used, as 
shown in FIG. 36, the BIC 501 is set to a machine (such as a printer) in a 
nearly upright style. A connector of a sucking device of the machine (not 
shown) is connected to the pouring spout 508 so as to discharge the 
content 504. At this point, since the portion of the inner bag 503 
surrounded by the diagonal line X--X and the side surfaces 502a and 502d 
is the movable portion which is not fixed to the inner surfaces of the 
carton 502, as the content is discharged, the moving portion is deformed 
as shown by the chain double-dashed lines 522a, 522b, 522c, etc. of FIG. 
35B. Thus, without necessary of charging the inner bag with air, the 
content is discharged. Last, the movable portion of the inner bag 503 is 
injected into the fixed portion thereof. Thus, almost all the content can 
be discharged from the inner bag 503. 
Since the volume of the movable portion of the inner bag 503 is almost the 
half of all the volume of the inner bag 503, when the movable portion is 
injected into the fixed portion, just after the content is discharged, the 
movable portion almost never comes in contact with the fixed portion in 
the vicinity of the pouring spout 508, thereby preventing the content from 
being closed. In addition, since the pouring spout 508 is disposed in the 
vicinity of the edge of the fixed portion of the inner bag 503, the 
movable portion of the inner bag 503 is moved to the position of the 
pouring spout.508 at last. Thus, almost all the content can be discharged 
from the inner bag 503. In addition, since the pouring spout 508 according 
to this embodiment has the plurality of cylindrical protruding portions 
513 which extends to the inside of the inner bag 503 and is integrally 
formed with the passage member 515, the protruding portions 513 and the 
passage member 515 can hold the inner bag 503 which is moved to the 
pouring spout 508 as the content is discharged, thereby securing the 
passage of the liquid. Thus, almost all the content can be much smoothly 
discharged. 
In the above-described embodiment, the BIC 501 was set to a machine in an 
upright style and the content was discharged from the pouring spout 508 
disposed at the lower end on the front surface 502b. However, the 
discharging of the content is not limited to such a manner. Instead, the 
discharging method can be changed corresponding to the machine to which 
the BIC 501 is set. For example, the side surface 502b having the pouring 
spout 508 may be placed down so that the pouring spout 508 faces downward. 
In this case, it is not necessary to disposed the pouring spout 508 at the 
lower end of the side surface 502b as shown in the figure. 
In the above-mentioned embodiment, the pouring spout 508 was used in the 
BIC 501 where the inner bag 503 was adhered to the side surfaces 502b and 
502c of the carton 502 was described. However, the construction of the BIC 
to which the pouring spout is mounted is not limited to that described in 
the embodiment. Instead, the construction of the BIC may be changed. In 
addition, the pouring spout 508 may be used for a BIB rather than the BIC 
501. 
As described above, since the pouring spout according to this embodiment is 
integrally formed along with the passage member, they can be formed by one 
forming process. Thus, unlike with the conventional production method, the 
production cost can be reduced. In addition, when the pouring spout is 
mounted on the inner bag, the passage member can be aligned in the 
predetermined position. Thus, the mounting process can be simplified. When 
the BIC is used, the passage member is kept in the predetermined position 
of the hole of the pouring spout. Therefore, when the content is 
discharged from the inner bag through the pouring spout, even if part of 
the inner bag is moved to the passage member, it can hold the inner bag, 
thereby securing the passage of the liquid to the hole of the cylindrical 
portion. Thus, the content can be smoothly discharged from the inner bag 
and the remainder thereof can be decreased. 
Seventh Embodiment 
Next, with reference to FIGS. 43 to 45, a seventh embodiment of the present 
invention will be described. As shown in FIG. 43, a bag-in-carton (BIC) is 
produced in the following manner. First, a carton blank 602' is prepared. 
A paste (for example, an emulsion) 609 is applied to the upper portions of 
panels 602a', 602b', 602c', 602d', and 602g'. A cylindrically adhered film 
3' (see FIG. 3B) is adhered to the paste areas of the carton blank 602'. 
In this case, the carton blank 602' is a box-shaped carton 2 (see FIG. 1A) 
of the BIC. The cylindrically adhered film 3' is a flexible inner bag 3 of 
the BIC (see FIG. 1A). In FIG. 43, reference numeral 610 depicts the 
position of the pouring spout 5 (see FIG. 1A). A movable portion of the 
inner bag 3 can easily go into the fixed portion of the inner bag 3, as 
the inner bag 3 is fixed to the upper portions of panels 602a', 602b', 
602c' and 602d '. That is, if the inner bag 3 is fixed to only three 
panels 602a', 602b', and 602c', the portion of the inner bag 3 on the 
non-fixed panel 602d' may be a fixed portion and shut the pouring spout 5. 
Next, with reference to FIGS. 44 and 45, a modification of the seventh 
embodiment will be described. As shown in these figures, a BIC 651 is 
formed of a box-shaped carton 652 and a flexible inner bag 3 (see FIG. 1A) 
contained therein. The carton 652 is formed in a rectangularly 
parallelopiped shape and has six rectangular surfaces which are four side 
surfaces 652a, 652b, 652c, and 652d and two end surfaces 652e and 652f. 
The inner bag 3 is partially adhered and fixed to the inner surfaces of the 
carton 652.. In FIG. 45, reference numeral 656 is the fixed portion of the 
inner bag 3. Thus, the fixed portion 656 consists of all the area of the 
surface 652b, a trapezoidal area of the surface 652c, and all the area of 
the surface 652a. As shown in FIG. 44, the carton 652 is formed by 
assembling a carton blank 652'. The carton blank 652' has panels 652a', 
652b', 652c', 652e', and 652f' and a paste-up margin 652g'. A paste 670 is 
applied to the almost all the area of the panel 652b', a trapezoidal area 
of the panel 652c' and the paste-up margin 652g. Thus, the inner bag 3 is 
fixed to all the area of the surface 652b, the trapezoidal area of the 
surface 652c, and all the area of the surface 652a. In FIGS. 44 and 45, 
the pouring spout 658 is mounted to a pouring spout position 660. A 
passage member 665 is mounted on the pouring spout 658. In addition, a cap 
659 is mounted on the pouring spout 658. In FIG. 45, reference numeral 690 
is a boundary of the fixed portion and movable portion of the inner bag. 
As shown in FIGS. 44 and 45, the inner bag 3 adheres to the paste-up margin 
652g' at two points by the paste 670, and therefore is fixed to all the 
area of the panel 652a. Not only the carbon 652 but also the inner bag 3 
can be kept in a rectangularly parallelopiped shape during assembly 
because the inner bag 3 is fixed to all the area of the panel 652a. The 
inner bag 3 can not be loosened during mounting the pouring spout 5, and 
therefore the pouring spout 5 can be easily mounted. 
When a content within the inner bag 3 is sucked out, the inner bag 3 is 
detached at the two adherent points of the paste-up margin 652g'and then 
the movable portion of the inner bag 3 can easily go toward the pouring 
spout 5.