Paper products having perforations and perforate pattern

Paper products having perforations and perforate pattern for use in a blank of paper or synthetic paper and an envelope, or the like. The paper products comprises a paper, a vertical notch provided at upper end portion of the paper, and a plurality of Y shaped notches, which are provided in such a manner that first Y shaped notches have three notches, upper ends of upper opened two notches are positioned at the lower end of the notch on a horizontal line, and upper ends of upper opened two notches of second Y shaped notches are positioned at the lower end of the notch on a horizontal line, and so on until a lower end portion of the paper.

FIELD OF THE INVENTION 
The present invention relates to paper products having perforations and 
perforate patterns. 
BACKGROUND OF THE INVENTION 
Paper products means a blank of paper or synthetic paper and pouches such 
as envelopes made of such a paper or synthetic paper. 
Generally perforations made on a paper are separated; in order to finely 
separate these perforations, user first makes a fold on the paper by 
folding along the perforations. Then the edge portion of the perforations 
is separated by fingers of hands by about 1 cm, and finally, as shown in 
FIG. 8, both side portions of the perforations are held between forefinger 
and thumb of each finger of hands to twist the paper, thereby separating 
it into two parts. 
The above separating process can not obtain a rapid separating operation 
and causes large, troublesome time loss. Moreover, with such a separating 
process, distribution to force caused by fingers of hands becomes uneven 
so that paper is separated in the oblique direction which deviates from 
perforations, thereby damaging a content printed on the paper or a content 
enclosed in an envelope formed by such a paper. 
SUMMARY OF THE INVENTION 
It is an object of the present invention to overcome the above 
disadvantages of conventional paper products. 
It is another object of the present invention to provide economical 
products having perforations and perforate pattern. 
According to the present invention, there are provided paper products in 
which the above step of folding the perforations and the step of holding 
both side portions of the perforations between forefinger and thumb of 
respective fingers are omitted, thereby increasing workability; and the 
perforations of the paper can be separated. 
According to the present invention, there are provided paper products 
having perforations and perforate, pattern comprises a paper E, a vertical 
notch d provided at upper end portion of the paper, and a plurality of Y 
shaped notches, which are provided in such a manner that first Y shaped 
notches have three notches a, b and c, upper ends of upper-opened two 
notches a and b are positioned at the lower end of the notch d on a 
horizontal line x, and upper ends of upper-opened two notches a' and b' of 
second Y shaped notches are positioned at the lower end of the notch c' on 
a horizontal line, and so on until a lower end portion of the paper. 
Another embodiment of the present invention is paper products having 
perforations and perforate patterns comprising a paper E, notch e 
obliquely provided at upper end portion of the paper, a plurality of 
notches i, m, q, . . . provided downwards in parallel to the notch e with 
a given distance, and a plurality of notches h, l, p, . . . provided in 
oppositely oblique so as to interest an extension line of respective 
notches e, i, m, q, . . . at the center portion thereof, respectively, and 
so on, which are provided in such a manner that respective lower ends of 
the notches e, i, m, q, . . . and respective upper ends of the notches h, 
l, p, . . . are positioned on a horizontal line, and, perforations g, f, 
k, j, o, n, . . . are formed on respective extension lines of the notches 
e, i, m, . . . and between the lower end of first notch e and the upper 
end of following notches i, m, q, . . . . 
Other embodiments of the present invention, paper products having 
perforations and perforate patterns comprises a paper E, a notch e 
obliquely provided at upper end portion of the paper, a plurality of first 
notches i, m, q, . . . provided downwards parallel to the notch e with a 
given distance, and a plurality of notches h, l, p, . . . provided 
oppositely oblique so as to intersect an extension line of respective 
notches e, i, m, q, . . . at the center portion thereof, respectively, and 
so on, which are provided in such a manner that respective lower ends of 
the notches e, i, m, q, . . . and respective upper ends of the notches h, 
l, p, . . . are positioned on a horizontal line, and a plurality of third 
notches e', i' m' q' . . . are provided parallel to the notches e, i, m, 
q, . . . through respective notches h, l, p, . . . . 
Preferred embodiment of the present invention, paper products having 
perforations and perforate pattern as claimed in claim 4, wherein a notch 
width w between respective notches e, i, m, q, . . . and respective 
notches e', i', m', q', . . . is increased in comparison to only the width 
of respective notches e, i, m, q, . . . : e', i', m', q', . . . . 
Further embodiment of the present invention, paper products having 
perforations and perforate pattern comprises a paper E, a notch e 
obliquely provided at upper end portion of the paper, a vertical notch d 
provided at lower end of the oblique notch e with a given distance, next 
notch e' obliquely provided opposite to the oblique notch e and so as to 
position its upper end on lower end of the notch d in the horizontal 
position, and next vertical notch d' provided at lower end of the oblique 
notch e' with a given distance, and so on.

DETAILED EXPLANATION OF THE PREFERRED EMBODIMENT 
Referring now to the drawings, there are shown perforations or perforate 
pattern provided on a paper according to the present invention. 
FIG. 1 shows a perforate pattern provided on a paper used in a basic 
embodiment, and FIGS. 2 to 5 show perforated patterns provided on a paper 
used in several embodiments according to the present invention, 
respectively. In FIGS. 1 to 5, like reference characters designate like or 
corresponding parts throughout. In FIG. 1, E is a blank of a paper or a 
synthetic paper or pouches such as envelope (hereinafter, referred to as a 
paper), d is a straight perforation or notch formed at right angles to an 
end of the paper E, and a, b and c are three perforations or notches 
provided in a form of Y. Respective notches are arranged at an angle of 
almost 120.degree. with each other, and upper ends of upper opened two 
notches a and b are positioned at and in contact with a dotted line x 
which designates a horizontal position at the lower end of the notch d. 
Similar to the above situation Y shaped notches a', b' and c' are also so 
arranged that the upper ends of the notches a' and b' are positioned at 
the lower end of the notch c. These Y shaped notches are continuously 
provided in series downwardly until another end of the paper E. 
It is found from experiment that the angle between two notches a and b is 
an order of 90.degree. to 160.degree., practically, and the length of the 
notch d may be determined in accordance with the quality of paper and this 
notch d is indispensable. Respective notches a, b, c and d have respective 
lengths depending on the thickness of paper, the equality of material and 
the length of fiber. Generally, the more the thickness of the paper, the 
more the unequality of material, and the more the length of fiber, the 
more the length of notches. For example, in the case of an envelope having 
the thickness of about 0.1 mm, the length of notches was an order of 
0.1.about.1.5 mm and the width w of notches was an order of 1.5.about.2.0 
mm. In this case, it is preferable that for the paper having surface layer 
being liable to be peeled off, the length of both notches a and b must be 
more long and for the tracing paper being liable to be hard peeled off, 
the length of the notches a and b must be shorter. 
According to the construction of the paper products shown in FIG. 1, 
firstly, since the edge portion of the paper E is provided with the notch 
d, both sides of the notch d of the paper E are held between fingers of 
hands and cut by adding a twisting force, so that the paper E was easily 
separated away from each other. Then, since notches a and b are provided 
at both sides of the lower end portion of the notch in the horizontal 
direction, when the paper E is torn continuously (even through the rip of 
paper is out of the perforations in the oblique direction due to 
unequality of material of the paper E) the rip reaches either one of these 
notches a and b, and then reaches along either one of notches a and b 
lower end portion of a vertical notch c from the upper end portion 
thereof. Then, the rip of the paper E proceeded to shape notches a' and b' 
and c' as in the same manner as the above process, and to next Y shaped 
notches, and so on until the other end portion of the paper E along the 
perforations. According to this separation process, the rip is not 
deviated from the perforations towards right or left at all and the 
separation of the paper can easily be performed, so that the separating 
time can be decreased substantially. For example, the conventional 
separating time took about 15 seconds and the separating time according to 
the present invention took only about 5 seconds. Moreover, the separation 
of the paper can be surely and simply performed, so that the paper 
products according to the present invention can easily be utilized by 
anyone, such as a small child, a child, an old man and an lungler of 
finger. 
FIG. 2 shows a modification of the paper products having perforate pattern 
shown in FIG. 1. In this embodiment, the Y shaped notch pattern has a 
disconnected center portion. That is, one end portion each of respective 
notches a, b and c are separated from each other at the center portion of 
the Y shaped notch pattern. Other portions of the Y shaped notch of 
perforate pattern is the same as that of the Y shaped notch of the 
perforate pattern shown in FIG. 1, so that the construction and the 
operation thereof are omitted. 
Moreover, the notch c can be slanted as shown in FIG. 2 by a dotted line 
c". 
According to the construction of perforation shown in FIG. 2, a gap is 
formed at the center portion of the Y shaped notches a, b and c, so that 
the "hang-nail" caused at the center portion of the Y shaped notch pattern 
can be prevented. Moreover, as shown in FIG. 2 by the character c", when 
the vertical notch c" is made slightly oblique, the rip downwards to lower 
notch a' becomes short, so that the separating operation becomes simple 
and raped. 
FIG. 3 shows another embodiment of the paper products having perforations 
or perforate pattern according to the present invention. In this 
embodiment, an oblique notch e is provided at upper end of a paper E, and 
a notch h is obliquely provided opposite to the notch e so as to intersect 
an extension line of the oblique notch e at the center portion of the 
notch h. Lower end of the notch e and upper end of the notch h are 
positioned on a horizontal line. Next oblique notch i is provided so as to 
position its upper end and lower end of the notch h. The set of notches e, 
h and i is repeatedly and continuously provided until lower end portion of 
the paper E. In this case, the lower end of the first notch and the upper 
end of the second notch are positioned on a horizontal line, and so on. 
A dotted line f formed as an extension of the notch e is made in the form 
of perforations, and a dotted line g is provided between the lower end of 
the notch e and the upper end of the notch i and is made in the form of 
perforations. The provision of the perforations g and f limit a ripping 
direction at the lower end of the notch e and prevent a generation of an 
the rip in abnormal direction which cause in the direction of fiber of 
paper and not intended. These perforations f, g, j, k, . . . are not 
always necessary and can be omitted. First separation starting of the 
paper begin at a point P or a slightly right portion of the point P. 
FIG. 3 shows one embodiment of the oblique angle of the first notch e, but 
this oblique angle may be optionally determined by the paper quality. If 
this oblique angle is made small the paper can easily be separated with 
weak force even if it is strong paper. 
FIG. 4 shows a further embodiment of paper products according to the 
present invention. In this embodiment, a series of notches e, i, m, q . . 
. and h, l, p, . . . shown in FIG. 3 is provided, and a plurality of 
notches e', i', m', q', . . . is added thereto in such a manner that the 
notches e', i', m', q', . . . are positioned at right angles to the 
notches h, l, p, . . . and in parallel to the notches e, i, m, q, . . . 
The provision of such a patterned notch can tear a thick and firm paper 
within the width w of the pattern. In this case, respective lower ends of 
the notches e, e' and the upper end of the notch h are positioned on a 
horizontal line, and the lower end of the notch h and the upper ends of 
next notches i, i' are positioned on a horizontal line, and so on. The 
other portions of the notch pattern are the same as those of the notch 
pattern shown in FIG. 3. 
According to the above construction, first separation starting position are 
made points P and Q, so that separation of the paper can easily be 
performed and started from the upper end of the lower end of the paper. If 
the width of pattern is wide, the thick paper material can also be 
performed easily. 
FIG. 5 shows a further embodiment of the notch pattern according to the 
present invention. In this embodiment, the paper products comprise a paper 
E, a notch e obliquely provided at upper end portion of the paper, a 
vertical notch d provided at lower end of the oblique notch e with a given 
distance, next notch e' obliquely provided opposite to the oblique notch 
e, and so as to position its upper end on lower end of the notch d in the 
horizontal position, and next vertical notch d' provided at lower end of 
the oblique notch e' with a given distance, and so on. Provision of such a 
construction can make a fold in the direction of the notches d, d' and d" 
and the oblique angle of the notches e, e' and e" can be determined in 
dependent with the paper quality and the thickness of the paper to be 
used. 
According to such a construction, the generation of "hand-nail" can be 
prevented. 
As described above, the provision of a notch pattern according to the 
present invention can decrease the separating operation time, so that the 
separation of a blank of paper, envelope and a supply specification which 
is treated by a computer. 
While the preferred and alternate embodiments of the invention have been 
described in detail, modifications and adaptations thereto may be made 
without departing from the spirit and scope of the invention as recited in 
the following claims: