Source: https://patents.google.com/patent/EP1889793A2/en
Timestamp: 2019-12-10 08:10:11
Document Index: 718860312

Matched Legal Cases: ['art 7', 'art 102', 'art 102', 'art 102', 'art 102', 'art 102', 'art 102']

EP1889793A2 - Packaging member with easy-opening means - Google Patents
EP1889793A2
EP1889793A2 EP07023478A EP07023478A EP1889793A2 EP 1889793 A2 EP1889793 A2 EP 1889793A2 EP 07023478 A EP07023478 A EP 07023478A EP 07023478 A EP07023478 A EP 07023478A EP 1889793 A2 EP1889793 A2 EP 1889793A2
EP1889793B1 (en
239000005001 laminate films Substances 0 abstract claims description 48
The present invention refers to a packaging member in which an easy-tearing means for facilitating an opening operation toward the packaging member is provided, wherein the easy-tearing means is either positionally or structurally improved, said packaging member is a packaging container, a rectangular laminate film material providing a base of the packaging container being formed to have a box shape by mutually overlapping longitudinal both sides edges thereof in a palm-to palm manner to produce a cylindrical member, the overlapped palm-to-palm portions being joined to produce a palm-to-palm joined portion, the palm-to-palm joined portion being folded toward a remaining main part of the cylindrical member through a folding line set thereon, and a cylindrically shaped opening at each end of the cylindrical member being sealed. According to the invention the easy-tearing means has two cutting line formed at intervals at an end edge of palm-to-palm joined portion, and a further cutting line of which cut depth is within a thickness of the laminate film material, formed at a position on the main part near folding line so as to face the two cutting lines, both ends of the further cutting line being extended to the palm-to-palm joined portion beyond the folding line to connect or intersect to or with the two cutting portions.
One such practical packaging container has been proposed by Japanese Patent Publication (Laid-open) No. 9 (1997)-104449 . According to the publication, the packaging container is formed in a box shape by joining side ends of a laminate film material in a palm-to-palm manner to form a cylindrically shaped body, and by joining circular openings at both ends of the cylindrically shaped body. Two cutting portions are formed at intervals from an end of the palm-to-palm joined portion so as to produce a pinching portion. A fractured straight line is formed in the main part of the laminate film material closely to, but in parallel with a folding line of the main part. Hence contents in the container can be taken out by opening the container along a circumference thereof with pulling the pinching portion outwardly.
Fig.4 is a diagram showing a laminate film forming apparatus for forming the laminate film shown in Fig. 3;
Referring to Figs. 1 - 9A to 9C, a first embodiment will now be descried.
The front face 2 is formed into a flat form, and a rough surface portion 7 functioning as an easy-opening portion is formed at a portion to which the upper part slightly shifted inwardly from a certain side edge. This rough surface portion 7 is formed with plurality of scattered small fine concavities, and when opening the packaging bag 1, it acts as a tearing start point from which the tearing starts, which may be explained later. In addition, the edge of the rough surface portion 7 is located inwardly and distant from the side edge of the packaging bag 1, so that the rough surface portion 7 does not reach the side edge of the packaging bag 1. In the case of Fig. 1, the rough surface portion 7 is surely apart by a distance "A" from the side edge.
Fig.3 shows an example of a layer structure of the laminate film 10. The laminate film 10 described in Fig.3 does not include an aluminum foil layer, for example, while a PET (polyethylene terephthalate) film layer 11 serving as a base layer of the laminate film 10, which is placed on the outer surface of the packaging bag 1, is combined with a PE (polyethylene) film layer 15, which is placed on the inner surface thereof, through adhesive 14.
A biaxial oriented film having a thickness of 12 i m is utilized to form the PET film layer 11 serving as the outer layer and the inner surface of the PET film layer 11 is coated with the PVDC film layer having a thickness of about 3 i m. A PE film having a thickness of 70 i m is utilized to form the PE film layer 15 serving as the inner layer. Further, a dry-laminate adhesive or a solventless adhesive is used as the adhesive 14 for connecting the outer and inner layers.
Fig.4 illustrates an apparatus 20 for forming the laminate film, which produces the packaging bag of the present invention. A laminate film forming apparatus 20 is composed of a printing device 21, a rough surface forming device 25, and a lamination device 29. The printing device 21 is used to apply a printing step to a single surface 50a of the strip-shaped PET film 50 serving as the base layer. The rough surface-forming device 25 forms a rough surface portion on a surface 50b opposite to the printed surface 50a. The lamination device 29 laminates, on the strip-shaped PET film 50, a strip-shaped PE film 51 serving as the inner layer in the laminate film in such a manner that both the films 50 and 51 can be joined to each other. The printing step, the rough surface-forming step, and the lamination step are applied in this order to the strip-shaped PET film 50 serving as the base material, while the PET film 50 travels in the longitudinal direction.
The printing step is first applied to the strip-shaped PET film 50, which has been fed from the left-hand side in Fig. 4. During the printing step, the single surface 50a of the strip-shaped PET film 50 is subjected to printing of characters and/or designs with the use of the printing device 21. The printing device 21 is composed of a gravure printing device, in which the PET film 50 travels between a lower roller 24, which is immersed into ink received in a tank 22, and a blanket roller 23, which is placed above the lower roller 24, so as to carry out the printing step.
Precisely, first, the upper part of the packaging bag 1 is slightly moved in the right-and-left direction thereof in such a manner that the front face 2 is shifted relatively to the rear face 3 (refer to the state shown in Fig. 9A). Then the rough surface portion 7, which is formed at a slightly inside position from the side edge, is drawn to the side of the packaging bag 1 (refer to the state shown in Fig. 9B). After drawing the rough surface part 7in such a way, the packaging bag 1 can be torn open by tearing the upper part of the packaging bag 1 with the aid of the rough surface portion 7 (refer to the state shown in Fig. 9C). As a result, the upper end 5 can be separated from the main part of the packaging bag 1. When located at the side edge, the rough surface portion 7 makes it possible to easily tear the upper part of the packaging bag 1 at the rough surface portion 7. This is because the rough surface portion 7 serves as a tearing start position and makes the start of the tearing operation easier.
As shown in Figs. 11 and 12, a packaging container 100 is formed into a box shape. That is, two side edges 102a of a rectangular-shaped laminate film material 102 are mutually joined in a longitudinal direction in a palm-to-palm manner to form a cylinder. Joining the palm-to-palm portions to each other then forms a palm-to-palm joined portion 103. The palm-to-palm joined portion 103 is folded toward a main part 102b of the laminate film material 102 through a folding line 104 existing thereon. By closing cylindrically shaped openings at both longitudinal ends of the cylinder, sealed portions105 and 106 are formed.
Practically, the two cutting portions 107 are prolonged from an outside edge of the palm-to-palm joined portion 103 along the lateral direction to a folding line 104 over a distance of about 1/2 of the width (overlapped strip portion) of the palm-to-palm joined portion 103. A portion separated by the two cutting portions 107 of the palm-to-palm joined portion 103 forms a pinching portion 110.
Moreover, a trapezoidal cutting line 108 is formed on main part side 102b closely to the folding line 104 correspondingly to the two cutting portions 107.
As shown in Fig. 13, the trapezoidal cutting line 108 consists of a straight segment and inclined prolonged ends 108a prolonged obliquely from the segment. Both of the inclined prolonged ends 108a extend from the side of the main part 102b to cross the folding line 104, and further extend to or beyond the points where the inclined prolonged ends 108a each encounter virtual extended lines 107a from the cutting portions 107 formed in the palm-to-palm joined portion 103.
The above-mentioned circular arc cutting line 109 is, like the trapezoidal cutting line 108 shown in Fig. 14, formed by the perforations having the 1 mm-cut portions and the 0.5mm-continuous portions by turns. The depth of the perforations is determined not to reach a back layer of the material.
Two cutting portions (lines) 107 are then formed at given end positions of the palm-to-palm joined portion 103, so that the cutting portions 107 are arranged in a face-to-face manner toward the trapezoidal cutting line 108 formed in the main part 102b. The length of the two cutting portions 107 is about 1/2 of the overlapped width of the palm-to-palm joined portion 103. In this case, the two cutting portions 107 are formed so that their virtual extended lines 7a, 7a each meet both ends 8a of the trapezoidal cutting line 108 or each cross such both ends 8a.
By pulling the pinching portion 110 farther away, the palm-to-palm joined portion 103 will be torn along with the virtual extended lines 107a following the two cutting portions 107. When the tip of this torn piece reaches both ends 108a of the trapezoidal cutting line 108, the torn piece is transferred, by way of both ends 108a and beyond the folding line 104, to the straight-line portion of the trapezoidal cutting line 108 arranged in the main part 102b. This transfer will cause the straight-line portion of the trapezoidal cutting line 108 to be torn off, thereby separating the pinching portion 110 from the portion 103 connected to the main part 102b.
When the pinching portion 110 is pulled further, as shown in Fig. 15, the pinching portion 110 opens the main part 102b along a circumference thereof with its width held. Accordingly, it is possible to tear the box-shaped packaging container 100 in a ring form at a middle position in the longitudinal direction. The contents that have been accommodated in the box-shaped packaging container 100 can therefore be taken out.
In a further embodiment, a packaging member in which an easy-tearing means for facilitating an opening operation toward the packaging member is provided, wherein the easy-tearing means is either positionally or structurally improved, said easy-tearing means is formed at a position shifted inwardly from a perimeter edge of the packaging member without passing through the perimeter edge, said easy-tearing means being to be drawn to the perimeter edge.
In a further preferred embodiment, the packaging member is a packaging bag, wherein the easy-tearing means serves as a tear-starting point when opened using the easy-tearing means.
In a further preferred embodiment, the easy-tearing means is a rough surface consisting of fine irregularities, the rough surface being formed at a position shifted inwardly from a side edge of the packaging bag without passing through the side edge.
A packaging member (100) in which an easy-tearing means (107, 108) for facilitating an opening operation toward the packaging member is provided, wherein the easy-tearing means is either positionally or structurally improved,
said packaging member is a packaging container (100),
a rectangular laminate film material (102) providing a base of the packaging container being formed to have a box shape by mutually overlapping longitudinal both sides edges (102a) thereof in a palm-to palm manner to produce a cylindrical member (102), the overlapped palm-to-palm portions (102a) being joined to produce a palm-to-palm joined portion (103), the palm-to-palm joined portion being folded toward a remaining main part of the cylindrical member through a folding line (104) set thereon, and a cylindrically shaped opening (105 (106)) at each end of the cylindrical member being sealed,
wherein the easy-tearing means has
two cutting line (107) formed at intervals at an end edge of palm-to-palm joined portion, and
a further cutting line (108, 109) of which cut depth is within a thickness of the laminate film material, formed at a position on the main part near folding line so as to face the two cutting lines, both ends of the further cutting line being extended to the palm-to-palm joined portion beyond the folding line to connect or intersect to or with the two cutting portions.
The packaging member according to claim 1, wherein the further cutting line consists of an ark-like cutting line (109).
The packaging member according to claim 1, wherein the further cutting line consists of a trapezoidal cutting line (108).
The packaging member according to any of claims 1-3, wherein the laminate film material has a three-layer structure of a biaxial oriented polyester film, a monoaxial oriented high-density polyethylene film, and a polyethylene film.
The packaging member according to any of claims 1-3, wherein the laminate film material has a three-layer structure of a biaxial oriented polyester film, a monoaxial oriented polypropylene film, and a polyethylene film.
The packaging member according to any of claims 1-3, wherein the laminate film material has a four-layer structure of a biaxial oriented polyester film, an aluminum foil, a monoaxial oriented polypropylene film, and a polyethylene film.
EP1889793A2 true EP1889793A2 (en) 2008-02-20
EP1889793B1 EP1889793B1 (en) 2012-06-27
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