JPS6278048A - Method of breaking sheet-shaped member and sheet-shaped member breaking structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for breaking a breakable sheet-like member along a predetermined breaking line that can maintain its shape before breaking, and a method thereof. It relates to a sheet-like material fracture structure.

DESCRIPTION OF THE PRIOR ART Members of the above structure are particularly desirable for a variety of applications.

For example, aluminum foil is often used to wrap frozen foods. Also, a portion of it must be selectively torn for cooking purposes. Flexible plastic sacks or sachets containing food must be able to be opened quickly and the contents easily released. It is particularly used as a plastic lid with rigid containers such as cups, pails, bottles, cans, etc.

For example, all beverages these days are transported in plastic and paper containers that are packaged with openable lids.

(Problems with the Prior Art) However, the problem of spillage sometimes occurs when the lid is opened. For chilled drinks, some solution may be provided by having a straw orifice that allows the lid to open freely. However, this method is less than desirable since most users prefer to drink through an opening rather than through a straw.

Many types of 7-lip opening lids have been developed.

For example, U.S. Pat. No. 3,994,411, 6.97
Z559, No. 4.210, 272, No. 4.202.
No. 459, No. 4,412,629, No. 4,090,6
No. 60, No. 4,285,442, etc.

However, the above-mentioned lids disclosed in these documents are basically made by notching the lid along a predetermined line and opening the lid along the notches, and therefore the material is structurally weak at the place where the notches are made. It has become a thing. The contents of the container may leak from this originally undesirable weak structural portion, and furthermore, accidents such as the mouth opening from the torn top portion and the contents spilling out may occur due to the tearing. Therefore, it is particularly desirable to have a basic structure that does not need to be structurally weakened and can be broken only along a predetermined break line.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a breakable sheet-like member structure and a method of breaking a sheet-like material along a predetermined breaking point line as described above.

In addition, the present invention provides a variety of breakable structures as described above, such as container lids, plastic sachet packages, metal foils, etc., which structures do not have a weak break line, such as having a scored break line. , the aim is to provide a structure that can be uniformly and reliably ruptured at a desired location.

(Means and operations for solving all the problems) In order to achieve the above object, a method of breaking a seed-like member along a predetermined broken VI line according to the present invention includes (a) a method of breaking a seed-like member along a predetermined broken VI line; a breaking line is set, and means for reinforcing the sheet-like member along the set breaking line is provided, (b) an overhang is provided at an edge of the sheet-like member, and (C) an overhang is provided at the edge of the sheet-like member. (d) Proceeding the breakage of the sheet-like member from the breakage-starting means along the reinforcing means, and causing the sheet-like member to break along the break line. It is characterized by a process of rupturing. The pleat has at least one edge, a base, and an apex.

Preferred materials include heat-formed container lids or flexible plastic pouches, metal foils such as aluminum foil, and plastic materials.

The reinforcing means formed along the predetermined break line is applied to the thin sheet-like member in a known manner, preferably by stretching in one direction.

By pleating the sheet, reinforcing means extending in substantially the same direction are completed. This fold is trapezoidal,
or have a curved, flat or fairly sharp apex.

The angle between the base and the apex can be up to 90 degrees and preferably lies between 15 and 40 degrees. The tab may simply take the form of a notch in the margin edge.

Furthermore, the fracture structure of the sheet-like member according to the present invention includes (a) a sheet-like member having an overhanging portion along the edge;
means for reinforcing the sheet-like member provided along a predetermined breaking line set on the sheet-like member; (C)
A sheet-like member breaking structure comprising a break-starting means connected to the reinforcing means on an overhanging portion of the sheet-like member, the sheet-like member being broken from the breaking-starting means along the reinforcing means.

(Description of Examples) Examples according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a container lid with a predetermined pleated break line.

In FIG. 1, reference numeral 10 indicates a movable lid.

This lid 10 is made of a thin sheet-like plastic material.
A circular shape is formed and a margin edge 11 is formed along the periphery of the circular shape.
and a circumferential groove 12 snap-fittable to the upper edge 16 of a conventional movable drinking cup 14, such as paper (shown in phantom) with a plastic or coated coating on its back side. .

Furthermore, the lid 10 has a central large means 15.

The lid 10 has a corresponding predetermined break line.

It includes a plurality of pleats 20 in a semicircular pattern along which define a removable portion of the lid. This pleat has at least one edge 21, a base 26 and an apex 24.
and the apex 24 is sharply curved as shown in FIG. 2, or the apex is flat like a trapezoidal head as shown in FIG. 2A. ．． 4・1,4j゛′:i-7 It can take various forms as shown below.

Means are provided in the margin edge 11 so that the tear progresses towards the pleats 20. This means may consist of tabs or notches or both as shown. In the embodiment of FIG. 1, a tab 25 and a notch 26 are formed in the margin edge 11 adjacent the first of the pleats 20 and the edge 21. In the embodiment of FIG.

According to the method according to the invention, the tab 25 or notch 2
6 or any of the adjacent edges 2
1. Accordingly, the user simply grasps the tab 25 and begins a breaking motion from the edge of the tab 25 toward the start of the pleat, progressing along the circle defined by the pleat line, ie, the predetermined break line.

As shown in FIG. 1, the base of the tab 25 may be provided with the notch 26. Therefore, at the same time as the tab 25 is lifted, the fracture progresses along the diameter of the tab itself only toward the inside of the notch.

FIG. 6 shows the lid structure in a partially broken state similar to FIG. 1.

Regarding the tab 25, a feature of the present invention is that the tear progresses sequentially in two directions. That is, the rupture once advances onto the edge of the lid 10 and then moves in the radial direction, and then proceeds along the pleats in a tangential direction to the apex of the pleats 20. The tear propagates in the following manner. As shown in FIG. 6, when pulled, the apex 24 of the last attached pleat 20 remains attached until the next adjacent base 26 opens the tear. This is due to the dimensions of the successive pleats, which also allow the material at the top to deform to a greater extent than the adjacent bottom material, causing the latter to tear before the former. Become. This feature allows the tear to be pre-oriented as soon as the material at the apex is torn. As a result, the initial goal of weakening any structure for fracture is satisfied. That is, rather than randomly creating a break line by chance, the break line should progress in a predetermined manner.

This random fracture is caused by the structure being extremely stiff across the pleated cross-section and weak at the fine lines where the reeds and pleats stop.

The angle formed between the base and apex of the pleats is an important feature. This angle preferably does not exceed 90° and is preferably between 15' and 40°.

According to the invention, it has been found that the lines forming the pleats create sharp cuts along predetermined lines. The pleats did not weaken the overall structure, and their dimensions actually made them more rupture resistant.

At the same time, it has been found that a force applied along the tangent to the circle formed by the pleats will easily and reliably cause the fracture to proceed along its circumference. This means that
This is in contrast to the conventional use of score lines which weakens the entire structure and often breaks away from the break line.

The pleats can be easily formed by thermal processing or embossing of a thin breakable sheet material such as plastic, paper, metal foil, etc.

The present invention is easily applied to thin sheet materials commonly used in packaging parts where easy opening is desired.

FIG. 4 shows a 30 vol. sealed sachet formed from a flexible plastic material.

The pleats 31 extend into the pouch 60 to a margin edge 62. A tab 33 having notches 34, 35 in the base is formed in the first adjacent margin edge 32 of said pleat 61 and is pressed in the manner shown in FIGS. 1-3. Breaks are made in the direction of the folds 31.

In this embodiment, the breakage of the folds 61 along the two edges does not cause a clear tear along the predetermined break line formed by the folds 31, unlike the conventional method. It becomes possible to open the sealed pouch. Previously, scissors were required to open this pouch. Apart from this, the cross section has been made weaker by adding so-called tear pieces or by making cuts or thinning. The tear piece is a ribbon of a different material than that of the narrow, strong pouch 60. This ribbon is usually made of strong plastic or metal, and is attached to the pouch by adhesive or heat-based sealing methods, and will not separate from the pouch when pulled, but will not tear. It is designed to open.

However, such breaches are unreliable and often do not open completely. Similarly, a rigid or weak structure may lead to poor reliability and other problems.

FIG. 5 shows a package 40 wrapped in aluminum foil 41. The aluminum foil 41 has corrugations 42 extending to a margin edge 46.

A tab 44 is provided in the margin edge 46 adjacent the first of the pleats 42 in the same manner as shown in FIGS. It propagates along the lines of the folds in a manner similar to the illustrated embodiment.

This embodiment is particularly useful for frozen foods where a well-defined predetermined break line is desired to keep a portion of the contents encased during heat processing.

(Effects of the Invention) The method for breaking a sheet-like member and the sheet member having the breaking structure according to the present invention have the following various excellent effects. The precise break line of the break does not have the disadvantages of conventional score lines. For example, the surface of the article according to the invention prior to rupture does not have any weak areas that are susceptible to tearing. In fact, the pleats, apart from making the overall structure weak, make it incredibly strong against pressures applied to the surface. In addition, there is no risk of leakage or accidental opening before rupture, which is often the case with the above-mentioned scored lines. Furthermore, it is easy to form the above pleats, and if the notches are too deep, cuts will be made in the material itself, which requires adjustment with a sophisticated tool, and if the notches are too shallow, inappropriate cuts will occur. The conventional drawbacks such as the formation of

The breaks produced by the method according to the invention are surprisingly easy to form and sufficiently precise. The present invention is applicable to a variety of materials and is applicable to thin sheet materials where its construction is particularly beneficial.

[Brief explanation of drawings]

1 shows a perspective view of a container lid according to the invention which is crimped with a predetermined break line fixed to a cup; FIG. 2 shows a detail of said crimps; FIG. line 2-2
2A shows a modified example of the pleats similar to that in FIG. 2, FIG. 3 shows a partially broken state of the lid of the container shown in FIG. 1, and FIG. 5 shows a flexible plastic pouch pleated to have a predetermined break line according to the present invention, and FIG. The aluminum foil cover is shown. (Explanation of symbols) 10...Lid, 11...Margin edge, 12...Circumferential groove, 16...Cup upper edge, 14...Cup, 15...Central large means , 20... pleats, 21...
Edge of fold, 23...Base, 24...Apex, 25
...Tab, 26...Notch, 60...Sealable pouch, 32...Margin edge, 33...Tab, 34.
35...notch, 41...aluminum foil, 40.
...Package, 42...Fold, 43...Margin edge, 44...Tab. JFJfG-2 JFiG-11133 →-... Tough procedural amendment (voluntary) June 25, 1985

Claims (23)

[Claims] (1) (a) A predetermined break line is set on the sheet-like member, and means for reinforcing the sheet-like member is provided along the set break line, (b) An overhang is provided at the edge of the sheet-like member. (c) providing a breaking initiation means connected to an end of the reinforcing means on the overhang; (d) advancing the breaking of the sheet-like member from the breaking initiation means along the reinforcing means; A sheet-like member breaking method comprising the step of breaking the member along the breaking line. (2) The reinforcing means comprises a plurality of pleats, each of the pleats having at least one edge, a base, and an apex, and the fracture initiation means is adjacent to the first of the pleats and extends along the edge of the pleat. 2. The method according to claim 1, wherein the fracture progresses over time. (3) The method according to claim 1, wherein the breakage initiation means is a tab. (4) The method according to claim 1, wherein the fracture initiation means is a notch. (5) The method according to claim 2, wherein the sheet-like member is made of plastic. (6) The method according to claim 5, wherein the sheet-like member is a lid of a container treated with heat. (7) The method according to claim 2, wherein the pleats have a substantially triangular shape. (8) The method according to claim 2, wherein the pleats are trapezoidal. (9) Claim 2, characterized in that the angle between the base and the apex constituting the pleat does not exceed 90 degrees.
The method described in section. (10) The angle between the base and the apex is 15 degrees and 4
3. A method according to claim 2, characterized in that the angle is between 0 degrees. (11) the pleat has two edges, and the member:
3. A method as claimed in claim 2, characterized in that it is broken along the two edges. (12) (a) A sheet-like member having an overhang along an edge; (b) means for reinforcing the sheet-like member provided along a predetermined breaking line set on the sheet-like member; (c) A sheet-like member breaking structure comprising a break-starting means connected to the reinforcing means on an overhanging portion of the sheet-like member, the sheet-like member being broken from the breaking-starting means along the reinforcing means. (13) The reinforcing means consists of a plurality of folds provided along the predetermined break line, and the first of the folds is adjacent to the overhang and has at least one edge, a base, and an apex. 13. The structure according to claim 12, wherein the breaking initiation means is adjacent to an edge corresponding to the first fold of the pleats, and the breaking progresses along the predetermined breaking line. 14. The structure of claim 13, wherein said pleat has two edges and further includes means for creating a break line adjacent both of said edges. (15) The structure according to claim 12, wherein the fracture initiation means is a tab. (16) The structure according to claim 12, wherein the fracture initiation means is a notch. (17) The material according to claim 13, wherein the sheet-like member is made of hard plastic. (18) The structure according to claim 13, wherein the sheet-like member is a lid of a container formed by heat. (19) The structure according to claim 12, wherein the sheet-like member is made of flexible plastic. (20) The structure according to claim 12, wherein the sheet-like member is an aluminum foil. (21) The structure according to claim 13, wherein the pleats have a substantially triangular shape. (22) The structure of claim 13, wherein the angle between the base and the apex does not exceed 90 degrees. (23) Claim 1, characterized in that the angle between the base and the apex is between 15 degrees and 40 degrees.
Structure described in Section 3.