JP2000309375A - Lid made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid made of a paper wherein there exists no fear of peeling of the paper, etc., and opening can be easily and surely performed when a square paper container (a tray) with the lid made of the paper is to be opened. SOLUTION: In a lid 10 made of a paper wherein a seal part with approximately the same shape as a flange part is sealed on the flange part of a square paper container, the lid 10 made of the paper wherein a grip piece 20 is provided on its one corner with two notch lines 22 and back half cut lines 24 for the grip piece are provided from the tips of the notch lines 22 toward the center and a peripheral back half cut line 32 is provided along the inner edge of a seal part on the outside from the tips on the center side of the half cut lines 24 for the grip piece and in addition, a peripheral surface half cut line 34 with a definite width W on the outside of the peripheral back half cut line 32, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper lid structure for sealing a container (tray), and more particularly, to a paper lid which can be easily opened.

[0002]

2. Description of the Related Art In recent years, paper containers have been used in many fields in place of plastic containers in recent years as various environmental problems related to the depletion of resources and the increase of wastes, that is, various environmental problems due to incineration have been reported. It has come to be.

As an example of the paper container, there is a rectangular paper container (tray) having a flat flange portion, and the flange portion is made of paper (cardboard) in order to protect the contents from sanitation or evaporation. ) Is sealed.

[0004]

However, when the paper lid is peeled off from the seal portion and the seal is to be opened, it is difficult to peel off when the seal strength is too strong, and paper sticking occurs on the back side of the thick paper, which is undesirable in appearance. Met. Further, if the sealing strength is too weak, there is a problem that the seal is unintentionally peeled off.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method for opening a rectangular container (tray) with a paper lid. Another object of the present invention is to provide a paper lid which can be easily and reliably opened.

[0006]

In order to achieve the above-mentioned object in the present invention, first, according to the first aspect of the present invention, a sealing portion having substantially the same shape as the flange portion is sealed on the flange portion of the rectangular container. A paper lid, provided with a handle piece with two cut lines at one corner thereof, and a back half cut line for the handle piece from the tip of the cut line toward the center, and a back half cut line for the handle piece. A peripheral back half-cut line along the inner edge of the seal portion outside the center-side tip, and a peripheral front half-cut line having a fixed width outside the peripheral back half-cut line. It is a paper lid to be used.

Further, in the invention according to claim 2, a short preliminary back half-cutting line is provided vertically to the center side at a half or less of the cut line, and the back half for the handle piece is extended to the center of the preliminary back half-cutting line. 2. The paper lid according to claim 1, wherein the cutting line is provided to extend.

According to a third aspect of the present invention, a spare front half-cut line is formed outside and in parallel with the back half-cut line for the handle piece to the peripheral front half-cut line. Item 6. The paper cover according to item 1 or 2.

According to a fourth aspect of the present invention, one of the two cut lines is provided so as to extend in the center direction to the vicinity of the peripheral front half cut line. Or a paper lid according to 3.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in the side sectional view of FIG. 2, the paper lid of the present invention is provided on a flange portion (82) of a rectangular paper container (8) with a seal portion (30) having substantially the same shape as the flange portion (82). 2. A paper lid (10) for sealing the two, as shown in a blank plan view of FIG. 2, is provided with a handle (20) by making two cut lines (22) at one corner. A back half-cut line (24) for a handle piece is formed from the tip of the cut line (22) toward the center, and the two pieces are separated outward from the tips of the two half-cut back lines (24) for the handle piece. A peripheral back half-cut line (32) is formed along the inner edge of the seal portion (30) over the entire circumference, and a peripheral front half-cut line having a constant width (W) outside the peripheral back half-cut line (32). (34).

In the above case, the rectangular container is a rectangular paper container (8), but it may be a rectangular plastic container. However, as described in the section of the related art, paper is preferable in consideration of resource issues and environmental issues related to waste.

To open the paper lid (10) of the present invention, grip the handle piece (20) by hand, pull it up, peel it off the flange portion (82) along the cut line (22), and pull it up further. The lid surface is torn to the peripheral surface half-cut line (34) according to the handle piece rear half-cut line (24), and when the lid surface is further lifted up, as shown in the schematic side sectional view of FIG. 34) and the width (W) of the back half-cut line (24) for the handle piece causes delamination of the cardboard to produce a paper lid (10).
However, the paper lid is completed separately from the part having the seal part (30), so that the paper lid has no seal, and the paper lid that can be opened cleanly and securely in appearance can be provided. . In particular, since the handle piece (20) is formed by two cut lines (22), the opening property of the opening can be improved and the opening can be easily performed.

Further, since the back half of the handle piece (20) is provided on the extension of the handle piece (20), when the handle piece (20) is pulled up as described above, the back half of the handle piece (20) is cut off. ), The surface of the lid is torn, and at first glance a tear mark that has been opened remains, so that the paper lid (10) can be provided with virginity (illegal opening prevention).

The paper lid (10) has a rice basis weight of 200 g /
Since it is necessary to print on the surface of paperboard of m ^{2 to} 500 g / m ² , coat manila, coated ball, ivory, etc., at least one side of which is white, can be used. further,
Since it is necessary to seal the flange portion (82) of the rectangular paper container (8) with a heat seal or the like, the rear surface has a thickness of 15 μm or less.
What laminated | stacked the film which was excellent in sealability, such as a thin polyethylene film or a polypropylene film of 80 micrometers, is used. These films also take into consideration the hygiene when the contents are food, and also serve as a moisture barrier.

The fixed width (W) between the half back line (32) and the half line (34) varies depending on the size of the paper lid (10), but is 2 to 3 mm. The degree is an appropriate value. If it is too large, delamination of the paperboard will not be smooth, and if it is too small, the marginal back half-cut line (32) and the marginal front half-cut line (34) will be drawn from the front and back of the lid. In a manufacturing process provided with separate blades, their positions (registrations) do not match, and there is a risk that they may overlap. If they overlap, they will be completely cut and open before opening, which is not preferable.
However, if the process of simultaneously inserting the front and back half-cut lines is possible,
It is possible to set it to 2 mm or less and about 1 mm.

With respect to the problem of the positional (register) accuracy as described above, the cut line (22) formed by the handle piece (20) is the same, and this cut line (22) and the subsequent half-cut line for the handle piece ( 24) may be shifted vertically and horizontally and may not be connected as a straight line. If they are not connected linearly in this way, they will be deviated from the cut line (22) and will be broken, making it impossible to reliably open. In order to solve such a problem, the invention according to claim 2 is based on an enlarged plan view near the handle piece (20) in FIG.
2 or less, the preliminary back half-cut line (2
6), and the back half-cut line (24) for the handle piece is extended to the center of the short preliminary back half-cut line (26).

As described above, the short preliminary back half line (2
6) and the extension of the back half-cut line for the handle piece (24), even if the cut line (22) and the back half-cut line for the handle piece (24) are misaligned, the paper When the lid (10) is opened, the lid is cut from an extension of the short preliminary back half-cut line (26) and the back half-cut line for the handle piece (24) to ensure opening.

The reason why the position of the short preliminary back half-cut line (26) is set to be equal to or less than 1/2 of the cut line (22) is as follows.
If it is provided near the front end of the handle piece (20), there is a danger that the short spare half back line (26) may be broken unintentionally, that is, before it is opened during transportation or the like. is there.

Furthermore, in order to make the opening more reliable, in the invention of claim 3, as shown in an enlarged plan view near the handle piece (20) in FIG. A spare front half-cut line (36) is formed outside and parallel to the line (24) up to the peripheral table half-cut line (34).

By applying the preliminary front half-cutting line (36) as described above, even when the paper lid (10) is opened, even if the paper lid (10) comes off the handle half-cutting line (24) and breaks. The tear is corrected by the spare front half-cut line (36), and the break is connected to the peripheral front half-cut line (34), so that the opening can be more reliably performed.

Further, as shown in an enlarged plan view near the handle piece (20) in FIG. 5, one of the two cut lines (22) (in the case of FIG. The cut line (22) on the left side when viewed from the direction (20) is
It is provided so as to extend in the center direction to the vicinity of the peripheral edge half-cut line (34).

As shown in FIG. 5, by extending the cut line (22) on the left side as viewed from the direction of the handle piece (20), a right-handed person can open the paper lid (10). The right hand thumb and forefinger grip the handle piece (20) and pull it up, so that the handle piece (20) is lifted so as to open outward.
Can be easily and reliably opened.

Conversely, if the right cut line (22) is extended from the direction of the handle piece (20), the paper lid (10) can be opened more easily for a left-handed person. .

The paper lid (10) of the present invention is sealed on a flat flange portion (82) of a rectangular paper or plastic container (8). The pentagonal shape can be used as long as the flange portion (82) is flat.

[0025]

As described above, the present invention has the following effects. That is, a handle made of two cut lines is provided at one corner of a paper lid for sealing a seal portion having substantially the same shape as the flange portion on a flange portion of a rectangular container (tray), and a tip of the cut line is provided. A rear half-cut line for the handle piece is provided further toward the center, and a peripheral half back-cut line is provided along the inner edge of the seal portion outside the center end of the rear half-cut line for the handle piece. By applying a semi-peripheral line having a constant width (about 2 to 3 mm) to the outside of the cut line, the seal portion of the paper cover is free of paper marks, etc. It can be a lid. Furthermore, since the handle piece is formed by two cut lines, the opening startability is improved, and the opening can be easily performed.

Also, since the back half-cut line for the handle piece is provided from the back on the extension of the handle piece, the lid surface is torn according to the back half-cut line for the handle piece, and at first glance, a trace of tearing open is left. A paper lid having excellent anti-opening properties can be obtained.

Also, a short preliminary back half-cut line is provided vertically to the center of the lid at a half or less of the cut line, and the back half-cut line for the handle piece is extended to the center of the short preliminary back half-cut line. With this arrangement, even when the position of the cut line does not match the position of the back half-cut line for the handle piece in the manufacturing process, it is cut along the short preliminary back half-cut line, thereby enabling reliable opening.

Further, a spare front half-cut line is added outside and in parallel with the two back half-cut lines for the handle pieces, so that the back half for the handle pieces is opened at the time of opening. Even if it breaks off from the break line, the break is corrected by the spare front half-break line and cut off by being connected to the peripheral front half-break line, so that the opening can be more reliably performed.

By providing one of the two cut lines extending in the center direction to the vicinity of the half cut line on the peripheral edge, a paper lid that can be more easily opened can be obtained.

Therefore, the present invention exerts an excellent practical effect as a paper lid for sealing a paper or plastic container (tray) for storing foods and the like.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a paper lid blank according to the present invention.

FIG. 2 is an explanatory view showing an embodiment in which the paper lid of the present invention is sealed in a container (tray) in a side cross section.

FIG. 3 is an explanatory diagram showing a side cross section of an embodiment in which the paper lid of the present invention is opened.

FIG. 4 is an enlarged front view showing one embodiment of the vicinity of a handle piece of the paper lid of the present invention.

FIG. 5 is an enlarged front view showing another embodiment of the vicinity of the handle piece of the paper lid of the present invention.

[Explanation of symbols]

 8 square container (tray) 10 paper lid 20 handle 22 cut line 24 half back cut line for handle 26 short short back half cut line 30 seal part 32 Semi-cut line at the back of the periphery 34 ‥‥ Semi-cut line at the periphery of the table 36 ‥‥ Semi-cut line at the spare table 82 ‥‥ Flange W

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E067 BA07A BA10A BB01A BB15A BB16A BB25A BC02A CA24 EA11 EA37 EB05 EB27 FA01 FC01 3E093 AA04 BB16 CC01

Claims (4)

[Claims] 1. A paper lid for sealing a seal portion having substantially the same shape as a flange portion on a flange portion of a rectangular container, wherein two corners are provided at one corner of the paper lid. A rear half-cut line for the handle piece toward the center from the tip of the handle piece, and a peripheral back half-cut line along the inner edge of the seal portion outside the center end of the rear half-cut line for the handle piece; A paper lid characterized by being provided with a peripheral front half-cut line having a certain width outside the back half-cut line. 2. A short preliminary back half-cut line is provided vertically to the center side at a half or less of said cut line, and said back half-cut line for handle is extended to the center of said short preliminary back half-cut line. The paper lid according to claim 1, wherein the paper lid is provided. 3. The paper according to claim 1, wherein a spare front half-cut line is formed outside and parallel to the back half-cut line for the handle piece to the peripheral front half-cut line. Lid made. 4. One of the two cut lines is
The paper lid according to claim 1, 2 or 3, wherein the paper lid is provided so as to extend in the center direction to the vicinity of the half-cut line on the peripheral surface.