JPS5974058A - Easy-open cover and its manufacture - 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 The present invention relates to the structure of an easy-to-open lid and a method for manufacturing the same, and more particularly to an easy-to-open lid that is easy to manufacture, does not damage the original shape before opening, and can be opened with minimal force. We are trying to provide the following.

In the easy-open lids currently in use, the seal tab is often made of aluminum foil, and the aluminum foil is thinly rolled, so when it is heated to adhere to the container lid plate, it extends from the adhesive and comes loose. If the outer surface is laminated with resin, the heated resin shrinks and shrinks even more, and the appearance of the product will be significantly deteriorated. Furthermore, stacking the side cover plates with curved knobs can easily cause bending.

Further, when the seal tab is bonded to the container lid plate via an adhesive layer, the force for peeling it off is proportional to the width of the adhesive layer, and the wider the width of the adhesive layer, the greater the force for peeling it off. However, the seal tab currently in use has the disadvantage that the boundary line between the adhesive part and the grip part is a straight line, requiring a large peeling force for initial movement.

Furthermore, since the adhesive layer does not bond sufficiently by heating and pressurizing once, it is necessary to repeatedly apply heat and pressurize with a seal nozzle during conveyance on the line, but the position of the spout hole is If it is not done properly, it is necessary to align the seal nozzle and the seal tab at each step, which may result in a complicated bonding work.

The present invention provides an easy-to-open lid that eliminates all of these drawbacks, and is as follows.

(1) A container lid plate having a spout hole, a covering piece (hereinafter referred to as a seal tab) that covers the spout hole and its surroundings to seal it, and a covering piece (hereinafter referred to as a seal tab) that extends from the seal tab. interposed between the knob, the container lid plate and the seal tab around the spout hole, and between the container lid plate and the knob in a dot or line shape to the extent that the knob is prevented from being inverted or bent. An easy-to-open lid characterized by comprising an adhesive layer that makes the lid easy to open.

(2) A container lid plate having a spout hole, a seal tab that covers the spout hole and its surroundings to seal the spout hole, a knob extending from the seal tab, and a knob extending from the seal tab; an adhesive layer interposed between the container lid plate and the seal tab around the spout hole, and the shape of the adhesive layer does not form a straight line at the boundary between the sealing part and the knob part, and the spout hole An easy-to-open lid characterized by forming a shape in which the area gradually increases toward .

(3) A container lid plate having a spout hole, a seal tab that covers the spout hole and its surrounding area to seal off the spout hole, a knob extending from the seal tab, and a lid plate for the spout. an adhesive layer interposed between the container lid plate and the seal tab around the spout hole, the knob extending from the seal tab is arranged at the center of the container lid plate, and the spout hole are arranged at a predetermined distance from the periphery on a radiation line from the center of the container lid plate to the periphery.

The present invention will be further explained based on embodiments shown in the drawings.

Embodiment 1 FIG. 1(A) is a plan view showing an example of the easy-to-open lid of the present invention (1), FIG. 1(B) is a cross-sectional view taken along line A-A in FIG.
FIG. 1(c) is a longitudinal cross-sectional view of the cylindrical container showing the easy-to-open lid of the present invention with the seal tab removed.

In the figure, 1 is a container lid plate, and %2 is a pouring hole.

The container lid plate can be manufactured from an aluminum plate, a tin plated steel plate, a tin-free steel plate, etc., and in the case of one example, it is an aluminum plate. Reference numeral 3 denotes a seal tab, which can be manufactured from aluminum foil, a thin synthetic resin plate, a thin iron plate, paper, or a composite material thereof. In this example, the seal tab is made of aluminum foil and is laminated with a resin film 4. The sealing tab 3 that is clearly visible in the figure is attached to the container lid plate 1 by adhesive N5 at the periphery 2' of the spout hole 2.
Along with the adhesive part 3' adhered to the adhesive part 3', a part 3 of the knob part 3N extending from the adhesive part 3' is also adhered to the container lid plate 1 in a spot manner by means of the adhesive layer 5. 1
It is prevented from turning over and bending.

In FIG. 1(C)K, 6 is a cylindrical container with the container lid plate 1 wrapped around it. 7 is a carriage for covering the spout hole 2 after opening by peeling off the seal tab 3.

Embodiment 2 FIG. 2(a) is a plan view showing an example of the easy-to-open lid of the present invention (2), and FIG. 2(b) is a plan view showing a conventional method.

In this example, container lid plate 1. The configurations of the spout hole 2 and the seal tab 3 are the same as in Example 1, but the configuration of the adhesive layer 5 is different from Example 1.

In Example 1, as shown in FIG. 1(a), the spout hole 2
The adhesive layer 5 on the periphery 2' of the adhesive layer 5 bonding the adhesive portion 3' of the sealing tab 3 to the container lid plate 1 is similar to that shown in FIG. 7-The shape of the tab 3 at the boundary with the free knob 3N extending from the adhesive part 3' is a straight line (2), whereas the embodiment of the present invention (2) In Fig. 2 (a) showing the border, when the heel knob 3 is pulled and peeled off, the length of the peeling line gradually increases from point 2' at the peak to the length t at the foot of the mountain. This is because it is configured.

Therefore, the force for peeling off the seal tab 3 of this example starts from zero and gradually increases to a force corresponding to the initial movement length t of the conventional method, which has the effect of making it much easier to peel off.

Embodiment 3 FIG. 3 is a plan view showing an example of the easy-to-open lid of the present invention (3).

This example differs from Examples 1 and 2 with respect to the arrangement of the pouring hole 2 of the container lid plate 1.

In the figure, the spout hole 2 of the container lid plate 1 is arranged at a predetermined distance inward from the periphery 8 (counter sink wall) on the radiation 11 from the center of the container lid plate 1 to the periphery 8. The adhesive layer 5 is sandwiched on the periphery 2' of the seal tab 3, and the adhesive part 3' of the seal tab 3 is overlapped with the seal punch 9 having a circular hole 10 in the center.

That is, in this example, there is no need to align the seal tab 3 and the seal punch 9 at all, and it is only necessary to press the seal punch 9 regardless of the angle thereof, so that the work is extremely easy.

Example 4 This example relates to the manufacturing method of the above three lids (i) and (2L (3)).

The trap for adhering the seal tab 3 to the container lid plate 1 is made by punching out the seal tab 3 from an aluminum foil original plate with an adhesive layer 5 applied to the back side using a seal/gronch punch, placing it on the lid plate holder, and heating it. The seal tab 3 is lowered onto the lid plate 1 with the adhesive layer 5 facing downward, and the seal tab 3 is pressed with a seal of 7 cm, and the adhesive is heated and the temperature is raised to bond.

In this case, since the seal tab punch also functions as a seal punch for heating and compressing the seal tab, the temperature of the seal tab punch is increased by heat conduction.

When the temperature of the seal tab punching nozzle rises, it expands and the fit with the die cutting edge becomes misaligned, and the hardness of the cutting edge decreases, reducing the cutting force. Pulling work becomes impossible.

However, it is important to align the lid plate l and the seal tab 3.

It is extremely disadvantageous to stop using the seal tab punch and the seal punch in common in order to avoid an increase in process steps.

The present invention (4) provides a method for solving this problem.

That is, in the present invention (4), as shown in the longitudinal cross-sectional view in FIG. ), and if necessary, an airway C is provided inside the blade to suck in cold air to cool the cutting edge.

As a result, even if the punch is used in combination with the sealing punch, the heat of the cover plate 1 is not transferred to the punch and does not rise in temperature, so no problems occur due to the increase in temperature of the punch, and the heat is supplied to the cover plate 1 at the same time. Since heat is not absorbed by the punch, the adhesive layer can be heated to a higher temperature and bonding can be accomplished quickly.

Example 5 This example shows another invention example of the manufacturing method of the above three lids (1), (2), and (3).

In order to adhere the seal tab 3 to the container lid plate 1, the seal tab is punched out from the aluminum foil original plate using a punch in the first step, and the seal tab is immediately lowered and brought into contact with the heated lid plate, and then pressed with the punch. The sealing tab is bonded onto the lid plate by heating the adhesive layer and raising its temperature.The first step, the punching hole, is primarily responsible for punching out the sealing tab from the original aluminum foil sheet. It is necessary to press the material onto the heated lid plate for a long time to achieve a sufficient sealing distance of 7 cm.It is necessary to avoid heating and increasing the temperature and hindering the punching operation, so the progress of the line must be avoided. During the ridge connection process, the seal tab is repeatedly pressed onto the lid plate until the sealing process is completed at 7 cm.

In this case, it is necessary to ensure that the seal tab and the lid plate are adhered in the areas where adhesion is required, and not at all in areas where adhesion is not required. It requires alignment with the toseal tab, which complicates the work. This is done by applying a wide layer of adhesive to the side of the seal tab facing the lid plate, pressing the seal tab from the front side of the seal tab with a seal punch with an area corresponding to the area required for adhesion, heating it up, and creating an adhesive effect. This is because

Therefore, in the present invention, an adhesive layer having the exact shape of the part required for adhesion is applied and formed on the side of the seal tab facing the lid plate, and then the entire surface of the seal tab is pressed using a seal punch larger than the seal tab. The method is characterized in that the temperature of the adhesive is increased by heating to complete the adhesion.

According to the present invention, there is no need to align the seal tab and seal punch at all, and the work is not only significantly easier, but also
It has the advantage that necessary parts are always glued and unnecessary parts are never glued. In this case, if an undercoat is applied to the part of the back surface of the seal tab where there is no adhesive layer, it is effective to ensure that there is no adhesive in this part and to prevent rusting.

[Brief explanation of the drawing]

FIG. 1(A) is a plan view showing an example of the easy-to-open lid of the present invention (1), FIG. 1(B) is a cross-sectional view taken along line A-A in FIG.
FIG. 1(C) is a vertical cross-sectional view including the cylindrical container showing a state in which the seal tab of the easy-to-open lid of the present invention (1) has been peeled off;
Figure <1) is a plan view showing an example of the easy-to-open lid of the present invention (2), and Figure 2 (b) is a plan view showing a conventional method. FIG. 3 is a plan view showing an example of the easy-to-open lid of the present invention (3), and FIG. 4 is a longitudinal sectional elevational view of the punching/ξ punch used in carrying out the present invention (4). DESCRIPTION OF SYMBOLS 1... Container lid plate, 2... Pour hole % 3... Seal tab, 4... Resin film, 5... Adhesive layer, 6...
Cylindrical container, 7... Cap, 8... Counter sink wall, 9... Seal punch, 10... Punch circular hole,
11...Radiation, a...Blade edge, b...Insulating material, C
...Respiratory tract. Agent Patent attorney Masaaki Akizawa Mitsugai 2 people△] UYl Figure (A) 7? I i (v Hunra Y) Ji4 (c) Urz diagram (Inho 2 Seki (b) *3 Inukai 4 diagram

Claims (5)

[Claims] (1) A container lid plate having a spout hole, a covering piece (hereinafter referred to as a seal tab) that covers the spout hole and its surroundings to seal it, and a covering piece (hereinafter referred to as a seal tab) that extends from the seal tab. interposed between the knob, the container lid plate and the seal tab around the spout hole, and between the container lid plate and the knob in a dot or line shape to the extent that the knob is prevented from being inverted or bent. An easy-to-open lid characterized by comprising an adhesive J@. (2) A container lid plate having a spout hole, a seal tab that covers the spout hole and its surrounding area to seal the spout hole, a knob extending from the seal tab, and a lid plate for the spout. an adhesive layer interposed between the container lid plate and the seal tab around the spout hole, and the shape of the adhesive layer does not form a straight line at the boundary between the sealing part and the knob part, and the spout hole An easy-to-open lid characterized by forming a shape in which the area gradually increases toward . (3) a container lid plate having a spout hole; a seal tab that covers the spout hole and its surroundings to seal the spout hole;
A knob extending from the seal tab and an adhesive layer interposed between the container lid plate around the spout hole and the seal tab, the knob extending from the seal tab being attached to the container lid. An easy-to-open lid characterized in that the plate is located at the center of the plate, and the spout hole is located at a predetermined distance from the periphery on a radial line from the center to the periphery of the container lid plate. (4) A container lid plate having a spout hole, a covering piece (hereinafter referred to as a seal tab) that covers the spout hole and its surroundings to seal the spout hole, and a covering piece (hereinafter referred to as a seal tab) that extends from the seal tab. interposed between the knob, the container lid plate and the seal tab around the spout hole, and between the container lid plate and the knob in a dot or line shape to the extent that the knob is prevented from being inverted or bent. or an easy-to-open lid comprising an adhesive layer. A container lid plate having a spout hole, a seal tab that covers the spout hole and its surroundings to seal the spout hole, a knob extending from the seal tab, and a surrounding area of the spout hole. an adhesive layer interposed between the container lid plate and the seal tab;
and an easy-to-open lid, in which the shape of the adhesive layer does not form a straight line at the boundary between the sealing part and the knob, but gradually increases in area toward the spouting hole. A container lid plate having a spout hole, a seal tab that covers the spout hole and its surroundings to seal the spout hole, a knob extending from the seal tab, and the spout hole. an adhesive layer interposed between the peripheral container lid plate and the seal tab, the knob extending from the seal tab is located at the center of the container lid plate, and the spout hole is located at the center of the container lid plate. In manufacturing the easy-to-open lid, which is arranged at a predetermined distance from the periphery in a radiation line from the center to the periphery of the lid plate, a sealing tab is punched out using a punch having a heat insulating material layer on the lower surface, and the sealing tab is punched out on a heated pedestal. A method for manufacturing an easy-to-open lid, characterized in that the sealing tab is pressed onto the upper surface of a container lid plate to heat the adhesive and prevent the punch from heating. (5) A container lid plate having a spout hole, a covering piece (hereinafter referred to as a seal tab) that covers the spout hole and its surroundings to seal the spout hole, and a covering piece extending from the seal tab. interposed between the knob, the container lid plate and the seal tab around the spout hole, and between the container lid plate and the knob in a dot or line shape to the extent that the knob is prevented from being inverted or bent. or an easy-to-open lid comprising an adhesive layer. A container lid plate having a spout hole, a seal tab that covers the spout hole and its surroundings to seal the spout hole, a knob extending from the seal tab, and a surrounding area of the spout hole. an adhesive layer interposed between the container lid plate and the seal tab;
and an easy-to-open lid in which the shape of the adhesive layer does not form a straight line at the boundary between the sealing part and the knob part, but has a saddle shape in which the area gradually increases toward the spouting hole. A container lid plate having a spout hole, a seal tab that covers the spout hole and its surroundings to seal the spout hole, a knob extending from the seal tab, and the spout hole. and an adhesive layer interposed between the peripheral container lid plate and the seal tab, and the knob extending from the seal tab is disposed in the center of the container lid plate. and an easy-to-open lid in which the spout hole is arranged at a predetermined distance from the periphery on a radiation line from the center of the container lid plate to the periphery. Use a seal tab with an adhesive layer only on the back side that corresponds to the point or line bonding part for preventing bending, and press the seal tab to the top surface of the container lid plate using a seal punch that is thicker than the seal tab. Features a manufacturing method for easy-to-open lids.