JP3351877B2 - Can lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can lid for hygienically and easily opening a can container for storing weighed contents, for example, powdered food such as milk powder.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 14 (a) and 14 (b), as a can lid of a can container for accommodating powdered food such as milk powder, the periphery of an opening 52 of a metal lid frame 51 is shown. There is known a can lid 50 in which a synthetic resin frame 53 is provided integrally by injection molding.

An opening 52 of this type of can lid 50 is sealed by a top surface sealing material 54 made of metal foil coated with a synthetic resin. At this time, the top surface sealing material 54 is peelably adhered to the top of the frame 53. Further, in order to facilitate weighing when the powdered food such as milk powder as a content is weighed with a measuring spoon (not shown) and taken out, the frame 53 is provided with a bar-shaped slicing material across the opening 52. A member 55 is provided integrally with the frame 53.

However, in recent years, can containers discarded after use have been separated by material and recycled. The can lid 50 has a metal lid frame 51 integrally formed with a synthetic resin frame 53. , The lid frame 51 and the frame 53 must be separated at the time of recycling, and there is a disadvantage that the separation operation is troublesome.

In order to solve the above-mentioned inconvenience, it is considered that the frame 53 is not provided on the lid frame 51, but according to this, the peripheral edge of the opening 52 of the lid frame 51 is Exposure to That is, in the can lid 50, the frame 53 is provided on the lid frame 51, and the peripheral edge of the lid frame 51 facing the opening 52 is sealed by the frame 53, but the frame 53 is provided on the lid frame 51. If not, the peripheral edge of the lid frame 51 is exposed, and rust or the like may be generated from the peripheral edge.

When the frame 53 is not provided on the lid frame 51, the top sealing material 54 must be directly thermally bonded onto the panel portion 56 of the lid frame 51, so that the top sealing material 54 is used. It becomes difficult to seal the opening 52. That is, in the can lid 50, the frame 53 is attached to the lid frame 51.
By providing the same material for the frame 53 and the synthetic resin coated on the top sealing material 54, the top of the frame 53 and the top sealing material 54 are thermally bonded to each other to ensure that the opening 52 Is sealed.

Further, the bar-shaped scraping member 55 is formed integrally with the frame 53. However, when the frame 53 is not provided, there is a disadvantage that it is difficult to provide the bar-shaped scraping member 55.

On the other hand, in the case of powdered milk containers, the Ministry of Health and Welfare Ordinance No. 52 of December 27, 1951 based on the Food Sanitation Law, “Ministerial ordinance on the specification of ingredients of milk and dairy products (abbreviated name, ordinance of milk etc.)”
Therefore, the material of the portion that directly contacts the milk powder is limited. Furthermore, in the case of powdered foods other than milk powder, it is necessary to take into consideration the food hygiene of the material in the portion that comes into direct contact with the contents.

Therefore, also in this type of can lid 50, the support frame 53 is formed by tinplate, and the frame 53, the top surface sealing material 54 and the bar-shaped scraping member 55 are formed.
Is made of a polyethylene resin or a polyethylene terephthalate resin conforming to the standards of ministerial ordinances such as milk so that it can be adapted to milk powder.

However, since the lid frame 51 and the frame 53 are made of different materials, a step of injection-molding the frame 53 on the lid frame 51 is required at the stage of manufacturing the lid frame 51, which lowers the working efficiency. In addition, there is an inconvenience that an apparatus for manufacturing the can lid 50 is complicated.

Further, it is difficult to reliably perform thermal bonding between the tinplate panel portion 56 and the polyethylene resin or polyethylene terephthalate resin coated on the top surface sealing material 54, and the sealing of the opening 52 by the top surface sealing material 54 is insufficient. There is an inconvenience. Therefore, the panel portion 56 and the top surface sealing material 54
It is conceivable that the adhesive is securely bonded through an adhesive, but in this case, there is a possibility that the milk powder inside the can container comes into contact with the adhesive at the bonding portion between the panel portion 56 and the top surface sealing material 54, It is not suitable as a can lid for a can for milk powder. Also,
It is also conceivable that a polyethylene resin or a polyethylene terephthalate resin is adhered to the surface of the panel portion 56 to form a resin coating, so that the panel portion 56 and the top surface sealing material 54 can be reliably thermally bonded. At this time, the panel 56
And the polyethylene resin or polyethylene terephthalate resin may be bonded by heating, or may be bonded through an adhesive. In the former case, the panel portion 56 and the top surface sealing material 54 are bonded to each other. Like gluing,
It is easily peeled due to poor adhesion, and in particular, there is a risk of peeling during the steps of pressing, curling, winding and the like during the manufacture of the can lid. In the latter case, although the adhesive force is strong, the peripheral edge of the lid frame 51 is exposed by not providing the frame 53, so that the polyethylene resin or polyethylene is applied to the panel portion 56 located at the edge. There is a possibility that the milk powder inside the can container comes into contact with the adhesive at the bonding portion of the terephthalate resin, and is not suitable as a can lid for a milk powder can container.

[0012]

The present invention solves such inconveniences, and the present invention is easy to open and rust is reliably prevented from being generated at the edge of the opening of the lid frame. It is an object of the present invention to provide a can lid suitable for a can for milk powder because it can be recycled and can easily measure a spoon.

[0013]

In order to achieve the above object, the present invention provides a curl portion on an outer peripheral edge for winding around a can container, and an opening inside a panel portion surrounded by the outer peripheral edge. Portion, a synthetic resin film is coated and adhered to at least the upper surface of the panel portion, and the entire peripheral edge of the panel portion facing the opening is rolled up and folded, and the entire peripheral edge is sealed therein. A folded portion is formed and the synthetic resin film is heat-bonded, and the entire peripheral edge is sealed.A metal lid frame, and the lid frame is peelably bonded to a panel portion of the lid frame. A can lid made of a metal foil top surface sealing material covered with a synthetic resin film that seals an opening, and a synthetic resin scraper having a locking portion that is removably locked to the folded portion. The member is provided so as to span the opening. And it features.

When the contents contained in the can container are powdered foods, the top sealing material is formed by covering the surface of an aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and The surface facing the inside of the can container, which is the lower surface, is formed by tinplate and the upper surface is provided with a coating of a polyethylene resin film or a polyethylene terephthalate resin film, and the scraping member is formed of polyethylene resin or polyethylene terephthalate resin. Features.

When the contents contained in the can container are powdered foods, the top surface sealing material is formed by covering the surface of an aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and A coating made of a polyethylene resin film or a polyethylene terephthalate resin film is provided on both upper and lower surfaces thereof, and the sliding member is formed of a polyethylene resin or a polyethylene terephthalate resin.

Further, the powdered food of the content stored in the can may be milk powder.

[0017]

In the can lid of the present invention, the entire peripheral edge of the opening of the lid frame is rolled up and folded to form a folded portion, and by forming the folded portion, the synthetic resin films which come into contact with each other are formed. It is formed by sealing by heating and sealing the entire peripheral edge of the panel portion facing the opening inside the folded portion, so that the contact between the entire peripheral edge and the contents is reliably prevented and rust is prevented. Further, the locking portion of the sliding member is removably locked to the folded portion, so that the synthetic resin sliding member is fitted to the opening of the metal lid frame. It is provided and easily removed after use to facilitate separation by material during recycling.

Further, the material for covering the surface of the aluminum foil of the top surface sealing material, the material for the film for forming the coating on the upper and lower surfaces of the lid frame, and the material for the scraping member are defined by the standards of ministerial regulations such as milk. By using a polyethylene resin or a polyethylene terephthalate resin suitable for powdered foods, it is suitable for powdered foods, especially milk powder.

Further, when the lid frame is made of tin, even if a polyethylene resin film or a polyethylene terephthalate resin film is adhered to the upper surface of the lid frame with an adhesive to form a coating, the adhesive may be exposed. Since the peripheral edge of the panel portion facing the opening is sealed in the folded portion, contact between the adhesive and the powdered food inside the can container is reliably prevented, so that the can containing powdered food as a content It is possible to firmly apply a coating of a polyethylene resin film or a polyethylene terephthalate resin film to a tin lid frame that is compatible with the container. This makes it possible to securely bond the ceiling sealing material having the surface of the aluminum foil covered with the polyethylene resin film or the polyethylene terephthalate resin film by heating through the coating of the panel portion.

Further, when the lid frame is made of a metal other than tinplate, for example, aluminum or tin-free steel, the upper and lower surfaces are coated with a polyethylene resin film or a polyethylene terephthalate resin film to form a powder. Compatible with body foods, especially cans containing milk powder. At this time, even if a coating of a polyethylene resin film or a polyethylene terephthalate resin film is applied to the lid frame via an adhesive, the surface of the metal forming the lid frame is not exposed by the coating.
Further, since the adhesive or the metal at the peripheral edge of the panel facing the opening is sealed in the folded portion, the metal forming the lid frame and the powdered food inside the can container are reliably prevented from contacting. .

Further, by providing a tab for a peeling opening at the outer peripheral edge of the top surface sealing material, the tab can be easily gripped when the top surface sealing material is peeled, thereby facilitating the peeling operation.

[0022]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a can lid according to one embodiment of the present invention, FIG. 2 is an explanatory view showing a part of the can lid of FIG. 1, and FIG. 3 (a) is a main part of FIG. FIG. 3 is an enlarged view of FIG.
FIG. 4B is an explanatory view showing another example of FIG. 3A, and FIG.
FIG. 4B is an explanatory view showing a locking portion of the bar-shaped cutting member, and FIG.
5 is an explanatory view showing a locking portion of another bar-shaped cutting member, FIG. 5 is an explanatory view showing another example of FIG. 2, FIG. 6 is an explanatory view illustrating a part of the configuration and operation of FIG. 5, and FIG. FIG. 8 is an explanatory view showing another example of FIG. 2, FIG. 8 is an explanatory view showing a part of a can lid of another example cut away, FIG. 9A is an explanatory view showing an enlarged main part of FIG. 9B is an explanatory view showing another example of FIG. 9A, FIGS. 10 and 11 are explanatory views showing another example of FIG. 8, and FIG. 12 is an explanatory view showing another example of FIG. FIG. 13 is an explanatory view showing a part of the can lid of FIG.

The can lid 1 is mounted on a can container X, and as shown in FIG. 1, a tin lid frame 2 and a top plate detachably provided on the lid frame 2. And a face sealing material 3.

As shown in FIG. 2, the lid frame 2 includes a curl portion 4 for winding around a can X, a panel portion 5 extending inward from the curl portion 4, and a panel portion 5 extending inward from the curl portion 4. And a circular opening 6 formed at a peripheral portion of the opening 6. The lid frame 2 extends from the outer peripheral edge of the curl portion 4 to the inner peripheral edge of the opening 6.
As shown in FIG. 3A, a coating 8 is applied to the entire upper surface. The coating 8 has a polyethylene resin film adhered to the surface of the lid frame 2. At this time, the film may be bonded to the surface of the lid frame 2 made of tin in a case where the film is bonded by heating or a case where the film is bonded through an adhesive. In the former case, the polyethylene resin film is used. In this embodiment, the latter case is adopted, and an epoxy resin or the like is used as the adhesive.
By using a phenol-based resin or an epoxy-urea-based resin, etc., strong adhesion can be achieved. Accordingly, peeling of the coating film 8 from the lid frame 2 can be reliably prevented particularly in each step such as pressing, curling, and winding when manufacturing the can lid. As will be described later, FIG.
As shown in (b), the coating 8 may be applied not only on the upper surface side of the lid frame 2 but also on both the upper surface side and the lower surface side.

As shown in FIG. 2, the entire periphery of the top surface sealing material 3 is adhered to the upper part of the periphery of the opening 6 by heating, whereby the opening 6 is closed. ing. The top surface sealing material 3 is formed of aluminum foil whose upper surface side and lower surface side are covered with a polyethylene resin film, and as shown in FIG. And a tab 10 extending outward from a part of the periphery of the closing portion 9. The tab 10 is provided to be folded from the boundary of the closing portion 9 to the upper surface side of the closing portion 9. Accordingly, the tab 10 can be formed to have a relatively large size, so that the tab 10 does not become a hindrance at the time of operations such as winding, and can be easily gripped during the opening operation.

The folded portion 7 of the opening 6 is formed as shown in FIG.
As shown in the figure, the peripheral edge 5 of the panel portion 5 facing the opening 6
a is wound down and folded back. At this time, the folded part of the folded part 7 overlaps with a part of the lower surface of the panel part 5 as shown in FIG. And
Since the entire surface on the upper surface side of the lid frame 2 from the outer peripheral edge of the curl portion 4 to the peripheral edge 5a of the panel portion 5 is coated with the polyethylene resin film 8, the above polymerized portion is coated with the coating 8 8 are interposed. The polymerized portions are heated and adhered to each other through the coating 8, whereby the peripheral edge 5 a of the panel portion 5 is sealed inside the folded portion 7. Thereby, the peripheral edge 5a of the panel portion 5 is not exposed, so that not only the generation of rust and the like can be reliably prevented, but also the adhesive exposed from the tip of the peripheral edge 5a of the panel portion 5 can be used. Since the contact with the milk powder, which is the content, is reliably prevented, it can be adapted to a milk powder can container. Further, since the polyethylene resin film as the coating 8 on the upper surface of the lid frame 2 and the polyethylene resin film coated on the surface of the top sealing material 3 are easily bonded, the opening 6 is closed by the top sealing material 3. It is possible to securely and firmly close the container.

As shown in FIG. 3B, even when the coating 8 is applied to both the upper surface and the lower surface of the lid frame 2, the folded part of the folded portion 7 is formed on the panel. When superposed on a part of the lower surface of the portion 5, the coating 8a on the lower surface of the panel portion 5 and the coating 8b on the folded portion come into contact with each other, and can be easily bonded to each other by heating. Peripheral edge 5
a can be reliably contained in the folded portion 7. In addition, in this case, since the lid frame 2 is entirely covered with the coating 8, the material of the lid frame 2 is not limited if the coating 8 is formed of a polyethylene resin film. Even if the lid frame 2 is formed using free steel or the like, it can be sufficiently adapted to a can container.

Further, as shown in FIGS. 1 and 2, the opening 6 has a bar-shaped scraping member 11 which crosses inward.
Is provided. The bar-shaped cutting member 11 is formed of a polyethylene resin, and has, at both ends thereof, locking portions 12 each having a U-shaped cross section for locking the folded portion 7 as shown in FIG. The locking portion 12 is provided with a claw portion 13 which detachably engages with a valley portion 7a formed at the boundary between the folded portion 7 and the lower surface of the panel portion 5 along the upper edge of the tip side. This prevents the can X from falling into the inside of the can X. Further, the rod-shaped scraping member 11
For example, a measuring spoon or the like (not shown) is brought into contact with the lower portion of the container when the container is rubbed, so that the container can be easily removed by pressing from above when disposing the container X without dropping into the container X. Can be. Therefore, when recycling the can lid 1, the metal lid frame 2 and the synthetic resin rod-shaped scraping member 11 can be easily separated.

Further, the rod-shaped scraping member 11 does not need to include the claw portion 13 in the locking portion 12 thereof, as shown in FIG.
As shown in (b), the upper ends of the side walls 12a of the locking portion 12 are separated from each other by forming one of the side walls 12a to be inclined so that the upper ends of the pair of opposite side walls of the locking portion 12 approach each other. The locking portion 12 may be resiliently engaged with the folded portion 7 by utilizing an elastic restoring force generated when the locking portion 12 is made.

Further, as shown in FIGS. 12 and 13,
Instead of the rod-shaped cutting member 11, a plate-shaped cutting member 11a covering a part of the opening 6 may be used. The plate-shaped scraping member 11a is provided with a locking portion 12 having a U-shaped cross section similar to the bar-shaped scraping member 11 shown in FIGS. Peripheral edge 5
A plurality is provided on the side along a. The plate-shaped scraping member 11a uses one end edge thereof as a scraping portion.
Such a plate-shaped scraping member 11a also helps to prevent foreign substances from dropping during the scraping.

As shown in FIG. 5, it is preferable that the panel portion 5 of the lid frame 2 is provided with an annular convex portion 14 projecting upward along the opening 6. The top surface sealing material 3 is heated and pressurized on the tops of the projections 14, so that the heat distribution during heating can be regulated by the projections 14. Further, the top surface sealing material 3 and the panel Since the range of adhesion with the portion 5 is limited to the top of the convex portion 14, the top surface sealing material 3 is securely bonded onto the panel portion 5 and the top surface sealing material 3 from the panel portion 5 is removed. Peeling can be easily performed.

Further, as shown in FIG. 6A, a cut 1 is formed in the coating 8 along both side edges of the top of the projection 14.
Preferably, 5 and 16 are formed. That is, the top surface sealing material 3 is adhered to the coating 8c between the cut portions 15 and 16, so that the panel portion 5 is opened when the closing portion 9 is opened.
As shown in FIG. 6B, when the top sealing material 3 is peeled off from the upper surface, the coating 8c between the cut portions 15 and 16 is adhered to the back surface of the top sealing material 3, and 14, the top sealing material 3 can be easily peeled off even if the top sealing material 3 is firmly adhered to the top of the convex portion 14. The appearance of the peeling marks on the panel portion 5 after the peeling is good.

Further, as shown in FIG.
May be projected above the panel portion 5 to form the convex portion 14.

Further, also in the convex portion 14 shown in FIG. 7, the bar-shaped cutting member 11 shown in FIG. 4B is provided so as to be engaged with the folded portion 7, and the cut portions 15 and 16 shown in FIG. Preferably, it is formed.

Further, as shown in FIG.
May be formed by winding the peripheral edge 5a of the panel portion 5 upward and folding it. When the coating 8 is applied only to the upper surface side of the lid frame 2, the folded portion 7 also
As shown in (a), the folded part overlaps a part of the upper surface of the panel unit 5. The coating 8 is interposed in the polymerized portion. By heating and adhering the above polymerized portions to each other through the coating 8, the peripheral edge 5 a of the panel portion 5 can be sealed in the inside of the folded portion 7. 8 and the polyethylene resin film coated on the surface of the top surface sealing material 3 can be easily bonded. In this case, the bar-shaped cutting member 11 shown in FIG.

Further, as shown in FIG. 9B, even when the coating 8 is applied to both the upper surface side and the lower surface side of the lid frame 2, the folded part of the folded portion 7 is not removed. When a part of the upper surface of the panel portion 5 is superimposed, the coating 8 on the upper surface of the panel portion 5
The b and the folded portion of the coating 8a come into contact with each other and can be easily bonded to each other by heating, so that the peripheral edge 5a of the panel portion 5 can be securely sealed in the inside of the folded portion 7.

Further, as shown in FIG.
If the annular convex portion 14 protruding upward along is provided, and the top surface sealing material 3 is adhered to the top portion of the convex portion 14 by applying heat and pressure, similar to the convex portion 14 shown in FIG. Dispersion of heat at the time of heating can be regulated by the convex portion 14, and furthermore, the range of adhesion between the top surface sealing material 3 and the panel portion 5 is limited to the top portion of the convex portion 14. Seal material 3
Is securely adhered to the panel portion 5 and the top surface sealing material 3 can be easily separated from the panel portion 5.

Further, as shown in FIG. 11, the convex portion 14 may be formed by projecting the folded portion 7 upward from the panel portion 5. However, in this case, it is essential to apply the coating 8 of the polyethylene resin film to at least the lower surface of the lid frame 2. Since the upper surface of the folded portion 7 shown in FIG. 11 was located on the lower surface side of the lid frame 2, there was no coating 8 on the top of the convex portion 14, and the coating 8 was applied only on the upper surface of the lid frame 2. In this case, the top surface sealing material 3 and the projection 1
This is because the adhesiveness with No. 4 becomes low. Therefore, the lid frame 2
When the folded portion 7 is formed so as to protrude above the panel portion 5 by applying a coating 8 of a polyethylene resin film to the lower surface of the base member, the adhesiveness between the top surface sealing material 3 and the convex portion 14 becomes sufficiently strong. In addition, a reliable sealing of the opening 6 by the top surface sealing material 3 can be obtained. Further, it goes without saying that the cut portions 15 and 16 shown in FIG.

In the above embodiment, the material for coating the surface of the top sealing material 3, the material for the coatings 8 on the upper and lower surfaces of the lid frame 2, and the rod-shaped scraping member 11
Alternatively, the material of the plate-shaped scraping member 11a and the like is made of a polyethylene resin conforming to the standards of the Ministerial Ordinance for Milk and the like. However, by using the polyethylene terephthalate resin as the material, the material can be adapted to a can for milk powder. Further, when the contents are other than dairy products such as milk powder, it goes without saying that the materials of the above-mentioned parts are not limited.

[0041]

As is apparent from the above description, according to the present invention, the synthetic resin coated on the surface of the lid frame by the folded portion being folded around the entire peripheral edge of the panel portion. Since the film-making film is heat-bonded and the entire peripheral edge is sealed inside the folded portion, it is possible to reliably prevent the contents from contacting the entire peripheral edge and to reliably prevent the generation of rust and the like. be able to. Further, by providing the folded portion, the flap member is locked to the flap portion so that the locking portion can be detachably engaged, and a flap member made of synthetic resin is provided at the opening of the metal lid frame. In addition, it can be easily removed after use to easily separate materials by recycling.

Further, the material for covering the surface of the aluminum foil of the top surface sealing material, the material for the film for forming the coating on the upper and lower surfaces of the lid frame, and the material for the scraping member are stipulated by ministerial ordinance standards. By using a polyethylene resin or a polyethylene terephthalate resin compatible with milk powder, it can be adapted to milk powder. Further, when the lid frame body is made of tin, even if a film is formed by bonding a polyethylene resin film or a polyethylene terephthalate resin film to the upper surface thereof through an adhesive, the adhesive may be exposed. Since the entire peripheral edge is sealed in the folded portion, the contact between the adhesive and the milk powder inside the can container is reliably prevented, so that the tin lid frame adapted to the can container containing milk powder is used. A coating of a polyethylene resin film or a polyethylene terephthalate resin film can be firmly applied to the body. This makes it possible to obtain high hermeticity by securely bonding the ceiling sealing material having the surface of the aluminum foil covered with the polyethylene resin film or the polyethylene terephthalate resin film by heating through the coating of the panel portion. .

When the lid frame is made of a metal other than tin, such as aluminum or tin-free steel, the upper and lower surfaces of the lid frame are coated with a polyethylene resin film or a polyethylene terephthalate resin film. Can be adapted to a can. At this time, even if a coating of a polyethylene resin film or a polyethylene terephthalate resin film is provided on the lid frame via an adhesive, the surface of the metal forming the lid frame is not exposed by the coating.
Further, since the adhesive or the metal at the peripheral edge of the panel portion is sealed in the folded portion, the contact between the metal forming the lid frame and the powdered milk inside the can can be reliably prevented.

Therefore, according to the present invention, the generation of rust and the like on the peripheral edge of the panel portion of the lid frame is reliably prevented, the recycling is possible, and the spoon measurement is easy. In particular, a can lid suitable for a can for milk powder can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a can lid according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a part of the can lid of FIG.

FIG. 3A is an explanatory view showing an enlarged main part of FIG. 2;
(B) is an explanatory view showing another example of (a).

FIG. 4A is an explanatory diagram showing a locking portion of a bar-shaped cutting member, and FIG. 4B is an explanatory diagram showing another locking portion of the bar-shaped cutting member.

FIG. 5 is an explanatory view showing another example of FIG. 2;

FIG. 6 is an explanatory diagram illustrating a part of the configuration and operation of FIG. 5;

FIG. 7 is an explanatory view showing another example of FIG. 2;

FIG. 8 is an explanatory view showing a part of a can lid of another example in a cutaway manner.

FIG. 9A is an explanatory view showing an enlarged main part of FIG. 8,
(B) is an explanatory view showing another example of (a).

FIG. 10 is an explanatory view showing another example of FIG. 8;

FIG. 11 is an explanatory view showing another example of FIG. 8;

FIG. 12 is an explanatory view showing another example of FIG. 1;

FIG. 13 is an explanatory view showing a part of the can lid of FIG.

FIG. 14A is an explanatory plan view showing a conventional can lid,
FIG. 2B is an explanatory view showing a main part of FIG.

[Explanation of symbols]

X: can container, 1 ... can lid, 2 ... lid frame, 3 ... top surface sealing material, 4 ... curl portion, 5 ... panel portion, 6 ... opening portion, 7 ... folded portion, 8 ... coating, 10 ... tab Reference numeral 11 denotes a bar-shaped cutting member, 11a denotes a plate-shaped cutting member, and 12 denotes a locking portion.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyasu Tanaka 839-1 Shimuro, Iwatsuki-shi, Saitama Prefecture (56) References JP-A-4-352641 (JP, A) Shokai Sho62 -168324 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 17/00-17/50

Claims (4)

(57) [Claims] 1. A curl portion for winding around a can container is provided on an outer peripheral edge portion, an opening is formed inside a panel portion surrounded by the outer peripheral edge portion, and a synthetic resin film is formed on at least the upper surface of the panel portion. Is coated and adhered, and the entire peripheral edge of the panel portion facing the opening is wrapped and folded to form a folded portion in which the entire peripheral edge is sealed, and the synthetic resin film is heat-bonded. And a metal lid frame whose entire peripheral edge is sealed, and a metal foil covered with a synthetic resin film that is releasably adhered to a panel portion of the lid frame and seals the opening. A can lid made of a top surface sealing material, wherein a synthetic resin scraping member provided with a locking portion that is removably locked to the folded portion is provided to extend over the opening. Can lid. 2. When the contents contained in a can container are powdered foods, the top surface sealing material is formed by coating the surface of an aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and The surface facing the inside of the can container, which is the lower surface, is formed by tinplate and the upper surface is provided with a coating of a polyethylene resin film or a polyethylene terephthalate resin film, and the scraping member is formed of polyethylene resin or polyethylene terephthalate resin. The can lid according to claim 1, characterized in that: 3. When the contents contained in the can container are powdered foods, the top surface sealing material is formed by covering the surface of an aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and 2. The can lid according to claim 1, wherein the upper and lower surfaces are provided with a coating made of a polyethylene resin film or a polyethylene terephthalate resin film, and the scraping member is formed of a polyethylene resin or a polyethylene terephthalate resin. 4. The can lid according to claim 2, wherein the powdered food contained in the can container is powdered milk.