JPH07101444A - Can lid - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to reliably prevent rust from occurring on the peripheral edge of the panel part of the lid frame, and it is possible to recycle it. Furthermore, it is also suitable for a can container for milk powder that can be easily measured with a spoon. Provide a can lid. [Structure] At least an upper surface of a panel portion 5 of a metallic lid frame 2 is coated with a synthetic resin film. A folding-back portion 7 is provided on the entire periphery of the panel portion 5 of the lid frame body 2 by folding back the peripheral edge thereof. The folded-back portion 7 is formed by folding the peripheral portion of the panel portion 5 upward or downward so that the end edge 5a is wound inside, and the folded-back portion is overlapped with the panel portion 5 and adhered via a coating to form an opening. Enclose the edge of 6 inside the folded part. A synthetic resin rod-shaped scraping member 11 is detachably attached to the opening 6. The opening 6 is openably sealed by the top sealing material 3 at least the lower surface of which is covered with a synthetic resin film.

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 weighing contents such as powdered food such as milk powder.

[0002]

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

In this kind of can lid 50, the opening 52 is sealed by a top sealing material 54 made of metal foil covered with synthetic resin. At this time, the ceiling sealing material 54 is releasably adhered to the top of the frame 53. In addition, in order to facilitate weighing when powdered food such as powdered milk, which is the content, is grated with a measuring spoon (not shown), the frame 53 is provided with a bar-shaped grate across the opening 52. A member 55 is provided integrally with the frame 53.

However, in recent years, can containers that have been discarded after use are sorted by material and recycled. In the can lid 50, a metal lid frame 51 and a synthetic resin frame 53 are integrated. Therefore, the lid frame body 51 and the frame 53 must be separated at the time of recycling, and there is a disadvantage that the separating work is troublesome.

In order to solve the above-mentioned inconvenience, it is conceivable that the lid frame 51 is not provided with the frame 53, but according to this, the peripheral edge of the opening 52 of the lid frame 51 is inside the can container. Exposed 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 enclosed by the frame 53, but the frame 53 is provided on the lid frame 51. If not present, the peripheral edge of the lid frame body 51 is exposed, so that rust or the like may occur from the peripheral edge.

If the lid frame 51 is not provided with the frame 53, the ceiling sealing material 54 must be directly heat-bonded onto the panel portion 56 of the lid frame 51. It becomes difficult to seal the opening 52. That is, in the can lid 50, the lid frame body 51 is connected to the frame 53.
By providing the frame 53 with the same material as the material of the synthetic resin with which the top surface sealing material 54 is coated, the top of the frame 53 and the top surface sealing material 54 are heat-bonded and the opening 52 is surely formed. Is sealed.

Further, although the rod-shaped scraping member 55 is formed integrally with the frame 53, it is difficult to provide the rod-shaped scraping member 55 when the frame 53 is not provided.

[0008] On the other hand, for powdered milk containers, the Ministry of Health and Welfare Ordinance No. 52 of Dec. 27, 1948, based on the Food Sanitation Law, "Ministerial Ordinance Concerning Constituent Standards of Milk and Dairy Products (abbreviation, Ministerial Ordinance for 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 powdered milk, it is necessary to consider food hygiene of the material of the portion which comes into direct contact with the contents.

Therefore, also in the can lid 50 of this type, the support frame 53 is formed by tin plate, and the frame 53, the ceiling sealing material 54, and the bar-shaped scraping member 55.
Is made of a polyethylene resin or a polyethylene terephthalate resin that conforms to the standards of the Ministerial Ordinance for Milk and the like so that it can be adapted to powdered milk.

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

Further, it is difficult to reliably heat-bond the tin plate panel 56 and the polyethylene resin or polyethylene terephthalate resin coated on the ceiling sealing material 54, and the sealing of the opening 52 by the ceiling sealing material 54 is insufficient. There is an inconvenience. Therefore, the panel portion 56 and the ceiling sealing material 54
Although it is conceivable to securely bond the and via an adhesive, in this case, the powdered milk in the can container may come into contact with the adhesive at the bonded portion between the panel portion 56 and the ceiling sealing material 54, It is not suitable as a can lid for a powder milk can container. 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 ceiling sealing material 54 can be surely heat-bonded. At this time, the panel portion 56
The polyethylene resin or the polyethylene terephthalate resin may be adhered by heating or may be adhered via an adhesive. In the former case, the panel portion 56 and the ceiling sealing material 54 are As with the adhesion of
Poor adhesion makes it easy to peel off, and in particular, there is a risk of peeling during the steps of pressing, curling, winding, etc. during the production of a can lid. Further, in the latter case, although the adhesive force is strong, the peripheral edge of the lid frame body 51 is exposed by not providing the frame 53. Therefore, the polyethylene resin or polyethylene for the panel portion 56 located at the edge is exposed. The powdered milk inside the can container may come into contact with the adhesive at the adhesive portion of the terephthalate resin, which is not suitable as a can lid of a can container for powdered milk.

[0012]

By solving such inconvenience, the present invention is easy to open, and is hygienic because it surely prevents rust from being generated at the edge of the opening of the lid frame, and moreover, is hygienic. An object of the present invention is to provide a can lid suitable for a container for powdered milk, which can be recycled and can be easily measured with a spoon.

[0013]

In order to achieve the above object, the present invention is provided with a curl portion for winding and tightening on a can container at an outer peripheral edge portion, and an opening is made inside a panel portion surrounded by the outer peripheral edge portion. Part is formed, a synthetic resin film is covered and adhered to at least the upper surface of the panel part, and the entire peripheral edge of the panel part facing the opening is wrapped and folded back to confine the entire peripheral edge inside. A metal lid frame body, in which a folded-back portion is formed, the synthetic resin film is heat-bonded and the entire peripheral edge is sealed, and the panel portion of the lid frame body is peelably bonded to the lid frame body. A can lid made of a metal foil top sealing material coated with a synthetic resin film that seals an opening, the synthetic resin scrap having a locking portion that is detachably locked to the folding portion. A member is provided so as to extend over the opening. And it features.

Further, when the contents to be stored in the can container are powdered foods, the ceiling sealing material is formed by coating the surface of the aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and the lid frame body is The lower surface of the container facing the interior of the can is formed by tinplate, and the upper surface thereof 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. Characterize.

When the contents to be stored in the can container are powdered foods, the ceiling sealing material is formed by coating the surface of the aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and the lid frame body is A coating film made of a polyethylene resin film or a polyethylene terephthalate resin film is provided on both upper and lower sides thereof, and the scraping member is formed of a polyethylene resin or a polyethylene terephthalate resin.

Further, the powdered food product having the contents stored in the can container may be milk powder.

[0017]

In the can lid of the present invention, the synthetic resin films that are in contact with each other by forming the folded-back portion by winding the entire peripheral edge of the opening of the lid frame body and folding it back are formed. Since it is formed by heating and bonding and enclosing the entire peripheral edge of the panel portion facing the opening inside the folded portion, it is possible to reliably prevent contact between the entire peripheral edge and the contents and to prevent rust. In addition, the synthetic resin scraping member is provided in the opening of the metal lid frame by locking the locking part of the scraping member to the folded-back portion in a disengageable manner. It is provided and can be easily removed after use to facilitate separation by material at the time of recycling.

Further, the material for coating the surface of the aluminum foil of the ceiling sealing material, the material for the film forming the coating on the upper and lower surfaces of the lid frame, and the material for the scraping member are specified by the standards of the Minister's Ordinance, etc. By using a polyethylene resin or polyethylene terephthalate resin that is compatible with the above, it is suitable for powdered foods, especially powdered milk.

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

Further, when the lid frame is made of a metal other than tinplate, for example, aluminum or tin-free steel, a powder of polyethylene resin film or polyethylene terephthalate resin film is applied to the upper and lower surfaces thereof. Suitable for canned foods containing body foods, especially milk powder. At this time, even if a coating film of a polyethylene resin film or a polyethylene terephthalate resin film is applied to the lid frame body with an adhesive, the surface of the metal forming the lid frame body is not exposed by the coating film,
Further, the adhesive or the metal of the peripheral edge of the panel portion facing the opening is enclosed in the folded portion, whereby contact between the metal forming the lid frame and the powder food in the can container is surely prevented. .

Further, by providing a peeling opening tab on the outer peripheral edge portion of the top surface sealing material, the tab can be easily pinched when the top surface sealing material is peeled off to facilitate the peeling work.

[0022]

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

FIG. 1 is a plan view showing a can lid of an embodiment of the present invention, FIG. 2 is an explanatory view showing a part of the can lid of FIG. 1 by breaking it, and FIG. 3 (a) is a main part of FIG. FIG. 3 is an enlarged view of FIG.
FIG. 4B is an explanatory diagram showing another example of FIG. 3A, and FIG.
Is an explanatory view showing a locking portion of a rod-shaped scraping member, FIG.
Is an explanatory view showing a locking portion of another rod-shaped scraping 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 action of FIG. 5, and FIG. 2 is an explanatory view showing another example of FIG. 2, FIG. 8 is an explanatory view showing a partially broken can lid of another example, and FIG. 9A is an explanatory view showing an enlarged main part of FIG. 9B is an explanatory diagram showing another example of FIG. 9A, FIGS. 10 and 11 are explanatory diagrams showing another example of FIG. 8, and FIG. 12 is an explanatory diagram showing another example of FIG. 13 is an explanatory view showing a part of the can lid of FIG. 12 in a cutaway manner.

The can lid 1 is attached to the can container X, and as shown in FIG. 1, a tin lid frame 2 and a ceiling provided on the lid frame 2 so as to be detachable. And the face seal material 3.

As shown in FIG. 2, the lid frame body 2 has a curl portion 4 for tightening the can container X, a panel portion 5 extending inward from the curl portion 4, and the panel portion 5. And a circular opening 6 formed on the outer surface of the opening 6. Further, a folded-back portion 7 is formed on the peripheral edge of the opening 6. Further, the lid frame body 2 extending from the outer peripheral edge of the curl portion 4 to the inner peripheral edge of the opening 6
As shown in FIG. 3A, the coating 8 is applied to the entire upper surface. The coating 8 is formed by adhering a polyethylene resin film to the surface of the lid frame 2. At this time, the film may be adhered to the surface of the lid frame body 2 made of tin by heating or by 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, because the adhesiveness between the tin plate and the tin plate is relatively low.
Strong adhesion can be achieved by using a phenolic resin or epoxy-urea resin. Therefore, the peeling of the coating film 8 from the lid frame body 2 can be surely prevented even in each step such as pressing, curling, winding and the like when manufacturing the can lid. As will be described later, FIG.
As shown in (b), the coating film 8 may be applied not only to the upper surface side of the lid frame 2 but also to both the upper surface side and the lower surface side.

Further, as shown in FIG. 2, the entire peripheral edge of the ceiling sealing material 3 is adhered to the upper part of the peripheral edge of the opening 6 by heating, whereby the opening 6 is closed. ing. The top sealing material 3 is formed of an aluminum foil whose upper surface side and lower surface side are covered with a polyethylene resin film, and as shown in FIG. 1, a closing portion 9 which covers and closes the opening portion 6, It is constituted by a tab 10 extending outward from a part of the peripheral edge of the closing portion 9. The tab 10 is provided by folding back from the boundary of the closed portion 9 to the upper surface side of the closed portion 9. As a result, the size of the tab 10 can be formed to be relatively large, and the tab 10 can be easily gripped during the unsealing work without hindering the work such as winding.

The folded portion 7 of the opening 6 is shown in FIG.
As shown in FIG. 5, the peripheral edge 5 of the panel portion 5 facing the opening 6
It is formed by winding a at the bottom and folding it back. At this time, in the folded-back portion 7, as shown in FIG. 3A, a folded-back portion overlaps with a portion of the lower surface of the panel portion 5. And
Since the entire surface of the upper surface side of the lid frame body 2 from the outer peripheral edge of the curl portion 4 to the peripheral edge 5a of the panel portion 5 is coated with a polyethylene resin film, the polymerized portion is covered with the above coating. 8 is interposed. The peripheral edge 5a of the panel portion 5 is enclosed in the folded-back portion 7 by heating and adhering the above-mentioned polymerized portions via the coating film 8 to each other. As a result, the peripheral edge 5a of the panel portion 5 is not exposed, and therefore, not only can rust and the like be reliably prevented from occurring, but also the adhesive that is exposed from the tip of the peripheral edge 5a of the panel portion 5 Since the contact with the powdered milk which is the content is reliably prevented, it can be adapted to the can of milk powder. Furthermore, since the polyethylene resin film which is the coating 8 on the upper surface of the lid frame 2 and the polyethylene resin film which is coated on the surface of the top sealing material 3 are easily adhered to each other, the opening 6 is covered by the top sealing material 3. It is possible to reliably and firmly close the block.

As shown in FIG. 3 (b), even when the coating film 8 is applied to both the upper surface side and the lower surface side of the lid frame body 2, a part of the folded-back portion 7 is folded back. When part of the lower surface of the portion 5 is polymerized, 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 adhered to each other by heating. Edge 5
It is possible to reliably contain a in the inside of the folded portion 7. Moreover, in this case, since the entire portion of the lid frame body 2 is covered with the coating film 8, the material of the lid frame body 2 is not limited as long as the coating film 8 is formed of a polyethylene resin film. Even if the lid frame body 2 is formed using free steel or the like, it can be sufficiently adapted to the can container.

Further, as shown in FIGS. 1 and 2, the opening 6 has a rod-shaped scraping member 11 which traverses inward thereof.
Is provided. The rod-shaped scraping member 11 is made of polyethylene resin, and has, as shown in FIG. 4 (a), locking portions 12 having U-shaped cross-sections for locking the folded-back portion 7 at both ends thereof. The locking portion 12 is provided with a claw portion 13 which is detachably engaged with a valley portion 7a formed at the boundary between the folded-back portion 7 and the lower surface of the panel portion 5 along the upper edge of the locking portion 12. This prevents the can container X from dropping into the inside. Further, the rod-shaped scraping member 11
For example, since a measuring spoon (not shown) is brought into contact with the lower portion of the can container X when it is scrubbed, it can be easily removed by pressing from above when the can container X is discarded without dropping into the can container X. You can Therefore, when the can lid 1 is recycled, the lid frame body 2 made of metal and the rod-shaped scraping member 11 made of synthetic resin can be easily separated.

Further, in the rod-shaped scraping member 11, even if the claw portion 13 is not provided in the engaging portion 12, the rod-shaped scraping member 11 shown in FIG.
As shown in (b), the pair of side wall upper ends facing each other of the locking portion 12 are formed by inclining one side wall 12a in a direction toward each other so that the upper ends of the side walls 12a of the locking portion 12 are separated from each other. The locking portion 12 may be elastically engaged with the folded-back portion 7 by utilizing the elastic restoring force generated when the locking portion 12 is caused to move.

Furthermore, as shown in FIGS. 12 and 13,
Instead of the rod-shaped scraping member 11, a plate-shaped scraping member 11a that covers a part of the opening 6 may be used. The plate-shaped cutting member 11a has a locking portion 12 having a U-shaped cross section similar to that of the rod-shaped cutting member 11 shown in FIGS. 4 (a) and 4 (b) which is locked to the folded-back portion 7 as shown in FIG. Perimeter edge 5
A plurality is provided on the side along a. Then, the plate-shaped cutting member 11a uses one edge thereof as a cutting portion.
Such a plate-shaped scraping member 11a also helps prevent foreign matter from falling during scraping.

Further, as shown in FIG. 5, it is preferable that the panel portion 5 of the lid frame body 2 is provided with an annular convex portion 14 projecting upward along the opening 6. Then, by heating and pressing the top sealing material 3 on the top of the convex portion 14, it is possible to regulate the heat dispersion during heating by the convex portion 14, and further, the top sealing material 3 and the panel. Since the bonding range with the portion 5 is limited to the top of the convex portion 14, the ceiling sealing material 3 is reliably bonded onto the panel portion 5 and the ceiling sealing material 3 from the panel portion 5 is adhered. Peeling can be easily performed.

Further, as shown in FIG. 6A, the cut portion 1 is formed in the coating film 8 along both side edges of the top portion of the convex portion 14.
It is preferable to form 5,16. That is, by adhering the ceiling sealing material 3 to the coating 8c between the cut portions 15 and 16, the panel portion 5 is opened when the closed portion 9 is opened.
When the top surface sealing material 3 is peeled off from the top surface sealing material 3, as shown in FIG. 6B, the coating 8c between the cut portions 15 and 16 is adhered to the back surface of the top surface sealing material 3 to form the convex portion. Even if the top surface sealing material 3 is peeled off from the top portion 14 and is firmly adhered to the top portion of the convex portion 14, the top surface sealing material 3 can be easily peeled off, and the top surface sealing material 3 The appearance of the peeled marks on the panel portion 5 after peeling is also good.

Further, as shown in FIG. 7, the folded portion 7
May be projected upward from the panel portion 5 to form the convex portion 14.

Further, also in the convex portion 14 shown in FIG. 7, the rod-shaped scraping member 11 shown in FIG. 4 (b) is provided so as to be engaged with the folded-back portion 7, and the cut portions 15 and 16 shown in FIG. 6 (a) are provided. It is preferably formed.

Further, as shown in FIG. 8, the folded portion 7
May be formed by winding the peripheral edge 5a of the panel portion 5 upward and folding it back. Also by this, when the coating film 8 is applied only to the upper surface side of the lid frame body 2, the folded-back portion 7 has the shape shown in FIG.
As shown in (a), the folded back part overlaps with a part of the upper surface of the panel part 5. And the said coating film 8 is interposed in the said superposition | polymerization part. The peripheral edge 5a of the panel portion 5 can be enclosed inside the folded-back portion 7 by heating the above-mentioned polymerized portions through the coating 8 and adhering them to each other, and further, the coating on the upper surface of the lid frame body 2 The polyethylene resin film No. 8 and the polyethylene resin film coated on the surface of the ceiling sealing material 3 can be easily adhered. In this case, the bar-shaped cutting member 11 shown in FIG.

Further, as shown in FIG. 9B, when the coating film 8 is applied to both the upper surface side and the lower surface side of the lid frame body 2, the folded-back portion of the folded-back portion 7 is partially removed. When superposed on a part of the upper surface of the panel portion 5, the coating 8 on the upper surface of the panel portion 5
b and the coating 8a at the folded back portion come into contact with each other and can be easily adhered to each other by heating, and the peripheral edge 5a of the panel portion 5 can be surely enclosed in the folded back portion 7.

Further, as shown in FIG. 10, the opening 6
By providing an annular convex portion 14 protruding upward along with, and by bonding the top surface sealing material 3 to the top portion of the convex portion 14 by heating and pressurizing it, like the convex portion 14 shown in FIG. Dispersion of heat at the time of heating can be regulated by the convex portion 14, and further, since the bonding range between the ceiling sealing material 3 and the panel portion 5 is limited to the top of the convex portion 14, the ceiling surface Seal material 3
Is surely adhered to the panel portion 5, and the top sealing material 3 can be easily peeled from the panel portion 5.

Further, as shown in FIG. 11, the convex portion 14 may be formed by projecting the folded-back portion 7 above the panel portion 5. However, in this case, it is essential to apply the polyethylene resin film coating 8 to at least the lower surface of the lid frame 2. Since the upper surface of the folded-back portion 7 shown in FIG. 11 is a portion located on the lower surface side of the lid frame body 2, there is no coating film 8 on the top of the convex portion 14, and the coating film 8 is provided only on the upper surface of the lid frame body 2. If it does, the top surface sealant 3 and the convex portion 1
This is because the adhesiveness with 4 becomes low. Therefore, the lid frame body 2
If the folded portion 7 is formed so as to project above the panel portion 5 by applying the coating 8 of the polyethylene resin film on the lower surface of the above, the adhesiveness between the ceiling sealing material 3 and the convex portion 14 becomes sufficiently strong. As a result, reliable sealing of the opening 6 by the top sealing material 3 can be obtained. Further, needless to say, the cut portions 15 and 16 shown in FIG. 6A may be formed in the convex portion 14 as well.

In the above embodiment, the material for covering the surface of the ceiling sealing material 3, the material for the coatings 8 on the upper and lower surfaces of the lid frame 2, and the rod-shaped cutting member 11 are used.
Alternatively, the material for the plate-shaped scraping member 11a and the like is a polyethylene resin that conforms to the standard of the Ministerial Ordinance for Milk and the like, but by using polyethylene terephthalate resin as the material, it is possible to adapt it to a can container for powdered milk. Needless to say, when the contents are other than dairy products such as milk powder, the materials for the above respective parts are not limited.

[0041]

As is apparent from the above, according to the present invention, the synthetic resin coated on the surface of the lid frame body by the folded portion is wrapped around the entire peripheral edge of the panel portion and folded back. Since the film-made film is heat-bonded and the entire peripheral edge is enclosed inside the folded-back portion, the contact of the contents to the entire peripheral edge is surely prevented, and the occurrence of rust etc. is surely prevented. be able to. Further, by providing the folded-back portion, the scraping member is locked to the folded-back portion so that the locking portion thereof can be engaged and disengaged, and the synthetic resin scraping member is provided in the opening of the metal lid frame. In addition, it can be easily removed after use and can be easily separated by material when recycled.

The material for coating the surface of the aluminum foil of the ceiling sealing material, the material for the film forming the coating on the upper and lower surfaces of the lid frame, and the material for the scraping member are the standards of the Ministerial Ordinance, etc. By using a polyethylene resin or a polyethylene terephthalate resin compatible with, it is possible to adapt to milk powder. Further, when the lid frame is made into a tin plate, even if a polyethylene resin film or a polyethylene terephthalate resin film is adhered to the upper surface of the lid frame through an adhesive to form a film, the adhesive may be exposed. Since the contact between the adhesive and the powdered milk inside the can container is surely prevented by enclosing the entire peripheral edge in the folded portion, it is suitable for a can container containing powdered milk and has a tin lid frame. The body can be firmly coated with a polyethylene resin film or a polyethylene terephthalate resin film. Thereby, the ceiling sealing material formed by coating the surface of the aluminum foil with the polyethylene resin film or the polyethylene terephthalate resin film can be reliably adhered by heating through the coating of the panel portion to obtain high sealing performance. .

When the lid frame is made of a metal other than tin, for example, aluminum or tin-free steel, powdered milk is obtained by applying a polyethylene resin film or polyethylene terephthalate resin film coating on the upper and lower surfaces thereof. Can be adapted to a can container having the contents. At this time, even if a coating film of a polyethylene resin film or a polyethylene terephthalate resin film is provided on the lid frame body via an adhesive, the surface of the metal forming the lid frame body is not exposed by the coating film,
Furthermore, the adhesive or the metal on the peripheral edge of the panel portion is sealed in the folded portion, so that contact between the metal forming the lid frame and the powdered milk inside the can container can be reliably prevented.

Therefore, according to the present invention, it is possible to surely prevent rust and the like from being generated at the peripheral edge of the panel portion of the lid frame body, and to recycle it. In particular, it is possible to provide a can lid suitable for a can of milk powder.

[Brief description of 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. 1 by breaking it.

3 (a) is an explanatory view showing an enlarged main part of FIG.
(B) is explanatory drawing which shows the other example of (a).

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

5 is an explanatory diagram showing another example of FIG. 2. FIG.

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

FIG. 7 is an explanatory diagram showing another example of FIG. 2.

FIG. 8 is an explanatory view showing a partially broken can lid of another example.

9 (a) is an explanatory view showing an enlarged main part of FIG.
(B) is explanatory drawing which shows the other example of (a).

10 is an explanatory diagram showing another example of FIG. 8. FIG.

FIG. 11 is an explanatory diagram showing another example of FIG. 8.

12 is an explanatory diagram showing another example of FIG. 1. FIG.

FIG. 13 is an explanatory view showing a part of the can lid of FIG. 12 in a cutaway manner.

14A is an explanatory plan view showing a conventional can lid, FIG.
(B) is explanatory drawing which fractures | ruptures and shows the principal part of (a).

[Explanation of symbols]

X ... Can container, 1 ... Can lid, 2 ... Lid frame body, 3 ... Top sealing material, 4 ... Curl portion, 5 ... Panel portion, 6 ... Opening portion, 7 ... Folding portion, 8 ... Coating, 10 ... Tab , 11 ... bar-shaped cutting member, 11a ... plate-shaped cutting member, 12 ... locking portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Nagai 839-1, Kamuro, Iwatsuki-shi, Saitama Prefecture Kitami Seikan Co., Ltd. Within

Claims (4)

[Claims] 1. A curl portion for winding a can container around 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 an upper surface of the panel portion. Is covered and adhered, the entire peripheral edge of the panel portion facing the opening is rolled up and folded back, and a folded portion in which the entire peripheral edge is enclosed is formed, and the synthetic resin film is heat-bonded. And a metal lid frame body whose entire peripheral edge is sealed, and a metal foil covered with a synthetic resin film that is releasably adhered to the panel portion of the lid frame body to seal the opening. A can lid made of a ceiling sealing material, characterized in that a synthetic resin scraping member having a locking portion that is releasably locked to the folded-back portion is provided so as to span the opening. Can lid. 2. When the contents stored in the can container are powdered foods, the ceiling sealing material is formed by coating the surface of the aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and the lid frame body is The lower surface of the container facing the interior of the can is formed by tinplate, and the upper surface thereof 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, which is characterized in that. 3. When the contents to be stored in the can container are powdered foods, the ceiling sealing material is formed by coating the surface of the aluminum foil with a polyethylene resin film or a polyethylene terephthalate resin film, and the lid frame body is The can lid according to claim 1, wherein a coating film made of a polyethylene resin film or a polyethylene terephthalate resin film is provided on both upper and lower surfaces thereof, and the scraping member is made of a polyethylene resin or a polyethylene terephthalate resin. 4. The can lid according to claim 2 or 3, wherein the powdered food having the contents stored in the can container is powdered milk.