JPH1036U - Structure of can lid for can - Google Patents

Abstract

(57) [Summary] [Purpose] The development of a can lid that can be opened for cans for food and the like without using tools such as can openers. In the can lid of the present invention, a plastic film or sheet is inserted, and a top plate main portion 4 and an outer peripheral edge portion 5 are plastic-molded, leaving a narrow groove-shaped non-covered portion 3 on the peripheral edge thereof. A pulling handle (pull top) 7 is formed in the main part. When the handle 7 is pulled up, the handle tip 6 breaks the film when the handle 7 is pulled up. When the handle is further pulled up, the tear advances along the non-coated portion 3 and the can is opened.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention relates to the structure of a can lid for cans such as foods and beverages.

[0002]

[Prior art]

 Recent containers used for canning are metal cans (tin, tin-free steel, aluminum), composites (canned paperboard, metal upside down), retort pouches (plastic flexible containers, plastic molded containers, aluminum molded containers). ), Glass containers, etc. are very diversified. However, except for some aluminum cans and beverage cans, special tools such as can openers must be used to open the cans. is there. Moreover, the cut surface of the can that has been cut open by a can opener or the like forms a sharp knife edge and is in a dangerous state.

[0003] Further, in some plastic containers, a thin groove is formed around the periphery of the top plate to form a thin portion, and a pulling tongue attached thereto is pulled to open the can to tear the thin portion. There is.

[0004]

[Problems to be solved by the invention]

 The reason that tin cans and other steel cans are used for food is that tin (equivalent to 250 ppm or less, which is safe for food hygiene) from the plating applied to the inner surface of the can keeps the food in a reduced state, This is because it is effective in retaining flavor. Steel cans are often used because of these advantages, but the biggest disadvantage is that, as mentioned above, a special tool called “can opener” is required to open the cans, and the cut end is small. It forms a dangerous knife edge, which poses a risk of injury to fingers.

[0005] Furthermore, it is very convenient to form a top plate from plastic and make the periphery of the top plate a thin portion and open it with a tongue for pulling, since a tool called "can opener" is not required. However, the absence of pinholes in plastic thin-walled moldings is an absolute requirement for maintaining the quality of canned contents. In order to be able to open the can with only the force of fingers in a plastic can lid, the cleaved part must be very thin. Pinholes may occur in this thin part, but it is very difficult to control them. The present invention solves these problems and has developed a can lid that can be opened simply by pulling it up by hand without the need for tools such as can openers.

[0006]

[Means for Solving the Problems]

 In the present invention, a can top plate is made of plastic, and a thin-walled portion is provided around the periphery of the top plate where a plastic film or sheet having no permeability to gas, water vapor or the like is inserted, and a pull top (handle) for pulling up the top plate. By pulling up the pull-top, the inserted film (including the sheet. The same applies hereinafter) is torn, and the top plate can be removed.

[0007]

【Example】

 The details of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which a canned top plate according to the present invention is mounted on a can. The top plate 1 has a ring shape (illustrated) near its outer diameter as shown in a plan view in FIG. Alternatively, it is a plastic plate obtained by insert-molding a thin plastic film 2 having a disc shape (not shown). The top plate 1 has a ring-shaped groove 3 that is not covered on the inserted plastic film 2 as a boundary. It is molded in a separated state. An annular pull-top 7 is formed on the top plate main portion 4 by being connected to a base portion 6 which is provided in contact with the ring-shaped groove portion 3 and protrudes therefrom. Both side surfaces of the base 6 are thin portions 6a, 6a in which the plastic film 2 of the insert is hardly covered with resin, and the annular pull-top 7 is not joined to the surface of the inner side ceiling plate 4. Is formed.

In order to improve the adhesion between the plastic film 2 and the plastic for molding the top plate, a number of small holes 2a are provided in the portion where the film is covered with the molded plastic, but the small holes are not necessarily small holes. There is no necessity, and the surface of the insert film may be roughened, or an uneven pattern may be formed. The main part 4 on the inner diameter side of the top plate 1 may be formed in a ring shape 4a instead of a disk shape so that the inside of the container can be seen through.

The can top plate 1 of the present invention having the above-described structure is attached to the can body as shown in FIG. 1 after the contents are packed in a can container. When the canister is pulled up strongly with the annular pull-top portion 7, the base portion 6 is inclined to the inside of the can with the point adjacent to the base portion 6 and the annular pull-top portion 7 as a fulcrum 6 b, and the plastic film 2 is torn at its tip. When the pull-top portion 7 is further pulled up, the inner-side top plate portion 4 is lifted in an inclined manner, and the tear on the film advances along the ring-shaped groove portion 3, and finally, the inner-side top plate main portion 4 becomes the outer-side peripheral portion. 5 and completely opened. In this case, it is desirable to form a slightly narrower portion at the fulcrum 6b than at the base 6 so that the base 6 can be smoothly inclined as the pull-up 7 is raised.

[0010]

[Effect of the invention]

 It is an absolute requirement that the performance of a can for canning is not permeable to microorganisms. Therefore, even a fine pinhole in the thin part (film) of the top plate of the present invention would be an obstacle to maintaining the quality of the contents, and its quality control is very important. It is easy to integrally mold the ring-shaped thin groove 6 of the present invention with the plastic at the same time as the top plate, but it is very difficult to perform pinhole inspection on all the molded products, and to secure safety. Therefore, if the thickness of the groove 6 is increased, it becomes difficult to open the can. The thin groove of the top plate in the present invention uses a film manufactured by inflation processing of plastic, etc., and it is possible to select one that has strict quality control easily and sufficiently performed during film processing. In addition, the plastic material used as the raw material can be selected from those that have good gas barrier properties and those that have the effect of blocking ultraviolet rays. Also, by using a transparent plastic or by making the top plate main portion 4 into a ring shape 4a, the contents of the can can be seen from the outside, so that a can having an effect of stimulating the purchase will be manufactured.

If the can body is made of plastic and the top plate of the present invention is used, the weight can be reduced as compared with a conventional iron can.

[0012] The biggest problem with conventional canning is that it is difficult to use. This required a tool called a can opener to open the can, and the present invention solves this point.The top plate can be easily removed simply by pulling up the pull-top without any tools. It is characterized by the fact that it can be done, and its convenience as a portable food product has been improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a can with a top plate according to the present invention.

FIG. 2 is a plan view of a top plate.

FIG. 3 is a sectional view of a top plate.

FIG. 4 is a cross-sectional view of a top plate having a ring-shaped molded portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Film 2a Small hole 3 Groove part 4 Top plate main part 5 Peripheral part 6 Base 6a Thin part 6b Support point 7 Pull top C Can body

Claims (1)

[Utility model registration claims] 1. A can for cooking, wherein the lid is made of plastic, a thin portion is provided on the inner diameter side slightly from the outer peripheral edge, and a pulling ring piece is integrally formed on the inner diameter side. The structure of the can lid for cans, characterized in that the thin portion is formed by inserting a plastic sheet into a mold.