JP2008100694A - Manufacturing method of lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for continuously manufacturing a lid keeping only a part required to be heat-sealed coated with a heat seal agent. <P>SOLUTION: The lid manufacturing method comprises steps of continuously feeding a base film 7, printing on the front side, forming a register mark, positioning by detecting the register mark by a detector 5, and coating a heat seal agent only on a part overlapping the opening edge of a container on the back side of the printing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a lid material that heat-seals an opening edge of a container, for example, a container for food such as jelly or yogurt.

  As a conventional method for producing a heat-sealable lid member, a method of producing a cover material by applying a heat sealant such as a heat seal lacquer to the entire back side of a base film made of aluminum foil or the like (see Patent Document 1 below) There is a method in which a heat sealant is applied only to a portion that requires heat sealing on the back side of the substrate film (see Patent Document 2 below).

JP 2002-225175 A JP 2005-41539 A

Since the cover material described in Patent Document 1 has a heat sealant applied to the entire back surface of the base film, if the heat seal is applied to the opening edge of the container using this cover material, depending on the contents, a perfume component And the like adsorbed to the heat sealing agent, and the scent and taste of the contents sometimes changed. In order to prevent this, if a heat sealing agent with little adsorption is used, there is a problem that the adhesive force is weak and good adhesion cannot be obtained.
Moreover, since the lid | cover material of patent document 2 has apply | coated the heat-seal agent only to the part which needs a heat seal, the fragrance | flavor component of the content will not adsorb | suck. However, such a lid material is manufactured in a single sheet and cannot be manufactured on the line.

  Accordingly, an object of the present invention is to provide a method for continuously producing a lid material in which a heat sealing agent is applied only to a portion requiring heat sealing in order to solve the above-described problems.

The method for producing a lid material of the present invention is a method for producing a lid material heat-sealed to the opening edge of a container, continuously feeding a base film, printing on the surface side and providing a register mark, The register mark is positioned by detecting it with a detector, and a heat sealing agent is applied only to a portion overlapping the opening edge of the container on the back side of the printing.
By doing in this way, the cover material which apply | coated the heat-seal agent only to the location which overlaps with the opening edge part of a container can be manufactured in-line. Since the lid material manufactured in this way is applied with the heat sealant only at the location overlapping the opening edge, the amount of heat sealant used can be reduced, and the lid material can be heated to the opening edge of the container. When sealed, the flavor component of the contents is not adsorbed by the heat sealant.

Hereinafter, the production method of the present invention will be described with an example.
As an example of the manufacturing method of the present invention, there is one that can be carried out using an apparatus 1 as shown in FIG.
The apparatus 1 includes printing units 2 and 3, a heat sealant application unit 4, a detector 5, and the like as components, and continuously sends a base film 7 from a printing raw material 6 wound in a roll shape, Printing can be performed on the front side by the printing units 2 and 3, and the heat sealing agent can be applied to the back side by the heat sealing agent application unit 4.

The printing units 2 and 3 include ink tanks 2a and 3a for storing ink, plate cylinders 2b and 3b on which a plate is mounted, pressure cylinders 2c and 3c paired with the plate cylinder, and the like. It is stored in the ink tanks 2a and 3a, and one color of a pattern to be printed on the surface side of the base film 7 is applied by the plate cylinders 2b and 3b, and a register mark can be provided at the end of the base film 7. .
In this example, since the case of performing printing of two colors is shown, the number of printing units is two. However, the number of printing units can be further increased to perform multicolor printing.
As a printing method, a conventionally known method such as gravure printing or offset printing can be appropriately selected.

  The heat sealant application unit 4 includes a sealant tank 4a for storing a heat sealant, a plate cylinder 4b on which a plate is mounted, an impression cylinder 4c paired with the plate cylinder, and the like. A heat sealant can be applied to the back surface side of 7.

The detector 5 is connected to an information processing device (not shown), and can detect the position of the register mark by a difference in reflection of light, etc. The side printing and the back side heat sealant can be aligned.
In this example, the detector 5 is arranged to detect the register mark after the base film 7 passes between the plate cylinder 3b and the impression cylinder 3c of the printing unit 3.

  The base film 7 is a base material of the lid material to be manufactured, and is made of paper, aluminum foil, a plastic film, and the like. In this example, the base film 7 is continuously sent out from the printing original roll 6 wound in a roll shape. It is like that.

The lid | cover material can be manufactured as follows using the said apparatus 1. FIG.
The base film 7 is continuously fed from the printing raw fabric 6 in the direction of the arrow in FIG. 1, and the first color is printed by the ink in the ink tank 2a between the plate cylinder 2b and the impression cylinder 2c of the printing unit 2 on the surface side. Is given. Simultaneously with this printing, a substantially rectangular register mark for the first color is also given to the end of the base film 7.

  Next, the base film 7 is printed on the surface side between the plate cylinder 3b and the impression cylinder 3c of the printing unit 3 with the ink of the ink tank 3a for the second color. Simultaneously with this printing, a substantially rectangular register mark for the second color is also provided on the edge of the base film 7, and this register mark is printed at an appropriate interval from the first color register mark.

  These register marks are detected by the detector 5 after passing through the printing unit 3, and if the interval between the two register marks is not as set, the color positions are shifted. When the color position is deviated, the tension of the base film 7 can be adjusted by a compensator roll (not shown) or the like to adjust the color position.

After that, the base film 7 flows on the roller so that the back side is the lower side, and the heat sealant of the sealant tank 4a on the back side between the plate cylinder 4b and the impression cylinder 4c of the heat sealant application unit 4. Is applied.
The position where the heat sealant is applied can be adjusted to the printing position on the front side by controlling the feed speed of the base film 7 with the position of the second color detected by the detector 5 as a reference.

  The base film 7 that has been subjected to printing and application of the heat sealant can be cut into a suitable shape and used as a lid.

  In the above, as the alignment of both the front and back surfaces, the position of applying the heat sealant on the back surface side is adjusted based on the register mark of the second color on the front surface side. A register mark is provided, and the heat sealant itself is colorless, but since the light reflection is different after the heat sealant is dried, the difference is used to register the heat sealant with the detectors provided on the front and back sides. Marks can be detected and controlled for alignment.

It is the figure which showed typically the manufacturing apparatus which can implement an example of the manufacturing method of this invention.

Explanation of symbols

1 device 2, 3 printing unit 2a, 3a ink tank 2b, 3b plate cylinder 2c, 3c impression cylinder 4 heat sealant application unit 4a sealant tank 4b plate cylinder 4c impression cylinder 5 detector 6 printing stock
7 base film

Claims (1)

A method of manufacturing a lid material that heat-seals an opening edge of a container,
The base film is continuously sent out, printing is performed on the front surface side, and a register mark is provided. The register mark is detected by a detector to align the heat sealant on the back side of the printing. A method for manufacturing a lid member, comprising a step of applying only to a portion overlapping an opening edge.

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