JPH031365Y2 - - Google Patents

Description

[Detailed description of the invention] 〓Field of industrial application〓 The present invention relates to a container sealing device, and more particularly to a device that uses a hot plate to thermally weld and seal a lid material to a flange portion of a container body. .

〓Summary of the invention〓 This invention consists of an endless sheet that is arranged between a hot plate and a lid material and prevents the lid material from adhering to the hot plate, and is made of a laminate of multiple sheets.
These multiple sheets are joined at different positions and with their ends abutted against each other, thereby ensuring a secure seal even when the sheets come into contact at the seam. It was designed so that it could be used.

<Prior Art> Simple disposable containers are widely used to supply various foods and beverages. After the container is filled with contents, a lid material is thermally welded to the flange portion of the container to seal the container. Sealing is performed by pressing the lid against the periphery of the container using a hot plate, and at this time there is a gap between the two to prevent the lid from adhering to the hot plate. A synthetic resin sheet such as a Teflon sheet is interposed.

〓Problems to be solved by the invention〓 The synthetic resin sheet interposed between the lid material and the hot plate is of a streamer type or an endless type. The windsock type sheet has the disadvantage that the Teflon wears out quickly. Therefore, an endless sheet 1 as shown in FIG. 4 is used. However, such a sheet 1 has a seam portion as shown in FIG. 5, and has the disadvantage that a step is formed at the seam. Therefore, if the joint portion hits, not only will the strength of the sealing surface be weakened, but it will also cause defects such as the formation of pinholes. This phenomenon is particularly noticeable when using an easy-peel material or a thick lid material. Therefore, when such an endless sheet 1 is used, there is a problem in that the reliability of the seal decreases, especially when it hits a seam.

The present invention was developed in view of these problems, and provides a sealing device that prevents the occurrence of level differences even at the joints of endless sheets, thereby increasing the reliability of the seal. The purpose is to provide

〓Means for solving the problem〓 The present invention uses a hot plate to thermally weld and seal the lid material to the flange portion of the container body, and also creates an endless composite between the hot plate and the lid material. In the apparatus in which a resin sheet is provided and the sheet prevents the lid material from adhering to the hot plate, the endless synthetic resin sheet is composed of a laminate of a plurality of sheets, and The sheets are joined at different positions and with their ends butted against each other.

〓Effect〓 Therefore, according to the present invention, the endless tape does not create a step at the joining position of each sheet, and sealing can be performed reliably even at the joint, increasing the reliability of the seal. .

〓Example〓 Fig. 3 shows a sealing device using an endless sheet according to an embodiment of the present invention. 12 are arranged. The container body 12 is filled with contents in advance, and the upper opening is covered with a lid member 13, the peripheral edge of which is heat welded to the flange 14 of the container body 12 for sealing. A hot plate 15 is used for such sealing.

An endless sheet 20 is placed between the hot plate 15 and the lid 13, and this sheet 20 prevents the lid 13 from adhering to the hot plate 15. The endless sheet 20 is shown in FIGS.
As shown in the figure, two Teflon sheets 21, 2
It is composed of two laminates. The respective Teflon sheets 21 and 22 are joined at mutually different joining positions 23 and 24 with both ends butted against each other. Therefore, according to such an endless sheet 20, the two Teflon sheets 2 constituting this endless sheet 20
Even at the bonding positions 1 and 22, there is no difference in level and the surface becomes flat.

Therefore, even if the joining positions 23 and 24 hit each other, the lid 13 is reliably sealed against the flange 14 of the container body 12, and defects such as pinholes are prevented from occurring. Alternatively, the lid material 13 may be an easy-peel material or a thick lid material 1.
Even if 3 is used, the reliability of the seal will not deteriorate. This makes it possible to stabilize the seal strength with easy peelability and shorten the sealing time.

〓Effects of the invention〓 As described above, the present invention consists of an endless synthetic resin sheet arranged between the lid material and the heating plate, which is made up of a laminate of multiple sheets, and each of these multiple sheets is They are joined at different positions and with their ends butted against each other. Therefore, according to this structure,
There is no difference in level at the joining position, making it possible to perform highly reliable sealing and to stabilize the sealing strength.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an endless tape for sealing according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the joint part, Fig. 3 is a longitudinal sectional view showing the overall structure of the sealing device, and Fig. 4 is a longitudinal sectional view showing the overall structure of the sealing device. The figure is an external perspective view of a conventional endless tape, and FIG. 5 is an enlarged longitudinal cross-sectional view of the joint. In addition, in the symbols used in the drawings, 12...container body, 13...lid material, 14...flange, 15...
...Hot plate, 20... Endless sheet, 21, 22
...Teflon sheet, 23, 24...joining position,
It is.

Claims (1)

[Scope of utility model registration request] A lid material is thermally welded and sealed to the flange portion of the container body using a hot plate, and an endless synthetic resin sheet is provided between the hot plate and the lid material,
In the apparatus in which the sheet prevents the lid material from adhering to the hot plate, the endless synthetic resin sheet is composed of a laminate of a plurality of sheets, and each of the plurality of sheets is A sealing device characterized in that the sealing devices are joined at different positions and with their ends butted against each other.