JPH0667306U - Film heat sealing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a heating roller that does not cause wrinkles after the film is sealed, prevent the appearance of the finished product from deteriorating, and further change the transfer speed of the film to cause jamming. [Structure] Consists of pressure rollers and heating rollers that are arranged opposite to each other on the film transport surface and that heat-seal both sides of both films while transporting two superposed films. In the heat sealing device, the film contact portion on the outer peripheral surface of the heating roller is formed in two lines.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat seal device for heat-sealing and sealing two films conveyed in a superposed state, and more particularly to a shape of a heating roller for welding the films.

[0002]

[Prior art]

 In order to keep the confidentiality of the recording paper ejected from image forming devices such as facsimile receivers, copiers and printers, it is necessary to keep the information confidential until it reaches the intended recipient. An automatic sealing machine has been proposed which covers both sides of the film by heat-sealing and seals the recording paper by welding and cutting the film before and after the recording paper.

In this case, in order to heat seal both sides of the film, as shown in FIG. 1, a pressure roller 1 and a heating roller which are arranged opposite to each other with the transport surfaces of the films 3 and 4 interposed therebetween. By welding the sealing areas 5 and 6 on both sides of the films 3 and 4 by means of 2, the films 3 and 4 are sealed.

[0004]

[Problems to be solved by the device]

 In such a heat seal device including a pressure roller and a heating roller, generally, as shown in FIG. 1, the pressure roller 1 and the heating roller 2 have a large film contact surface width of about 5 mm. Things were being used. However, due to the large contact area between each roller and the films 3 and 4, and the high heating temperature for sealing the films 3 and 4 (160 ° C when the films 3 and 4 are PP films). As the films 3 and 4 passed between the rollers, the films 3 and 4 contracted, so that wrinkles 7 were observed in the seal area.

Therefore, there are problems that the appearance of the finished product is deteriorated and that the transfer speed of the films 3 and 4 changes to cause a jam.

In view of the above, the present invention provides a heat seal device that does not cause wrinkles after sealing a film, and prevents the finished product from being deteriorated in appearance. The purpose is to prevent the occurrence of jam by changing the transfer speed of the film.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, pressure is applied to heat-seal both sides of two films while transporting two superposed films, which are arranged opposite to each other on the transporting side of the films. In a heat seal device including a roller and a heating roller, a film contact portion on the outer peripheral surface of the heating roller is formed in two lines.

Further, in order to achieve the above object, in the present invention, the width of the two film contact portions of the outer peripheral surface of the heating roller is set to 2 mm or less, and the width of the non-contact portion therebetween is set to 0.5 mm or more. It is characterized by that.

[0009]

[Action]

 In the present invention, since the film contact portion of the heating roller is formed in two lines, the contact area between the heating roller and the film can be reduced without decreasing the adhesive strength of the two films, and the contact area can be reduced. When it is small, the amount of heat shrinkage is small, and it is possible to prevent wrinkles from occurring after the film is sealed.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings of FIGS. FIG. 2 is a front view of a heat sealing device according to an embodiment of the present invention. As shown in FIG. 2, the pressure rollers 10 and 11 and the heating rollers 12 and 13 are arranged opposite to each other with the transport surface of the films 17 and 18 interposed therebetween, and the heating rollers 12 and 13 are in film contact. The part is formed in two lines. Auxiliary rollers 14 and 15 for supplementing the strength of the heating rollers 12 and 13 are attached to the heating rollers 12 and 13, respectively. The support shafts 19 of the heating rollers 12 and 13 and the auxiliary rollers 14 and 15 are hollowed out, and a heater 16 is inserted in the hollowed out portion to heat the heating rollers 12 and 13 to a predetermined temperature. It is like this.

When the films 17 and 18 are conveyed between the pressure rollers 10 and 11 and the heating rollers 12 and 13, both sides of the films 17 and 18 are welded and the films 17 and 18 are sealed. . At this time, since the film contact portions of the heating rollers 12 and 13 are formed in two lines, the contact area between the heating roller and the film can be reduced without reducing the adhesive strength of the films 17 and 18. . When the contact area is small, the amount of heat shrinkage is small, so that it is possible to prevent wrinkles from being generated on both sides of the film after sealing the film.

Further, in the film contact portions of the heating rollers 12 and 13 formed in two lines, the widths W1 and W3 of the contact portions with the film are 2 mm or less, and the width W2 of the non-contact portions is 0.5 mm or more. Desirably, this makes it possible to effectively prevent wrinkles from occurring after the films 17 and 18 are sealed.

Actually, the widths W1 and W3 of the contact portion with the film are set to 1 mm, the width W2 of the non-contact portion is set to 1 mm, and the heating rollers 12 and 13 are set to a temperature of 160 ° C. When the PP film was sealed, wrinkles did not occur, and a seal with good appearance was possible.

FIG. 3 is a top view showing a sealed state of the film when the film is sealed by the heat sealing device according to the embodiment of the present invention. Both sides of the film 20 have sealing regions 23, 24 having a width W1, non-sealing regions 22, 25 having a width W2, and sealing regions 21, 26 having a width W3. It has become possible to create a sealed product that does not wrinkle and has a good appearance.

[0015]

[Effect of device]

 As described above, according to the present invention, since wrinkles do not occur after the film is sealed, the appearance of the finished product is prevented from being deteriorated, and further, the transfer speed of the film is changed to cause the occurrence of jam. It can be prevented from happening.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state when a film is sealed by a conventional heat sealing device.

FIG. 2 is a front view of a sealing device according to an embodiment of the present invention.

FIG. 3 shows a heat sealing device according to an embodiment of the present invention.
It is a top view which shows the sealing state of the film at the time of sealing a film.

[Explanation of symbols]

 1, 2, 12, 13 Heating roller 3,4 Film 5,6 Sealing area 7 Wrinkle 10,11 Pressure roller 14,15 Reinforcing roller 16 Heater 17,18,20 Film 21,23,24,26 Sealing area 22, 25 Non-sealed area

Claims (2)

[Scope of utility model registration request] 1. A heat seal comprising a pressure roller and a heating roller, which are arranged to face each other on opposite sides of a film transport surface and heat seal both sides of both films while transporting two superposed films. In the apparatus, the heat-sealing device is characterized in that the film contact portion on the outer peripheral surface of the heating roller is formed in two lines. 2. The width of the two film contact portions on the outer peripheral surface of the heating roller is 2 mm or less, and the width of the non-contact portion therebetween is 0.
The heat seal device according to claim 1, wherein the heat seal device has a length of 5 mm or more.