JP2007296764A - Manufacturing method of sheet with strip-like transparent window - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit the transparency of a region of the transparent film where the paper sheet is not laminated from deteriorating, in a manufacturing method which takes up a sheet with a strip-like transparent window made up of a plurality of paper sheets laminated on an unwound transparent film, in its width direction. <P>SOLUTION: Hold-down rolls 31 and 32 are arranged apart from and before/after an adhesive application roll 21. In addition, the back 201b of each paper sheet 201 to be unwound from a paper sheet unwinding roll 200, is held down by the hold-down rolls 31 and 32, and an adhesive 15 is applied to each back 201b. Further, the transparent film 101 unwound from a transparent film unwinding roll 100 and each of the paper sheets 201, are made to pass through the gap between pressure rolls 51 and 52 and thereby, bonded together to obtain the sheet 121 with a strip-like transparent window, which is, in turn, taken up by the take-up roll 130. As no adhesive is applied to the part of the transparent film 101 between the paper sheets 201, the transparency of the part does not deteriorate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a sheet material with a strip-like transparent window used for producing a packaging bag or a packaging sheet provided with a strip-like transparent window made of a transparent film.

  A packaging bag with a transparent window in the form of a transparent film is required for packaging because the products contained in the packaging bag can be seen from the transparent window, and other than the window is made of an opaque sheet such as a paper sheet. In recent years, it has been used for packaging various products including foodstuffs. For example, as shown in FIG. 6, a sheet material, which is a material used to manufacture a packaging bag provided with such a belt-like transparent window, is a transparent film (base material) 101 having a predetermined width W1. On the other hand, an opaque sheet (hereinafter, also simply referred to as a paper sheet) 201 having a predetermined width W2 is laminated and bonded to both end portions except for a portion that forms a transparent window, and a belt-like shape when unrolled A sheet material 121 with a transparent window is presented.

  Conventionally, such a sheet material with a strip-shaped transparent window has been manufactured as follows, as shown in FIG. That is, a transparent film 101 (for example, polyethylene film or polypropylene, etc.) having a predetermined width wound on a transparent film unwinding roll 100 on the left side of the figure, if necessary, an adhesive coating roll (process) 10 for anchor coating agent. Send through. On the other hand, a roll-wrapped paper sheet 201 having a predetermined width is sent out from the paper sheet unwinding roll 200 in FIG. However, as shown in FIG. 8, the paper sheet 201 is separated as two paper sheet unwinding rolls 200 on one shaft 200 a so that a predetermined interval K <b> 1 is placed on both sides of the transparent film 101. It is arranged and attached to the shaft 200a so as to be sent out at a distance K1 from each other.

  The transparent film 101 fed out in FIG. 7 is separated and removed by the dryer 41 with the solvent of the anchor coating agent, and is guided and fed by a guide roller or a feed roller as indicated by an arrow in the figure. The transparent film 101 is a pressure-bonding roll (pressing roll and cooling roll) 55 arranged so as to be pressed against each other so as to be pressure-bonded to the paper sheet 201 fed out from the paper sheet unwinding roll 200 with a gap K1. , 56 (see FIGS. 7 and 8). However, in the manufacturing apparatus shown in the figure, the width W1 of the transparent film 101 between the transparent film 101 and the paper sheet 201 from the extrusion die 60 immediately before passing between the crimping rolls 55 and 56. A melted resin for pressure bonding (for example, molten polyethylene resin) is extruded and supplied in the whole direction, and the resin is crimped between the pressure-bonding rolls 55 and 56 and simultaneously wound around the cooling roll 56. The resin in the press bonding is instantaneously cooled and solidified to be integrated. In this way, a sheet material with a strip-like transparent window formed by laminating and pressing an opaque paper sheet 201 on a portion near both side edges (hereinafter also referred to as both sides) of a transparent film 101 (hereinafter also simply referred to as film) (FIG. 6). This is wound up on the winding roll 130 by, for example, a length of several thousand meters. Note that the applicant of the present application knows the conventional method for manufacturing a sheet material with a strip-shaped transparent window as a known technique, but includes prior art information related to the invention to be patented in this application. There is nothing to know about.

  However, the sheet material for packaging with a strip-shaped transparent window manufactured as described above has a portion that can be seen through in the portion between the opaque paper sheets 201 on both sides (K1 portion in FIG. 6). However, in the process of pressing the paper sheet 201 to the film 101, the heat-melted resin is supplied to the whole of the transparent film 101 in the width W1 direction, and the paper sheet 201 is pressed. For this reason, as shown in FIG. 9, the sheet material for packaging with a belt-like transparent window is formed on the transparent film 101 portion (K1 portion between the paper sheets 201) where the paper sheet 201 is not pressure-bonded. However, the resin melted and supplied by cooling and solidifying is present as the film 50. Therefore, the portion of the transparent film 101 where the resin film (hereinafter referred to as resin film) 50 is formed is compared with the transparency of the transparent film 101 itself before the resin film 50 is formed. As a result, the transparency is relatively lowered. Thus, when a product as a package is contained and packaged in a packaging bag with a strip-shaped transparent window manufactured from such a sheet material, the product inside is viewed through the strip-shaped transparent window. There was a problem that the product was not clearly or clearly visible.

  For such a problem, it is conceivable to control the width of the pressure-bonding resin supplied from the extrusion die 60 to the width of the paper sheet 201. However, the sheet material for packaging with a strip-shaped transparent window having various widths can be considered. In the manufacturing process, there are problems that the structure of the extrusion die 60 is complicated and the manufacturing process is complicated, such as that a lot of time is required for work setup.

  As another method, an adhesive is applied to the back surface (one side) of two rows (two) of paper sheets that are sent apart to form a band-like transparent window, and one side of the transparent film that is unwound. It is conceivable that the pressure-bonding rolls are pressed against each other so as to adhere to each other. However, in order to manufacture a sheet material with a strip-shaped transparent window in this way, a manufacturing apparatus as shown in FIG. 10 is used. In this apparatus, a transparent film 101 having a predetermined width wound around a roller on the right side of the figure is sent out from the unwinding roll 100 as indicated by an arrow in the figure. At the same time, from the paper sheet unwinding roll 200 on the left side of the figure, two rows of paper sheets 201 that are spaced apart to form a band-like transparent window are sent out as indicated by arrows in FIG. As shown in Fig. 2, the two rows of paper sheets 201 are arranged so as to be pressed against the adhesive application roll 21 arranged so that one side is half-sunk in the tank 11 and rotated. The idea is that an adhesive is applied to the back surface (one side) 201b of the two rows of paper sheets 201 through the two pressing rolls (rubber rolls) 22. Then, the adhesive 15 is applied to the entire width direction of the back surface 201b on the bonding surface side of each of the two rows of the paper sheets 201, the solvent is separated and removed through the dryer 41, and then these and the transparent film 101 are connected to each other. The idea is to press the pressure-bonding rolls 51 and 52 that are pressed against each other. That is, according to this method, two rows of paper sheets 201 each coated with an adhesive on one side are bonded to each other on both sides of the transparent film 101, so that the 2 in the film 101 is Since the adhesive is not applied to the transparent band portion sandwiched between the paper sheets 201 in the row, it can be considered that the above problem is solved.

  However, when two rows of paper sheets 201 are passed between the adhesive application roll 21 and the pressing roll 22 shown in FIG. Not only is the adhesive applied to the back surface (single side) 201b of the paper sheet 201 in the row, but also the opposite surface 201a is attached to the opposite surface 201a for the following reasons, which cannot be realized. This is because when the adhesive is applied in this way, as shown in FIG. 11, the adhesive is applied to the surface of the adhesive application roll 21 between the two rows of paper sheets 201. The adhesive 15 being applied is applied (transferred) to the surface of the presser roll 22. Then, the adhesive adhering to the surface of the presser roll 22 wets and spreads to the part pressing the paper sheet 201 on the surface in the axial direction of the roll. As a result, in this method, the adhesive is also applied to the surface 201a of the paper sheet 201. On the other hand, in the manufacture of such a packaging sheet material with a band-shaped transparent window, after pressure bonding, the sheet is wound on a winding roll 130. If an adhesive is present on the surface 201a of the paper sheet 201, After winding up, blocking due to adhesion and solidification between the wound sheets is not possible.

  The present invention has been made in view of these problems, and the object thereof is a sheet material used for manufacturing a wrapping paper with a transparent window or a packaging bag having a transparent window. When a sheet material with a band-like transparent window formed by adhering a plurality of paper sheets with a gap in the width direction is wound around a take-up roll, the part of the transparent film on which the paper sheets are not laminated (crimped) It is to make it possible to manufacture the same easily without lowering its transparency.

According to the first aspect of the present invention, a transparent film unwound from a transparent film unwinding roll and a plurality of unwinding from an opaque sheet unwinding roll so as to be bonded while maintaining a gap in the width direction of the transparent film. Adhering the opaque sheet by passing between pressure-bonding rolls that press against each other;
A method of producing a sheet material with a strip-shaped transparent window, comprising a step of being wound and wound around a winding roll after being made a sheet material with a strip-shaped transparent window,
Before the transparent film and each opaque sheet are passed between the pressure-bonding rolls, the back surface forming the adhesive surface of each opaque sheet with respect to the transparent film rotates in a state where one side is immersed in the adhesive in the adhesive tank. In the method for producing a sheet material with a strip-shaped transparent window, including a step of being pressed against the surface of the adhesive application roll and applying an adhesive to the back surface of each opaque sheet,
A pressing body is disposed at a position away from the adhesive application roll and before and after the adhesive application roll, and a plurality of each of the plurality of unwinding rolls unwound from the opaque sheet winding roll by the two pressing bodies. An adhesive sheet is applied to the back surface of each opaque sheet by pressing the surface of the opaque sheet.

  The invention according to claim 2 is the belt-like transparent according to claim 1, wherein the presser body is a presser roll that rotates around an axis, and the surface of each of the plurality of opaque sheets is pressed by the outer peripheral surface thereof. It is a manufacturing method of the sheet material with a window. And invention of Claim 3 is a manufacturing method of the sheet | seat material with a strip | belt-shaped transparent window of Claim 2 which has arrange | positioned the said pressing roll in parallel with the rotating shaft and axis | shaft of an adhesive application roll. Furthermore, invention of Claim 4 is a manufacturing method of the sheet | seat material with a strip | belt-shaped transparent window of any one of Claims 1-3, wherein the said opaque sheet is a paper sheet.

  In this invention of Claim 1, an adhesive agent can be apply | coated only to the back surface (one side) which makes the adhesion surface with respect to the transparent sheet in an opaque sheet. That is, in the adhesive application step, the pressing body is separated from the adhesive application roll, and therefore the adhesive does not adhere to the surface of the pressing body. For this reason, in the sheet material with a strip-shaped transparent window manufactured by passing between the pressure-bonding rolls, the opaque sheet is not bonded, and the transparent film portion between the opaque sheets maintains the transparency of the transparent film itself. In addition, since the adhesive does not adhere to the surface of the presser body, the adhesive does not adhere to the surface of the opaque sheet, so that the manufactured sheet material with a transparent belt-like window is wound around the winding roll. Nor does it cause blocking.

  As described above, according to the manufacturing method of the present invention, although the manufacturing method is simple, the opaque sheet is not bonded, the transparency of the transparent film portion between them does not decrease, and the manufactured sheet material with a strip-shaped transparent window is manufactured. Can be wound on a winding roll without any problem. Thus, it is possible to obtain a packaging bag or package that can clearly or clearly visually recognize a product (packaged product) inside the package through a belt-shaped transparent window.

  In the present invention, as in the invention described in claim 2, the pressing body is a pressing roll that rotates about an axis, and the surfaces of a plurality of opaque sheets are pressed on the outer peripheral surface thereof. In this case, a smooth flow (outfeed) of the opaque sheet can be obtained, so that the manufacturing efficiency is improved, which is preferable. In this case, as in the invention described in claim 3, it is possible to apply the adhesive uniformly and smoothly by arranging the presser roll in parallel with the axis of rotation of the adhesive application roll. Therefore, it is particularly preferable. In the present invention, the opaque sheet is not limited to a paper sheet.

  Embodiments of the present invention will be described in detail with reference to FIGS. FIG. 1 is a side view showing a schematic configuration of a manufacturing apparatus embodying the manufacturing method of the present invention, FIG. 2 is an enlarged plan view of the main part, FIG. 3 is a perspective view for explaining the main part, 4 is a view of FIG. 1 as viewed from an arrow A. FIG.

  In the manufacturing apparatus 1 shown in FIG. 1, a transparent film (for example, polyethylene film) 101 is unwound from a transparent film unwinding roll (a roll on which a transparent film is wound) 100 in the lower right side of FIG. In this example, a paper sheet (hereinafter also referred to as a paper sheet) 201 is unwound from a paper sheet unwinding roll (roll around which the paper sheet is wound) 200 on the left side of the figure. As shown in FIG. 2, two paper sheet unwinding rolls 200 are attached to a mounting shaft 200a at a predetermined interval, and are fed into two rows of paper sheets 201 while maintaining appropriate tension. The width Wa between the outer edges of the two rows of paper sheets 201 is smaller than the width W1 of the transparent film 101 to be described later, and the outer edges of the paper sheets 201 are outside the transparent film 101. It is located slightly inside the edge. Incidentally, the outer edge of each paper sheet 201 is positioned slightly inside the left and right edges (outer edges) of the transparent film 101 because the left and right outer edge portions of the transparent film 101 are cut and removed as a margin for removal. Because.

  In the two rows of paper sheets 201 fed from the paper sheet unwinding roll 200, the back surface (one surface) 201 b on the side to be bonded to the transparent film 101 is immersed in the adhesive (liquid) 15 in the adhesive tank 11. The adhesive is applied to the back surface 201b of each paper sheet 201 by being pressed against the surface of the adhesive application roll 21 provided so as to rotate. In this embodiment, the pressure contact with the surface of the adhesive application roll 21 is a presser that is disposed at a position before and after the flow direction of the paper sheet 201 in the adhesive application roll 21 and away from the adhesive application roll 21. This is performed by pressing down the surface 201a of each paper sheet 201 with the outer peripheral surfaces of the pressing rolls 31 and 32 that rotate around the axis. That is, each paper sheet 201 is fed while maintaining an appropriate tension between the front and rear pressing rolls 31 and 32 and the adhesive application roll 21, so that the entire back surface 201 b of each paper sheet 201 in the width direction. It is comprised so that an adhesive agent may be apply | coated to. In this embodiment, both the adhesive application roll 21 and the pressing rolls 31 and 32 are straight cylindrical. The pressing rolls 31 and 32 are arranged in parallel with the rotation shaft 21 g of the adhesive application roll 21. The adhesive application roll 21 is set to rotate by a rotation driving means (not shown) in the direction opposite to the flow direction of each paper sheet 201 as indicated by an arrow in the figure, and the adhesive 15 is placed on the back surface of each paper sheet 201. It is set so as to be sufficiently applied to 201b. On the other hand, an adhesive stabilization roll (doctor roll) 23 is provided in the tank 11 so as to be pressed in parallel with the adhesive application roll 21 so as to prevent application of excessive adhesive 15.

  Each paper sheet 201 pressed onto the adhesive application roll 21 and applied with the adhesive 15 is sent into the upper dryer 41 in FIG. 1 and the solvent contained in the adhesive 15 is separated and removed. Thus, each paper sheet 201 fed out of the dryer 41 via the feed rollers 43 and 45 in the dryer 41 is wound around the tension roller 47 and unwound from the transparent film unwinding roll 100 at the lower right of FIG. As shown in FIG. 4 so as to be overlaid on the transparent film 101, it is passed between the pressure-bonding rolls 51 and 52, and is adhered to the transparent film 101 with an adhesive applied to the back surface 201b of each paper sheet 201. It becomes the sheet material 121 with a transparent window, and is comprised so that it may wind up by the winding roll 130 subsequently. When the two rows of paper sheets 201 are stacked on the transparent film 101 having a predetermined width W1 and passed between the pressure-bonding rolls 51 and 52, as shown in FIG. The outer edge 201 is set so as to be located slightly inside the left and right edges (outer edges) of the transparent film 101.

  In the apparatus of the present embodiment, an appropriate rotation is applied to the winding rolls 130 for winding the pressure-bonding rolls 51 and 52 and the sheet material 121 with the strip-shaped transparent window, and an appropriate tension is applied to the transparent film 101 and the paper sheet 201. It is held and set to feed at a moderate feed rate. The arrows in the figure indicate their rotational direction or feed (flow) direction. Note that, as described above, the adhesive application roll 21 is set to rotate in the direction opposite to the feeding direction of the paper sheet 201 in this embodiment. Further, a feed roll or a tension roll that is rotationally driven may be attached to an appropriate position in order to provide stable feeding of the transparent film 101 and the paper sheet 201 and appropriate tension.

In the manufacturing method of this embodiment, as described above, the position is away from the adhesive application roll 21 for applying the adhesive 15 to the back surface 201b of the paper sheet 201, and the adhesive application roll 21 is The presser rolls 31 and 32 that rotate as two presser bodies are arranged before and after the flow direction, and the presser rolls 31 and 32 press the front surface 201a of the paper sheet 201 to adhere to the back surface 201b. An agent is applied. For this reason, the adhesive 15 is applied only to the back surface 201b that forms an adhesive surface of the paper sheet 201 to the transparent film 101 in the coating process. That is, in the application process of the adhesive 15, since the pressing rolls 31 and 32 are separated from the adhesive application roll 21, the adhesive does not adhere to the surfaces of the pressing rolls 31 and 32.
Thus, in the manufacturing method of this embodiment, the sheet material 121 with a strip-shaped transparent window manufactured by passing between the pressure-bonding rolls 51 and 52 is the same as that shown in FIG. Since the adhesive is not applied to the portion where the sheet 201 is not adhered, that is, the transparency of the transparent film 101 itself is maintained in the portion of the transparent film 101 (the portion K1 in FIG. 6) between them. Further, since the adhesive does not adhere to the surfaces of the pressing rolls 31 and 32, the adhesive does not adhere to the surface 201 a of the paper sheet 201, so that the manufactured sheet material 121 with a strip-shaped transparent window is wound up. Even when wound on the roll 130, blocking does not occur. As described above, according to the manufacturing method of the present embodiment, the sheet material 121 with a strip-shaped transparent window that does not have a decrease in the transparency of the transparent film 101 part between the paper sheets 201 to which the paper sheet 201 is not bonded is wound by the manufacturing apparatus with a simple configuration. Even if it is wound on the roll 130, it can be manufactured without any trouble.

  In the embodiment described above, the pressing body is the pressing rolls 31 and 32 that rotate around the axis, and the surface 201a of each of the plurality of paper sheets 201 is pressed by the outer peripheral surface thereof. Sending out is obtained. In addition, since the two pressing rolls 31 and 32 are arranged in parallel with the rotation shaft 21g of the adhesive application roll 21, the adhesive 15 can be applied uniformly and smoothly.

  Further, in the above embodiment, the presser body is embodied as the presser rolls 31 and 32 that rotate about the axis, but the presser body in the present invention is not necessarily required to be a presser roll that rotates about the axis. Absent. That is, the cylindrical body that does not rotate may be arranged so that the axis of rotation of the adhesive application roll 21 is parallel to the axis of rotation 21g. However, as long as there is no problem in the application of the adhesive to the opaque sheet such as a paper sheet and the flow or delivery of the opaque sheet, there is no problem even if both are not parallel. In addition, if it does not rotate, even if the pressing body is not a cylindrical body, for example, the cross section perpendicular to the axis is a split circle (crescent moon) or a semicircular shape, and the opaque sheet is pressed on the arc side. You may do it.

  In the above embodiment, the pressing rolls 31 and 32 are held in front of and behind the adhesive application roll 21, that is, on the downstream side and the upstream side where the paper sheet 201 flows, with a predetermined distance from the adhesive application roll 21. Although each one is arranged, this arrangement position may be a position where the adhesive is not applied to the pressing rolls 31 and 32 and is applied only to the back surface (bonding surface to the transparent film) 201b of the paper sheet 201. That's fine. A plurality of pressing bodies such as the pressing rolls 31 and 32 may be arranged before and after the adhesive application roll 21.

  In the said form, although the transparent film was demonstrated in the case of the polyethylene film, this raw material can be embodied in an appropriate raw material (film). In addition, although a paper sheet has been described as an example of the opaque sheet, the opaque sheet in the present invention is not limited to the paper sheet, and may be a plastic sheet (opaque film) or an aluminum foil, as long as it is opaque. It may be a laminated or adhesive sheet.

  Further, in the above embodiment, the two sheets of paper sheets 201 are bonded to the portions near the both side edges of the transparent film 101 so that the outer edges thereof are along the intermediate film in the width direction of the transparent film 101 sandwiched between the paper sheets 201. Although the description has been given of the case of manufacturing the sheet material with a strip-shaped transparent window 121 in which the strip-shaped transparent window is formed, the sheet material with the strip-shaped transparent window in the present invention is not limited to such a material. Specifically, as shown in FIG. 5, three rows of paper sheets 201 are bonded to the intermediate portion in the width direction of the transparent film 101 and the portions near both side edges, and the transparent film 101 sandwiched between the paper sheets 201. Even in the case of manufacturing the sheet material 122 with a strip-shaped transparent window in which two rows of strip-shaped transparent windows are formed, it can be embodied in the same manner. That is, in this case, the paper sheet 201 may be sent out from the three paper sheet unwinding rolls while maintaining a predetermined interval. In addition, after the sheet material 122 with a strip-like transparent window formed by adhering the three rows of paper sheets 201 by pressure bonding is wound on a winding roll after pressure bonding, By cutting at the center in the width direction (broken line in the figure) (slit process), the same sheet material with a strip-shaped transparent window as described above can be simultaneously produced.

The schematic structure side view of the manufacturing apparatus which actualized the manufacturing method of this invention, and the enlarged view of the principal part. The figure which looked at the principal part of FIG. 1 from the top (enlarged plan view). The perspective view for description of FIG. The figure which looked at FIG. 1 from the arrow A. FIG. The perspective view explaining another example of a sheet material with a belt-like transparent window. The perspective view explaining the sheet | seat material with a strip | belt-shaped transparent window. The schematic structure (concept) side view of the manufacturing apparatus which manufactures the sheet material with a conventional strip | belt-shaped transparent window. The enlarged view for description which looked at the crimping | compression-bonding part of the paper sheet and transparent film in FIG. The BB sectional drawing in FIG. 6 explaining the problem of the conventional sheet | seat material with a strip | belt-shaped transparent window. The schematic structure (concept) side view of the manufacturing apparatus by another considered manufacturing method. The perspective view for description of the application | coating state of the adhesive agent with respect to the paper sheet explaining the problem in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Adhesive tank 15 Adhesive 21 Surface 21g of adhesive application roll Rotating shafts 31 and 32 of adhesive application roll Pressing roll (pressing body)
51, 52 Pressure roll 100 Transparent film unwinding roll 101 Transparent film 121 Sheet material 130 with strip-shaped transparent window Winding roll 200 Opaque sheet unwinding roll 201 Paper sheet (opaque sheet)
201a Paper sheet surface (opaque sheet surface)
201b Back side of paper sheet (back side of opaque sheet)

Claims (4)

A pressure-sensitive adhesive film in which a transparent film unwound from a transparent film unwinding roll and a plurality of non-transparent sheets unwound from an opaque sheet unwinding roll are pressed against each other so as to be bonded in the width direction of the transparent film. Adhering by passing between rolls;
A method of producing a sheet material with a strip-shaped transparent window, comprising a step of being wound and wound around a winding roll after being made a sheet material with a strip-shaped transparent window,
Before the transparent film and each opaque sheet are passed between the pressure-bonding rolls, the back surface forming the adhesive surface of each opaque sheet with respect to the transparent film rotates in a state where one side is immersed in the adhesive in the adhesive tank. In the method for producing a sheet material with a strip-shaped transparent window, including a step of being pressed against the surface of the adhesive application roll and applying an adhesive to the back surface of each opaque sheet,
A pressing body is disposed at a position away from the adhesive application roll and before and after the adhesive application roll, and a plurality of each of the plurality of unwinding rolls unwound from the opaque sheet winding roll by the two pressing bodies. A method for producing a sheet material with a strip-shaped transparent window, characterized in that an adhesive is applied to the back surface of each opaque sheet by pressing the surface of the opaque sheet.   The manufacturing method of the sheet | seat material with a strip | belt-shaped transparent window of Claim 1 which used the said pressing body as the pressing roll rotated around an axis line, and pressed down the surface of each of several opaque sheet | seats on the outer peripheral surface.   The manufacturing method of the sheet | seat material with a strip | belt-shaped transparent window of Claim 2 which has arrange | positioned the said pressing roll in parallel with the rotating shaft and axis | shaft of an adhesive application roll. The said opaque sheet is a paper sheet, The manufacturing method of the sheet | seat material with a strip | belt-shaped transparent window of any one of Claims 1-3 characterized by the above-mentioned.

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