JPH0574865U - Master plate for stencil printing - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a stencil printing plate which does not stain the surface of the stencil sheet even if it is placed randomly with the heat-sensitive stencil sheet down after plate making. [Structure] The frame 18 has an opening 18a corresponding to the size of the non-woven fabric 16 and three protrusions 18c at the center thereof. The convex portion 18c is attached to a stamp member described later so that the convex portion 18c does not bend when pressed against a printing sheet and does not interfere with printing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stencil printing plate.

[0002]

[Prior Art]

 Conventionally, as an example of an original plate for stencil printing used in a stamp device for stencil printing, one proposed by the specification and drawings attached to the application of Japanese Patent Application No. 4-6505 proposed by the applicant of the present application There is. The stencil printing plate will be described with reference to FIGS. 7 to 9.

As shown in FIGS. 7 and 8, the stencil printing plate 50 includes a heat-sensitive stencil sheet 52 including a thermoplastic film 62, a porous support 66 and an adhesive layer 64, a separator 54, and a separator 54. A non-woven fabric 56 which is a porous support impregnated with ink, a frame 58 having an opening 58a surrounding the non-woven fabric 56, and a film 60 which is an ink impermeable base material are sequentially laminated. It is configured. In the stencil printing plate 50, a perforated image is formed by heating and melting the surface of the thermoplastic film 62 of the heat-sensitive stencil sheet 52 with a plate making apparatus using a thermal head, for example. Hereinafter, the formation of the perforated image is referred to as plate making.

Next, the stencil printing plate 50 thus prepared is mounted on a stamp member 74 having a grip as shown in FIG. The stamp member 74 includes a handle portion 76, a cushion layer 78, and an adhesive layer 80. Then, after the separator 54 is pulled out, the stamp member 74 is pressed against the printing paper 82 to perform stencil printing.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned stencil printing plate, when the heat-sensitive stencil printing paper side is placed face down after printing, the ink in the stencil printing plate bleeds out when printed on a printing paper. There was a risk of soiling the paper.

The present invention has been made in order to solve the above-mentioned problems, and is for stencil printing that does not stain the surface of the stencil even if it is placed randomly with the heat-sensitive stencil sheet underneath after plate making. The purpose is to provide a master plate.

[0007]

[Means for Solving the Problems]

 In order to achieve this object, the stencil printing plate of the present invention comprises a heat-sensitive stencil sheet obtained by adhering a thermoplastic film and a multi-porous support, and a heat-sensitive stencil sheet arranged on the side of the porous support. The ink impregnated body, the ink impermeable base material, and the frame body provided between the heat-sensitive stencil sheet and the base material and surrounding the impregnated body are laminated. The protective member is provided so as to project from the frame body and prevents the heat-sensitive stencil sheet from coming into contact with other objects.

[0008]

[Action]

 The stencil printing plate of the present invention having the above-described structure is produced by a plate making apparatus using, for example, a thermal head. Then, the stencil printing plate made by plate making is mounted on the stamp member, and the stamp member is pressed against the printing paper. Done.

At this time, even if the stencil printing plate after plate making is placed randomly with the heat-sensitive stencil sheet facing down, the heat-sensitive stencil sheet is always in a floating state due to the action of the protective member, and the placed surface is soiled. There is no such thing.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a stencil printing plate 10 of this embodiment, and FIG. 2 is an exploded perspective view of the same. The stencil sheet 10 is roughly divided into a frame having a heat-sensitive stencil sheet 12, a non-woven fabric 16 impregnated with ink, an opening 18a surrounding the non-woven fabric 16 and three convex portions 18c. The body 18 and a film 20, which is an ink impermeable base material, are sequentially laminated.

As shown in FIG. 3, the heat-sensitive stencil sheet 12 is composed of a thermoplastic film 22, an adhesive layer 24, and a porous support 26. The thermoplastic film 22 of this embodiment is a polyethylene terephthalate film having a thickness of 2 μ (hereinafter abbreviated as PET film), but other films such as polypropylene and vinylidene chloride-vinyl chloride copolymer are also available. Can be mentioned. The thickness of the PET film is preferably 1 μm to 4 μm. If the thickness is less than 1 μm, the manufacturing cost is high, the strength is weak and it is not practical, and if the thickness is 4 μm or more, a general thermal head having a rating of about 50 mJ / mm ² is too thick to perforate.

The porous support 26 is made of, for example, a natural fiber such as Manila hemp, kozo, mitsumata, a synthetic fiber such as polyethylene terephthalate, polyvinyl alcohol, polyacrylonitrile, or a semi-synthetic fiber such as rayon as a main raw material. Thin paper is used. The heat-sensitive stencil sheet 12 configured as described above is adhered to the frame body 18 on four sides by the adhesive layers 28 as shown in FIG.

As shown in FIG. 2, the frame 18 made of synthetic resin has an opening 18a corresponding to the size of the non-woven fabric 16 and three protrusions 18c in the center. The convex portion 18c is designed so as not to bend when the original plate 10 for stencil printing is mounted on a stamp member to be described later and then press the printing paper so as not to interfere with printing. The height of the convex portion 18c is preferably 1.5 to 3 mm higher than that of the heat-sensitive stencil sheet 12. If it is 1.5 mm or less, the heat-sensitive stencil sheet 12 may contact the printing surface when the printing surface is uneven, and if it is 3 mm or more, the stamp member must be pressed with a strong force.

Since the ink impregnated in the non-woven fabric 16 is an oil-based ink, the material of the frame 18 is vinyl chloride, polypropylene, polyethylene, polyacetal, polyethylene terephthalate or the like which is not attacked by the oil-based ink.

The non-woven fabric 16 is impregnated with the oil-based ink in a saturated state, and the impregnated ink oozes out when pressure is applied to the non-woven fabric 16. The nonwoven fabric 16 of this embodiment uses synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate. The thickness of the non-woven fabric 16 is preferably set to ½ or more and 3 times or less the thickness of the frame body 18. If the thickness is too thin, the heat-sensitive stencil sheet 12 will enter the inside of the frame 18 during plate making and will not contact the thermal head, making it impossible to perforate. On the other hand, if the thickness is too large, the pressing force of the thermal head compresses the non-woven fabric 16 and causes it to protrude from the frame 18. In such a state, the stencil printing master plate 10 cannot be transported by the frame 18 during plate making. Therefore, variations in the thickness of the non-woven fabric 16 cause unevenness in the carrier feed pitch of the stencil printing master plate 10, and skew feeding. Then, there arises a problem such as transportation. At the time of plate making, it is preferable that the non-woven fabric 16 is compressed by the pressing force of the thermal head to have the same thickness as the frame 18.

An adhesive layer 32 is applied to the upper surface (hatched portion in FIG. 2) of the film 20, which is an ink impermeable substrate, and adheres the frame 18 and the nonwoven fabric 16. As the film 20 of this embodiment, a resin film made of vinyl chloride, polypropylene, polyethylene, polyethylene terephthalate or the like which is not attacked by the oil-based ink is used.

Next, the operation will be described. First, the stencil printing plate 10 described above is made by a plate making apparatus (not shown). As the plate-making device, for example, a device for making a mirror image on the surface of the thermoplastic film 22 of the heat-sensitive stencil sheet 12 by a thermal head according to the print information and then punching by heating and melting the thermoplastic film 22 is used. The stencil printing master plate 10 after plate making is mounted by adhering the film 20 surface side of the stencil printing master plate 10 to the adhesive layer 40 of the stamp member 34, as shown in FIG. The stamp member 34 includes a handle portion 36, a cushion layer 38, and an adhesive layer 40. Then, as shown in FIG. 5, when the stamp member 34 is pressed against the printing paper 42, the non-woven fabric 16 is compressed and the impregnated ink oozes out from the perforated portion of the printing surface to transfer the ink to the printing paper 42. At this time, as described above, the convex portion 18c is bent so as not to interfere with printing.

Here, even if the stencil printing plate 10 after plate making is left unattended with the heat-sensitive stencil sheet 12 facing down, the heat-sensitive stencil sheet 12 is always in a floating state due to the action of the convex portion 18c. , It doesn't stain the surface.

As is clear from the above description, in the stencil printing plate 10 of the present embodiment, the convex portions 18c as the protective member of the heat-sensitive stencil sheet 12 are arranged in the frame 18 at three places. Therefore, even if the heat-sensitive stencil sheet 12 is placed in a random state after the plate-making, the heat-sensitive stencil sheet 12 is always in a floating state, so that the placed surface is not soiled. Also, when the stencil printing plate 10 is mounted on the stamp member 34 for printing, the convex portion 18c bends and does not interfere with printing.

The present invention is not limited to the embodiments described in detail above, and modifications can be made without departing from the spirit of the invention. For example, as shown in FIG. 6, a rib 118e that is easily elastically deformed may be provided on the frame body 118 to serve as a protection member.

[0021]

[Effect of the device]

 As is clear from the above description, in the stencil printing plate of the present invention, even if the heat-sensitive stencil sheet is left unattended after plate-making, the heat-sensitive stencil sheet will always float due to the action of the protective member. Since it is in the open state, it does not stain the placed surface.

[Brief description of drawings]

FIG. 1 is a sectional view of a stencil printing plate of the present embodiment.

FIG. 2 is an exploded perspective view of a stencil printing plate of the present embodiment.

FIG. 3 is a sectional view of a heat-sensitive stencil sheet.

FIG. 4 is a side view illustrating a state where a stencil printing plate is mounted on a stamp member.

FIG. 5 is a side view illustrating a state in which a stencil printing plate is mounted on a stamp member and printed.

FIG. 6 is an exploded perspective view of a stencil printing plate according to another embodiment.

FIG. 7 is a cross-sectional view of a conventional stencil printing plate.

FIG. 8 is a sectional view of a heat-sensitive stencil sheet.

FIG. 9 is a side view illustrating a state in which a conventional stencil printing plate is mounted on a stamp member.

[Explanation of symbols]

 10 Stencil printing plate 12 Heat-sensitive stencil paper 16 Nonwoven fabric 18 Frame 18c Convex portion 20 Film 22 Thermoplastic film 24 Porous support 110 Stencil printing plate 118 Frame 118e Rib

Claims (1)

[Scope of utility model registration request] 1. A heat-sensitive stencil sheet obtained by adhering a thermoplastic film and a porous support, an impregnated body which is arranged on the porous support side of the heat-sensitive stencil sheet and impregnated with ink, and an ink. A stencil printing plate comprising an impermeable substrate, a heat sensitive stencil sheet, and a frame body provided between the substrate and surrounding the impregnated body, wherein the frame is a frame. An original plate for stencil printing, comprising a protective member which is provided so as to project from the body and prevents the heat-sensitive stencil sheet from contacting another object.