JPS6126058Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stencil ink supply sheet for supplying ink to stencil paper.

A porous material consisting of a sheet-like frame made of cardboard, plastic, etc., and having an ink supply window, and Japanese paper, etc., extending across the ink supply window and fixed to one side of the frame at the periphery. An ink supply sheet for stencils has already been proposed, which includes a porous sheet and is configured to supply hard gel ink as a relatively thick layer onto the porous sheet.
Regarding the ink supply sheet for stencil printing as described above,
By applying pressure to the ink supplied onto the porous sheet by a printing roller or the like from the other side of the frame, the ink is controlled to cover the porous sheet according to the porosity of the porous sheet. the porous sheet is placed in contact with the porous sheet on one side of the stencil sheet.

However, in the case of the above-mentioned stencil ink supply sheet, the frame has relatively high rigidity, so even if the frame is pressed against the stencil paper during printing, the frame does not necessarily cover all of the stencil paper. In some cases, the frame does not come into close contact with the stencil paper, and a gap is formed between the frame and the stencil paper, extending from the periphery of the ink supply window. If there is a gap as described above, there is a risk that the ink that has passed through the porous sheet will enter the gap and the ink will leak out from the frame. This spilled ink stains the equipment, printing paper, and workers' clothing.

SUMMARY OF THE INVENTION In view of the above-mentioned problems with conventional ink supply sheets for stencils, an object of the present invention is to provide an ink supply sheet for stencils that is improved so that the ink does not protrude outside the frame.

According to the present invention, this object includes a sheet-like frame body having an ink supply window, and a porous sheet extending across the ink supply window and fixed to the frame body at a peripheral edge. , an ink supply sheet for stencil printing is formed such that a layer of ink is applied over the entire area limited by the frame on the surface of the porous sheet, and the ink supply window is defined. A flexible ink that is provided along the inner peripheral edge of the frame so as to overlap and protrude inward from the inner peripheral edge in contact with the porous sheet, and is easily bent by pressure applied to the ink layer. This is achieved by an ink supply sheet for stencil printing which is characterized by having an impermeable zone.

According to this configuration, when pressure is applied to the ink supplied on the porous sheet during printing, the ink passes through the porous sheet located inside the ink impervious zone and is placed in contact with the porous sheet. At this time, the ink-impermeable zone is pressed against the stencil paper by the pressure applied to the ink above it, and is brought into close contact with the stencil paper, causing the frame and the stencil paper to pass through the ink supply window. A seal will be formed around the periphery of the Due to the above-mentioned sealing effect of the ink-impermeable zone, the ink that has passed through the porous sheet is prevented from entering between the frame and the stencil paper from the periphery of the ink supply window, and the ink is prevented from protruding outside from the frame. is prevented.

FIG. 1 is a perspective view showing one embodiment of a stencil ink supply sheet according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view thereof. In the figure, reference numeral 1 indicates a rectangular frame. This frame 1 is in the form of a sheet with a relatively large thickness, and is made of cardboard, plastic, wood, metal, etc. It has a rectangular ink supply window 2 inside. A peripheral portion of a porous sheet 3 extending across the ink supply window 2 is adhered to one surface of the frame 1 with an adhesive. The porous sheet 3 may be a mesh-like screen made of Japanese paper, non-woven fabric, synthetic resin, or metal, as long as it allows hard ink to pass through it to an appropriate extent. Further, one side edge of an ink impermeable sheet 4 made of plastic film or the like is adhered to the other surface of the frame 1 with an adhesive or the like. The ink-impermeable sheet 4 is adhered to the frame 1 at its periphery using an adhesive tape 6 attached to the other side of the frame 1 in a manner that allows it to be repeatedly peeled off. It cooperates with the porous sheet 3 to define an ink storage chamber 5.

Further, an ink impermeable sheet 7 is adhered to the one surface of the frame body 1 from above the porous sheet 3 with an adhesive, and this ink impermeable sheet 7 is attached to the ink supply window 2. An ink impermeable zone 8 is formed that extends in a strip shape along the inner peripheral edge.

FIG. 3 is an enlarged sectional view showing the procedure for stencil printing using the ink supply sheet according to the present invention shown in FIGS. 1 and 2. FIG. In FIG. 3, 9 indicates the printing ink filled in the ink storage chamber 5.
1 indicates a stencil paper having perforations 11, and 12 indicates a printing paper. The stencil paper 10 is placed overlappingly on one side of the porous sheet 3, and the printing paper 1
2 is placed in contact with the stencil paper 10. When pressure is applied to the printing ink 9 by the printing roller 13 from the side of the ink-impermeable sheet 4, the printing ink 9 passes through the porous sheet 3 and further passes through the perforations 11 of the stencil paper 10. It adheres to the printing paper 12. During this printing, the ink impervious zone 8
is pressed against the stencil paper 10 by the pressure applied to the printing ink 9 and comes into close contact with the stencil paper 10. Therefore, the printing ink that has passed through the porous sheet 3 is transferred to the ink impermeable zone 8 and the stencil paper 1.
0 is prevented.

FIGS. 4 and 5 are longitudinal cross-sectional views showing other embodiments of the ink supply sheet for stencil printing according to the present invention. In FIGS. 4 and 5, parts corresponding to those in FIG. 2 are designated by the same reference numerals as in FIG. 2. In the embodiment shown in FIG. 4, the ink impervious zone 8 is integrally formed with the frame 1 within the ink storage chamber 5. In the embodiment shown in FIG.

Further, in the embodiment shown in FIG. 5, the ink-impermeable zone 8 is constituted by an ink-impervious material coated on the porous sheet 3 in the form of a film. Further, the ink impermeable zone 8 may be constituted by an ink impermeable material impregnated into the porous sheet 3.

In the embodiment shown in FIGS. 4 and 5, the ink impervious zone 8 is provided along the inner peripheral edge of the ink supply window 2, so that the ink does not pass through the porous sheet 3 during printing. Printing ink is prevented from protruding to the outside of the frame 1.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the ink supply sheet for stencil printing according to the present invention, FIG. 2 is an enlarged vertical cross-sectional view thereof, and FIG. 3 is the present invention shown in FIGS. 1 and 2. FIGS. 4 and 5 are longitudinal sectional views showing other embodiments of the stencil ink supply sheet according to the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Frame body, 2... Ink supply window, 3... Porous sheet, 4... Ink impervious sheet, 5... Ink storage chamber, 6... Adhesive tape, 7... Ink impermeable sheet, 8 ...Ink-impermeable zone, 9...Printing ink, 10...Stencil paper, 11...Perforation section, 1
2...Printing paper, 13...Printing roller.

Claims (1)

[Scope of utility model registration request] a sheet-like frame body having an ink supply window; and a porous sheet extending across the ink supply window and fixed to the frame body at a peripheral edge; An ink supply sheet for stencil printing is provided in which a layer of ink is applied over the entire area limited by the frame, and the ink is applied along the inner peripheral edge of the frame defining the ink supply window. It is characterized by having a flexible ink-impermeable zone that is provided so as to overlap and protrude in contact with the porous sheet inward from the inner peripheral edge, and that is easily bent by pressure applied to the ink layer. Ink supply sheet for duplicating.