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1. 发明专利

JPH09188056A METHOD AND APPARATUS FOR STENCIL PRINTING, INK COVER SHEET AND STENCIL BASE SHEET UNIT 失效
公开(公告)号：JPH09188056A
公开(公告)日：1997-07-22
申请号：JP2048096
申请日：1996-01-10
申请人： RISO KAGAKU CORP
发明人： TAKAHASHI MASAHIRO , KURITA SHOJI , IKEZAWA TERU , WATANABE HIDEO
IPC分类号： B41L13/02 , B41L13/18
摘要： PROBLEM TO BE SOLVED: To prevent the formation or adherence of air reservoir between an ink cover sheet and a diaphragm or and to obtain a uniform printing image density and excellent operability by forming the surface of the sheet in contact with the diaphragm in a rough surface. SOLUTION: This stencil base sheet unit comprises stencil base sheet S extended under tension in a frame F and an ink cover sheet C openably adhered to the frame F so as to cover the sheet S. The sheet S is constituted by a film at least the opposite surface of which to the sheet S side is roughed. At the time of printing, a diaphragm 21 is brought into close contact with the sheet C of the unit, deformed so as to lap ink lump on the sheet S, pressed at the sheet S by the diaphragm 21 and brought into close contact with a print sheet P on a printing sheet mounting surface 13. At this time, since the surface of the sheet C in close contact with the diaphragm 21 is rough, no bubble-like air reservoir is formed between the both, and uniform force is applied to the lump.

2. 发明专利

JPH08197707A METHOD FOR PLATE PROCESSING OF ORIGINAL PAPER FOR STENCIL PRINTING AND ORIGINAL PAPER FOR STENCIL PRINTING 失效
公开(公告)号：JPH08197707A
公开(公告)日：1996-08-06
申请号：JP1013495
申请日：1995-01-25
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO , WATANABE HIDEO , TAKAHASHI MASAHIRO
IPC分类号： B41C1/14 , B41N1/24
摘要： PURPOSE: To prepare directly and simply a stencil printing plate with high quality without using an expensive printing plate-manufacturing apparatus by bringing a solvent sprayed from a nozzle into selective contact with the surface of a solvent- soluble film of an original paper for stencil printing prepd. by laminating the solvent- soluble film with a specified value of the angle of contact to the solvent on a porous substrate. CONSTITUTION: A resin soln. prepd. for example, by dissolving a solvent-soluble resin into a solvent is applied on a non-adhesive substrate 2 and it is dried to form a solvent- soluble resin film 1. Then, the solvent-soluble resin film 1 formed on the non-adhesive substrate 2 is laminated e.g. on a porous substrate 4 on the surface of which an adhesive or an adhesive layer 3 is formed. After the non-adhesive substrate 2 is peeled off, a layer 5 e.g. adjusted in such a way that the angle of contact to a solvent is in the range of 40-100 deg. is formed on the face of the solvent-soluble resin film 1. In this original paper 6 for stencil printing, a solvent is sprayed on the solvent-soluble resin film 1 under a non-contacting condition by means of a solvent spraying apparatus equipped with a solvent spraying nozzle and the parts brought into contact with the solvent are perforated with the solvent.

3. 发明专利

JPH091910A METHOD AND APPARATUS FOR STENCIL PRINTING 失效
公开(公告)号：JPH091910A
公开(公告)日：1997-01-07
申请号：JP17962095
申请日：1995-06-23
申请人： RISO KAGAKU CORP
发明人： TAKAHASHI MASAHIRO , IKEZAWA TERU , WATANABE HIDEO
IPC分类号： B41L13/02 , B41L13/18
摘要： PURPOSE: To provide a method and an apparatus for stencil printing with a stencil engraving function capable of printing many printing surfaces of a large size without density irregularity and accurately engraving by a copying type by emitting a light even by a stencil base sheet of a large size. CONSTITUTION: A stencil base sheet S is supported between a diaphragm and an original D or a print sheet P in a pressure chamber 23 formed at the partial wall of a flexible and/or elastic diaphragm 21, and the chamber is pressure- reduced to bring the engraving base sheet into close contact with the original or the print sheet by the pressing force of the diaphragm. The elongation at break of the diaphragm is 100% or more, 100% modulus is 1000kg/cm or less, and preferably the entire light ray permeability is 30% or more.

4. 发明专利

JPH08150789A SCREEN PROCESS PRINTING BASE PAPER AND ITS MANUFACTURE 失效
公开(公告)号：JPH08150789A
公开(公告)日：1996-06-11
申请号：JP29334094
申请日：1994-11-28
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO , WATANABE HIDEO , TAKAHASHI MASAHIRO
IPC分类号： B41N1/24
摘要： PURPOSE: To provide a screen process printing base paper and also provide a manufacturing method in which a solvent soluble resin film of uniform and thin film thickness can be stuck to a porous substrate easily and inexpensively. CONSTITUTION: (1) A screen process printing base paper 5 is formed by sticking a solvent soluble resin film 1 of 0.1-100μm thickness on a porous substrate 3, and a release agent is contained in the solvent soluble resin film 1 of the screen process printing base paper 5. (2) The containing amount of the release agent referred in (1) is in the range of 0.01-20wt.% to the gross weight of the solvent soluble resin film 1 of the screen process printing base paper 5. (3) The solvent soluble resin film 1 containing the release agent is formed on a non-bonding substrate 2, and the solvent soluble resin film 1 and the porous substrate 3 are stuck together by a bonding agent or heat fusion bonding, and then a non-bonding substrate 2 is released off the solvent soluble resin film 1 containing the release agent in the manufacturing method of the screen process printing base paper 5.

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