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1. 发明专利

JP2002137530A STENCIL PRINTING METHOD AND EQUIPMENT 失效
公开(公告)号：JP2002137530A
公开(公告)日：2002-05-14
申请号：JP2000334895
申请日：2000-11-01
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO
IPC分类号： B41L13/04 , B41M1/12
摘要： PROBLEM TO BE SOLVED: To reduce a waste of printing paper and consequently reduce a printing cost and a waste of resources by a method wherein printing conditions for obtaining a proper dot gain is set without requiring excessive trial proofing. SOLUTION: A stencil printing method comprises a step (a) of obtaining the range of Δ√ Pt (Δ√ Pt is represented by the function of a pressure welding force F and a printing speed f for realizing a proper dot gain, a step (b) of memorizing the range of Δ√ Pt controllable by a plate cylinder and a step (c) of making a user to select the pressure welding force F or the printing speed f from overlapped ranges when the ranges of Δ√ Pt obtained at the steps (a) and (b) overlap with each other.

2. 发明专利

JPH10152637A EMULSION INK FOR STENCIL PRINTING AND STENCIL PRINTING PROCESS 失效
公开(公告)号：JPH10152637A
公开(公告)日：1998-06-09
申请号：JP32787396
申请日：1996-11-22
申请人： RISO KAGAKU CORP
发明人： MATSUURA MASAHIRO , NAKAMURA YASUO , OKUDA SADANAO
IPC分类号： B41M1/12 , C09D11/02 , C09D11/0235 , C09D11/037
摘要： PROBLEM TO BE SOLVED: To provide an emulsion ink for stencil printing which is highly concentrated and less blotting and can give printed matter made proof against offset because of the improved fixation of the colorant remaining on and near the surface of paper and to provide a process for stencil printing therewith. SOLUTION: This ink is a water-in-oil (W/O) emulsion ink containing a water-insoluble colorant in the water phase, wherein a heat-meltable component of a thermosetting component insoluble in the ink is contained. The mean- particle diameter of the heat-meltable component or the thermosetting component is desirably 0.01-10μm. When stencil printing is performed with this ink, and the obtained printed matter is heat-treated, the ink can be rapidly fixed. If a silicone oil is added to the ink, offset to a heat treatment means such as rollers can be reduced without fail.

3. 发明专利

JPH10140067A EMULSION INK FOR MIMEOGRAPH PRINTING 失效
公开(公告)号：JPH10140067A
公开(公告)日：1998-05-26
申请号：JP31289296
申请日：1996-11-08
申请人： RISO KAGAKU CORP
发明人： HAYASHI YOSHIHIRO , OKUDA SADANAO , NAKAMURA YASUO
IPC分类号： C09D11/02 , C09D11/0235 , C09D11/033 , C09D11/037
摘要： PROBLEM TO BE SOLVED: To provide an emulsion ink for mimeograph printing that has a high printing conceptration without blur in characters or solid part with reduced blotting and print-through in a water-in-oil(W/O) type emulsion ink containing a water-insoluble coloring agent in the water phase. SOLUTION: This water-in-oil(W/O) type emulsion ink contains the water insoluble coloring agent in the water phase as well as contains another coloring agent in the oil phase. The coloring agent in the oil phase may be a pigment and/or a dye and the amount of the coloring agent in the oil phase is preferably 0.1-500wt.% based on the coloring agent in the water phase.

4. 发明专利

JPH10120960A ULTRAVIOLET-CURABLE EMULSION INK FOR MIMEOGRAPHIC PRINTING 失效
公开(公告)号：JPH10120960A
公开(公告)日：1998-05-12
申请号：JP29764596
申请日：1996-10-18
申请人： RISO KAGAKU CORP
发明人： IKEJIMA SHOICHI , NAKAMURA YASUO
IPC分类号： C09D11/0235 , C09D11/033 , C09D11/037 , C09D11/10 , C09D11/101 , C09D11/104 , C09D11/106 , C09D11/107 , C09D11/108
摘要： PROBLEM TO BE SOLVED: To obtain a W/O-type emulsion ink having improved dryability and temperature suitability, high printing density and little problems of ink blotting, etc., by including a water-insoluble colorant in the water phase and a UV- curable resin in the oil phase, thereby facilitating the dispersion of pigment particles. SOLUTION: This W/O-type emulsion ink composed of an oil phase and a water phase contains a water-insoluble colorant (preferably a colorant having high affinity to water such as carbon black) in the water phase and a UV- curable resin in the oil phase. The average particle diameter of the water- insoluble colorant is preferably

5. 发明专利

JPH08324147A STENCIL SHEET AND ENGRAVING METHOD THEREFOR 失效
公开(公告)号：JPH08324147A
公开(公告)日：1996-12-10
申请号：JP13170195
申请日：1995-05-30
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO
IPC分类号： B41C1/14 , B41N1/24
摘要： PURPOSE: To provide a stencil sheet capable of being directly and lightly engraved from an electronic original formed by a computer or a word processor without using an expensive engraving unit, easily perforated with water solvent at the time of engraving and having excellent resistance to emulsion ink containing water at the time of printing and a method for engraving the same. CONSTITUTION: (1) The stencil sheet 5 is obtained by laminating a solvent soluble resin film 1 containing polyvinyl acetal resin having 2 to 89mol% of acetalization degree to a porous support 4. (2) The method for engraving the perforated stencil sheet 5 comprises the steps of selectively bringing the solvent into contact with the surface of the film of the sheet 5, dissolving the film 1 of the contact part, and perforating it. (3) The method for engraving the stencil sheet uses the solvent containing organic solvent to be incorporated in water. (4) The method for engraving the stencil sheet uses the organic solvent to be incorporated in water and containing polyhydric alcohol in such at least one hydroxyl group is substituted for 1-4C alkoxy group.

6. 发明专利

JPH11208089A METHOD AND APPARATUS FOR PREDICTING DENSITY OF STENCIL PRINTING 失效
公开(公告)号：JPH11208089A
公开(公告)日：1999-08-03
申请号：JP2676298
申请日：1998-01-23
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO
IPC分类号： B41L13/04 , B41L13/16 , B41L13/18 , B41L39/00
摘要： PROBLEM TO BE SOLVED: To indicate print conditions for attaining a desired print density by calculating a print density at desired pressing force and rotational speed according to a relation between the print density and the ratio of the rotational speed of plate cylinder to the pressing force of sheet against the plate cylinder thereby predicting desired print speed and pressing force. SOLUTION: Printing is conducted under print conditions indicating two or more different ratios of F (pressing force of a sheet against a plate cylinder)/f (rotational speed of a plate cylinder) and print density is measured for printed matters at corresponding positions. A plurality of print densities thus measured are processed statistically and the relation between print density and F/f is determined and then the print density is calculated at desired pressing force F and rotational speed (f) according to the relationship thus determined. Since print density and print conditions of stencil print can be predicted without requiring an excessive test print, waste of print sheet is reduced thus reducing the printing cost and waste of resource.

7. 发明专利

JPH10140069A EMULSION INK FOR MIMEOGRAPH PRINTING 失效
公开(公告)号：JPH10140069A
公开(公告)日：1998-05-26
申请号：JP32105396
申请日：1996-11-14
申请人： RISO KAGAKU CORP
发明人： ENDO TOSHIHIRO , NAKAMURA YASUO
IPC分类号： C09D7/12 , C09D11/02 , C09D11/033 , C09D11/037
摘要： PROBLEM TO BE SOLVED: To provide an emulsion ink for mimeograph printing that has a high printing concentration with reduced blotting and print-through and is excellent in abrasion resistance of the ink with reduced printing-through after printing in a water-in-oil(W/O) type emulsion ink containing a water-insoluble coloring agent in the water phase. SOLUTION: This water-in-oil (W/O) type emulsion ink contains the waterinsoluble coloring agent in the water phase and the wax component in the oil phase and/or in the water phase. The wax component is preferably adjusted in its content to 0.5-10wt.% based on the whole amount of the ink, has a penetration degree ranging from 0.1 to 50 [10 mm] at 25 deg.C and may be preliminarily dispersed in water. This emulsion ink is particularly useful in the case that the ink contains an extender pigment. The content of the extender pigment is preferably 1-50wt.% based on the whole amount of the ink.

8. 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.

9. 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.

10. 发明专利

JPH11188962A SCREEN PRINTING DENSITY CONTROL METHOD AND APPARATUS 失效
公开(公告)号：JPH11188962A
公开(公告)日：1999-07-13
申请号：JP28736898
申请日：1998-09-25
申请人： RISO KAGAKU CORP
发明人： NAKAMURA YASUO
IPC分类号： B41L13/04 , B41L13/16
摘要： PROBLEM TO BE SOLVED: To provide a screen printing density control method and apparatus capable of widely and finely changing printing density at various printing speeds. SOLUTION: In a printing density control method of screen printing wherein perforated screen printing base paper is wound around the outer peripheral surface of a plate cylinder receiving the supply of ink on its inner peripheral surface and the plate cylinder is rotated and printing paper is brought into contact with the outer peripheral surface of the stencil paper under pressure to transfer ink to the paper through perforations, the value of D is selected within a range capable of taking the value of the formula D=√ (F/f) (wherein F is the pressure contact farce of paper to the plate cylinder and f is the rotational speed of the plate cylinder) to control an increase and decrease in the transfer amt. of ink to the paper.

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