公开(公告)号：JPH0542648B2

公开(公告)日：1993-06-29

申请号：JP12557384

申请日：1984-06-19

Applicant: SONY CORP

Inventor： YOKOYAMA EIICHI ,  KISHIMOTO TAKESHI ,  HIRASHIMA SHIGEYOSHI

IPC: H04N5/74 ,  G02F1/03 ,  G02F1/05

公开(公告)号：JPH04371841A

公开(公告)日：1992-12-24

申请号：JP15051891

申请日：1991-06-21

Applicant: SONY CORP

Inventor： MIYAZAKI AKIHITO ,  BENNO HIROSHI ,  HIRASHIMA SHIGEYOSHI

IPC: B41F27/06 ,  B41F27/12

Abstract: PURPOSE:To improve an accuracy in positioning a plate to perform a high- quality multi-color printing by conducting printing using a plate cylinder formed by directly bonding a sheet-form gravure plate on a cylinder. CONSTITUTION:In a sheet-form gravure plate 5, an adhesive is applied as an adhesive layer 16 on a lower layer not used as a gravure plate surface. To wind and bond a sheet-form adhesive plate 18 on a cylinder 12 forming a plate cylinder 4, e.g. by a manual operation, a part of the adhesive layer 16 is attached on a predetermined position of the cylinder 12 to be positioned to ensure an accurate attachment. After that, the plate is directly bonded on the cylinder 12 along the outer shape of the cylinder 12 while the surface of the sheet-form gravure plate 5 is pressed so that air cannot enter between the peripheral surface of the cylinder 12 and the adhesive surface of the adhesive plate 18. Then, the plate cylinder 4 is formed. In this manner, since the plate 5 is not mounted mechanically, but is directly wound and bonded on the cylinder 12 by a manual operation, the accuracy in positioning the plate is improved, and high-quality multi-color printing is made available.

公开(公告)号：JPH04351551A

公开(公告)日：1992-12-07

申请号：JP12622691

申请日：1991-05-29

Applicant: SONY CORP

Inventor： KUWABARA SOICHI ,  HIRASHIMA SHIGEYOSHI

IPC: B41C1/05

Abstract: PURPOSE:To obtain a print with a specified density by using a gravure plate made in a short time by means of a semiconductor laser with a relatively small power. CONSTITUTION:The depth (d) of depression 15 of a plate is shallowly formed so as to obtain the plate in a short time by means of a printing plate manufacturing apparatus and this plate is placed on a plate cylinder 1A of a gravure printing apparatus and a monocolor print on a press roller 50 printed by means of this plate cylinder 1 is repeatedly printed for a plurality of times so as to obtain a specified density.

公开(公告)号：JPH0467949A

公开(公告)日：1992-03-03

申请号：JP18089390

申请日：1990-07-09

Applicant: SONY CORP

Inventor： KUWABARA SOICHI ,  HIRASHIMA SHIGEYOSHI

IPC: B41C1/04 ,  B41C1/05

Abstract: PURPOSE:To obtain a plate making device for which half-tone dot angle and half-tone dot shape can be freely changed by a method wherein the title device has an irradiation time control means which can continuously cut the time for irradiation which is made by a laser source, and an angle regulating means which can regulate the angle of irradiation made by the laser source. CONSTITUTION:When an impression 3 which becomes an intaglio is formed along the circumference of a plate sheet 2, an image input signals from an input signal source such as an image scanner, etc. is changed into PCM when it is fed to a semi-conductor laser 1, and it is 'on'/'off' controlled. By changing values of a data ROM 38, gray scale ROM 41, etc. to be equal to the modulation pulse from a pulse generator 39 to make the period of 'on' pulse 75a, to obtain a rectangular pattern 10a or square pattern 10b on the plate sheet 2, longer, the rectangular and square shaped patterns 10a, 10b with an appropriate aspect ratio are obtained. In addition, when the casting angle from the semi-conductor laser 1 is turned by a specified angle clockwise or counterclockwise from an ultra-oval pattern 10 in the horizontal direction, by an angle regulating means 47 provided in a laser block, the pattern becomes like a pattern 10c. When the period of 'on' pulse 75d is taken longer, a lozenge-shaped pattern 10d can be obtained.

公开(公告)号：JPH0383732A

公开(公告)日：1991-04-09

申请号：JP21941089

申请日：1989-08-25

Applicant: SONY CORP

Inventor： HIRASHIMA SHIGEYOSHI

IPC: B65H3/06 ,  B65H3/54

Abstract: PURPOSE:To feed a topmost paper sheet only by starting the rotary operation of a middle roller prior to the start of the rotary operation of a paper sheet feed roller, with the middle roller located behind a paper sheet feed roller or opposite to the paper sheet feed direction of the paper sheet feed roller and rotating in the paper sheet feed direction. CONSTITUTION:Before the rotary operation of a paper sheet feed roller 3 is started, the rotary operation of a middle roller 4 located behind or in the direction opposite to the roller 3 is started in the direction of the paper sheet P1 feed. As a result, the paper sheet P1 is bent upward between the middle roller 4 and the paper sheet feeder 3 and separated from the paper sheet P present under the paper sheet P1. Paper sheet feed is performed successfully one by one even paper sheets of different size, thickness, hardness, etc. are fed.

公开(公告)号：JPH0373345A

公开(公告)日：1991-03-28

申请号：JP20796089

申请日：1989-08-14

Applicant: SONY CORP

Inventor： HIRASHIMA SHIGEYOSHI ,  KUWABARA SOICHI

IPC: B41F31/02

Abstract: PURPOSE:To supply only the surface of a printing original plate efficiently with a small quantity of printing ink, and to facilitate cleaning and exchanging after printing by impregnating a printing-ink supply member with printing ink and pressure-welding the printing-ink supply member to the printing original plate or impregnating printing ink from the base end side of the printing-ink supply member and applying ink to the printing original plate through a sliding and contacting section on the nose side. CONSTITUTION:A printing-ink supply member 5 is composed of a water-absorbing material, and pressure-welded and supported to a printing original plate 2. When a plate cylinder body 1b is turned, printing ink 7 impregnated to the printing-ink supply member 5 is applied. In another example, a printing ink container 10 is formed in a box body shape, the top face side of which is opened, and printing ink 11 is stored. The base end side 9b is dipped into printing ink 11 and a printing original-plate sliding and contacting section 9a on the nose side is pressure-welded to the printing original plate 2 in a water-absorbing printing original-plate sliding and contacting section 9a. Printing ink 7, 11 is applied only onto the surface of the printing original plate 2, and is not applied to both end surface sections of the plate cylinder body 1b. Printing ink 11 on the protruding sections of the printing original plate 2 is scraped off by doctor blades 8, 12, and reused efficiently.

公开(公告)号：JPH0272950A

公开(公告)日：1990-03-13

申请号：JP22491788

申请日：1988-09-08

Applicant: SONY CORP

Inventor： MAJIMA OSAMU ,  TOMONO KAORU ,  HIRASHIMA SHIGEYOSHI

IPC: B41C1/05 ,  B41M5/26

Abstract: PURPOSE:To obtain a plate cylinder having a high grade, being proper to the printing of intermediate number and being capable of being utilized even any times by forming a meshy recessed section having uniform depth to a printing plate, filling the recessed section with heat-fusing fillers and sticking fillers corresponding to a picture onto a sheet by a heat-generating member while holding the sheet. CONSTITUTION:The whole printing plate is coated with heat-fusing fillers 16. Wax having the comparatively narrow range of the distribution of the melting point and hardness on curing and being adjusted so that viscosity thereof is lowered on melting is used as the fillers 16. The surface of the fillers is scraped off by an edge knife, and a plain plate cylinder 6 having a smooth surface is acquired. Molten fillers are easy to absorb or draw near to the printing plate, and a sheet 17 composed of absorbent paper, etc., having excellent heat conduction is placed. The sheet is manufactured by coating a polyimide resin with porous substance and particles such as aluminum oxide, and a heat-generating member 18 is put on the sheet. The heating element of the heat-generating member 18 is controlled in accordance with the variable density of a picture, and fillers 16 in a quantity corresponding to a calorific value from the heating element is melted, and attached onto the sheet 17 and removed, thus obtaining the plate cylinder 6 having a gradation.

公开(公告)号：JPH0270435A

公开(公告)日：1990-03-09

申请号：JP22369588

申请日：1988-09-07

Applicant: SONY CORP

Inventor： MAJIMA OSAMU ,  KOBAYASHI KAZUO ,  HIRASHIMA SHIGEYOSHI ,  KUWABARA SOICHI

IPC: B41C1/05 ,  B41M5/26

Abstract: PURPOSE:To obtain a high quality plate cylinder reusable and suitable for printing a modest number of sheets by so providing a thermally-melting type filler in a cell formed on a plate surface that the volume of said filler is changed in correspondence to the density of an image by a laser. CONSTITUTION:A uniform cell 15 is etched with the depth (t) in a network on the plate surface of a plate cylinder 6, so that the whole plate surface is in a solid state at the printing time. Then, a filler 16 of thermally-melting type is applied all over the plate surface. The filler 16 is such that is obtained by allowing carbons or the like to be contained in a wax which has a relatively narrow distribution of melting points, showing some hardness when it is cured and reduced viscosity when it is melted. The filler 16 is scattered by radiating a laser 18 into the cells. In this case,k if the laser is modulated or the radiating time of the laser is changed for each cell, the capacity of a recess in the cell where the filler is dispersed or sublimated can be adjusted. Therefore, the recess 19 having the volume corresponding to the gradation can be formed.