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1. (WO1991008522) ELECTROSTATIC COPYING METHOD
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/008522 International Application No.: PCT/JP1990/001551
Publication Date: 13.06.1991 International Filing Date: 29.11.1990
IPC:
G03G 5/02 (2006.01) ,G03G 15/18 (2006.01) ,G03G 16/00 (2006.01)
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
5
Recording-members for original recording by exposure e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
02
Charge-receiving layers
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15
Apparatus for electrographic processes using a charge pattern
14
for transferring a pattern to a second base
18
of a charge pattern
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
16
Electrographic processes using deformation of thermoplastic layers; Apparatus therefor
Applicants:
DAI NIPPON PRINTING CO., LTD. [JP/JP]; 1-1, Ichigaya-Kagacho 1-chome Shinjuku-ku Tokyo 162, JP (AllExceptUS)
OKABE, Masato [JP/JP]; JP (UsOnly)
IIJIMA, Masayuki [JP/JP]; JP (UsOnly)
AONO, Takashi [JP/JP]; JP (UsOnly)
Inventors:
OKABE, Masato; JP
IIJIMA, Masayuki; JP
AONO, Takashi; JP
Agent:
HIRUKAWA, Masanobu ; Azusa Patent Office Sairakudo Bldg. 7th Floor 18-11, Ueno 1-chome Taito-ku Tokyo 110, JP
Priority Data:
1/31149129.11.1989JP
1/31149229.11.1989JP
Title (EN) ELECTROSTATIC COPYING METHOD
(FR) PROCEDE DE DUPLICATION ELECTROSTATIQUE
Abstract:
(EN) A master charge retaining medium (2) carrying electrostatic information and a charge retaining medium (3) for copying are arranged in such a manner as to face each other (as shown in Fig. 2(b)). A voltage is applied between the electrodes of both charge retaining media to cause discharge and form a reverse image of electrostatic information onto the charge retaining medium for copying. The capacitance of the master charge retaining medium may be greater sufficiently than that of the charge retaining medium for copying so that the master medium can be copied any number of times with enough contrast maintained. In Fig. 7, a master charge retaining medium having an insulation layer having a high softening point and a charge retaining medium for copying having a thermoplastic resin layer (4a) are arranged in such a manner as to face each other. The thermoplastic resin layer is charged corresponding to the electrostatic image of the master charge retaining medium (2), and it is heated and softened to form corrugation. In this manner, the transfer and development of an image can be repeated any number of times without causing the leak of the static charge.
(FR) Un support-maître de maintien (2) des charges portant des informations électrostatiques et un support de maintien (3) des charges destiné à la duplication, sont agencés de sorte qu'ils se trouvent face à face, comme la figure 2(b) le représente. On applique une tension entre les électrodes des deux supports de maintien des charges afin de provoquer une décharge et de former une image inverse des informations électrostatiques sur le support de maintien des charges afin que lesdites informations soient dupliquées. La capacitance du support-maître de maintien des charges peut être plus grande que celle du support de maintien des charges à un degré suffisant pour que, lors de la duplication, le support-maître puisse être dupliqué autant de fois que l'on veut sans perdre de contraste. Dans la figure 7, un support-maître de maintien des charges portant une couche isolante qui présente un point de ramollissement élevé, et un support de maintien des charges destiné à la duplication et possédant une couche de résine thermoplastique (4a), sont agencés de sorte qu'ils se trouvent face à face. La couche de résine thermoplastique est chargée en fonction de l'image électrostatique du support-maître de maintien des charges (2), et elle subit un chauffage et un ramollissement afin que des ondulations soient formées sur elle. On peut ainsi répéter le transfert et le développement d'une image autant de fois que l'on veut sans provoquer une perte des charges statiques.
Designated States: US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0455828US5376955