Iwatsu Electric Company Ltd.

Tamio Iwamoto

Masahiro Hayashi

Minehiro Sakata

Nobuyoshi Hatori

Seiji Matsuo

Toshio Koike

Satoshi Okabe

Yousuke Igarashi

Masanori Kai

Takeo Kadoi

Masahiro Kogiso

Akira Kobashikawa

Hatsuo Oda

Seiichi Honma

A fixing device for a wet type master sheet making apparatus for making a master sheet has a heated panel for fixing and drying a developed image on the master sheet while the master sheet moves on the panel, and a cleaning web placed between a surface of the panel and the master sheet to absorb extra developing liquid on the master sheet while the master sheet moves on the panel. The fixing device has web winding means for winding the web to move the web along the surface of the panel, and actuating means for selectively actuating the winding means by one of manual and electrical operations. Therefore, the user can easily and quickly tension the cleaning web to make the cleaning web tightly contact the surface of the panel by manually actuating the winding means when the cleaning web is replaced.

Fixing device for wet type master sheet making apparatus for making

A fixing apparatus for a wet-type plate making machine, which includes panel heaters 13 and 14 for fixation and drying of an electrostatic latent image an a front surface of a master X after development with developing solution and a cleaning web 20 that is laid over top surfaces of the aforenamed panel heaters 13 and 14 and that will be wound around a web take-up bobbin 20B that is disposed at an end of the same panel heater 14, and which also includes a web take-up shaft 27 that has a bobbin attachment and 27a for supporting of the aforenamed web take-up bobbin 20B and a manual operation end 27b that can be turned freely with finger tips, a first one way clutch 31 that is fitted on the take-up shaft 27 and that transmits revolving movements of a clutch sleeve 31a that is reciprocally revolved by a solenoid 29 at the apparatus securing part but transmits only those in one direction to the aforenamed take-up shaft 27, and a second one way clutch 36 that in fitted on the take-up shaft 27 and that allows forced revolving movements of the aforenamed take-up shaft 27 in a taking-up direction by the aforenamed manual operation end 27b.

Fixing apparatus for a wet-type plate making machine

A printing-plate making apparatus is constructed such that a mode selecting switch adapted to change a master supplying process depending on properties of a master X is disposed on a housing 1 of the printing-plate making apparatus and various conditions, e.g., a master supplying process, locking member 4 for a master supplying roller 3, a temperature preset for a panel heater 33 and a compressing force given by press rollers 35a and 35b are automatically changed to optimal conditions corresponding to masters selected by the mode selecting switch. The printing-plate making apparatus is provided with a master heating switch on the housing 1 of the printing-plate making apparatus and when the master heating switch is actuated, applying of a certain voltage to at least a charger is stopped so that the panel heater 33 arranged at a fixing step is kept in the heated state so as to serve as a master heating unit.

Printing plate making apparatus for two different kinds of masters

An electrophotographic plate-making machine including a light source and a movable copy holder forming a scanning exposure system for focusing a light at a focus region. A first electric motor is connected to the copy holder, and a sensitive paper is conveyed by a plurality of conveying rollers. Two of the conveying rollers are arranged at the focus region in series with the remaining conveying rollers. A second electric motor is connected to the conveying rollers and a third electric motor is connected to the focus region rollers. Accordingly, the first, second and third electric drive motors, respectively, can move the copy holder, the conveying rollers and the focus region rollers independently of each other, so that a first scanning exposure can be carried out on one portion of a sensitive paper and a second scanning exposure can be carried out on the remaining portion of the sensitive paper.

Electrophotographic plate-making machine with independent motors for

An exposure device for a platemaking apparatus has: a plate material feed unit consisting of a suction mechanism for feeding and stopping a plate material on an exposure unit, conveyor belts, drive motors and the like; two shielding curtains respectively rolled at two ends of the exposure unit and selectively extended on the exposure unit; shielding curtain drive units for independently driving the two shielding curtains; a setting unit for setting exposure conditions of a document image to be formed on the plate material; and a control unit for controlling the motors of the plate material feed unit and the shielding curtain drive units in a given relationship in response to the conditions set in the setting means, wherein an identical document image is formed on different positions of a single plate material a plurality of times.

Exposure device for platemaking apparatus

An electro-fax type of apparatus for making a plate for offset printing, wherein a system for processing a master paper to be made into the plate is disposed on a horizontal plane so that the master paper is forwarded in the horizontal direction and an optical system is disposed on a plane traversing the forwarding direction of the master paper. The apparatus can be disassembled into several sections which are transportable as individual units, and also can be easily reassembled without deterioration of the accurately adjusted functions of the apparatus.

Growing community of inventors

Tokyo, Japan

Tamio Iwamoto