Iwatsu Electric Company Ltd.

Masahiro Kogiso

Tamio Iwamoto

Yousuke Igarashi

Minehiro Sakata

Satoshi Hisabayoshi

Hatsuo Oda

Yoshio Horiguchi

In a copying machine of the type comprising an image projecting lens movable in a direction of an optical axis thereof for varying a magnifying power, a reflecting mirror interlocked with the lens for effecting focusing, and two groups of light sources for illuminating a manuscript, there is provided an exposure control system comprising variable resistors driven by the projecting lens, oscillators for generating pulse signals of frequencies varying in accordance with resistance variations of the variable resistors and with a variation in a source voltage, counters counting the number of the pulse signals in accordance with an exposure index, and switch means for lighting the light sources during intervals determined by an exposure index.

Exposure control systems for use in copying machine

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.

Apparatus for making plates for printing

Growing community of inventors

Kokubunji, Japan

Masahiro Kogiso