Am International Incorporated

Addressograph Multigraph Corporation

Walter A Hudson

Terry G Seelenbinder

Eugene P Oddo

Richard W Jackson

John J Van Acker

A photocopy machine is provided comprising an exposure roller for exposing a sensitized copy sheet to an original document to be copied and an applicator roller for applying a developer to the exposed copy sheet to produce a visible image. A drive means is provided for selectively operating the rollers in a first or a second mode of operation. In the first mode of operation, the rollers are positively driven in one direction for making copies and in the second mode of operation the rollers are free wheeling in either direction to facilitate removal of a sheet jam and servicing of the machine.

Photocopy machines

In a developing apparatus for developing exposed copy sheets with liquid developer, which apparatus employs an applicator roll for the developer liquid and metering and pressure blades in contact with the applicator roll for controlling the development process, there is provided a wick for applying the developer liquid to the roll. Means is provided for moving the wick into and out of contact with the surface of the applicator roll so that the wick may be withdrawn whenever the apparatus is stopped in order to allow uniform drying of the roll surface to forestall the possibility of non uniform development treatment which otherwise might occur when the apparatus is next used. The apparatus also comprises a special support for the bar which carries the metering blade, the bar being rockably carried in support plates which are pivoted on the frame and adjustable while the apparatus is operating to adjust the attitude of the metering blade relative to the applicator roll surface and thereby control the amount of developer liquid which the roll surface is applying to the copy sheets.

Developer apparatus

A developer apparatus is provided for developing exposed diazotype copy sheets comprising an applicator roller, means for supplying liquid developer to the applicator roller, a metering blade for wiping excessive liquid from the applicator roller and a pressure blade for pressing a copy sheet against the surface of the applicator roller to transfer liquid from the applicator roller to the copy sheet to develop an image thereon. The metering and pressure blades are arranged for sliding movement between an inoperative position ineffective to develop the copy sheet and an operative position in pressure engagement with the applicator roller for developing the copy sheet. Cam and linkage control means is provided for sequentially moving the blades between the inoperative and operative positions under control of a manually operable actuating means.

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Fox River Grove, IL, United States of America

Walter A Hudson