Xerox Corporation

David N Redden

Ali Rafic Dergham

Thomas C Hollar

Karl B Ayash

John H Steele

James D Rees

Craig A Smith

David K Shogren

Edwin Zucker

Paul H Stiebitz

A method and apparatus are provided to control the atmosphere inside of a xerographic control module of an image forming device so that a dew point condition is not reached. The parameters of the atmosphere within the xerographic chamber which are controlled include pressure, temperature and humidity.

Method and apparatus for controlling humidity in a copying device

In a full-frame, copying system, translucent registration guides along the edges of a platen area provide an operator with an indication of which portion of a document overlying the platen will be copied onto selected copy paper at the particular magnification ratio selected. Illumination sources located on the image side of a projection lens create line images which are projected through the lens to illuminate appropriate registration guides corresponding with the particular magnification ratio.

Optical system for providing visual aid for proper magnification

A document reproduction machine having a multiple range of magnifications employs a scanning optical system which is controlled as to scanning speed and distance of travel by the selected magnification. In the higher reduction copying ranges the speed of the scanning optical system is automatically increased in proportion to the selected magnification reduction, but the increase in scanning distance is limited to the platen size. Multiple cams are employed for each range of magnification, and means are provided to change the scanning drive means between the multiple cams.

Multiple range variable magnification reproduction machine

Growing community of inventors

Penfield, NY, United States of America

David N Redden