Xerox Corporation

Douglas A Ross

David Birnbaum

Steven M Palermo

In a simplex or duplex copier with plural different document inputs, including at least one input normally used for copying single documents and another normally used for copying plural documents, a system is provided for automatically selecting duplex copying whenever appropriate, to save copy sheets, including a controller programmed to automatically select between simplex or duplex copying and to direct the copy sheets into a duplex copying path when duplex copying is selected, and respective document input sensors connected to provide control signals to the controller upon sensing a document at a respective document input, the controller automatically selecting duplex copying unless there is a signal from a document input sensor at a document input normally used for copying single documents, such as a semi-automatic document input or a sensor sensing the lifting of the document handler, or, even though the document input normally used for copying plural documents is the input tray of an automatic recirculating document handler unit, a downstream sensor detects that only a single document was fed from that tray to be copied.

Automatic simplex and duplex copying system

The present invention is an apparatus and method adaptable for use in a printing system, to measure the mass of toner developed on an electrostatic latent image produced therein. The printing system employs an electrostatic process to produce a printed sheet in response to a plurality of image intensity signals. The toner mass measuring apparatus sums a plurality of individual toner mass signals, generated as a function of the image intensity signals, to approximate the toner mass used to develop the electrostatic latent image.

Growing community of inventors

Rochester, NY, United States of America

Douglas A Ross