Xerox Corporation

Deborah M Kretschmann

Dean Thomas

William D Milillo

Robert Brutovski

Ming Yang

Nicholas M Lamendola

John A Shannon

Thomas Crofton Hatch

Glenn M Herbert

Theodore J Kellogg

A printing apparatus places multiple images on a sheet at least once on one side, and at least once on an opposite side. After the first printing, the sheet is inverted by an inverter and sent to a duplex path Sensors both in a feed path and the duplex path detect the side edge of the sheet to register the position of the sheet to an image rendering device A user has the option to input preferences at a user interface the preferences including running average and registration options. More specifically, the user has the option to choose a number of sheets used to calculate a running average for registration of both the simplexed and duplexed sheets The user also has the option to select between image to image registration, and image to page registration for duplex printing.

Mode switch and adjustable averaging scheme for tandem top edge electronic registration

The present invention generally relates to a printing apparatus including a marking device, the marking device being capable of placing an image on a sheet fed therein, and outputting the sheet; a feed path, by which sheets are fed from a sheet supply to the marking device; a duplex path, by which sheets output from the marking device are re-fed to the marking device; a first sensor, outputting a first position signal relating to a location of a side edge as each sheet passes through the feed path; a second sensor, outputting a second position signal relating to a location of a side edge as each sheet passes through the duplex path; and an image placement controller associated with the marking device, the image placement controller retaining first position signals for a plurality of sheets passing through the feed path and second position signals for a plurality of sheets passing through the duplex path, and calculating new average paper positions for each sheet in response to at least one of the first position signals and the second position signals.

Flyer determination and elimination for side edge electronic registration

A printing apparatus places multiple images on a sheet, either by re-feeding the sheet through a duplex path back to a marking device, or by feeding the sheet to successive marking devices. An edge position detector upstream of the marking device determines the location of the sheet so that an image may be precisely placed on the sheet. The system ensures that images on both sides of a sheet are in registration with each other.

Registration system for a digital printer which prints multiple images on a sheet

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Penfield, NY, United States of America

Deborah M Kretschmann