Xerox Corporation

Dean Thomas

Deborah M Kretschmann

William D Milillo

Robert Brutovski

Robert Arnold Gross

Charles W Spehrley, Jr

Ming Yang

Michael A Malachowski

Nicholas M Lamendola

Robert R Schaffer

John D Gramlich

Michael James Diehl

John A Shannon

Thomas Crofton Hatch

Glenn M Herbert

Thomas P Lambert

Theodore J Kellogg

Janice S Brooks

Michelle Anne Remus

James T Kayko

Gregory N Carpenter

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

A substrate feeding system, and printers that use such feeding systems, that includes a feed roll and a retard roll that form a nip, a nudger roll for advancing a substrate from a substrate stack toward the nip, and an entrance guide between the nudger roll and the nip. The entrance guide has a contact surface that forms an angle of more than 100.degree. with the direction of motion of the substrate. The entrance guide further including a top section over which the substrate moves as it advances into the nip. The entrance guide is beneficially pivotally mounted such that when a retard roll is removed the entrance guide pivots out of the way, and such that when a retard roll is in place the entrance guide moves into position.

Entrance guide for friction/retard feeding systems

An apparatus which transfers a developed image from a photoconductive member to a sheet. A sheet baffle guides an advancing sheet to the photoconductive member at the transfer station. The sheet baffle has an elongated axis extending in a transverse direction to the planer surface of the photoconductive member. A sensing unit, located prior to the transfer station, generates a signal indicative of the sheet basis weight. A regulator, responsive to the signal from the sensing unit, adjusts the position of the sheet baffle to position the elongated axis thereof at a selected angle relative to the planer surface of the photoconductive member. This angle is greater for a lightweight sheet than for a heavyweight sheet.

Transfer apparatus

A substrate transport assembly having an air mover that moves air through an air housing such that a substrate is biased against a drive member. The substrate assembly further includes an air plenum that receives moving air and directs that air along a predetermined path. The air plenum expands when air is moving but is otherwise collapsed.

Collapsible air plenum

An apparatus for advancing a sheet from a moving imaging member having an unfused image after transfer of the image to the sheet. After the image is transferred to the sheet, the sheet is advanced by a transport to a fuser. The transport has low impedance, high air flow to draw the sheet toward the transport for acquisition. As the sheet is moved across the transport, an increased air flow impedance causes a low vacuum pressure in the transport to provide a low drive force that minimizes quality and motion disturbances on the sheet. The low drive force exerted on the sleet is lower than a holding force of the sheet to the moving imaging member thus causing the sheet to slide on the transport.

High air flow low pressure prefuser transport

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Webster, NY, United States of America

Dean Thomas