Xerox Corporation

Gerald A Gray, Jr

Edward L Steiner

Stephen P Wilczek

Kenneth W Laskowski

Phillip J Batchelor

John L Webb

Henry E Mannella

A system for copying large documents on a large document copier having a large document sheet feeder and a large copy sheet or web feeder with improved convenience and efficiency by inserting the leading edge of the large document into the document feeder from the front of the copier, automatically initially rapidly feeding the large document away from the front of the copier with the document feeder, pausing the feeding of the large document in a position wherein a trailing portion is retained in the document feeder but a substantial portion of the document is at the rear of the copier, so that the front of the large document copier is unobstructed, then inserting a copy sheet or web into the copier from the front thereof for copying, and in response to this and copier activation, first automatically rapidly feeding the large document back in a reverse direction with the large document feeder without copying, up to a position where a leading edge portion of the document is retained by the document feeder, and then, promptly thereafter, automatically again reversing the direction of feeding the document and moving the document at a copying speed synchronized with movement of the copy sheet or web towards the rear of the copier for copying the large document onto the copy sheet or web.

Large document copying system

A copying system with a large document feeder for making large copy sheet (or web) media copies by moving the document past an optical scanning slit at a preset speed proportional to the speed of the imaging surface, and transferring the image onto a selected large copy media, with an easily correctable image size. The disclosed system provides for accurately controlling and adjusting the size of the copy image relative to the document image, by controlled adjustment of the magnification or reduction without requiring anamorphic or other lens changes. It is accomplished by making a test copy of the document onto the selected large copy media in the copier; measuring the dimensional change in the image on that copy media relative to the document image, in the direction of movement; deriving a simple numerical correction factor corresponding to the measured dimensional change; entering the correction factor into a variable speed control for the large document feeder to reset the speed of movement of the document past the optical scanning slit by an amount proportional to the correction factor, to provide a corresponding image reduction or magnification dimensional change of the copy image; and making subsequent copies on that media with the document moving past the optical scanning slit at the reset speed. The correction factor derivation comprises a simple calculation also including the approximate overall length in the movement direction of the test copy media or the document, and may be derived with a simple numerical table. The system can provide an exact size copy image of the document image by compensating for varying dimensional changes of different copy media in the fuser, etc., or a selectable image size change. Different selectable preset nominal (initial, but resettable) correction factors for various copy media are desirably provided.

Large media proportional copying system

An electrostatographic type copying or reproduction machine incorporating a programmable controller to operate the various machine components in an integrated manner to produce copies is disclosed. The controller carries a master program bearing machine operating parameters from which an operating program for the specific copy run desired is formed and used to operate the machine components to produce the copies programmed. A multiple prioritized interrupt system interrupts the background routine in use to carry out the next scheduled foreground routine as appropriate. Since the interrupt interval is limited, overlong foreground routines, if called by the copy run programmed, are spooled by placing a portion or all of the overlong routine in background.

Control system for electrostatic type copy reproducing machines

A reproduction machine for making either single sided or duplex copies, and incorporating automatic document handler and sorter for handling original documents being copied and copies made. To enable copy quality to be checked, either when the machine is stopped or in the midst of a copy run, a sample copy is provided for. Where the sample copy is selected during a copy run, an accommodation in copy billing rate is made.

Sample copy system for xerographic reproduction machine

An operator console for a reproduction machine, with the console including a fixed number of input selection devices, e.g. pushbuttons, for initiating machine activity. The activation of the machine components is preferably controlled by a digital computer being instructed by a plurality of operating programs. The selection of the same console input device will initiate a different machine activity depending on what program is currently instructing the machine.

Operator console for a reproduction machine

A reproduction machine for making two-sided or duplex copies. When there is an odd number of simplex original documents to be copied in the duplex mode, the last copy sheet bears an image only on one side. The present invention provides a control system for operating various machine components in response to such an occurrence in order to optimize the throughput capability of the machine.

Growing community of inventors

Fairport, NY, United States of America

Gerald A Gray, Jr