Browse Prior Art Database

SHEET PRECURLER FOR GRIPPERLESS COLOR REGISTRATION

IP.com Disclosure Number: IPCOM000026572D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 105K

Publishing Venue

Xerox Disclosure Journal

Abstract

For color copiers, "multi-pass transfer" means that each sheet is routed a number of times through the same xerographic transfer zone. A different color-separation image is put on the sheet with each pass. The sheets are firmly held by a roll or loop recirculating mechanism to maintain registration between transfer passes. Up to four color transfers are done (cyan, magenta yellow and black), involving a like number of passes for each sheet. After all of the colors have been received, the sheet goes through a fuser station to fix the combined image to the sheet.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

Proposed Classification
U.S. C1.355/272 Int.
C1. G03g 15/14

SHEET PRECURLER FOR GRIPPERLESS COLOR REGISTRATION
David M. Attridge
Jacob N. Kluger
Lisbeth
S. Quesnel
Lam F. Wong

Photoreceptor \

Vacuum

Tack Coro tron (if needed)

FIG. I

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992 353

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Page 2 of 4

SHEET PRECURLER FOR GRIPPERLESS COLOR REGISTRATION(Cont'd)

flat Sheet Subjected to Precurled Sheet Electrostatic Tack force Subjected to

Electrostatic Tack force

FIG. 2 FIG. 3

354 XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedOctober 1992

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Page 3 of 4

SHEET PRECURLER FOR GRIPPERLESS COLOR

RE GISTRATION(Cont'd)

For color copiers, "multi-pass transfer" means that each sheet is routed a number of times through the same xerographic transfer zone. A different color-separation image is put on the sheet with each pass. The sheets are firmly held by a roll or loop recirculating mechanism to maintain registration between transfer passes. Up to four color transfers are done (cyan, magenta yellow and black), involving a like number of passes for each sheet. After all of the colors have been received, the sheet goes through a fuser station to fix the combined image to the sheet.

The critical problem to overcome is edge deletions caused by grippers which are needed, for transfer "roll" architecture, to press the lead (and maybe trail)...