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CYLINDRICAL INK JET PRINTING ZONE

IP.com Disclosure Number: IPCOM000027478D
Original Publication Date: 1997-Apr-30
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

A cylindrical ink jet printing zone provides for improved paper handling reliability of curled paper through the print zone as well as the option of bleed edge printing up to the lead and trail edges of the pages being printed.

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XEROX DISCLOSURE JOURNAL

CYLINDRICAL INK JET PRINTING ZONE

Proposed Morton Silverberg U. S. C1.347/087 Classification

Int. C1. B41j 02/175

A cylindrical ink jet printing zone provides for improved paper handling reliability of curled paper through the print zone as well as the option of bleed edge printing up to the lead and trail edges of the pages being printed.

Currently, ink jet printers have lead and trail image deletions due to the problems of controlling the spacing of the paper from the ink jet head unless both the paper is in the grip of drive members at both the inlet and outlet of the print zone. The lead edge deletion can be minimized for flat paper by the use of frngers which reach under the head path almost to the print region. However, for upcurled papers this approach, or one which tries to angularly bias the paper against a support platen, is not adequate. Additionally, especially when the width of the ink jet print swath is increased to increase the print speed, the lead edge is not reliably guided to the drive nips on the outlet side of the print zone.

A solution to these constraints is to cause the paper to be formed into a semi-cylindrical shape as it enters the print zone. The axis of the cylinder is preferably on the side of the paper away from the ink jet head. This maximizes the ability to overcome paper curl toward the ink jet head.

A semi-cylindrical platen support on the side of the paper away from the ink jet heads is also desired and...