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CONSTANT VELOCITY COPY SHEET TRANSPORT FOR INK JET PRINTING

IP.com Disclosure Number: IPCOM000024951D
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

A constant velocity transport 50 (CVT) is disclosed for use with a marking apparatus such as an ink jet printing system 21. The transport 50 utilizes a vacuum hold-down plenum 72 and transport belts to bring sheets to a printing zone 76 of the printing system and a vacuum plenum 73 to carry sheets away from the zone. The transport 50 also includes a sheet-attracting vacuum arrangement comprising a multiple-grooved guide plate 77, vacuum ports for the grooves, and a vacuum plenum 93 between the two plenums for drawing the sheet to the guide surface 77 as the sheet moves through the printing zone. A transverse slot 78 formed in the

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Proposed Classification
U.S. Cl. 271/194 Int. CI. B65h 29/24

A constant velocity transport 50 (CVT) is disclosed for use with a marking apparatus such as an ink jet printing system 21. The transport 50 utilizes a vacuum hold-down plenum 72 and transport belts to bring sheets to a printing zone 76 of the printing system and a vacuum plenum 73 to carry sheets away from the zone. The transport 50 also includes a sheet-attracting vacuum arrangement comprising a multiple-grooved guide plate 77, vacuum ports for the grooves, and a vacuum plenum 93 between the two plenums for drawing the sheet to the guide surface 77 as the sheet moves through the printing zone. A transverse slot 78 formed in the

Volume 8 Number 1 January/February 1983 19

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CONSTANT VELOCITY COPY SHEET TRANSPORT FOR INK JET PRINTING (Cont'd)

plate 77 allows ink droplets to be applied to the sheet now bridging the slot and moving transversely thereto. The sheet is returned to the transport by the plenum 73 at a point adjacent the idler roller 63. The sheet-attracting action is effective just at the point marking is effective upon the sheet thereby insuring the precise location of the sheet for printing.

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   XEROX DISCLOSURE JOURNAL Volume 8 Number 1 January/February 1983

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