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TIJ IMAGING DRUM WITH BLOWOFF

IP.com Disclosure Number: IPCOM000027238D
Original Publication Date: 1995-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 61K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an apparatus and method for a TIJ imaging drum with blowoff for use in, for example, a process color thermal ink jet printing (TIJ) device. The apparatus comprises a vacuum drum with a chamber residing beneath a receiver sheet lead edge which communicates either pressure or vacuum from an adjacent blower housing through a connecting control valve. At predetermined intervals in an imaging cycle, the lead edge of the sheet is blown off the drum by pressure means to assist in stripping. The drum may be optionally heated by internal heating means to dry inked paper receiver sheets.

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XEROX DISCLOSURE JOURNAL

TIJ IMAGING DRUM WITH BLOWOFF Thomas Acquaviva

Proposed Classification

U.S. C1.346/140 Int. C1. Gold 15/18

Disclosed is an apparatus and method for a TIJ imaging drum with blowoff for use in, for example, a process color thermal ink jet printing (TIJ) device. The apparatus comprises a vacuum drum with a chamber residing beneath a receiver sheet lead edge which communicates either pressure or vacuum from an adjacent blower housing through a connecting control valve. At predetermined intervals in an imaging cycle, the lead edge of the sheet is blown off the drum by pressure means to assist in stripping. The drum may be optionally heated by internal heating means to dry inked paper receiver sheets.

The vacuum drum contains two chambers; one is positioned under the lead edge and the other is vented to the rest of the drum perimeter. While imaging, both chambers are connected to the vacuum side of an air system. After the final imaging and drying pass, the control valve changes position and applies pressure to the lead edge of the sheet. This pushes the lead edge off the drum to direct it towards another nip which exits the receiver sheet from the machine .

An advantage of this approach is that it does not rely on delicate stripper fingers which can break or damage the lead edge of the receiver sheet.

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XEROX DISCLOSURE JOURNAL - Vol. 20 No. 6 Novernber/Decernber 1995 493

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