Browse Prior Art Database

COLOR SWITCHING IN A HIGH SPEED PRINTER

IP.com Disclosure Number: IPCOM000025787D
Original Publication Date: 1988-Feb-29
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 50K

Publishing Venue

Xerox Disclosure Journal

Abstract

In order to switch colors in a high speed printing machine, one developer unit must be disengaged and the other developer unit engaged in a short period of time. Unless the timing of the printing machine is changed, the switching of developer units must be done in the time of passage between successive electrostatic latent images recorded on the photoconductive surface, i.e. the time required for the passage of the interdocument space. If color switching cannot be achieved in the time required for the passage of the interdocument space,the needed delay is achieved by skipping one frame. Thus, the time available for shifting developer units is lengthened by skipping one or more frames, as necessary. Incoming data is shunted onto a buffer during the delay while the ROS continues to operate, erasing the skipped frames. Sheet feeding is interrupted.

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XEROX DISCLOSURE JOURNAL

COLOR SWITCHING IN A HIGH SPEED PRINTER
Jan Bares

Proposed Classification
U.S. c1.35514 Int. C1. G03g 15/01

In order to switch colors in a high speed printing machine, one developer unit must be disengaged and the other developer unit engaged in a short period of time. Unless the timing of the printing machine is changed, the switching of developer units must be done in the time of passage between successive electrostatic latent images recorded on the photoconductive surface, i.e. the time required for the passage of the interdocument space. If color switching cannot be achieved in the time required for the passage of the interdocument space,the needed delay is achieved by skipping one frame. Thus, the time available for shifting developer units is lengthened by skipping one or more frames, as necessary. Incoming data is shunted onto a buffer during the delay while the ROS continues to operate, erasing the skipped frames. Sheet feeding is interrupted.

21 Volume 13 Number 1 January/February 1983

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22 XEROX DISCLOSURE JOURNAL

Volume 13 Number 1 January/February 1988

[This page contains 1 picture or other non-text object]