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Browse Prior Art Database

AUTOMATED IMAGE BAR ALIGNMENT IN A SINGLE-PASS COLOR IOT

IP.com Disclosure Number: IPCOM000026342D
Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 82K

Publishing Venue

Xerox Disclosure Journal

Abstract

An automated image bar alignment system and method for use in a single-pass color image output terminal (IOT) is disclosed. In single pass xerographic or ionographic color printers, maintaining color registration often requires that stored image bars be appropriately aligned with one another and image data be strobed at proper time intervals. Manual alignment of misaligned image bars can be a slow, error prone and costly proposition.

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XEROX DISCLOSURE JOURNAL

AUTOMATED IMAGE BAR Proposed Classification ALIGNMENT IN A SINGLE-PASS
COLOR IOT
Harold M. Anderson
Vittorio Castelli
Gerald A. Domato
Joannes deJohn

U.S. C1. 355/235 Int. C1. G03g 15/28

An automated image bar alignment system and method for use in a single- pass color image output terminal (IOT) is disclosed. In single pass xerographic or ionographic color printers, maintaining color registration often requires that stored image bars be appropriately aligned with one another and image data be strobed at proper time intervals. Manual alignment of misaligned image bars can be a slow, error prone and costly proposition.

The automated image bar alignment system is comprised of a series of image bars that are mounted on a movable assembly that may be translated laterally and rotated pivotally from a reference side edge. The translation and rotation may be achieved with stepper motors cooperating with worm gears that move an image bar a known distance for each step of the motor. The motor driven system is opposed by a spring force to prevent backlash.

Alternatively, the system may use an electrically driven clamp means that requires no power except during alignment operations. A coil in the clamp is energized to disengage it from the image bar array. An onboard input scanner is similarly equipped with one of the above-mentioned translation mechanisms such that the scanner moves across the width of a printed input image under coordinated contro...