Browse Prior Art Database

INCREASING IMAGE CAPTURE THROUGHPUT IN DIGITAL SCANNERS, VIA REVERSE SCANNING

IP.com Disclosure Number: IPCOM000026193D
Original Publication Date: 1990-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 64K

Publishing Venue

Xerox Disclosure Journal

Abstract

Image throughput of a digital scanner equipped with a Universal Document Handler (UDH) is limited by scanning the document followed by retracing the scan carriage to the start of the scan position for the next scan. A one direction only scanner must retrace the moving carriage to the start-of-scan position after each scan. Although generally accomplished with an increase of carriage speed from scan speed, the electronic controls and hardware costs associated with reducing the time to an equivalent to document exchange time is high.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 94% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

INCREASING IMAGE CAPTURE Proposed Classification THROUGHPUT IN DIGITAL US. C1.355/233 SCANNERS, VIA REVERSE
SCANNING
James R. Graves
Gerald L. Coy
Kenneth J. Buck

Int. C1. G03g 15/28

Image throughput of a digital scanner equipped with a Universal Document Handler (UDH) is limited by scanning the document followed by retracing the scan carriage to the start of the scan position for the next scan. A one direction only scanner must retrace the moving carriage to the start-of-scan position after each scan. Although generally accomplished with an increase of carriage speed from scan speed, the electronic controls and hardware costs associated with reducing the time to an equivalent to document exchange time is high.

Proposed is an Image Input Terminal (IIT) implementing scanning the next document in a stack during the retrace of the scan carriage to the start-of-scan position. By implementing the reverse scan feature, the DT has reduced the time between scans to the document exchange time of the UDH by nearly half.

The reduced scanning does require the host system cf the IL" to be able to "flip" the image resulting from the scan prior to displaying or printing the image. The scanner is required to inform the host system of the direction of scanning prior to the completion of the scan.

XEROX DISCLOSURE JOURNAL Vol. 15 No. 5 September/October 1990 333

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

Page 2 of 2

334 XEROX DISCLOSURE JOURNA...