Illllllllllllllllllllllllllllllllllllllllllllllll
US006856423B2
(12) United States Patent (io) Patent No.: US 6,856,423 B2
Anderson et al. (45) Date of Patent: Feb. 15,2005
(54) DUAL SCANNER SYSTEM AND METHOD
(75) Inventors: Bradley J. Anderson, Boise, ID (US);
William I. Herrmann, Eagle, ID (US)
(73) Assignee: Hewlett-Packard Development
Company, L.P., Houston, TX (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 406 days.
(21) Appl. No.: 09/938,981
(22) Filed: Aug. 24, 2001
(65) Prior Publication Data
US 2003/0038988 Al Feb. 27, 2003
(51) Int. CI.7 G06K 15/00
(52) U.S. CI 358/1.18; 358/1.3; 358/1.12;
358/1.16; 358/462; 382/312
(58) Field of Search 358/526, 530,
358/403, 406, 462, 448, 474, 505, 506,
513, 514, 482, 483, 486, 443, 496, 497,
498; 382/312, 314, 315, 318, 319, 321
(56) References Cited
U.S. PATENT DOCUMENTS
4,672,186 A 6/1987 Van Tyne 235/420
Primary Examiner—-Jerome Grant, II
(57) ABSTRACT
A system and method for scanning a medium and reproduc-
ing an image of the medium includes a first scanner adapted
to scan a first side of the medium and a second scanner
adapted to scan a second side of the medium. As such, the
first scanner detects one of a presence and an absence of a
first image on the first side of the medium and the second
scanner detects one of a presence and an absence of a second
image on the second side of the medium.
14 Claims, 9 Drawing Sheets
