EP 0926631 A2 19990630 - Measurement of paper speed using laser speckle detection
Title (en)
Measurement of paper speed using laser speckle detection
Title (de)
Messung der Papiergeschwindigkeit mittels Detektion von Laser-Speckle
Title (fr)
Mesurage de la vitesse du papier utilisant la détection de la granulation produite par laser
Publication
Application
Priority
- US 6843497 P 19971221
- US 2345798 A 19980213
Abstract (en)
In a postage printing device, a printer is employed to print postage indicia on mail pieces. The printer is preferably a noncontact printer such as an ink-jet printer. Printing occurs as the mail piece moves relative to the print head of the printer, which requires that reliable motion information (e.g. a print clock signal) be made available to the electronics driving the print head. The reliable motion is provided in a noncontact way, preferably by directing a laser beam toward the mail piece and detecting a moving speckle pattern in the light scattered from the mail piece. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 11/00 (2006.01); B41J 11/42 (2006.01); B41J 13/12 (2006.01); G07B 17/00 (2006.01)
CPC (source: EP)
B41J 11/008 (2013.01); B41J 11/42 (2013.01); B41J 13/12 (2013.01); G07B 17/00508 (2013.01); G07B 17/00661 (2013.01); G07B 2017/00532 (2013.01); G07B 2017/00669 (2013.01); G07B 2017/00693 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0926631 A2 19990630; EP 0926631 A3 20000906; CA 2256237 A1 19990621; CA 2256237 C 20080212
DOCDB simple family (application)
EP 98123824 A 19981215; CA 2256237 A 19981216