EP 1594016 A2 20051109 - Belt device, image forming apparatus, and method to control belt speed
Title (en)
Belt device, image forming apparatus, and method to control belt speed
Title (de)
Band, Bilderzeugungsgerät , und Verfahren zur Bandgeschwindigkeitskontrolle
Title (fr)
Bande sans fin, appareil de formation d'images, et méthode de contrôle de vitesse de la bande
Publication
Application
Priority
JP 2004137353 A 20040506
Abstract (en)
A first sensor (6, 70) detects a first speed of the belt (10) based on detection of marks on the belt (10) and a first belt speed controlling unit (70) controls a speed of the belt (10) based on the first speed. A second sensor (65, 70') detects a second speed of the belt (10) based on some other method and a second belt speed controlling unit (70') controls a speed of the belt (10) based on the second speed. A scale-mark degradation determining unit (73) that determines whether there is a degradation in the quality of the marks and detects an amount of degradation upon determining that there is a degradation in the quality of the marks. The first belt speed controlling unit (70) is made to control a speed of the belt (10) if the amount of degradation detected by the scale-mark degradation determining unit (73) is less than a predetermined value, and the second belt speed controlling unit (70') is made to control a speed of the belt (10) if the amount of degradation detected by the scale-mark degradation determining unit (73) is not less than the predetermined value.
IPC 1-7
IPC 8 full level
G03G 15/16 (2006.01)
CPC (source: EP)
G03G 15/16 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1594016 A2 20051109; EP 1594016 A3 20110302; EP 1594016 B1 20150225
DOCDB simple family (application)
EP 05252414 A 20050418