Global Patent Index - EP 2026139 A2

EP 2026139 A2 2009-02-18 - Belt-conveyance control device, image forming apparatus, belt-conveyance control method, and computer program product

Title (en)

Belt-conveyance control device, image forming apparatus, belt-conveyance control method, and computer program product

Title (de)

Bandfördersteuerungsvorrichtung, Bilderzeugungsvorrichtung, Bandfördersteuerungsverfahren und Computerprogrammprodukt

Title (fr)

Dispositif de commande de transport de courroie, appareil de formation d'images, procédé de commande de transport de courroie, et produit de programme informatique

Publication

EP 2026139 A2 (EN)

Application

EP 08251756 A

Priority

  • JP 2007139084 A
  • JP 2008056437 A

Abstract (en)

A belt-conveyance control device includes a belt (30) that is supported by a drive roller (31) and a driven roller (32), a pulse motor (11) that drives the drive roller (31), and a first encoder (18) that is attached to the driven roller (32) to detect a displacement of the belt (30). The belt-conveyance control device controls a conveying speed of the belt (30). The belt-conveyance control device further includes a control unit that calculates a difference between the displacement detected by the first encoder (18) and a predetermined target value, calculates a pulse frequency of a driving pulse signal for driving the pulse motor (11) based on a feedback control based on the difference and a feed-forward control based on a reference driving pulse frequency, sets a control range of the feedback control to be equal to or smaller than a frequency of one rotation of the driven roller (32), and controls driving of the pulse motor (11) such that the belt (30) moves at a constant speed.

IPC 8 full level (invention and additional information)

G03G 15/00 (2006.01)

CPC (invention and additional information)

G03G 15/5008 (2013.01); G03G 15/1615 (2013.01); G03G 2215/00139 (2013.01); G03G 2215/00156 (2013.01); G03G 2215/0158 (2013.01)

Citation (applicant)

Designated contracting state (EPC)

DE ES FR GB IT NL

Designated extension state (EPC)

AL BA MK RS

EPO simple patent family

EP 2026139 A2 20090218; EP 2026139 A3 20140910

INPADOC legal status


2018-04-04 [INTG] ANNOUNCEMENT OF INTENTION TO GRANT

- Effective date: 20180309

2018-03-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: G03G 15/00 20060101ALI20180130BHEP

2018-03-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: G03G 15/16 20060101AFI20180130BHEP

2015-05-13 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): DE ES FR GB IT NL

2015-05-13 [AXX] PAYMENT OF EXTENSION FEES

- Countries: MK

2015-05-13 [AXX] PAYMENT OF EXTENSION FEES

- Countries: BA

2015-05-13 [AXX] PAYMENT OF EXTENSION FEES

- Countries: RS

2015-05-13 [AXX] PAYMENT OF EXTENSION FEES

- Countries: AL

2014-09-10 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

2014-09-10 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA MK RS

2014-09-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: G03G 15/00 20060101AFI20140804BHEP

2009-02-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20080522

2009-02-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

2009-02-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA MK RS