Global Patent Index - EP 0771655 B1

EP 0771655 B1 2002-09-25 - Short detection circuit for ink jet printer

Title (en)

Short detection circuit for ink jet printer

Title (de)

Kurzschlussnachweisschaltung für Tintenstrahldrucker

Title (fr)

Circuit de détection de court-circuits pour imprimante à jet d'encre

Publication

EP 0771655 B1 (EN)

Application

EP 96307865 A

Priority

US 55095895 A

Abstract (en)

[origin: EP0771655A2] A detection technique comprises a plurality of closely spaced, continuous detection electrodes placed immediately below and along the length of a charge plate in an ink jet printing system. The detection electrodes typically comprise parallel conductors. A circuit is provided for monitoring the conductivity between the electrodes. The electrodes are electrically isolated from one another when properly placed on the catcher surface. If the conductivity, as measured by the circuit, rises above a predetermined threshold level it is an indication that some amount of unwanted ink is present at the location of the conductors. This signals improper print head operation requiring a print head shut-down and/or clean cycle. <IMAGE>

IPC 1-7 (main, further and additional classification)

B41J 2/07; B41J 2/125; B41J 2/185

IPC 8 full level (invention and additional information)

B41J 2/075 (2006.01); B41J 2/07 (2006.01); B41J 2/125 (2006.01); B41J 2/185 (2006.01)

CPC (invention and additional information)

B41J 2/07 (2013.01); B41J 2/125 (2013.01); B41J 2/185 (2013.01); B41J 2002/1853 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0771655 A2 19970507; EP 0771655 A3 19980916; EP 0771655 B1 20020925; CA 2189284 A1 19970501; DE 69623907 D1 20021031; DE 69623907 T2 20030807; JP 3946800 B2 20070718; JP H09201974 A 19970805

INPADOC legal status


2013-07-31 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20121030

2013-06-26 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20121030

2012-08-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20111102

2012-08-09 [REG DE R119] APPLICATION DEEMED WITHDRAWN, OR IP RIGHT LAPSED, DUE TO NON-PAYMENT OF RENEWAL FEE

- Document: DE 69623907

- Effective date: 20120501

2012-07-31 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20120501

2012-07-20 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20120629

2011-11-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20110930

- Year of fee payment: 16

2011-02-28 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20101029

- Year of fee payment: 15

2010-11-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20101004

- Year of fee payment: 15

2004-10-22 [REG FR TP] TRANSMISSION OF PROPERTY

2004-04-21 [REG GB 732E] AMENDMENTS TO THE REGISTER IN RESPECT OF CHANGES OF NAME OR CHANGES AFFECTING RIGHTS (SECT. 32/1977)

2003-09-17 [26N] NO OPPOSITION FILED

- Effective date: 20030626

2003-04-11 [ET] FR: TRANSLATION FILED

2002-10-31 [REF] CORRESPONDS TO:

- Document: DE 69623907 20021031

2002-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

2002-09-25 [REG GB FG4D] EUROPEAN PATENT GRANTED

1999-12-22 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19991109

1998-09-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): DE FR GB

1997-08-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19970603

1997-05-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB