Global Patent Index - EP 1074390 A1

EP 1074390 A1 2001-02-07 - Liquid level sensor

Title (en)

Liquid level sensor

Title (de)

FLÜSSIGKEITSSTANDSENSOR

Title (fr)

Détecteur de niveau de liquide

Publication

EP 1074390 A1 (EN)

Application

EP 99306161 A

Priority

EP 99306161 A

Abstract (en)

A sensor (1) for detecting the level of ink (10) in a chamber (9) in an ink jet printer, the sensor comprising: a polyimide sheet (2); a flexi-circuit formed on a first side of the polyimide sheet; a thermistor (3) mounted on the first side of the polyimide sheet in contact with the flexi-circuit, the other side of the sheet being arranged to form, in use, part of a wall of the chamber; wherein the amount of heat dissipated through the polyimide sheet and detected by the thermistor indicates the presence of absence of liquid adjacent to the sensor and hence provides level detection. <IMAGE>

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

B41J 2/175

IPC 8 full level (invention and additional information)

B41J 2/175 (2006.01); G01F 23/22 (2006.01)

CPC (invention and additional information)

B41J 2/17566 (2013.01); B41J 2002/17579 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 1074390 A1 20010207; AU 4871200 A 20010208; AU 736573 B2 20010802; CN 1288150 A 20010321; JP 2001047642 A 20010220

INPADOC legal status


2002-05-15 [18W] WITHDRAWN

- Date of withdrawal: 20020322

2001-10-24 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB IT

2001-09-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010710

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT

2001-02-07 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI