EP 1074390 A1 20010207 - Liquid level sensor
Title (en)
Liquid level sensor
Title (de)
FLÜSSIGKEITSSTANDSENSOR
Title (fr)
Détecteur de niveau de liquide
Publication
Application
Priority
EP 99306161 A 19990803
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
IPC 8 full level
B41J 2/175 (2006.01); G01F 23/22 (2006.01)
CPC (source: EP)
B41J 2/17566 (2013.01); B41J 2002/17579 (2013.01)
Citation (search report)
- [A] US 3868620 A 19750225 - MCBRIDE JR LYLE E, et al
- [A] US 4720997 A 19880126 - DOAK RONI K [US], et al
- [A] US 4609913 A 19860902 - ARBOGAST THOMAS P [US], et al
- [A] US 3955416 A 19760511 - WAIWOOD WILLIAM PAUL
- [A] US 5136305 A 19920804 - IMS DALE R [US]
- [A] US 4779460 A 19881025 - CRUICKSHANK WILLIAM T [US]
- [A] US 5146785 A 19920915 - RILEY RICHARD E [US]
- [A] US 5406315 A 19950411 - ALLEN ROSS R [US], et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1074390 A1 20010207; AU 4871200 A 20010208; AU 736573 B2 20010802; CN 1288150 A 20010321; JP 2001047642 A 20010220
DOCDB simple family (application)
EP 99306161 A 19990803; AU 4871200 A 20000719; CN 00122567 A 20000803; JP 2000229331 A 20000728