EP0446918A3

Thermal ink-jet printhead having improved heater arrangement

Abstract

A thermal ink-jet type printhead is disclosed which comprises a strip-like thin metallic layer (54) formed on a substrate (52). The layer (54) is configured so as to define a narrow portion (56) which is positioned between broad portions (58a, 58b). The narrow portion (56) defines a heating element which is integral with the broad portions (58a, 58b) which act as electrodes. Electrical Heating pulses are supplied to the narrow heater portion (56) via the electrodes. The heater arrangement (50) is durable to thermal stresses generated by a superheating and, accordingly is well suited for spontaneous or homogeneous nucleation.

EP0446918A3, drawing sheet 1 — Sheet 1 of 1

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Projected expiry passed 14 March 2011, 15.5 years ago.

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Citations
Document	Relation	Office	Category	Cited during
EP0245002A2	Cites	European Patent Office (EPO)	A	Search report
EP0350953A2	Cites	European Patent Office (EPO)	A	Search report
DE3012946A1	Cites	Germany	A	Search report

3 priority claims, no other members on record

This recordMember, by publication datePriority claim

Priority claims3

Priority claims
Document	Office	Kind	Date
6640790	Japan	–	1990-03-15
6640790	Japan	A	1990-03-15
JP19900066407	–	–	–

27 legal events, as the office reported them to INPADOC

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	Event	Code
1997-12-01	Nl: lapsed or anulled due to non-payment of the annual feeLapsedNLV4	NLV4
1997-11-12	Patent revokedRevoked27W	27W
1997-11-12	Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting stateRevoked970627GBPR	GBPR
1997-09-26	Patent revokedRevokedORIGINAL CODE: 0009271RDAG	RDAG
1997-09-26	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: PATENT REVOKEDSTAA	STAA
1997-06-13	Patent revokedRevokedORIGINAL CODE: EPIDOS REVORDAH	RDAH
1997-02-26	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP
1996-05-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP
1996-03-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP
1996-03-12	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP
1996-02-07	Reply of patent proprietor to notice(s) of oppositionOppositionORIGINAL CODE: EPIDOS OBSOPLBF	PLBF
1996-01-09	Reply of patent proprietor to notice(s) of oppositionOppositionORIGINAL CODE: EPIDOS OBSOPLBF	PLBF
1995-09-01	Nl: opposition has been filed with the epoOppositionNLR1	NLR1
1995-07-12	Opposition filedOpposition26	26
1995-05-23	Opposition filedOppositionORIGINAL CODE: 0009260PLBI	PLBI
1994-11-11	It: translation for a ep patent filedITF	ITF
1994-11-11	It: translation for a ep patent filedITF	ITF
1994-10-07	Fr: translation filedET	ET
1994-09-22	Corresponds to:REF	REF
1994-08-17	Designated contracting statesAK	AK
1994-07-01	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA
1993-12-15	First examination report despatched17Q	17Q
1992-01-29	Designated contracting statesAK	AK
1991-12-10	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL
1991-09-18	Request for examination filed17P	17P
1991-09-18	Designated contracting statesAK	AK
1991-08-02	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI

Thermal ink-jet printhead having improved heater arrangement

Abstract

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