EP 0638424 A3 19960731 - Thermal ink jet printhead and method of manufacture.
Title (en)
Thermal ink jet printhead and method of manufacture.
Title (de)
Thermo-Tintenstrahldruckkopf und Herstellungsverfahren.
Title (fr)
Tête d'impression par jet d'encre thermique et méthode de fabrication.
Publication
Application
Priority
US 10431093 A 19930809
Abstract (en)
[origin: EP0638424A2] A thermal ink jet printhead and method of manufacture wherein an ink feed opening (31) in a thin film substrate (10) is axially aligned with a central opening in a heater resistor (24, 26) disposed on the substrate. The ink feed opening (31) is also aligned with a firing chamber (30) formed in a barrier layer (28) disposed on the substrate and above and surrounding the heater resistor (24, 26), and is further aligned with an orifice opening (34) in an orifice plate (32) disposed on the barrier layer (28). This novel geometrical arrangement is operative to enhance the printhead ink ejection efficiency and to minimize cavitation wear on the heater resistors therein. In addition, the above axial symmetry may be provided by semi-circular heater resistors (24, 26), rectangularly shaped heater resistors (54, 56), or heater resistors of other shapes (36, 66) which are symmetrically arranged around the above firing chamber for the TIJ printhead. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/05 (2006.01); B41J 2/14 (2006.01); B41J 2/16 (2006.01)
CPC (source: EP)
B41J 2/1412 (2013.01); B41J 2/14129 (2013.01); B41J 2/1601 (2013.01); B41J 2/1629 (2013.01); B41J 2/1631 (2013.01); B41J 2/1634 (2013.01); B41J 2/1642 (2013.01); B41J 2/1646 (2013.01); B41J 2202/11 (2013.01)
Citation (search report)
- [Y] EP 0244214 A1 19871104 - HEWLETT PACKARD CO [US]
- [Y] US 4870433 A 19890926 - CAMPBELL ALAN S [US], et al
- [A] US 3177800 A 19650413 - FRAZER WELSH HERBERT
- [A] EP 0124312 A2 19841107 - HEWLETT PACKARD CO [US]
- [A] US 4580149 A 19860401 - DOMOTO GERALD A [US], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 011, no. 302 (M - 629) 2 October 1987 (1987-10-02)
- [A] PATENT ABSTRACTS OF JAPAN vol. 012, no. 464 (M - 771) 6 December 1988 (1988-12-06)
- [PX] PATENT ABSTRACTS OF JAPAN vol. 018, no. 317 (M - 1622) 16 June 1994 (1994-06-16)
- [A] PATENT ABSTRACTS OF JAPAN vol. 010, no. 281 (M - 520) 25 September 1986 (1986-09-25)
- [A] PATENT ABSTRACTS OF JAPAN vol. 010, no. 062 (M - 460) 12 March 1986 (1986-03-12)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0638424 A2 19950215; EP 0638424 A3 19960731; JP H0768763 A 19950314
DOCDB simple family (application)
EP 94305204 A 19940715; JP 20916294 A 19940809