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1. (WO1997016315) APPARATUS FOR PROVIDING INK TO AN INK-JET PRINT HEAD AND FOR COMPENSATING FOR ENTRAPPED AIR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016315 International Application No.: PCT/US1996/017548
Publication Date: 09.05.1997 International Filing Date: 31.10.1996
IPC:
B41J 2/175 (2006.01) ,G01F 23/00 (2006.01) ,G01F 23/72 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
J
TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2
Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005
characterised by bringing liquid or particles selectively into contact with a printing material
01
Ink jet
17
characterised by ink handling
175
Ink supply systems
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23
Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23
Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
30
by floats
64
of the free float type
72
using magnetically actuated indicating means
Applicants:
HEWLETT-PACKARD COMPANY [US/US]; 3000 Hanover Street, M/S 20BO Palo Alto, CA 94304-1181, US
Inventors:
HAUCK, Mark; US
PAWLOWSKI, Norman, E., Jr.; US
Agent:
VALET, Eugene, H.; 4742 42nd Avenue S.W. #3 Seattle, WA 98116, US
Priority Data:
08/550,90231.10.1995US
Title (EN) APPARATUS FOR PROVIDING INK TO AN INK-JET PRINT HEAD AND FOR COMPENSATING FOR ENTRAPPED AIR
(FR) APPAREIL POUR FOURNIR DE L'ENCRE A UNE TETE D'IMPRESSION A JET D'ENCRE ET POUR COMPENSER L'AIR EMPRISONNE
Abstract:
(EN) Apparatus for providing ink to an ink-jet print head in a print cartridge (14) at substantially constant pressure and for compensating for air within the print cartridge (14). A flexible bag (52) is maintained at atmospheric pressure within the print cartridge (14) and actuates a pressure regulator also within the print cartridge (14). By expanding and contracting, the flexible bag (52) compensates for changes in pressure and temperature that occur while the pressure regulator is shut and that affect air entrapped within the print cartridge (14).
(FR) L'invention concerne un appareil permettant de fournir de l'encre à une tête d'impression à jet d'encre dans une cartouche d'impression (14) à une pression sensiblement constante et de compenser l'air emprisonné au sein de la cartouche d'impression (14). Une enveloppe souple (52) est maintenue à la pression atmosphérique au sein de la cartouche d'impression (14) et actionne un régulateur de pression également à l'intérieur de la cartouche d'impression (14). Grâce à sa dilatation et à son retrait, cette enveloppe souple (52) compense les variations de pression et de température se produisant lors de la fermeture du régulateur de pression et influant sur l'air emprisonné à l'intérieur de la cartouche d'impression (14).
Designated States: DE, GB, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0902742