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EP0314486A2
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EP
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Hydraulically tuned channel architecture
Assignee: HP Inc
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Filing: 1988-10-28
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Granted: —
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Expires: 2008-10-28
Abstract
Abstract The use of lumped resistive elements (22, 24, 32) in an ink feed channel (10) between an ink-propelling element, such as a resistor, (12) and an ink supply plenum (16) provide a means of achieving resistive decoupling and meniscus resonance control with a minimum of deleterious side effects and design compromises typical of prior art solutions.
Inventors
- 👤 Kenneth E. Trueba
- 👤 William R. Knight
- 👤 Niels J. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:31
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14032; B41J2/1404; B41J2/015; B41J2/04; B41J2/045; B41J2/05; B41J2002/14387; B41J2002/14403
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
An ink-jet printhead comprising a plurality of ink-propelling elements (12) and a plurality of nozzles (16) associated therewith for firing a quantity of ink (A) toward a print medium, wherein ink is supplied to an ink propelling element from a plenum chamber (14) by means of an ink feed channel (10), characterised in that there is at least one constriction (22,23,32) in the ink feed channel.
Claim 2
Dependent Claim
66 words
An ink-jet printhead comprising a plurality of ink-propelling elements (12) and a plurality of nozzles (16) associated therewith for firing a quantity of ink (A) toward a print medium, wherein ink is supplied to an ink propelling element from a plenum chamber (14) by means of an ink feed channel (10), characterised in that there is at least one constriction (22,23,32) in the ink feed channel.
Claim 3
Dependent Claim
13 words
The printhead of Claim 1 wherein the ink-propelling elements comprise resistive heating elements.
Claim 4
Dependent Claim
34 words
The printhead of Claims 1 or 2 wherein one end of the ink feed channel is provided with a pair of opposed projections (24), thereby forming a constriction between the plenum and the channel.
Claim 5
Dependent Claim
10 words
The printhead of Claim 3 wherein said projections are sharp.
Claim 6
Dependent Claim
11 words
The printhead of Claim 3 wherein said projections are rounded .
Claim 7
Dependent Claim
26 words
The printhead of any preceding Claims wherein at least one constriction is achieved by setting the ink-propelling element in a plane below that of the channel.
Claim 8
Dependent Claim
35 words
The printhead of Claim 6 wherein the ink-propelling element is about 5 to 40 um below the plane of the channel, as measured from the top of the element to the bottom of the channel.
Claim 9
Dependent Claim
28 words
The printhead of any preceding Claim wherein at least one constriction is achieved by formation of at least one sharp bend (22) along the length of the channel.
Claim 10
Dependent Claim
31 words
The printhead of any preceding Claim wherein said at least one constriction comprises a projection (32) formed across at least a portion of one of the lateral sides of said channel.
Claim 11
Dependent Claim
19 words
The printhead of any preceding Claim wherein said at least one constriction comprises a pillar (22′) in said channel.
References Cited (Backward Citations)
No citation records indexed.
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