Patent US4575736A successfully refreshed from Google Patents.
US4575736A
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US
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Print head for a dot matrix ink printer
Assignee: Nixdorf Computer AG
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Filing: 1984-04-09
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Granted: 1986-03-11
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Expires: 2004-04-09
Abstract
Abstract A print head for an ink printer is provided with an ink reservoir which is arranged near a plane transversely intersecting the print jet opening. Thereby it is possible to bring the print head into various inclined positions without interfering with the ink feed.
Inventors
- 👤 Rolf Roschlein
- 👤 Heinz Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:03
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
Printing apparatus of the type which includes a body forming an ink duct having an input end and outlet end, an ink driver associated with said duct and selectively actuable to cause ink to be emitted from said outlet end, wherein the improvement comprises: an ink reservoir; pivot means connecting said reservoir to said body proximate the outlet of said duct and operative to maintain the inclination of the reservoir regardless of variations, at least within a certain range, in the inclination of said body; and means connecting said reservoir to said input end of said duct.
Claim 2
Dependent Claim
97 words
Printing apparatus of the type which includes a body forming an ink duct having an input end and outlet end, an ink driver associated with said duct and selectively actuable to cause ink to be emitted from said outlet end, wherein the improvement comprises: an ink reservoir; pivot means connecting said reservoir to said body proximate the outlet of said duct and operative to maintain the inclination of the reservoir regardless of variations, at least within a certain range, in the inclination of said body; and means connecting said reservoir to said input end of said duct.
Claim 3
Dependent Claim
20 words
Apparatus as defined in claim 1 wherein said reservoir is suspended from said body by means of said pivot means.
Claim 4
Dependent Claim
13 words
Apparatus as defined in claim 1 wherein said ink drive is piezoelectrically operated.
Claim 5
Dependent Claim
36 words
Apparatus as defined in claim 1 wherein said body forms a plurality of substantially parallel ink ducts each having an input end and and outlet end, all of the outlet ends lying in a common plane.
Claim 6
Dependent Claim
37 words
Apparatus as defined in claim 4 wherein said body defines a common supply chamber connected to all of said inlet ends and said means connecting said reservoir is connected to said input ends through said supply chamber.
Claim 7
Dependent Claim
17 words
Apparatus as defined in claim 5 wherein piezoelectric driver means are associated with each of said ducts.
Claim 8
Dependent Claim
35 words
Apparatus as defined in claim 1 further including mechanical stop means disposed on said body for limiting the relative variation in inclination between said body and said reservoir means in one direction of pivotal rotation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |