Patent US4432004A successfully refreshed from Google Patents.
US4432004A
Expired / Lapsed
US
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Device for capping the jet nozzles of an ink jet printing head
Assignee: US Philips Corp
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Filing: 1981-10-22
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Granted: 1984-02-14
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Expires: 2001-10-22
Abstract
Abstract A capping device consists of a container is filled with a wetting medium and whose side which faces the jet nozzles is covered by a semi-permeable diaphragm. The diaphragm may be stretched across the holder in a tight or in loose manner. The diaphragm is permeable for the wetting medium and preferably consists of a cellulose hydrate with a thickness of approximately 22 μm.
Inventors
- 👤 Alfred Glattli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:02
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/165; B41J2/16517; B41J2/16552; B41J2/16505; B41J2/16508
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A device for capping jet nozzles of an ink jet printing head by means of deformable material, comprising: a container which is filled with a wetting medium; a semipermeable diaphragm covering the side of said container which faces the jet nozzles, at least at the area of said jet nozzles; said semipermeable diaphragm being arranged against the mouths of said jet nozzles; said diaphragm being permeable for the wetting medium; and a piston arranged inside said container on which a force is exerted in the direction of the diaphragm.
Claim 2
Independent Claim
89 words
A device for capping jet nozzles of an ink jet printing head by means of deformable material, comprising: a container which is filled with a wetting medium; a semipermeable diaphragm covering the side of said container which faces the jet nozzles, at least at the area of said jet nozzles; said semipermeable diaphragm being arranged against the mouths of said jet nozzles; said diaphragm being permeable for the wetting medium; and a piston arranged inside said container on which a force is exerted in the direction of the diaphragm.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1, characterized in that the wetting medium (2) is a non-volatile liquid.
Claim 4
Independent Claim
20 words
A device as claimed in claims 1 or 2, characterized in that the diaphragm (4) consists of a cellulose hydrate.
Claim 5
Independent Claim
48 words
A device as claimed in claims 1 or 2, characterized in that the container (1) has a cylindrical shape, the diaphragm (4) being stretched between a conical end portion (13) of the container (1) and the inner side of a coupling nut (11) which can be screwed thereon.
Claim 6
Independent Claim
26 words
A device as claimed in claims 1 or 2, characterized in that the container (1) is connected to a storage container for the wetting medium (2).
Claim 7
Dependent Claim
47 words
A device as claimed in claim 1, characterized in that the diaphragm (4) is loosely stretched across the side of the container (1) which faces the jet nozzles (6) and settles against the jet nozzles (6) under the influence of the force exerted by the piston (8).
Claim 8
Dependent Claim
35 words
A device as claimed in claim 6, characterized in that the force exerted on the piston (8) is produced by a spring (7) between the piston (8) and the bottom (16) of the container (1).
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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |