US4450455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet head
Assignee: Canon Inc
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Filing: 1982-05-28
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Granted: 1984-05-22
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Expires: 2002-05-28
Abstract
Abstract An ink jet head comprises an orifice plate constituted of a hardened film of a photosensitive resin having an orifice which extends therethrough in the direction of its thickness.
Inventors
- 👤 Hiroshi Sugitani
- 👤 Masakazu Ozawa
- 👤 Hiroto Matsuda
- 👤 Masami Ikeda
- 👤 Haruyuki Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:17
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/1626; B41J2/162; B41J2/1623; B41J2/1631
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
An ink jet head comprising an orifice plate made of a hardened film of a photosensitive resin and having an orifice which extends therethrough in the direction of its thickness, said orifice plate having a roughened surface.
Claim 2
Dependent Claim
37 words
An ink jet head comprising an orifice plate made of a hardened film of a photosensitive resin and having an orifice which extends therethrough in the direction of its thickness, said orifice plate having a roughened surface.
Claim 3
Dependent Claim
17 words
An ink jet head according to claim 1, wherein said photosensitive resin is a dry film photoresist.
Claim 4
Dependent Claim
19 words
An ink jet head according to claim 1, wherein said plate is in the form of a flat plate.
Claim 5
Dependent Claim
19 words
An ink jet head according to claim 1, wherein said plate has a thickness of about 25μ to 100μ.
Claim 6
Dependent Claim
15 words
An ink jet head according to claim 1, wherein a plurality of orifices are provided.
Claim 7
Dependent Claim
59 words
An ink jet head comprising an orifice plate made of a hardened film of a photosensitive resin and having an orifice which extends therethrough in the direction of its thickness, wherein on a surface of said plate at least the periphery of said orifice has a smooth surface, with other regions of the surface being of a rough surface.
Claim 8
Dependent Claim
59 words
An ink jet head comprising an orifice plate made of a hardened film of a photosensitive resin and having an orifice which extends therethrough in the direction of its thickness, wherein on a surface of said plate at least the periphery of said orifice has a smooth surface, with other regions of the surface being of a rough surface.
Claim 9
Dependent Claim
29 words
An ink jet head according to claim 1, wherein said orifice plate of hardened photosensitive resin is firmly attached to a body of said ink jet head by adhesion.
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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |