US4730203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Write head for an optical printer
Assignee: Fujifilm Business Innovation Corp
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Filing: 1986-08-06
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Granted: 1988-03-08
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Expires: 2006-08-06
Abstract
Abstract A write head for an optical printer using a vacuum fluorescent tube. The write head includes strip like anodes 12 having a phosphor layer 16, control electrodes 14 having slits 15 formed obliquely across the anodes and a first plate-like control electrode 19 having slits 20 formed at positions corresponding to the slits 15 of the second control electrodes 14.
Inventors
- 👤 Hiroshi Watanabe
- 👤 Yukihiko Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/15; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/4476
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A write head for an optical printer in the form of a vacuum fluorescent tube comprising: a substrate; a plurality of strip-like anode conductors arranged in parallel on the substrate; phosphor layers deposited on the anode conductors; control electrodes arranged above the anode conductors; and cathodes stretched above the control electrodes; the control electrodes comprising a plurality of second control electrodes formed with slits which cross the anode conductors obliquely, and a first control electrode arranged above the second control electrode, at positions the first control electrode being formed with slits at positions corresponding to the slits of the second control electrodes.
Claim 2
Dependent Claim
102 words
A write head for an optical printer in the form of a vacuum fluorescent tube comprising: a substrate; a plurality of strip-like anode conductors arranged in parallel on the substrate; phosphor layers deposited on the anode conductors; control electrodes arranged above the anode conductors; and cathodes stretched above the control electrodes; the control electrodes comprising a plurality of second control electrodes formed with slits which cross the anode conductors obliquely, and a first control electrode arranged above the second control electrode, at positions the first control electrode being formed with slits at positions corresponding to the slits of the second control electrodes.
Claim 3
Dependent Claim
29 words
A write head as claimed in claim 1 in which the slits of the first control electrode are greater in width than the slits of the second control electrodes.
Claim 4
Dependent Claim
24 words
A write head as claimed in claim 1 or claim 2 in which the phosphor is uniformly and continuously deposited on the anode conductors.
Claim 5
Dependent Claim
49 words
A write head as claimed in claims 1 or 2 in which the first control electrode has a control section corresponding to the region in which the slits are located and an insulating layer arranged on the surface of the first control electrode other then over the control section.
Claim 6
Dependent Claim
20 words
A write head as claimed in claims 1 or 2 in which the insulating layer is a flat glass plate.
Claim 7
Dependent Claim
47 words
A write head as claimed in claim 3 in which the first control electrode has a control section corresponding to the region in which the slits are located and an insulating layer arranged on the surface of the first control electrode other than over the control section.
Claim 8
Dependent Claim
18 words
A write head as claimed in claim 3 in which the insulating layer is a flat glass plate.
Claim 9
Dependent Claim
18 words
A write head as claimed in claim 4 in which the insulating layer is a flat glass plate.
References Cited (Backward Citations)
US4675572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |