US4746939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture recording apparatus
Assignee: Fujifilm Business Innovation Corp
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Filing: 1981-12-03
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Granted: 1988-05-24
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Expires: 2001-12-03
Abstract
Abstract A picture recording apparatus having an endless dielectric belt with a plurality of spaced apart poles thereon has a multiple stylus electrode assembly in contact with an inner surface of the belt. Magnetic fluid or magnetic powder is applied to the belt to form magnetic rise elements on the belt and these rise elements are transferred to a recording sheet thus forming dots thereon by an electrostatic force generated by the assembly electrodes in response to an input signal.
Inventors
- 👤 Masatsugu Kikuchi
- 👤 Syoji Wakoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:39
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/43; G; G03; G03G; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G15/348
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A picture recording apparatus, comprising: an endless dielectric belt having a plurality of magnetic poles arranged thereon which are spaced apart from one another; a multiple stylus electrode assembly having an electrode surface, said surface being in contact with an inner surface of said endless dielectric belt; means for applying a magnetic fluid or magnetic powder onto said plurality of magnetic poles to form magnetic rise elements on said endless dielectric belt; means for transporting a recording sheet so that said recording sheet is spaced from top surfaces of said magnetic rise elements; means for transporting said endless dielectric belt, said endless dielectric belt and said recording sheet being transported in synchronization with each other; and means for applying a signal voltage to said multiple stylus electrode assembly.
Claim 2
Dependent Claim
128 words
A picture recording apparatus, comprising: an endless dielectric belt having a plurality of magnetic poles arranged thereon which are spaced apart from one another; a multiple stylus electrode assembly having an electrode surface, said surface being in contact with an inner surface of said endless dielectric belt; means for applying a magnetic fluid or magnetic powder onto said plurality of magnetic poles to form magnetic rise elements on said endless dielectric belt; means for transporting a recording sheet so that said recording sheet is spaced from top surfaces of said magnetic rise elements; means for transporting said endless dielectric belt, said endless dielectric belt and said recording sheet being transported in synchronization with each other; and means for applying a signal voltage to said multiple stylus electrode assembly.
Claim 3
Dependent Claim
32 words
The picture recording apparatus as claimed in claim 1 wherein said endless dielectric belt comprises a support made of a polyester film, said plurality of magnetic poles being formed in said film.
Claim 4
Dependent Claim
21 words
The picture recording apparatus claimed in claim 2 wherein said multiple stylus electrode assembly has an electrode pitch of 12 pieces/mm.
Claim 5
Dependent Claim
25 words
The picture recording apparatus claimed in claim 2 wherein said top surface of said magnetic rise elements is about 50 μm from said recording sheet.
Claim 6
Dependent Claim
22 words
The apparatus claimed in claim 4 wherein said means for transporting said endless dielectric belt comprises first, second and third drive shafts.
Claim 7
Dependent Claim
22 words
The picture recording apparatus claimed in claim 5 wherein said means for applying said magnetic powder or magnetic fluid comprises a roll.
References Cited (Backward Citations)
US3437074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |