US3899035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile transmitting receiving system with fibres having a conductive coating
Assignee: US Philips Corp
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Filing: 1974-01-07
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Granted: 1975-08-12
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Expires: 1994-01-07
Abstract
Abstract Facsimile transmitting and receiving system, comprising a large number of aligned styli which each comprise a glass fibre surrounded by an electrically conducting coating and serve to produce electrostatic charge images when the system is used as a receiver and to perform optical scanning when it is used as a transmitter.
Inventors
- 👤 Ulf Rothgordt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/23; H04N1/29; H04N1/024
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
In a facsimile transmitting and receiving system of the type having electrostatic printing means for recording facsimile signals on a record sheet and optical scanning means for reading a subject copy, the improvement wherein the same styLi used during electrostatic printing are also used during optical reading, each of said styli comprising: an optically conducting glass fibre for optically transmitting luminance values of elemental areas of a subject copy adjacent one end thereof to an optoelectronic transducer; and an electrically conductive coating surrounding said fibre at least at said one end thereof for conducting electrical pulses to said one end in order to electrostatically charge elemental areas of a record sheet adjacent thereto.
Claim 2
Dependent Claim
113 words
In a facsimile transmitting and receiving system of the type having electrostatic printing means for recording facsimile signals on a record sheet and optical scanning means for reading a subject copy, the improvement wherein the same styLi used during electrostatic printing are also used during optical reading, each of said styli comprising: an optically conducting glass fibre for optically transmitting luminance values of elemental areas of a subject copy adjacent one end thereof to an optoelectronic transducer; and an electrically conductive coating surrounding said fibre at least at said one end thereof for conducting electrical pulses to said one end in order to electrostatically charge elemental areas of a record sheet adjacent thereto.
Claim 3
Dependent Claim
44 words
The improvement defined in claim 1 wherein said optically conducting glass fibre is surrounded by a sheath having an index of refraction lower than the index of refraction of said glass fibre and said electrically conductive coating is on the outside of said sheath.
Claim 4
Dependent Claim
14 words
The improvement defined in claim 1 wherein said electrically conductive coating is of metal.
Claim 5
Dependent Claim
34 words
The improvement defined in claim 1 and further comprising a transparent metal film covering the end face of said one end of said fibre, said metal film being in electrical contact with said coating.
Claim 6
Dependent Claim
54 words
The improvement defined in claim 1 wherein said styli are aligned in a row at said one end thereof and in a circle at the other end thereof, a rotating arm carrying an optoelectronic transducer and a commutator for distributing electrical pulses being disposed opposite said other end for successive connection with said styli.
Claim 7
Dependent Claim
39 words
The improvement defined in claim 1 wherein said styli are aligned in a row at said one end thereof and are combined into groups at the other ends thereof, each group thereof being associated with a separate optoelectronic transducer.
Claim 8
Dependent Claim
34 words
The improvement defined in claim 6 wherein optically conducting glass fibres associated with switchable light sources selectively illuminate the elemental area of the subject copy adjacent one stylus of a group at a time.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |