Patent US3781904A successfully refreshed from Google Patents.
US3781904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing raster dot images
Assignee: Olympia Werke AG
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Filing: 1972-02-02
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Granted: 1973-12-25
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Expires: 1992-02-02
Abstract
Abstract An apparatus for producing images with raster dots on a recording carrier. The recording carrier has a coating which can be modified by writing electrodes to which an electrical voltage can be applied. A transporting member is used to move the recording carrier relative to the writing electrodes. An oscillator imparts an oscillating movement to the writing electrodes, each writing electrode sweeping over a respective area corresponding in size to a raster dot.
Inventors
- 👤 G Lorenzen
- 👤 F Firnig
- 👤 H Bettin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/001; B41J25/006; B41J2/00; B41J2/385; B41J2/425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
An apparatus for producing images with raster dots on a recording carrier having a coating which can be modified, writing electrodes to which an electrical voltage can be applied for modifying the coating, and means for providing a relative movement between the recording carrier and the writing electrodes, the improvement comprising: a. a plurality of oscillatable supporting arms in a juxtaposed arrangement, each supporting arm carrying a plurality of said writing electrodes; b. a camshaft disposed along said supporting arms; c. a plurality of cams affixed to said camshaft and disposed in an angularly offset manner with respect to one another; each cam being operatively coupled to a separate one of said supporting arms, said supporting arms being deflected in succession upon rotation of said camshaft for causing said writing electrodes to perform an oscillating movement and sweep over respective areas corresponding in size to areas of respective raster dots while electric voltage is applied to said writing electrodes, said writing electrodes being supplied with electrical voltage in sequence from a single source.
Claim 2
Independent Claim
173 words
An apparatus for producing images with raster dots on a recording carrier having a coating which can be modified, writing electrodes to which an electrical voltage can be applied for modifying the coating, and means for providing a relative movement between the recording carrier and the writing electrodes, the improvement comprising: a. a plurality of oscillatable supporting arms in a juxtaposed arrangement, each supporting arm carrying a plurality of said writing electrodes; b. a camshaft disposed along said supporting arms; c. a plurality of cams affixed to said camshaft and disposed in an angularly offset manner with respect to one another; each cam being operatively coupled to a separate one of said supporting arms, said supporting arms being deflected in succession upon rotation of said camshaft for causing said writing electrodes to perform an oscillating movement and sweep over respective areas corresponding in size to areas of respective raster dots while electric voltage is applied to said writing electrodes, said writing electrodes being supplied with electrical voltage in sequence from a single source.
Claim 3
Dependent Claim
49 words
An arrangement as defined in claim 1 wherein said writing electrodes are provided with cutting edges extending in the direction of the raster lines, a respective one of said cutting edges being provided on that side of each of said writing electrodes which is to face the recording carrier.
Claim 4
Dependent Claim
38 words
An arrangement as defined in claim 1 wherein said writing electrodes each have a writing surface configuration on their respective sides which are to face the recording carrier, which corresponds substantially to the shape of a raster dot.
Claim 5
Dependent Claim
37 words
An arrangement as defined in claim 3 wherein said writing surfaces of each of said writing electrodes have a roughness which is substantially equal to that of the surface of the recording carrier having the coating thereon.
Claim 6
Dependent Claim
61 words
An arrangement as defined in claim 1 further comprising spring means, and wherein said writing electrodes have the width corresponding to the width of a raster dot; said supporting arms are mounted to be pivotal against the force of said spring means to cause an oscillating motion of said writing electrodes in the direction of the height of the raster dots.
Claim 7
Dependent Claim
43 words
An arrangement as defined in claim 5 wherein each said supporting arm comprises a first end and a second end, individual ones of said writing electrodes being carried respectively on said first ends, said spring means being operatively connected to said second ends.
Claim 8
Dependent Claim
30 words
An arrangement as defined in claim 5 wherein said writing electrodes are adjacently disposed, and correspond in number to the raster dots in one width of a given raster field.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |