Patent US2086595A successfully refreshed from Google Patents.
Patent US3678852A successfully refreshed from Google Patents.
US3678852A
Expired / Lapsed
US
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Printing and copying employing materials with surface variations
Assignee: Energy Conversion Devices Inc
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Filing: 1970-04-10
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Granted: 1972-07-25
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Expires: 1990-04-10
Abstract
Abstract A printing plate is coated with an amorphous semiconductor material capable of being switched between a generally amorphous or disordered state and a crystalline or more ordered state in response to light. In the crystalline or more ordered state the surface of the material is rough or grainy, while in the generally amorphous or disordered state the surface of the material is smoother. Solutions adhere to the rough surface of the material and do not adhere to the smooth surface. Ink may be fixed directly to the material or transferred to a document or offset roller. The material may be cleaned and reset into one of its states in preparation for recording another image.
Inventors
- 👤 Julius Feinleib
- 👤 Peter H Klose
- 👤 Stanford R Ovshinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:49
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03F; G03F7/00; G03F7/004; G03F7/0042; G03F7/0044; G03F7/20; G03F7/2051; G03F7/2053; G06; G06K; G06K15/00; G06K15/02; G06K15/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
The method of claim 1 wherein said layer is composed of an amorphous material having an alterable surface structure which is capable of being changed between a generally amorphous stable state having a certain localized bonding between atoms and a different stable state having a different localized bonding between atoms, said change being produced in response to said energy applied thereto.
Claim 2
Dependent Claim
62 words
The method of claim 1 wherein said layer is composed of an amorphous material having an alterable surface structure which is capable of being changed between a generally amorphous stable state having a certain localized bonding between atoms and a more ordered stable state having a different localized bonding between atoms, said change being produced in response to said energy applied thereto.
Claim 3
Dependent Claim
21 words
The method of claim 3 wherein said solution adheres to those areas of said layer residing in the more ordered state.
Claim 4
Dependent Claim
28 words
The method as defined in claim 4 wherein said solution includes ink, and further characterized by the addition of the step of fixing said ink to said material.
Claim 5
Dependent Claim
33 words
The method of claim 4 wherein said solution includes ink, and further characterized by the addition of the step of transferring said solution from said selected areas of said layer to a document.
Claim 6
Dependent Claim
67 words
The method as defined in claim 4 further characterized by the addition of the step of applying ink to said layer after wetting said layer with said solution so that ink adheres to those areas of the material which reside in the generally amorphous state and said ink does not adhere to those areas of said material in said more ordered state having said solution adhering thereto.
Claim 7
Dependent Claim
28 words
The method of claim 7 further characterized by the step of transferring said ink from said areas of said material to which said ink adheres to a document.
Claim 8
Dependent Claim
36 words
The system as defined in claim 4 wherein said solution includes ink, and further characterized by the step of transferring said solution from those areas of said material to which said solution adheres to a document.
Claim 9
Dependent Claim
21 words
The method of claim 4 wherein said energy is formed by projecting light transmitted through a transparent medium onto said material.
Claim 10
Dependent Claim
19 words
The method of claim 4 wherein said energy is a laser beam directed onto selected areas of said material.
Claim 11
Dependent Claim
21 words
The method of claim 4 wherein said energy is in the form of heat applied to selected areas of said material.
Claim 12
Dependent Claim
27 words
The system as defined in claim 4 wherein said amorphous semiconductor material is capable of being reversibly switched between said states in response to energy applied thereto.
Claim 13
Dependent Claim
75 words
The method of claim 13 wherein said amorphous material is initially in the generally amorphous state and said pattern of energy switches said material to the more ordered statE, and further characterized by the addition of the step of applying energy to at least a portion of said material residing in said more ordered state to return said portion to the generally amorphous state, whereby said material may be re-used to form another image thereon.
Claim 14
Dependent Claim
75 words
The method of claim 13 wherein said amorphous material initially resides in the more ordered state and said pattern of energy changes said material to the generally amorphous state, and further characterized by the addition of the step of applying energy to at least a portion of said material residing in the generally amorphous state to return said portion to the more ordered state, whereby said material may be re-used to form another image thereon.
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |