US4468677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing apparatus
Assignee: Unisys Corp
•
Filing: 1982-08-26
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Granted: 1984-08-28
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Expires: 2002-08-26
Abstract
Abstract A low-cost printer is provided for use with data processing equipment. A light-shielding retainer provides a substantially continuous sheet supply of printing medium including a conductive-resistant coating formed in strips which is light sensitive and heat developed. The medium is moved past a processing station. A first portion of the station includes an array of light emitting elements and a second portion includes an element for heating the medium sufficient for developing the medium thus visibly exposing and fixing the characters on the medium.
Inventors
- 👤 Arnold Schonfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:17
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/004; B41J2/00; B41J2/435; B41J2/447; B41J2/45
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A printing apparatus comprising: means for retaining a substantially continuous supply of printing medium, said medium being of a construction sufficient to be light sensitive and heat developed, said printing medium having opposed surfaces, one of said surfaces including a conductive-resistant coating formed in a plurality of strips; a print processing station; means for moving said medium from said retainer past said station; means operable for printing by exposing said moving medium to an image produced by an array of light emitting elements and means operable for incrementally developing said strips of said medium in response to operation of said light emitting elements for fixing said image on said medium, said means for developing including a pair of electrical contacts urged into engagement with said medium.
Claim 2
Dependent Claim
126 words
A printing apparatus comprising: means for retaining a substantially continuous supply of printing medium, said medium being of a construction sufficient to be light sensitive and heat developed, said printing medium having opposed surfaces, one of said surfaces including a conductive-resistant coating formed in a plurality of strips; a print processing station; means for moving said medium from said retainer past said station; means operable for printing by exposing said moving medium to an image produced by an array of light emitting elements and means operable for incrementally developing said strips of said medium in response to operation of said light emitting elements for fixing said image on said medium, said means for developing including a pair of electrical contacts urged into engagement with said medium.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 including; means for shielding said medium from light.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 wherein said means for retaining said supply of medium includes a light shielding container detachably connected to said apparatus.
Claim 5
Dependent Claim
46 words
The apparatus of claim 1 wherein said means for moving includes a pair of opposed rolls, said medium being between said rolls, and at least one of said rolls being in resilient contact with the other of said rolls and in gripping engagement with said medium.
Claim 6
Dependent Claim
17 words
The apparatus of claim 4 including: means operably connected for driving at least one of said rolls.
Claim 7
Dependent Claim
14 words
The apparatus of claim 5 wherein said rolls are step driven by a solenoid.
Claim 8
Dependent Claim
38 words
The apparatus of claim 1 including: means operable for timing actuation of said developing means in response to actuation of said exposing means, said means including a timing member electrically interconnecting said developing means and said exposing means.
References Cited (Backward Citations)
US3452181A
Cited
US3827962A
Cited
US3952311A
Cited
US3952311B1
Cited
US3832488A
Cited
US4033263A
Cited
US4090206A
Cited
US4177469A
Cited
US4193078A
Cited
US4213136A
Cited
US4335967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |