US3975742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printing-anti-stick mechanism
Assignee: Honeywell Inc
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Filing: 1975-09-25
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Granted: 1976-08-17
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Expires: 1995-09-25
Abstract
Abstract A thermal recording instrument has an incrementally advanced thermal web. Selectively energized heating elements record alphanumeric information on the web and a logic circuit insures that the web will advance while the elements are energized in order to prevent sticking.
Inventors
- 👤 Thomas P. Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:52
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/10; B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; G01D9/00; G01D9/28; G01D9/285
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A thermal recording instrument comprising in combination: a motor for incrementally advancing a thermally responsive web through a predetermined distance in response to a paper advance signal; means for generating said paper advance signal; a printhead including a plurality of selectively energizable print elements whose temperature rises above ambient temperature when energized; means for mounting said printhead so that said printhead is in continuous contact with said web during operation of said instrument; means for generating a data signal; means for generating an anticipatory signal a predetermined interval prior to the paper advance signal; and means responsive to said anticipatory signal and said data signal to selectively energize said elements for a predetermined interval which is sufficient in duration that said web commences advancing before said elements return to ambient temperature.
Claim 2
Dependent Claim
131 words
A thermal recording instrument comprising in combination: a motor for incrementally advancing a thermally responsive web through a predetermined distance in response to a paper advance signal; means for generating said paper advance signal; a printhead including a plurality of selectively energizable print elements whose temperature rises above ambient temperature when energized; means for mounting said printhead so that said printhead is in continuous contact with said web during operation of said instrument; means for generating a data signal; means for generating an anticipatory signal a predetermined interval prior to the paper advance signal; and means responsive to said anticipatory signal and said data signal to selectively energize said elements for a predetermined interval which is sufficient in duration that said web commences advancing before said elements return to ambient temperature.
Claim 3
Dependent Claim
34 words
A thermal recording instrument as in claim 1 further including a heated stylus in continuous contact with said web and means for moving said stylus transversely to the direction of movement of said web.
Claim 4
Dependent Claim
30 words
A thermal recording instrument as in claim 1 wherein said print elements comprise a linear array of elements respectively capable of producing a single dot on said web when energized.
Claim 5
Dependent Claim
30 words
A thermal recording instrument as in claim 2 wherein said print elements comprise a linear array of elements respectively capable of producing a single dot on said web when energized.
Claim 6
Dependent Claim
25 words
A thermal recording instrument as in claim 1 wherein said web advance signal commences prior to the predetermined interval for which said elements are heated.
Claim 7
Dependent Claim
25 words
A thermal recording instrument as in claim 2 wherein said web advance signal commences prior to the predetermined interval for which said elements are heated.
References Cited (Backward Citations)
US3874493A
Cited
US3913091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |