Patent US4419024A successfully refreshed from Google Patents.
US4419024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon dioxide intermediate layer in thermal transfer medium
Assignee: IBM Information Products Corp
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Filing: 1981-12-22
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Granted: 1983-12-06
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Expires: 2001-12-22
Abstract
Abstract Disclosed is a thermal transfer medium which comprises a mixture of a thermosetting polyimide, a thermoplastic polyimide, and graphite. It has a steel support layer and an intermediate layer of silicon dioxide. An outer layer on the steel is the thermal ink. The mixture is applied as a dispersion with a precursor of the thermosetting polyimide. The ribbon may be recoated at the typing station by applying a hot-melt of the ink.
Inventors
- 👤 Patsy A. Bowlds
- 👤 Bruce M. Cassidy
- 👤 Arthur E. Graham
- 👤 Robert J. Huljak
- 👤 Donald W. Stafford
- 👤 Deh C. Tao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; B41J; B41J31/00; B41J31/05; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
34 words
A transfer medium for non-impact thermal transfer printing comprising a thermal transfer layer, a resistive layer, and a layer of silicon dioxide on said resistive layer between said resistive layer and said transfer layer.
Claim 2
Dependent Claim
34 words
A transfer medium for non-impact thermal transfer printing comprising a thermal transfer layer, a resistive layer, and a layer of silicon dioxide on said resistive layer between said resistive layer and said transfer layer.
Claim 3
Dependent Claim
26 words
The transfer medium as in claim 1 in which the thickness of said layer of silicon dioxide is in the order of magnitude of 80 angstroms.
Claim 4
Dependent Claim
20 words
The transfer medium as in claim 1 which comprises a layer of highly conductive material contacting said silicon dioxide layer.
Claim 5
Dependent Claim
20 words
The transfer medium as in claim 2 which comprises a layer of highly conductive material contacting said silicon dioxide layer.
Claim 6
Dependent Claim
20 words
The transfer medium as in claim 3 in which said layer of highly conductive material is a metal support layer.
Claim 7
Dependent Claim
20 words
The transfer medium as in claim 4 in which said layer of highly conductive material is a metal support layer.
Claim 8
Dependent Claim
25 words
The transfer medium as in claim 5 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
Claim 9
Dependent Claim
25 words
The transfer medium as in claim 6 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
Claim 10
Dependent Claim
36 words
A transfer medium for non-impact thermal printing comprising a resistive layer, a silicon dioxide layer contacting said resistive layer, and a highly conductive layer contacting said silicon dioxide layer on the side opposite said resistive layer.
Claim 11
Dependent Claim
36 words
A transfer medium for non-impact thermal printing comprising a resistive layer, a silicon dioxide layer contacting said resistive layer, and a highly conductive layer contacting said silicon dioxide layer on the side opposite said resistive layer.
Claim 12
Dependent Claim
26 words
The transfer medium as in claim 9 in which the thickness of said layer of silicon dioxide is in the order of magnitude of 80 angstroms.
Claim 13
Dependent Claim
15 words
The transfer medium as in claim 9 in which said highly conductive layer is metal.
Claim 14
Dependent Claim
15 words
The transfer medium as in claim 10 in which said highly conductive layer is metal.
Claim 15
Dependent Claim
13 words
The transfer medium as in claim 11 in which said metal is steel.
Claim 16
Dependent Claim
13 words
The transfer medium as in claim 12 in which said metal is steel.
Claim 17
Dependent Claim
25 words
The transfer medium as in claim 13 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
Claim 18
Dependent Claim
25 words
The transfer medium as in claim 14 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
Claim 19
Dependent Claim
25 words
The transfer medium as in claim 9 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 20
Dependent Claim
25 words
The transfer medium as in claim 10 also comprising a heat-flowable marking material contacting said conducting layer on the side opposite said silicon dioxide layer.
Claim 21
Dependent Claim
25 words
The transfer medium as in claim 15 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 22
Dependent Claim
25 words
The transfer medium as in claim 16 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 23
Dependent Claim
34 words
A thermal transfer medium having metal layer, a silicon dioxide layer deposited from a gas state on said metal layer, and a resistive layer deposited on said silicon dioxide layer opposite said metal layer.
Claim 24
Dependent Claim
34 words
A thermal transfer medium having metal layer, a silicon dioxide layer deposited from a gas state on said metal layer, and a resistive layer deposited on said silicon dioxide layer opposite said metal layer.
Claim 25
Dependent Claim
25 words
The transfer medium as in claim 21 in which the thickness of said silicon dioxide layer is in the order of magnitude of 80 angstroms.
Claim 26
Dependent Claim
17 words
The transfer medium as in claim 21 in which the metal of said metal layer is steel.
Claim 27
Dependent Claim
17 words
The transfer medium as in claim 22 in which the metal of said metal layer is steel.
Claim 28
Dependent Claim
25 words
The transfer medium as in claim 21 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 29
Dependent Claim
25 words
The transfer medium as in claim 22 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 30
Dependent Claim
25 words
The transfer medium as in claim 23 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 31
Dependent Claim
25 words
The transfer medium as in claim 24 also comprising a heat-flowable marking material contacting said conductive layer on the side opposite said silicon dioxide layer.
Claim 32
Dependent Claim
25 words
The transfer medium as in claim 21 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
Claim 33
Dependent Claim
25 words
The transfer medium as in claim 22 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive particulate material.
Claim 34
Dependent Claim
25 words
The transfer medium as in claim 27 in which said resistive layer is a polyimide binder and an electrically significant amount of conductive, particulate material.
References Cited (Backward Citations)
US2713822A
Cited
US2962404A
Cited
US3383235A
Cited
US3391023A
Cited
US3744611A
Cited
GB1469392A
Cited
US4196246A
Cited
US4103066A
Cited
GB2022019A
Cited
US4236834A
Cited
US4253775A
Cited
US4309117A
Cited
US4269892A
Cited
US4345845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |