Patent US3649810A successfully refreshed from Google Patents.
US3649810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot screen printing machine
Assignee: Fujifilm Holdings Corp
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Filing: 1970-08-07
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Granted: 1972-03-14
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Expires: 1990-08-07
Abstract
Abstract A practical and useful hot screen printing machine having at least one rotatable cylindrical printing drum comprising a flexible plane heater on the outer surface thereof and an electrical insulating layer surrounding the plane heater.
Inventors
- 👤 Masayoshi Tsuboi
- 👤 Tsuneo Komura
- 👤 Sigeru Tezuka
- 👤 Asaji Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:39
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/12; B41L; B41L13/00; B41L13/04; B41L13/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A hot screen printing machine comprising at least one rotatable cylindrical drum; a flexible sheet of electrically conductive material wrapped around the drum and capable of generating heat comprising a heat resisting polymer film containing a material selected from the group consisting of carbon black, grafted carbon, aluminum powder, silver powder, and copper powder; an electrically insulating layer on the outside surface of the drum and above the sheet of electrically conductive material and formed of a material selected from the group consisting of polyethylene terephthalate film, cellulose triacetate film, felt and sponge, and means for supplying electricity to the heat generating flexible sheet including a pair of electrodes positioned parallel to the drum and extending across the surface of the flexible sheet beneath the insulating layer.
Claim 2
Dependent Claim
127 words
A hot screen printing machine comprising at least one rotatable cylindrical drum; a flexible sheet of electrically conductive material wrapped around the drum and capable of generating heat comprising a heat resisting polymer film containing a material selected from the group consisting of carbon black, grafted carbon, aluminum powder, silver powder, and copper powder; an electrically insulating layer on the outside surface of the drum and above the sheet of electrically conductive material and formed of a material selected from the group consisting of polyethylene terephthalate film, cellulose triacetate film, felt and sponge, and means for supplying electricity to the heat generating flexible sheet including a pair of electrodes positioned parallel to the drum and extending across the surface of the flexible sheet beneath the insulating layer.
Claim 3
Dependent Claim
42 words
A hot screen printing machine as in claim 1, where the means for supplying electricity further includes lead wires and brush type current collector means connected to the electrodes and positioned at one end of the drum radially inward of the electrodes.
Claim 4
Dependent Claim
23 words
A hot screen printing machine as in claim 2, where the thickness of the flexible sheet is between 20 microns and 2 mm.
Claim 5
Dependent Claim
38 words
A hot screen printing machine as in claim 3, where the temperature of the flexible sheet will remain within 3* C. at steady state and the electrodes will be positioned approximately 25 cm. apart on the flexible sheet.
References Cited (Backward Citations)
US2679572A
Cited
US3469077A
Cited
US3401439A
Cited
US3520747A
Cited
US3520747B1
Cited
US3310655A
Cited
US3471683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |