US3691949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure cylinder for direct plate printing machines
Assignee: KBA Notasys SA
•
Filing: 1970-10-27
•
Granted: 1972-09-19
•
Expires: 1990-10-27
Abstract
Abstract A pressure cylinder for a direct plate printing machine comprises a steel cylinder having a peripheral coating of plastic material. The coating has a total thickness of 0.4 mm to 1 mm and comprises an outer layer of polyurethane having a thickness of about 2 mm and a hardness of Shore D 40* to D 60* and at least one inner layer of polyurethane having a hardness of Shore D 80* to D 90*.
Inventors
- 👤 Gualtiero Giori
- 👤 Daniel Beaune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/08; B41F13/18; Y; Y10; Y10S; Y10S428/00; Y10S428/909
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
A pressure cylinder according to claim 1, in which said outer and inner layers are of polyurethane.
Claim 2
Dependent Claim
26 words
A pressure cylinder according to claim 2, in which said inner layer contains stiffening material selected from the group consisting of carbon black and calcium carbonate.
Claim 3
Dependent Claim
27 words
A pressure cylinder according to claim 3, in which the amount of said stiffening material in said inner layer is between 5 and 15 percent by weight.
Claim 4
Dependent Claim
16 words
A pressure cylinder according to claim 1, in which said outer layer has a smooth surface.
Claim 5
Dependent Claim
28 words
A pressure cylinder according to claim 1, in which said coating of plastic material is bonded on sheet steel fixed on the peripheral surface of said steel cylinder.
Claim 6
Dependent Claim
21 words
A pressure cylinder according to claim 1, in which said coating of plastic material is bonded directly onto said steel cylinder.
Claim 7
Dependent Claim
20 words
A pressure cylinder according to claim 1, in which said inner layer has a greater thickness than said outer layer.
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |