US4247213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platen for printing devices
Assignee: US Philips Corp
•
Filing: 1977-05-02
•
Granted: 1981-01-27
•
Expires: 1997-05-02
Abstract
Abstract A noise-reducing hollow platen having a hard external tube filled with steel or lead spheres.
Inventors
- 👤 Horst Wurscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/02; B41J11/04; B41J11/053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A hollow platen for impact printing devices, containing sound-absorbing material for reducing impact noise, wherein the absorbing material consists of a multiplicity of small metal spheres having a high specific gravity, said platen comprises a tube made of hard material and enclosing an interior space, said space being filled with said spheres.
Claim 2
Dependent Claim
52 words
A hollow platen for impact printing devices, containing sound-absorbing material for reducing impact noise, wherein the absorbing material consists of a multiplicity of small metal spheres having a high specific gravity, said platen comprises a tube made of hard material and enclosing an interior space, said space being filled with said spheres.
Claim 3
Dependent Claim
27 words
A platen as claimed in claim 1 wherein said tube is made of steel, the outer impact surface of the platen being the surface of the steel.
Claim 4
Dependent Claim
14 words
A platen as claimed in claim 2 wherein the metal spheres are steel spheres.
Claim 5
Dependent Claim
14 words
A platen as claimed in claim 2 wherein the metal spheres are lead spheres.
Claim 6
Dependent Claim
21 words
A platan as claimed in claim 2 wherein the spheres have a diameter of from approximately 0.5 mm to 1.5 mm.
Claim 7
Dependent Claim
27 words
A platen as claimed in claim 1, comprising two concentric steel tubes arranged one inside the other, the interior space being an annular space between said tubes.
References Cited (Backward Citations)
US503534A
Cited
US960679A
Cited
US1452824A
Cited
US1721385A
Cited
US1693533A
Cited
US3057450A
Cited
US3775087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |