US4480935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing type drum
Assignee: Canon Inc
•
Filing: 1983-06-09
•
Granted: 1984-11-06
•
Expires: 2003-06-09
Abstract
Abstract There is disclosed an integrated cylindrical formation of plural lines of a printing type belt in such a printing type drum as contains a hammer unit therein, has plural lines of printing type belts installed round the periphery of the cylindrically formed drum body and supplied printing ink to the types by pressing an ink roller against the printing type belts.
Inventors
- 👤 Hitoshi Kurihara
- 👤 Toru Wakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:10
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A printing type drum, comprising: a cylindrical drum body having a circumferential surface with a plurality of through holes arranged in a plurality of circumferential lines along the surface; and an elastic type belt being formed of a plurality of thin strips, each strip having at least one ridge, with the ridges of adjacent strips placed over and under each other, said elastic type belt having a plurality of type blocks arranged on one side surface thereof and having a plurality of projections on the other side surface thereof, each projection corresponding to a separate one of said plurality of type blocks, said plurality of projections being positioned in said through holes when said plurality of strips is wound round said drum body.
Claim 2
Dependent Claim
123 words
A printing type drum, comprising: a cylindrical drum body having a circumferential surface with a plurality of through holes arranged in a plurality of circumferential lines along the surface; and an elastic type belt being formed of a plurality of thin strips, each strip having at least one ridge, with the ridges of adjacent strips placed over and under each other, said elastic type belt having a plurality of type blocks arranged on one side surface thereof and having a plurality of projections on the other side surface thereof, each projection corresponding to a separate one of said plurality of type blocks, said plurality of projections being positioned in said through holes when said plurality of strips is wound round said drum body.
Claim 3
Dependent Claim
31 words
A printing type drum according to claim 1, wherein adjacent strips are positioned so that their respective row of type blocks are in a staggered arrangement with respect to one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |