Patent US3896919A successfully refreshed from Google Patents.
US3896919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double band type carrier
Assignee: Unisys Corp
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Filing: 1973-12-21
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Granted: 1975-07-29
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Expires: 1993-12-21
Abstract
Abstract An improved type carrier for an impact printer of the rotating typewheel class includes a typewheel having first and second bands of type characters, each band of which is arranged in a helix about a spherical periphery of the typewheel. Each band lies in a plane, and the planes of the bands are set at a small acute angle to each other. The typewheel is secured to a spherical portion about which it is deflected in order to align a selected one of said bands with a print hammer in response to a control signal signifying that a desired character on the selected band is to be imprinted on a record medium.
Inventors
- 👤 Ronald W F Hutley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:16
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/32; B41J1/34; Y; Y10; Y10S; Y10S400/00; Y10S400/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
An impact printer for representing characters on a record medium, comprising: a continuously rotating typewheel having an axis of rotation and having a generally spherically shaped face section perpendicular to the radii of said typewheel, said typewheel having first and second bands of type characters, at least some of the type characters on said first band being different in type than the type characters on said second band, each band being arranged on the face of said typewheel in a circular path extending about the periphery of said typewheel, said circular path defining a type plane, said type planes intersecting each other at two points on the wheel and crossing a projection of the axis of the typewheel at a predetermined angle when its typeband is in printing position and at an angle other than said predetermined angle when its typeband is not in printing position; a hub keyed to said typewheel, said typewheel being deflectable about the axis of said hub, print actuator means aligned with said typewheel; means for translating said typewheel and said print actuator means across a row of said record medium, and means for deflecting said typewheel to align a selected one of said bands with said print actuator means in response to a control signal signifying that a desired character on said selected band is to be imprinted on said record medium.
Claim 2
Dependent Claim
228 words
An impact printer for representing characters on a record medium, comprising: a continuously rotating typewheel having an axis of rotation and having a generally spherically shaped face section perpendicular to the radii of said typewheel, said typewheel having first and second bands of type characters, at least some of the type characters on said first band being different in type than the type characters on said second band, each band being arranged on the face of said typewheel in a circular path extending about the periphery of said typewheel, said circular path defining a type plane, said type planes intersecting each other at two points on the wheel and crossing a projection of the axis of the typewheel at a predetermined angle when its typeband is in printing position and at an angle other than said predetermined angle when its typeband is not in printing position; a hub keyed to said typewheel, said typewheel being deflectable about the axis of said hub, print actuator means aligned with said typewheel; means for translating said typewheel and said print actuator means across a row of said record medium, and means for deflecting said typewheel to align a selected one of said bands with said print actuator means in response to a control signal signifying that a desired character on said selected band is to be imprinted on said record medium.
Claim 3
Dependent Claim
26 words
The invention defined in claim 1 further comprising a shaft aligned across a row of said record medium, said hub being also keyed to said shaft.
Claim 4
Dependent Claim
27 words
The invention defined in claim 1 wherein said hub has a spherical portion on which said typewheel is secured to prevent radial motion relative to said hub.
Claim 5
Dependent Claim
28 words
The invention defined in claim 3 wherein said means for deflecting said typewheel includes a forked lever for deflecting said typewheel about said spherical portion of said hub.
Claim 6
Dependent Claim
38 words
The invention defined in claim 4 and further comprising first and second guide plates secured to said forked lever, said first and second guideplates being adjacent respective sides of said typewheel and being bored to surround said hub.
References Cited (Backward Citations)
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |