US3759174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Print hammer striking moving type at an angle to compensate for frictional force
Assignee: US Philips Corp
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Filing: 1971-05-21
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Granted: 1973-09-18
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Expires: 1991-05-21
Abstract
Abstract A printing device comprising a type support and one or more hammers cooperating therewith. Each hammer has an impact beam which is arranged so that it strikes the face of the type support at an angle in such manner that the reaction force exerted on the impact beam during a stroke of the impact beam against said face has a component, in addition to a component in the direction of the impact beam equal to the frictional force exerted on the impact beam.
Inventors
- 👤 M Quirijnen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:23
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/02; B41J9/127
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A printing device comprising a continuously moving type support and at least one print hammer arranged for cooperation therewith, said print hammer comprising a base member, a rigid impact beam arranged for movement toward and away from said type support, one end of said impact beam forming an impact surface for engagement with said type support, thereby producing a frictional force on said impact beam at the moment of engagement and a reaction force, and support members carried by said base for supporting said impact beam so that upon movement thereof into engagement with said type support said impact beam will strike said type support at an angle so that said reaction force has a first component in the direction of said impact beam, and a second component being substantially equal and opposite to said frictional force.
Claim 2
Dependent Claim
137 words
A printing device comprising a continuously moving type support and at least one print hammer arranged for cooperation therewith, said print hammer comprising a base member, a rigid impact beam arranged for movement toward and away from said type support, one end of said impact beam forming an impact surface for engagement with said type support, thereby producing a frictional force on said impact beam at the moment of engagement and a reaction force, and support members carried by said base for supporting said impact beam so that upon movement thereof into engagement with said type support said impact beam will strike said type support at an angle so that said reaction force has a first component in the direction of said impact beam, and a second component being substantially equal and opposite to said frictional force.
Claim 3
Dependent Claim
53 words
The printing device according to claim 1 wherein said type support is a rotating type roller having printing characters on the surface thereof, and wherein said impact beam is supported by said support members in front of the plane passing through the axis of said type roller and parallel to said impact beam.
Claim 4
Dependent Claim
41 words
The printing device according to claim 1 wherein said type support is a continuously moving endless band, and wherein said impact beam is supported to form an acute angle with the part of said band which has passed said impact beam.
References Cited (Backward Citations)
US3128694A
Cited
US3228325A
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US3292531A
Cited
US3309989A
Cited
US3353482A
Cited
US3623427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |