US3701995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing hammer arrangement
Assignee: TDK Micronas GmbH
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Filing: 1970-07-24
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Granted: 1972-10-31
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Expires: 1990-07-24
Abstract
Abstract An arrangement for printing hammers wherein a plurality of pivotably mounted hammers are provided, the hammers being divided into a plurality of sets, each hammer of a set having fist and second legs which are angularly displaced from one another by a fixed amount, this fixed amount being different for each set. The first leg of each hammer is positioned adjacent a recording device and the second leg of each hammer is positioned adjacent a selectively actuable electromagnet. The actuation of an electromagnet causes the movement of the associated hammer thereby causing the recording of information. In one embodiment the recording device includes a platen, paper and an inked ribbon provided adjacent the first legs of the hammers, the first legs striking the ribbon thereby imprinting a mark on the paper. In another embodiment the recording device includes a magnetizable drum and the first leg of each hammer is aligned with a magnetic actuator, the movement of the first leg causing movement of the magnetic actuator, thereby providing a magnetic mark on the magnetizable drum.
Inventors
- 👤 Karel Jan Staller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:30
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/38; B41J2/00; B41J2/385; B41J2/43
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
Printing apparatus comprising: a printing plane; a multiplicity of pivotably mounted hammers positioned to strike said printing plane, said multiplicity of hammers divided into a plurality of sets of movable hammers, each hammer of a set having first and second legs which are angularly displaced one from another by a predetermined amount, said predetermined amount being different for each set, the first leg of each hammer of each set being located in a plane adjacent said printing plane; means positioned adjacent the second leg leg of each of said hammers for causing the first leg thereof to impinge upon said printing plane; recording means having a magnetizable surface disposed in said printing plane; and a plurality of magnetic activating means, one associated with each hammer, located between said magnetizable surface and said hammers, the movement of a hammer moving the associated activating means to provide a magnetized point on said surface, said plurality of activating means comprising: an elongated magnet extending the length of said magnetizable surface; and a plurality of magnetic rods disposed along the length of said elongated magnet, each of said rods connected at one end to said elongated magnet, the other end of each of said rods located between its associated hammer and said magnetizable surface so that said other end of each of said rods moves towards said surface in response to the movement of its associated hammer.
Claim 2
Dependent Claim
233 words
Printing apparatus comprising: a printing plane; a multiplicity of pivotably mounted hammers positioned to strike said printing plane, said multiplicity of hammers divided into a plurality of sets of movable hammers, each hammer of a set having first and second legs which are angularly displaced one from another by a predetermined amount, said predetermined amount being different for each set, the first leg of each hammer of each set being located in a plane adjacent said printing plane; means positioned adjacent the second leg leg of each of said hammers for causing the first leg thereof to impinge upon said printing plane; recording means having a magnetizable surface disposed in said printing plane; and a plurality of magnetic activating means, one associated with each hammer, located between said magnetizable surface and said hammers, the movement of a hammer moving the associated activating means to provide a magnetized point on said surface, said plurality of activating means comprising: an elongated magnet extending the length of said magnetizable surface; and a plurality of magnetic rods disposed along the length of said elongated magnet, each of said rods connected at one end to said elongated magnet, the other end of each of said rods located between its associated hammer and said magnetizable surface so that said other end of each of said rods moves towards said surface in response to the movement of its associated hammer.
Claim 3
Dependent Claim
19 words
Printing apparatus, according to claim 1, wherein said means positioned adjacent each second leg comprises a plurality of electromagnets.
Claim 4
Dependent Claim
26 words
Printing apparatus, according to claim 1, wherein each of said rods is flexible, returning to its original position after it has been moved by said hammer.
Claim 5
Dependent Claim
38 words
Printing apparatus, according to claim 1, wherein said elongated magnet is L-shaped, one leg of the L extending along the longitudinal axis of each of said rods, thereby effecting the return of the rod to its original position.
Claim 6
Dependent Claim
30 words
Printing apparatus, according to claim 1, wherein each hammer of a set is separated from other hammers of the same set by at least one hammer of a different set.
Claim 7
Dependent Claim
62 words
Printing apparatus, according to claim 1, further comprising: a fixed frame to which said multiplicity of hammers are mounted and to which said means positioned adjacent each second leg are mounted; and return means coupled between said frame and each hammer for returning each hammer to its original position after it has been moved by said means positioned adjacent each second leg.
Claim 8
Dependent Claim
24 words
Printing apparatus, according to claim 6, wherein said return means comprises a plurality of springs, each spring coupled between said frame and one hammer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |