US3926293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual carriage impact printer with belt drive
Assignee: Facit AB
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Filing: 1974-12-19
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Granted: 1975-12-16
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Expires: 1994-12-19
Abstract
Abstract An impact printing device in which two carriages are provided with complementary printing elements that are disposed on either side of the recording medium, such as paper. Each carriage is operatively connected to an elongated drive member and is movable thereby in the length direction of said drive members, while the paper moves in increments at right angles thereto. The carriages are arranged to be immovable with respect to each other and the driving means are belts having coupling elements that compensate for variations in belt lengths.
Inventors
- 👤 John Erik Ljungberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:10
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J2/00; B41J2/485; B41J2/495
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
An impact printing device comprising in combination two spaced carriages provided with printing means, a recording medium passing between said spaced carriages, an elongated driving means for each carriage, means securing the respective driving means to each carriage, said carriages being movable in the length direction of said driving means, said recording means being adapted to be moved incrementally in a direction substantially perpendicular to the direction of movement of said carriages, said drive members being a pair of belts, coupling means interconnecting the free ends of said belts, one of said coupling means being a fixed coupling member interconnecting respective free ends of said belts and the other coupling means being a yoke interconnecting second respective free ends of said belts, and a link arm connecting said fixed coupling member and said yoke whereby variations in lengths of the two belts can be compensated for.
Claim 2
Dependent Claim
146 words
An impact printing device comprising in combination two spaced carriages provided with printing means, a recording medium passing between said spaced carriages, an elongated driving means for each carriage, means securing the respective driving means to each carriage, said carriages being movable in the length direction of said driving means, said recording means being adapted to be moved incrementally in a direction substantially perpendicular to the direction of movement of said carriages, said drive members being a pair of belts, coupling means interconnecting the free ends of said belts, one of said coupling means being a fixed coupling member interconnecting respective free ends of said belts and the other coupling means being a yoke interconnecting second respective free ends of said belts, and a link arm connecting said fixed coupling member and said yoke whereby variations in lengths of the two belts can be compensated for.
Claim 3
Dependent Claim
31 words
An impact printing device as claimed in claim 1 further comprising a pair of drive wheels for said drive belts, the latter passing over said wheels to form two endless loops.
Claim 4
Dependent Claim
17 words
An impact printing device as claimed in claim 2 wherein said recording medium is a pressure-sensitive paper.
Claim 5
Dependent Claim
36 words
An impact printing device as claimed in claim 3 further comprising edge guides located on opposite edges of said paper in order to ensure that said paper is positioned and selectively moved between said drive belts.
Claim 6
Dependent Claim
58 words
An impact printing device as claimed in claim 1, wherein said printing means constitutes a rotatable helical wheel provided with cam surfaces mounted on one carriage, a print hammer mounted on the other carriage and adapted to co-act with said cam surfaces, the recording medium being arranged to be moved between said helical wheel and said print hammer.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |