US4338034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Print wheel positioning means
Assignee: Xerox Corp
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Filing: 1980-04-18
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Granted: 1982-07-06
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Expires: 2000-04-18
Abstract
Abstract An impact printer of the type wherein a print wheel is rotated to a print position by a drive motor, and printing is caused by impacting a particular character on the print wheel by a print hammer. The print wheel has coarse alignment and fine alignment means formed in the print wheel. The coarse alignment means is used to drive the wheel, and the fine alignment means is utilized during hammer impact.
Inventors
- 👤 Egon S. Babler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:17
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A print wheel aligning apparatus comprising a print wheel mounted for rotation, said print wheel having coarse alignment means and fine alignment means thereon, drive means for rotating said print wheel, said drive means mounted for movement into and out of contact with said coarse alignment means, means for moving said drive means into and out of contact with said coarse alignment means, fixed fine alignment means positioned to contact said fine alignment means on said print wheel and provide fine alignment thereof, a housing structure, said fixed fine alignment means being fixed in both axial and rotative directions relative to said housing, and means to urge said print wheel fine alignment means into contact with said fixed fine alignment means when said drive means is moved out of contact with said coarse alignment means.
Claim 2
Dependent Claim
135 words
A print wheel aligning apparatus comprising a print wheel mounted for rotation, said print wheel having coarse alignment means and fine alignment means thereon, drive means for rotating said print wheel, said drive means mounted for movement into and out of contact with said coarse alignment means, means for moving said drive means into and out of contact with said coarse alignment means, fixed fine alignment means positioned to contact said fine alignment means on said print wheel and provide fine alignment thereof, a housing structure, said fixed fine alignment means being fixed in both axial and rotative directions relative to said housing, and means to urge said print wheel fine alignment means into contact with said fixed fine alignment means when said drive means is moved out of contact with said coarse alignment means.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein said coarse alignment means is radial teeth formed on said print wheel and said drive means includes matching radial teeth for mating with said coarse alignment means radial teeth.
Claim 4
Dependent Claim
39 words
The apparatus of claim 2 wherein said print wheel fine alignment means is radial teeth formed on said print wheel, and said fixed fine alignment means is radial teeth for mating with said print wheel fine alignment radial teeth.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 wherein said print wheel is mounted for rotation within a cartridge, and said cartridge has said fixed fine alignment means formed thereon.
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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |