Patent US4252448A successfully refreshed from Google Patents.
US4252448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head cleaning apparatus for electroresistive printer
Assignee: Computer Printers International Inc
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Filing: 1979-04-03
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Granted: 1981-02-24
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Expires: 1999-04-03
Abstract
Abstract A non-impact printing system in which a multi-wire head collects debris has an arrangement for cleaning the head with a brush by sweeping the head over the brush in a first direction and immediately sweeping the head back over the brush in the reverse direction, while simultaneously pulling the head away from the brush. Certain aspects of the preferred embodiment disclosed herein include inventive subject matter set forth in the copending application of Robert Burdett Taggart, Ser. No. 26,647, filed Apr. 3, 1979, entitled, "Printing Apparatus Drive System".
Inventors
- 👤 Richard E. Johnson
- 👤 Robert B. Taggart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/17
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
In a non-impact printing system having a multi-wire head for writing on a medium resulting in the collection of debris on said head wires, a method for cleaning said head with a brush comprising sweeping said head over said brush in a first direction, and immediately sweeping said head back over said brush in the reverse direction while simultaneously pulling said head away from said brush.
Claim 2
Dependent Claim
66 words
In a non-impact printing system having a multi-wire head for writing on a medium resulting in the collection of debris on said head wires, a method for cleaning said head with a brush comprising sweeping said head over said brush in a first direction, and immediately sweeping said head back over said brush in the reverse direction while simultaneously pulling said head away from said brush.
Claim 3
Dependent Claim
23 words
The method of claim 1 further comprising pivotally biasing said brush in a direction generally perpendicular to the sweeping directions of said head.
Claim 4
Dependent Claim
31 words
The method of claim 2 wherein the pivot point is offset from said brush to pivot the brush in an arc away from the oncoming head moving in said first direction.
Claim 5
Independent Claim
28 words
The method of claims 1, 2, or 3 further comprising providing a brush having bristle diameters larger than the smallest wire to wire spacing of said head wires.
Claim 6
Dependent Claim
69 words
In a non-impact printing system having a multi-wire head for writing on a medium resulting in the collection of debris on said head wires, a system for cleaning said head comprising a brush, means for sweeping said head over said brush in a first direction, and means for immediately sweeping said head back over said brush in the reverse direction while simultaneously pulling said head away from said brush.
Claim 7
Dependent Claim
69 words
In a non-impact printing system having a multi-wire head for writing on a medium resulting in the collection of debris on said head wires, a system for cleaning said head comprising a brush, means for sweeping said head over said brush in a first direction, and means for immediately sweeping said head back over said brush in the reverse direction while simultaneously pulling said head away from said brush.
Claim 8
Dependent Claim
25 words
The combination of claim 5 further comprising means for pivotally biasing said brush in a direction generally perpendicular to the sweeping directions of said head.
Claim 9
Dependent Claim
31 words
The combination of claim 6 wherein the pivot point is offset from said brush to pivot the brush in an arc away from the oncoming head moving in said first direction.
Claim 10
Dependent Claim
26 words
The combination of claims 5, 6, or 7 wherein the brush bristle diameters are larger than the smallest wire to wire spacing of said head wires.
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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |