Patent US4464667A successfully refreshed from Google Patents.
US4464667A
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Assignee: EIDU PONT DE NEMOURS AND Co WILMINGTON
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Filing: 1982-07-15
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Granted: 1984-08-07
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Expires: 2002-07-15
Abstract
Abstract Improved resolution of magnetic toner image on a substrate is obtained by removing excess toner from a recording member containing parallel lines of flux by passing an air flow substantially parallel to the premagnetization line pattern to remove excess toner prior to toner transfer to the substrate.
Inventors
- 👤 Charles B. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
G; G03; G03G; G03G19/00; G03G15/00; G03G15/06; G03G15/08; G03G15/095
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A process for obtaining improved resolution of a magnetic toner image applied from a toned recording member containing a pattern of parallel magnetic lines in its image areas by contact transfer of the toner image from the recording member to a substrate surface wherein the improvement comprises removing excess toner from the toned recording member prior to toner image transfer to the substrate surface by an air flow passing across the surface of the recording member whereby the direction of air flow is substantially parallel to the magnetic line pattern in the recording member.
Claim 2
Dependent Claim
94 words
A process for obtaining improved resolution of a magnetic toner image applied from a toned recording member containing a pattern of parallel magnetic lines in its image areas by contact transfer of the toner image from the recording member to a substrate surface wherein the improvement comprises removing excess toner from the toned recording member prior to toner image transfer to the substrate surface by an air flow passing across the surface of the recording member whereby the direction of air flow is substantially parallel to the magnetic line pattern in the recording member.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein the substrate is moving during application of the toner and the air flow is due to a vacuum knife, applied across the substrate in a traverse direction to the substrate movement.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein air flow is due to blowing air from an air knife positioned across the substrate surface.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the substrate surface is electrically conductive.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein the substrate surface is copper.
References Cited (Backward Citations)
US3787877A
Cited
US4072957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |