US4660504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensionable skive for magnetic brush application
Assignee: Eastman Kodak Co
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Filing: 1986-02-24
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Granted: 1987-04-28
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Expires: 2006-02-24
Abstract
Abstract Skiving apparatus for use in electrographic copiers for stripping magnetically attractive developer from the outer sleeve of a magnetic brush applicator. Such apparatus comprises an elongated and flexible skive blade and means for applying equal and opposite axial forces at spaced locations along the blade to produce tension in the skive blade and thereby provide a straight skiving edge. Preferably, the skive blade is made of a magnetically attractive material so that it is attracted toward the magnetic core piece of the brush applicator.
Inventors
- 👤 Richard A. Weitzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
In an electrographic magnetic brush applicator system of the type including a cylindrical outer sleeve to which developer is attractible by a magnetic core piece positioned within the sleeve, and means for producing relative movement between the sleeve and core piece to transport such developer between a development zone and a supply, a device for skiving developer from such sleeve comprising a flexible, elongated skive blade, means for tensioning said blade to produce a straight skiving edge, and means for supporting said skiving edge proximate the sleeve periphery.
Claim 2
Dependent Claim
88 words
In an electrographic magnetic brush applicator system of the type including a cylindrical outer sleeve to which developer is attractible by a magnetic core piece positioned within the sleeve, and means for producing relative movement between the sleeve and core piece to transport such developer between a development zone and a supply, a device for skiving developer from such sleeve comprising a flexible, elongated skive blade, means for tensioning said blade to produce a straight skiving edge, and means for supporting said skiving edge proximate the sleeve periphery.
Claim 3
Dependent Claim
14 words
The apparatus as defined by claim 1 wherein said skive blade is magnetically attractive.
Claim 4
Dependent Claim
22 words
The apparatus as defined by claim 2 wherein said skive is made of steel having a thickness between 25 and 250 microns.
Claim 5
Dependent Claim
101 words
Apparatus for skiving developer from an electrographic magnetic brush applicator, such applicator comprising a cylindrical sleeve to which a magnetically attractive developer adheres by a magnetic core piece positioned within the sleeve, and means for producing relative movement between the sleeve and core piece to advance such developer over the outer surface of the sleeve, said apparatus comprising a flexible, elongated skive blade, tensioning means for applying equal and opposite forces on said blade at spaced locations to produce tension therein, whereby a straight skiving edge is provided, and means for urging said skiving edge into contact with the sleeve periphery.
Claim 6
Dependent Claim
101 words
Apparatus for skiving developer from an electrographic magnetic brush applicator, such applicator comprising a cylindrical sleeve to which a magnetically attractive developer adheres by a magnetic core piece positioned within the sleeve, and means for producing relative movement between the sleeve and core piece to advance such developer over the outer surface of the sleeve, said apparatus comprising a flexible, elongated skive blade, tensioning means for applying equal and opposite forces on said blade at spaced locations to produce tension therein, whereby a straight skiving edge is provided, and means for urging said skiving edge into contact with the sleeve periphery.
Claim 7
Dependent Claim
14 words
The apparatus as defined by claim 4 wherein said skive blade is magnetically attractive.
Claim 8
Dependent Claim
22 words
The apparatus as defined by claim 5 wherein said skive is made of steel having a thickness between 25 and 250 microns.
Claim 9
Dependent Claim
87 words
Electrographic development apparatus comprising a magnetic brush applicator having a cylindrical outer sleeve and a magnetic core piece positioned therein, means for producing relative movement between said sleeve and core piece to transport a magnetically attractive developer between a development zone and a developer supply, and skiving means for skiving said developer from said sleeve, said skiving means comprising a flexible, elongated skive blade, tensioning means for tensioning said blade to provide a straight skiving edge, and means for supporting said skiving edge proximate the sleeve periphery.
Claim 10
Dependent Claim
87 words
Electrographic development apparatus comprising a magnetic brush applicator having a cylindrical outer sleeve and a magnetic core piece positioned therein, means for producing relative movement between said sleeve and core piece to transport a magnetically attractive developer between a development zone and a developer supply, and skiving means for skiving said developer from said sleeve, said skiving means comprising a flexible, elongated skive blade, tensioning means for tensioning said blade to provide a straight skiving edge, and means for supporting said skiving edge proximate the sleeve periphery.
Claim 11
Dependent Claim
19 words
The apparatus as defined by claim 7 further comprising means for biasing said skiving edge toward said sleeve periphery.
Claim 12
Dependent Claim
29 words
The apparatus as defined by claim 7 wherein said blade is magnetically attractive, whereby said blade is urged into contact with said sleeve periphery by said magnetic core piece.
References Cited (Backward Citations)
US3847480A
Cited
US4392735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |