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US3945342A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic brush support member

Assignee: Xerox Corp
•
Filing: 1975-01-29
•
Granted: 1976-03-23
•
Expires: 1995-01-29
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Abstract

Abstract A magnetic brush support member, the process of making it and a magnetic brush apparatus incorporating the support member are provided. The support member includes at least one surface for supporting a magnetic brush. The support member is formed of a composite comprising a metal binder component and a particulate second phase component. The second phase material is selected to have a greater abrasion resistance than the metal binder. A portion of the second phase protrudes from the metal binder at the support surface. The support member may be formed by casting or powder metallurgical techniques followed by removing a portion of the metal binder from the support surface to allow the second phase particles to protrude therefrom. Magnetic brush apparatuses adapted for cleaning or developing in electrostatographic machines are provided which include one or more of the magnetic brush support members.

Inventors

  • 👤 Arthur Drummond, Jr.

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 21:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G03G15/0928

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 102 words
A magnetic brush apparatus including: at least one magnetic brush support member having a surface adapted to support a magnetic brush including magnetic particles and means cooperating with said support member for providing a magnetic field for forming said brush, the improvement wherein; said magnetic brush support member is formed of a composite comprising a metal binder component and a particulate second phase component wherein: said second phase component is formed of a material which has a greater abrasion resistance than said metal binder and wherein a portion of said second phase component protrudes at said support surface from said metal binder.
Claim 2
Dependent Claim 102 words
A magnetic brush apparatus including: at least one magnetic brush support member having a surface adapted to support a magnetic brush including magnetic particles and means cooperating with said support member for providing a magnetic field for forming said brush, the improvement wherein; said magnetic brush support member is formed of a composite comprising a metal binder component and a particulate second phase component wherein: said second phase component is formed of a material which has a greater abrasion resistance than said metal binder and wherein a portion of said second phase component protrudes at said support surface from said metal binder.
Claim 3
Dependent Claim 18 words
An apparatus as in claim 1 wherein said second phase component is uniformly dispersed throughout said metal matrix.
Claim 4
Dependent Claim 20 words
An apparatus as in claim 1 wherein said second phase component is segregated toward the support surface of said member.
Claim 5
Dependent Claim 30 words
An apparatus as in claim 1 wherein said metal binder component is selected from a group consisting of aluminum, aluminum alloys, copper, copper alloys, nickel, nickel alloys, iron, and steels.
Claim 6
Dependent Claim 27 words
An apparatus as in claim 4 wherein said particulate second phase component is formed of a material selected from the group consisting of carbides, oxides and nitrides.
Claim 7
Dependent Claim 14 words
An apparatus as in claim 1 which includes a plurality of said support members.
Claim 8
Dependent Claim 15 words
An apparatus as in claim 1 which comprises a development apparatus for an electrostatographic machine.

References Cited (Backward Citations)

US2062317A Cited
US3246629A Cited
US3364545A Cited
US3447221A Cited
US3707947A Cited
US3863603A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-03-23 1979-09-22 1980-03-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-03-23 1983-09-22 1984-03-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-03-23 1987-09-22 1988-03-23 $7700.00 Window Closed / Lapsed

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