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US3893815A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic brush support member

Assignee: Xerox Corp
•
Filing: 1973-11-08
•
Granted: 1975-07-08
•
Expires: 1993-11-08
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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

  • 👤 Jr Arthur Drummond

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 14:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G03G15/0928

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 81 words
A MAGNETIC BRUSH SUPPORT SUPPORT MEMBER COMPRISING A HOLLOW SLEEVE HAVING AN ENDLESS SURFACE FOR SUPPORTING A MAGNETIC BRUSH INCLUDING MAGNETIC PARTICLE THE IMPROVEMENT WHEREIN: SAID SLEEVE IS FORMED OF A COMPOSITE COMPRISING A METAL BINDER COMPONENT AND A PARTICULATE SECOND PHASE COMPONENT, SAID SECOND PHASE COMPONENT COMPRISING A MATERIAL WHICH HAS A GREATER ABRASION RESISTANCE THAN SAID METAL BINDER COMPONENT A PORTION OF SAID PARTICULATE SECOND PHASE COMPONENT PROTRUDING FROM SAID BINDER COMPONENT AT SAID SUPPORT SURFACE OF SAID MEMBER.
Claim 2
Dependent Claim 81 words
A MAGNETIC BRUSH SUPPORT SUPPORT MEMBER COMPRISING A HOLLOW SLEEVE HAVING AN ENDLESS SURFACE FOR SUPPORTING A MAGNETIC BRUSH INCLUDING MAGNETIC PARTICLE THE IMPROVEMENT WHEREIN: SAID SLEEVE IS FORMED OF A COMPOSITE COMPRISING A METAL BINDER COMPONENT AND A PARTICULATE SECOND PHASE COMPONENT, SAID SECOND PHASE COMPONENT COMPRISING A MATERIAL WHICH HAS A GREATER ABRASION RESISTANCE THAN SAID METAL BINDER COMPONENT A PORTION OF SAID PARTICULATE SECOND PHASE COMPONENT PROTRUDING FROM SAID BINDER COMPONENT AT SAID SUPPORT SURFACE OF SAID MEMBER.
Claim 3
Dependent Claim 27 words
A support member as in claim 1 wherein said metal binder component comprises the matrix of said composite and wherein said second phase component is dispersed therein.
Claim 4
Dependent Claim 19 words
A support member as in claim 2 wherein said second phase component is uniformly dispersed throughout said metal matrix.
Claim 5
Dependent Claim 21 words
A support member as in claim 1 wherein said second phase component is segregated toward the support surface of said member.
Claim 6
Dependent Claim 31 words
A support member 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 7
Dependent Claim 25 words
A support member as in claim 5 wherein said particles are formed of a material selected from the group consisting of carbides, oxides and nitrides.
Claim 8
Dependent Claim 15 words
A support member as in claim 6 wherein said support member has a cylindrical shape.
Claim 9
Dependent Claim 15 words
A support member as in claim 1 wherein said support surface comprises an etched surface.

References Cited (Backward Citations)

US604569A Cited
US2024591A Cited
US2062317A Cited
US2811960A Cited
US3040704A Cited
US2978847A Cited
US3440774A Cited
US3246629A Cited
US3383807A Cited
US3640027A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-07-07 1979-01-06 1979-07-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-07-07 1983-01-06 1983-07-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-07-07 1987-01-06 1987-07-08 $7700.00 Window Closed / Lapsed

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