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US3789796A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for producing developer material

Assignee: Xerox Corp
•
Filing: 1971-01-20
•
Granted: 1974-02-05
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Expires: 1991-01-20
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Abstract

Abstract Carrier beads for electrostatographic developer mixtures having substantially smooth surfaces and having finely divided particulate material imbedded in a softenable surface are made by softening the external surface of the bead material and contacting the softened bead with finely divided particulate material and subjecting the beads to multiple collisions with other beads.

Inventors

  • 👤 R Madrid

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 11:02
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1131; G03G9/103; G03G9/1132; G03G9/1133; Y; Y10; Y10S; Y10S118/00; Y10S118/05

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 34 words
An apparatus according to claim 1 wherein said oscillating means provides oscillatory frequencies between about 1,000 and about 4,000 regular oscillatory vibrations per minute and vibration amplitudes from about 0.001 to about 0.25 inches.
Claim 2
Dependent Claim 23 words
An apparatus according to claim 1 wherein said treatment housing includes a chamber having curved lips to guide the direction of said beads.
Claim 3
Dependent Claim 17 words
An apparatus according to claim 1 wherein said treatment housing includes a chamber which is elongated axially
Claim 4
Independent Claim 113 words
An apparatus for incorporating finely divided particulate material into at least the softenable external surfaces of beads which are grossly larger than said finely divided particulate material, said apparatus comprising a treatment housing for said beads wherein said treatment housing is provided with reciprocatory energy means through a connecting rod driven by a rotating crank shaft and wherein said treatment housing is journaled for linear reciprocatory movement along guide rods by means of sleeve bearings secured to brackets attached to said treatment housing, and means coupled with said housing to soften said external surfaces of said beads whereby said beads impact said finely divided particulate material into said external surfaces of said beads.
Claim 5
Independent Claim 141 words
An apparatus for incorporating finely divided particulate material into at least the softenable external surfaces of beads which are grossly larger than said finely divided particulate material, said apparatus comprising a treatment housing for said beads wherein said treatment housing is provided with oscillating means situated remote from said treatment housing and said oscillating means comprises a rotatable eccentric weight mounted on a shaft journaled in support bearings, said shaft being connected to a pulley by a flexible spring and a shaft supported by another set of bearings wherein said pulley is rotatable by a belt driven by a pulley connected to a reversible motor through a variable speed driven mechanism, and means coupled with said housing to soften said external surfaces of said beads whereby said beads impact said finely divided particulate material into said external surfaces of said beads.
Claim 6
Dependent Claim 20 words
An apparatus according to claim 6 wherein said support bearings are rigidly secured to a frame bearing said treatment housing.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-04 1977-08-06 1978-02-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-04 1981-08-06 1982-02-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-04 1985-08-06 1986-02-05 $7700.00 Window Closed / Lapsed

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