US4185916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite developer particles and apparatus for using same
Assignee: Xerox Corp
•
Filing: 1977-04-08
•
Granted: 1980-01-29
•
Expires: 1997-04-08
Abstract
Abstract A composite particle comprising a conductive portion and an insulating portion. The insulating portion is integral and contiguous with the conductive portion.
Inventors
- 👤 Roger L. Miller
- 👤 Lloyd F. Bean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/083; G03G13/00; G03G13/06; G03G13/08; G03G13/09; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
81 words
An electrophotographic printing machine, including: a photoconductive member; means for charging at least a portion of said photoconductive member to a substantially uniform level; means for exposing the charged portion of said photoconductive member to a light image of an original document being reproduced; and means for developing the latent image recorded on said photoconductive member with composite particles having a conductive portion and an insulating portion with the conductive portion and insulating portion being integral and contiguous with one another.
Claim 2
Dependent Claim
81 words
An electrophotographic printing machine, including: a photoconductive member; means for charging at least a portion of said photoconductive member to a substantially uniform level; means for exposing the charged portion of said photoconductive member to a light image of an original document being reproduced; and means for developing the latent image recorded on said photoconductive member with composite particles having a conductive portion and an insulating portion with the conductive portion and insulating portion being integral and contiguous with one another.
Claim 3
Dependent Claim
18 words
A printing machine as recited in claim 1 wherein the conductive portion of the composite particles is magnetic.
Claim 4
Dependent Claim
18 words
A printing machine as recited in claim 1, wherein the insulating portion of the composite particles is non-magnetic.
Claim 5
Dependent Claim
18 words
A printing machine as recited in claim 2, wherein the insulating portion of the composite particles is magnetic.
Claim 6
Dependent Claim
18 words
A printing machine as recited in claim 1, wherein the conductive portion of the composite particles is non-magnetic.
Claim 7
Dependent Claim
18 words
A printing machine as recited in claim 5, wherein the insulating portion of the composite particles is magnetic.
Claim 8
Dependent Claim
18 words
A printing machine as recited in claim 6, wherein the insulating portion of the composite particles is non-magnetic.
Claim 9
Dependent Claim
36 words
A printing machine a recited in claim 1, wherein the conductive portion of the composite particles is of a first polarity and the insulating portion thereof is of a second plurality opposed to the first polarity.
Claim 10
Dependent Claim
29 words
A printing machine as recited in claim 1, wherein the composite particles are of an asymetrical configuration with the conductive portion being greater in size than the insulative portion.
Claim 11
Dependent Claim
30 words
A printing machine as recited in claim 1, wherein the composite particles are of a symetrical configuration with the conductive portion being substantially equal in size to the insulating portion.
Claim 12
Independent Claim
76 words
An apparatus for developing a latent image recorded on a support member, including: a housing defining a chamber for storing a supply of composite particles having a conductive portion and an insulating portion with the insulating portion and conductive portion being contiguous and integral with one another; and means, operatively associated with the composite particles stored in the chamber of said housing, for depositing the composite particles on the latent image recorded on the support member.
Claim 13
Independent Claim
76 words
An apparatus for developing a latent image recorded on a support member, including: a housing defining a chamber for storing a supply of composite particles having a conductive portion and an insulating portion with the insulating portion and conductive portion being contiguous and integral with one another; and means, operatively associated with the composite particles stored in the chamber of said housing, for depositing the composite particles on the latent image recorded on the support member.
Claim 14
Dependent Claim
24 words
An apparatus as recited in claim 11, wherein the conductive portion of the composite particles sotred in the chamber of said housing is magnetic.
Claim 15
Dependent Claim
24 words
An apparatus as recited in claim 12, wherein the insulating portion of the composite particles stored in the chamber of said housing is non-magnetic.
Claim 16
Dependent Claim
24 words
An apparatus as recited in claim 12, wherein the insulating portion of the composite particles stored in the chamber of said housing is magnetic.
Claim 17
Dependent Claim
24 words
An apparatus as recited in claim 11, wherein the conductive portion of the conductive particles stored in the chamber of said housing is non-magnetic.
Claim 18
Dependent Claim
24 words
An apparatus as recited in claim 15, wherein the insulating portion of the composite particles stored in the chamber of said housing is magnetic.
Claim 19
Dependent Claim
24 words
An apparatus as recited in claim 16, wherein the insulating portion of the composite particles stored in the chamber of said housing is non-magnetic.
Claim 20
Dependent Claim
42 words
An apparatus as recited in claim 11, wherein the conductive portion of the composite particles stored in the chamber of said housing is of a first polarity and the insulating portion thereof is of a second polarity opposed to the first polarity.
Claim 21
Dependent Claim
35 words
An apparatus as recited in claim 11, wherein the composite particles stored in the chamber of said housing is of an asymetrical configuration with the conductive portion being greater in size than the insulating portion.
Claim 22
Dependent Claim
36 words
An apparatus as recited in claim 11, wherein the composite particles stored in the chamber of said housing is of a symetrical configuration with the conductive portion being substantially equal in size to the insulating portion.
References Cited (Backward Citations)
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Cited
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Cited
US3645770A
Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |