US3582731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging system
Assignee: Xerox Corp
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Filing: 1968-07-29
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Granted: 1971-06-01
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Expires: 1988-07-29
Abstract
Abstract A charge bearing member comprising a free surface first electrically insulating layer which is electrically charged and which is backed by an electrically conductive substrate, is positioned, contiguous a second electrically insulating layer to be charged on an electrically conductive substrate. The insulating layers face each other during the transfer of charge to said second electrically insulating layer. The above steps are repeated at least a second time to transfer more charge to said second electrically insulating layer.
Inventors
- 👤 Masamichi Sato
- 👤 Yasuo Tamai
- 👤 Seiji Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/02; G03G13/025
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
113 words
A charging method comprising the steps of: a. providing a charge bearing member comprising a free surface first electrically insulating layer backed by an electrically conductive substrate; b. electrostatically charging said first electrically insulating layer; c. providing a second electrically insulating layer on an electrically conductive substrate; d. bringing the electrostatically charged first electrically insulating layer to the second electrically insulating layer; e. positioning said electrically insulating layers contiguous to and facing each other to transfer charge from said first insulating layer to said second insulating layer; and f. repeating steps (a)-(e) at least a second time for the same electrically insulting layer to transfer more charge to said second electrically insulating layer.
Claim 2
Dependent Claim
113 words
A charging method comprising the steps of: a. providing a charge bearing member comprising a free surface first electrically insulating layer backed by an electrically conductive substrate; b. electrostatically charging said first electrically insulating layer; c. providing a second electrically insulating layer on an electrically conductive substrate; d. bringing the electrostatically charged first electrically insulating layer to the second electrically insulating layer; e. positioning said electrically insulating layers contiguous to and facing each other to transfer charge from said first insulating layer to said second insulating layer; and f. repeating steps (a)-(e) at least a second time for the same electrically insulting layer to transfer more charge to said second electrically insulating layer.
Claim 3
Dependent Claim
123 words
A charging method comprising the steps of: a. providing a charge bearing member comprising a free surface first electrically insulating layer backed by an electrically conductive substrate; b. electrically charging said first electrically insulating layer; c. providing a second electrically insulating layer on an electrically conductive substrate; d. positioning said electrically insulating layers contiguous to and facing each other to transfer charge from said first insulating layer to said second insulating layer; e. repeating steps (a)-(d) at least a second time for the same second electrically insulating layer to transfer more charge to said second electrically insulating layer; and f. electrically shorting the substrates at least during a part of the time when the first and second insulating layers are in contiguous relation.
Claim 4
Dependent Claim
123 words
A charging method comprising the steps of: a. providing a charge bearing member comprising a free surface first electrically insulating layer backed by an electrically conductive substrate; b. electrically charging said first electrically insulating layer; c. providing a second electrically insulating layer on an electrically conductive substrate; d. positioning said electrically insulating layers contiguous to and facing each other to transfer charge from said first insulating layer to said second insulating layer; e. repeating steps (a)-(d) at least a second time for the same second electrically insulating layer to transfer more charge to said second electrically insulating layer; and f. electrically shorting the substrates at least during a part of the time when the first and second insulating layers are in contiguous relation.
Claim 5
Dependent Claim
19 words
The method of claim 2 wherein the substrates are placed in electrically shorted contact after step (d) is accomplished.
Claim 6
Dependent Claim
18 words
A charging method according to claim 1 wherein said second electrically insulating layer is a photoconductive insulating layer.
Claim 7
Dependent Claim
18 words
A charging method according to claim 2 wherein said second electrically insulating layer is a photoconductive insulating layer.
Claim 8
Dependent Claim
19 words
A charging method according to claim 4 wherein said photoconductive insulating layer comprises a zinc oxide resinous binder layer.
Claim 9
Dependent Claim
19 words
A charging method according to claim 5 wherein said photoconductive insulating layer comprises a zinc oxide resinous binder layer.
Claim 10
Dependent Claim
34 words
A charging method according to claim 1 wherein steps (a)-(e) are repeated a sufficient number of times for the same second electrically insulating layer to charge it substantially to its charge acceptance saturation point.
Claim 11
Dependent Claim
34 words
A charging method according to claim 2 wherein steps (a)-(d) are repeated a sufficient number of times for the same second electrically insulating layer to charge it substantially to its charge acceptance saturation point.
Claim 12
Dependent Claim
23 words
A charging method according to claim 1 wherein said first electrically insulating layer is repeatedly electrically charged to the same polarity as initially.
Claim 13
Dependent Claim
16 words
A charging method according to claim 1 wherein said charge bearing member is in roller form.
Claim 14
Dependent Claim
16 words
A charging method according to claim 2 wherein said charge bearing member is in roller form.
Claim 15
Dependent Claim
35 words
A charging method according to claim 1 wherein at least one of said electrically conductive substrateS is in roller form and is caused to effectively back the insulating layer by rolling it across said layer.
Claim 16
Dependent Claim
35 words
A charging method according to claim 2 wherein at least one of said electrically conductive substrates is in roller form and is caused to effectively back the insulating layer by rolling it across said layer.
Claim 17
Dependent Claim
22 words
A charging method according to claim 1 wherein in step (e) the two insulating layers are in virtual contact with each other.
Claim 18
Dependent Claim
28 words
A charging method according to claim 13 wherein said roller also serves as a pressure roll to press the two insulating layers in virtual contact with each other.
Claim 19
Dependent Claim
30 words
A charging method according to claim 1 wherein said charge bearing member is a web advancing in a direction substantially parallel to the surface of said second electrically insulating layer.
Claim 20
Dependent Claim
40 words
A charging method according to claim 17 wherein said web comprises in addition transverse electrically insulating strips physically and electrically separating the conductive backing of the first electrically insulating layer into separate areas in the longitudinal direction of said web.
References Cited (Backward Citations)
US2892973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |