US3769009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inking system for liquid particle migration on automatic machines
Assignee: Xerox Corp
•
Filing: 1971-12-29
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Granted: 1973-10-30
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Expires: 1991-12-29
Abstract
Abstract An improved photoelectrophoretic imaging process is provided comprising adding sufficient additional insulating carrier liquid to the imaging suspension to maintain the concentration of said suspension substantially constant during the period of contact with an absorbent copy web.
Inventors
- 👤 J Wells
- 👤 R Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:56
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
Method as defined in claim 1 wherein the third electrode is covered with a blocking layer.
Claim 2
Dependent Claim
35 words
Method as defined in claim 1 wherein said additional insulating carrier liquid is added to the imaging suspension by spraying said additional insulating carrier liquid into the nip formed between said first and second electrodes.
Claim 3
Dependent Claim
45 words
Method as defined in claim 1 wherein said additional insulating carrier liquid is added to the imaging suspension by applying said additional insulating carrier liquid to the absorbent web prior to passage of said web into the nip formed by said first and third electrodes.
Claim 4
Dependent Claim
30 words
Method as defined in claim 1 wherein the concentration of pigment in the imaging suspension ranges from about 2 to about 10 percent pigment by weight of the imaging suspension.
Claim 5
Dependent Claim
33 words
Method as defined in claim 1 wherein a potential above the corona threshold potential for the air gap between the imaging suspension and the second charging electrode is applied to said second electrode.
Claim 6
Dependent Claim
22 words
Method as defined in claim 1 wherein the potential applied to the charging electrode ranges from about 2,500 to about 8,500 volts.
Claim 7
Dependent Claim
24 words
Method as defined in claim 1 wherein a field is established across the imaging suspension within the imaging zone of at least 5 volts/micron.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |