US4095233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a charge pattern
Assignee: Xerox Corp
•
Filing: 1976-06-30
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Granted: 1978-06-13
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Expires: 1996-06-30
Abstract
Abstract An ink jet apparatus deposits a pattern of charged, substantially colorless droplets on an insulating imaging surface. The droplets are dried to leave an electrostatic charge pattern. The charge pattern is developed using conventional techniques and can be electronically read.
Inventors
- 👤 William L. Goffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G17/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
A method for forming a charge pattern on an insulating surface, comprising: (a) producing substantially colorless charged droplets and uncharged droplets by means of an ink jet apparatus; (b) depositing both said charged and uncharged droplets on said insulating surface wherein said charged droplets are in a patterned configuration; and (c) allowing the droplets to dry so that a charge pattern remains on said insulating surface in said patterned configuration.
Claim 2
Independent Claim
70 words
A method for forming a charge pattern on an insulating surface, comprising: (a) producing substantially colorless charged droplets and uncharged droplets by means of an ink jet apparatus; (b) depositing both said charged and uncharged droplets on said insulating surface wherein said charged droplets are in a patterned configuration; and (c) allowing the droplets to dry so that a charge pattern remains on said insulating surface in said patterned configuration.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said surface is uniformly pre-charged in one polarity and the droplets are charged in the opposite polarity.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the charge pattern is read by an electronic recognition means.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the charge pattern is made visible by xerographic development.
Claim 6
Dependent Claim
17 words
The method of claim 1 including the additional setp of removing said charge pattern from said surface.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the droplets contain sufficient dye to be visually inspected.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the drying is aided by heating the surface.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein the ink jet means is selectively activated responsive to optical scanning of an original image.
Claim 10
Dependent Claim
17 words
The method of claim 1 wherein the ink jet means is selectively activated responsive to computer output.
Claim 11
Independent Claim
73 words
An apparatus for creating a charge pattern on an insulating imaging surface which comprises: (a) an ink jet means for producing both charged droplets and uncharged droplets; (b) a grounded support means for said insulating imaging surface; and (c) a control means for driving the ink jet means such that both said charged and uncharged droplets are deposited on said insulating imaging surface with said charged droplets being deposited in a patterned configuration.
Claim 12
Independent Claim
73 words
An apparatus for creating a charge pattern on an insulating imaging surface which comprises: (a) an ink jet means for producing both charged droplets and uncharged droplets; (b) a grounded support means for said insulating imaging surface; and (c) a control means for driving the ink jet means such that both said charged and uncharged droplets are deposited on said insulating imaging surface with said charged droplets being deposited in a patterned configuration.
Claim 13
Dependent Claim
13 words
The apparatus of claim 10 including a means for reading the charge pattern.
Claim 14
Dependent Claim
14 words
The apparatus of claim 10 including a means for xerographically developing the charge pattern.
Claim 15
Dependent Claim
14 words
The apparatus of claim 10 including a means to aid drying of the droplets.
Claim 16
Dependent Claim
26 words
The apparatus of claim 10 including a means for uniformly pre-charging said insulating surface with a charge having a polarity opposite that of the charged droplets.
Claim 17
Dependent Claim
17 words
The apparatus of claim 10 including a means for erasing the charge pattern from said insulating surface.
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |