US4837591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highlight color imaging by depositing positive and negative ions on a substrate
Assignee: Xerox Corp
•
Filing: 1988-05-02
•
Granted: 1989-06-06
•
Expires: 2008-05-02
Abstract
Abstract A method and apparatus for selectively depositing positive and negative ions on a receptor. In the preferred embodiment, the ions are deposited in image configuration from a single source of both positive and negative ions. The positive and negative images are subsequently developed with different color toners in order to form a highlight color image.
Inventors
- 👤 Christopher Snelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323; G03G15/01; G03G15/0105; G03G15/011
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
Apparatus for depositing ions on a charge receptor, said apparatus comprising: means for generating positive and negative ions; means for selectively effecting extraction of positive or negative ions from said generating means and depositing them on a charge receptor, said means for selectively effecting extraction of positive or negative ions effecting extraction of positive and negative ions in image configuration to thereby form positive and negative images on said receptor; and means for developing images formed by said positive ions with a first type of toner; and means for developing images formed by said negative ions with a second type of toner.
Claim 2
Dependent Claim
102 words
Apparatus for depositing ions on a charge receptor, said apparatus comprising: means for generating positive and negative ions; means for selectively effecting extraction of positive or negative ions from said generating means and depositing them on a charge receptor, said means for selectively effecting extraction of positive or negative ions effecting extraction of positive and negative ions in image configuration to thereby form positive and negative images on said receptor; and means for developing images formed by said positive ions with a first type of toner; and means for developing images formed by said negative ions with a second type of toner.
Claim 3
Dependent Claim
92 words
Method of depositing ions on a charge receptor, said method including the steps of: generating positive and negative ions; selectively effecting extraction of positive or negative ions from said generating means and depositing them on a charge receptor, said step of selectively effecting extraction effecting extraction of positive and negative ions in image configuration to thereby form positive and negative images on said receptor; and developing images formed by said positive ions with a first type of toner; and developing images formed by said negative ions with a second type of toner.
Claim 4
Dependent Claim
92 words
Method of depositing ions on a charge receptor, said method including the steps of: generating positive and negative ions; selectively effecting extraction of positive or negative ions from said generating means and depositing them on a charge receptor, said step of selectively effecting extraction effecting extraction of positive and negative ions in image configuration to thereby form positive and negative images on said receptor; and developing images formed by said positive ions with a first type of toner; and developing images formed by said negative ions with a second type of toner.
Claim 5
Dependent Claim
15 words
Apparatus according to claim 1 wherein said means for developing images comprises different color toners.
Claim 6
Dependent Claim
20 words
Apparatus according to claim 3 wherein said means for generating ions comprises a single source of positive and negative ions.
Claim 7
Dependent Claim
33 words
Apparatus according to claim 4 wherein said single source comprises a pair of electrodes spaced apart by a dielectric member and a source of AC power is applied to said pair of electrodes.
Claim 8
Dependent Claim
45 words
Apparatus according to claim 5 wherein said means for selectively effecting extraction of positive or negative ions comprises a plurality of switches operatively coupling positive and negative DC voltages to said single source to thereby establish electrostatic fields between said single source and said receptor.
Claim 9
Dependent Claim
17 words
The method according to claim 2 wherein said first and second types of toner are different colors.
Claim 10
Dependent Claim
26 words
The method according to claim 7 wherein said step of generating positive and negative ions comprises using a single source of both positive and negative ions.
Claim 11
Dependent Claim
34 words
The method according to claim 8 wherein said single source comprises a pair of electrodes spaced apart by a dielectric member and a source of AC power is applied to said pair of electrodes.
Claim 12
Dependent Claim
46 words
The method according to claim 9 wherein said means for selectively effecting extraction of positive or negative ions comprises a plurality of switches operatively coupling positive and negative DC voltages to said single source to thereby establish electrostatic fields between said single source and said receptor.
References Cited (Backward Citations)
US4087826A
Cited
US4078929A
Cited
US4155093A
Cited
US4409604A
Cited
US4463363A
Cited
US4584592A
Cited
US4660059A
Cited
JPS62175778A
Cited
US4727388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |