US4833492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge neutralization for plain paper electrography
Assignee: Xerox Corp
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Filing: 1988-07-18
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Granted: 1989-05-23
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Expires: 2008-07-18
Abstract
Abstract An ion projection printing apparatus for printing on one side of a charge receptor sheet including an ion projection means, development means, a back electrode positioned on the opposite side of the sheet from the ion projection means, development means to receive the sheet in intimate contact, and a corotron disposed on the same side of the sheet as the ion projection means and the development means in the vicinity of the point of separation of the paper from the back electrode, the corotron providing a charge source to neutralize the residual electrical charge on said paper.
Inventors
- 👤 David E. Damouth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6597; G03G15/22; G03G15/32; G03G15/321; G03G15/6588; G03G15/6594; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00371; G03G2215/00443; G03G2215/00451; G03G2215/00518; G03G2215/00535; G03G2215/00654
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An ion projection printing apparatus for printing on one side of a sheet including sequentially in a processing direction, an ion projection means, development means, and fusing means comprising: a back electrode positioned on the opposite side of the sheet from the ion projection means and development means to receive the sheet in intimate contact, the back electrode extending from the charging means to the development means, and a charging means disposed on the same side of the sheet as the ion projection means and the development means intermediate the development means and fusing means, in the vicinity of the point of separation of the sheet from the back electrode, the charging means providing a charge source to neutralize the residual electrical charge on said sheet.
Claim 2
Dependent Claim
126 words
An ion projection printing apparatus for printing on one side of a sheet including sequentially in a processing direction, an ion projection means, development means, and fusing means comprising: a back electrode positioned on the opposite side of the sheet from the ion projection means and development means to receive the sheet in intimate contact, the back electrode extending from the charging means to the development means, and a charging means disposed on the same side of the sheet as the ion projection means and the development means intermediate the development means and fusing means, in the vicinity of the point of separation of the sheet from the back electrode, the charging means providing a charge source to neutralize the residual electrical charge on said sheet.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein the charging means is an a.c. or d.c. corotron.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 wherein the sheet is neutralized prior to separation from the back electrode.
Claim 5
Dependent Claim
102 words
An ion projection printing apparatus for printing on one side of a sheet including an ion projection means and development means comprising: a back electrode positioned on the opposite side of the sheet from the ion projection means and development means to receive the charge receptor sheet in intimate contact, and a charging means disposed on the same side of the sheet as the ion projection means and the development means in the vicinity of the point of separation of the sheet from the back electrode, the charging means providing a charge source to neutralize the residual electrical charge on said sheet.
Claim 6
Dependent Claim
102 words
An ion projection printing apparatus for printing on one side of a sheet including an ion projection means and development means comprising: a back electrode positioned on the opposite side of the sheet from the ion projection means and development means to receive the charge receptor sheet in intimate contact, and a charging means disposed on the same side of the sheet as the ion projection means and the development means in the vicinity of the point of separation of the sheet from the back electrode, the charging means providing a charge source to neutralize the residual electrical charge on said sheet.
Claim 7
Dependent Claim
12 words
The apparatus of claim 4 wherein the charging means is a corotron.
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |