US5036362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequential development with magnetic and non-magnetic toner
Assignee: Eastman Kodak Co
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Filing: 1990-06-28
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Granted: 1991-07-30
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Expires: 2010-06-28
Abstract
Abstract Electrostatographic reproduction apparatus has two development stations in tandem to first develop a latent image with magnetic toner so that small details, lines, and the edges of solids are developed; and to then develop the remaining undeveloped or underdeveloped portions of the latent image with non-magnetic toner to fill in the inside of the solid areas. Preferably, the magnetic toner development station has a development electrode spaced further from the photoconductor than the electrode of the non-magnetic toner development station.
Inventors
- 👤 Eric C. Stelter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:21
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; G06K1/125; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G13/09; G03G15/00; G03G15/06; G03G15/08; G06K15/00; G06K15/02; G06K15/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
An electrostatographic reproduction apparatus comprising: an image transfer member; means for producing an electrostatic latent image on said image transfer member; a first development station adapted to develop small details, lines, and the edges of solid areas of said latent image with magnetic toner; and a second development station adapted to develop the inside of solid areas of said latent image with non-magnetic toner.
Claim 2
Dependent Claim
64 words
An electrostatographic reproduction apparatus comprising: an image transfer member; means for producing an electrostatic latent image on said image transfer member; a first development station adapted to develop small details, lines, and the edges of solid areas of said latent image with magnetic toner; and a second development station adapted to develop the inside of solid areas of said latent image with non-magnetic toner.
Claim 3
Dependent Claim
21 words
An electrostatographic reproduction apparatus as set forth in claim 1 wherein said first and second development stations are positioned in tandem.
Claim 4
Dependent Claim
20 words
An electrostatographic reproduction apparatus as set forth in claim 2 wherein said first development station precedes said second development station.
Claim 5
Dependent Claim
42 words
An electrostatographic reproduction apparatus as set forth in claim 1 wherein: said first and second development stations include respective first and second development electrodes; and said first development electrode is spaced further from the image transfer member than the second development electrode.
Claim 6
Dependent Claim
46 words
A process for electrostatographically producing documents comprising the steps of: producing an electrostatic latent image; developing small details, lines, and the edges of solids portions of said latent image with magnetic toner; and developing the inside of solid areas of said latent image with non-magnetic toner
Claim 7
Dependent Claim
46 words
A process for electrostatographically producing documents comprising the steps of: producing an electrostatic latent image; developing small details, lines, and the edges of solids portions of said latent image with magnetic toner; and developing the inside of solid areas of said latent image with non-magnetic toner
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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |