US4630919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectable color system
Assignee: Xerox Corp
•
Filing: 1985-07-22
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Granted: 1986-12-23
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Expires: 2005-07-22
Abstract
Abstract A printing apparatus comprising a flexible photoreceptor belt movable past a series of image processing stations, and driven around at least two support rollers, has a developer module having at least two alternately selectable stationary developer housings positioned within the run of the photoreceptor belt between the support rolls together with an articulating backup blade to alternately urge the photoreceptor belt into development engagement with one of the stationary developer housings to develop an electrostatic latent image formed on the belt.
Inventors
- 👤 Joseph Fantuzzo
- 👤 Edwin R. Monkelbaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/06; G03G15/08; G03G15/22; G03G15/28; G03G15/283
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
Printing apparatus comprising a flexible photoreceptor belt movable past a series of image processing stations, said belt being driven around at least two support rollers, means to form an electrostatic latent image on said belt, means to develop said electrostatic latent image with a marking material comprising a developer module having at least two alternately selectable stationary developer housings positioned within a run of the photoreceptor belt between said support rolls, means to alternately urge said photoreceptor belt into development engagement with one of said stationary developer housings to develop said electrostatic latent image said urging means comprising a dual position articulating backup blade in the interior of the run of said belt, the two ends of which are alternately engageable with the belt to provide developing engagement with one of said developer housings, and means to transfer said developed image to a receiving surface.
Claim 2
Dependent Claim
145 words
Printing apparatus comprising a flexible photoreceptor belt movable past a series of image processing stations, said belt being driven around at least two support rollers, means to form an electrostatic latent image on said belt, means to develop said electrostatic latent image with a marking material comprising a developer module having at least two alternately selectable stationary developer housings positioned within a run of the photoreceptor belt between said support rolls, means to alternately urge said photoreceptor belt into development engagement with one of said stationary developer housings to develop said electrostatic latent image said urging means comprising a dual position articulating backup blade in the interior of the run of said belt, the two ends of which are alternately engageable with the belt to provide developing engagement with one of said developer housings, and means to transfer said developed image to a receiving surface.
Claim 3
Dependent Claim
33 words
The printing apparatus of claim 1 including means to alternately manually articulate said dual position articulating backup blade between positions to provide development engagement of the belt with one of said developer housings.
Claim 4
Dependent Claim
20 words
The printing apparatus of claim 1 wherein said developer module comprises two separate developer housings with different color developer material.
Claim 5
Dependent Claim
32 words
The printing apparatus of claim 1 wherein each developer housing apparatus comprises a rotatable developer applicator roll for supplying developer to the electrostatic latent image when in development engagement with said belt.
Claim 6
Dependent Claim
29 words
The printing apparatus of claim 1 wherein the developer module further includes means to clean the photoreceptor belt in advance of the first developer housing in the developer module.
Claim 7
Dependent Claim
40 words
The printing apparatus of claim 1 wherein said means to form an electrostatic latent image comprises means to uniformly charge the photoreceptor belt and means to expose said charged photoreceptor belt to a light and shadow image to be reproduced.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |