US4042415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for scraping liquids from a moving surface
Assignee: Xerox Corp
•
Filing: 1975-07-23
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Granted: 1977-08-16
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Expires: 1995-07-23
Abstract
Abstract Surfaces are cleaned of liquid developer by a blade having a configuration which deflects material away from the surface undergoing cleaning while it cleans the surface as a scraper blade. The blade provides a scraper function in addition to conveying the liquid developer cleaned from the surface to a retention reservoir.
Inventors
- 👤 Stephen C. P. Hwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:25
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0088; B; B08; B08B; B08B1/00; B08B1/10; B08B1/16; B08B1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A method of deflecting liquid developer from a support surface movable in a given direction comprising engaging at least two scraper blades in succession in contact with the uphill portion of the support surface, so that a second scraper blade is downstream from a first scraper blade, at least the first scraper blade having an upper stem portion extending opposite said given direction to a point of contact of the upper stem portion with said surface, said point of contact on the upper stem portion being a cutting tip, and a lower stem portion extending towards the upper stem portion in said given direction until it intersects and forms an angle with the upper stem portion, the upper portion having a drip tip adjacent the point of contact of the upper stem portion with said surface; and moving the support surface in a given direction, whereby both blades scrape liquid developer from the support surface, and liquid developer accumulated by said second scraper blade collects at the downstream side of said first scraper blade and is removed by flowing over the lower stem portion of said first scraper blade.
Claim 2
Independent Claim
189 words
A method of deflecting liquid developer from a support surface movable in a given direction comprising engaging at least two scraper blades in succession in contact with the uphill portion of the support surface, so that a second scraper blade is downstream from a first scraper blade, at least the first scraper blade having an upper stem portion extending opposite said given direction to a point of contact of the upper stem portion with said surface, said point of contact on the upper stem portion being a cutting tip, and a lower stem portion extending towards the upper stem portion in said given direction until it intersects and forms an angle with the upper stem portion, the upper portion having a drip tip adjacent the point of contact of the upper stem portion with said surface; and moving the support surface in a given direction, whereby both blades scrape liquid developer from the support surface, and liquid developer accumulated by said second scraper blade collects at the downstream side of said first scraper blade and is removed by flowing over the lower stem portion of said first scraper blade.
References Cited (Backward Citations)
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Cited
US2418706A
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US3183541A
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US3859691A
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US3811914A
Cited
US3788219A
Cited
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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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |