Patent US3848993A successfully refreshed from Google Patents.
US3848993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported developer blade cleaning
Assignee: Xerox Corp
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Filing: 1973-05-03
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Granted: 1974-11-19
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Expires: 1993-05-03
Abstract
Abstract An electrostatographic cleaning system for cleaning dry toner from a photoreceptor surface without lubrication other than the toner itself, comprising a sharp-edged elastomer cleaning tip held in chiseling engagement against the photoreceptor, which tip is integrally mounted on a main blade portion of a much more rigid but thin material, such as thin steel shimstock, which extends out to closely adjacent the cleaning edge of the tip to support it. This main blade portion is cantilever mounted generally parallel to, and into the direction of movement of the photoreceptor surface. A separate independently cantilevered backup blade cooperatively supports the cleaning tip.
Inventors
- 👤 C Hasiotis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029; G03G21/0017
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
221 words
A photoreceptor blade cleaning system for cleaning dry developer material from a moving photoreceptor surface in electrophotographic apparatus comprising: a cleaning blade having a main portion of thin planer material with a mounting edge and an opposing free edge substantially spaced from said mounting edge, said cleaning blade further having a cleaning tip portion comprising a body of elastomer material Mounted to said free edge of said main portion substantially spaced from said mounting edge, said main portion being resiliently flexible only perpendicular said planar dimensions thereof, and being cantilever mounted by blade mounting means at said mounting edge of said main portion, and extending generally parallel to said photoreceptor surface for substantial resilience only in a direction toward or away from said photoreceptor surface, said cleaning blade being mounted to project toward the direction of motion of said photoreceptor surface when in cleaning engagement therewith to provide a chiseling cleaning engagement of said cleaning tip against said surface, and means for pressing said tip portion of said cleaning blade into substantially uniform cleaning engagement with said photoreceptor surface, including an independent backing blade member cantilever mounted independently from said main portion of said cleaning blade, said backing blade having a free edge resiliently engaging said cleaning tip portion to uniformly support and urge said cleaning tip portion against said photoreceptor.
Claim 2
Dependent Claim
221 words
A photoreceptor blade cleaning system for cleaning dry developer material from a moving photoreceptor surface in electrophotographic apparatus comprising: a cleaning blade having a main portion of thin planer material with a mounting edge and an opposing free edge substantially spaced from said mounting edge, said cleaning blade further having a cleaning tip portion comprising a body of elastomer material Mounted to said free edge of said main portion substantially spaced from said mounting edge, said main portion being resiliently flexible only perpendicular said planar dimensions thereof, and being cantilever mounted by blade mounting means at said mounting edge of said main portion, and extending generally parallel to said photoreceptor surface for substantial resilience only in a direction toward or away from said photoreceptor surface, said cleaning blade being mounted to project toward the direction of motion of said photoreceptor surface when in cleaning engagement therewith to provide a chiseling cleaning engagement of said cleaning tip against said surface, and means for pressing said tip portion of said cleaning blade into substantially uniform cleaning engagement with said photoreceptor surface, including an independent backing blade member cantilever mounted independently from said main portion of said cleaning blade, said backing blade having a free edge resiliently engaging said cleaning tip portion to uniformly support and urge said cleaning tip portion against said photoreceptor.
Claim 3
Dependent Claim
38 words
The cleaning system of claim 1 wherein said backing blade free edge abuts and supports a substantial area of said cleaning tip portion and extends to at least closely adjacent to the end of said cleaning tip portion.
Claim 4
Dependent Claim
27 words
The cleaning system of claim 2 wherein said backing blade is a conductive metal and is electrically grounded to provide an electrical discharge for said cleaning tip.
Claim 5
Dependent Claim
35 words
The cleaning system of claim 2 wherein said elastomer material of said cleaning tip portion provides an elastomeric resilient pad between said backing blade free edge and said free edge of said blade main portion.
Claim 6
Dependent Claim
36 words
The cleaning system of claim 2 wherein said backing blade is conductive and provides a conductive path to the end of said cleaning tip portion for controlling electrical charges at the end of said cleaning tip.
Claim 7
Dependent Claim
35 words
The cleaning system of claim 1 wherein said backing blade is cantilever mounted in the same blade mounting means as said blade main portion and is substantially coextensive in length with said blade main portion.
Claim 8
Dependent Claim
23 words
The cleaning system of claim 1 wherein said free edge of said backing blade abuts said elastomer material of said cleaning tip portion.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |