US4958197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning blade with a surface active antistatic agent
Assignee: Kao Corp
•
Filing: 1988-10-26
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Granted: 1990-09-18
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Expires: 2008-10-26
Abstract
Abstract A long life cleaning blade for image forming apparatus is formed of a rubber elastomer which contains, or has adhered on the surface thereof, an antistatic agent in an amount effective to prevent electrification.
Inventors
- 👤 Hiroshi Kinashi
- 👤 Itaru Kawabata
- 👤 Hidenobu Yamane
- 👤 Yoshiharu Tsujimoto
- 👤 Shinya Gotoh
- 👤 Masayoshi Nawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0017
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
A cleaning blade for an image forming apparatus that includes an image-receiving photosensitive surface into contact with which the blade is movable for cleaning toner from the photosensitive surface, said cleaning blade comprising: a rubber elastomer; and a surface active antistatic agent forming a unitary part of said blade and disposed for contact with the photosensitive surface when said blade is moved into contact with said photosensitive surface so as to prevent an accumulation of electric charges on said cleaning blade and thereby facilitate maintenance of a layer of toner particles on said blade for imparting to the blade sufficient lubrication to minimize damage to the blade as the blade contacts the photosensitive surface.
Claim 2
Dependent Claim
114 words
A cleaning blade for an image forming apparatus that includes an image-receiving photosensitive surface into contact with which the blade is movable for cleaning toner from the photosensitive surface, said cleaning blade comprising: a rubber elastomer; and a surface active antistatic agent forming a unitary part of said blade and disposed for contact with the photosensitive surface when said blade is moved into contact with said photosensitive surface so as to prevent an accumulation of electric charges on said cleaning blade and thereby facilitate maintenance of a layer of toner particles on said blade for imparting to the blade sufficient lubrication to minimize damage to the blade as the blade contacts the photosensitive surface.
Claim 3
Dependent Claim
26 words
A cleaning blade in accordance with claim 1, wherein said blade is formed of a mixture of said rubber elastomer and said surface active antistatic agent.
Claim 4
Dependent Claim
50 words
A cleaning blade in accordance with claim 1, wherein said blade comprises a body formed of said rubber elastomer, said body having an outer surface, and a layer of said surface active antistatic agent unitarily carried on and adhered to said body outer surface for contact with the photosensitive surface.
Claim 5
Dependent Claim
18 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent comprises a non-ionic surface active agent.
Claim 6
Dependent Claim
18 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent comprises an anionic surface active agent.
Claim 7
Dependent Claim
18 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent comprises a cationic surface active agent.
Claim 8
Dependent Claim
18 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent comprises an amphoteric surface active agent.
Claim 9
Dependent Claim
19 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent comprises an electroconductive resinous surface active agent.
Claim 10
Dependent Claim
32 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent has a molecular weight in the range of approximately 150 to 3000 and a HLB of at least approximately 2.5.
Claim 11
Dependent Claim
35 words
A cleaning blade in accordance with claim 1, wherein said antistatic agent has a molecular weight in the range of approximately 200 to 600 and a HLB in the range of approximately 5 to 19.
Claim 12
Dependent Claim
32 words
A cleaning blade in accordance with claim 2, wherein said antistatic agent is contained in said blade in an amount in the range of approximately 0.1 to 10 parts by weight (PHR).
Claim 13
Dependent Claim
32 words
A cleaning blade in accordance with claim 2, wherein said antistatic agent is contained in said blade in an amount in the range of approximately 1 to 5 parts by weight (PHR).
Claim 14
Dependent Claim
33 words
A cleaning blade in accordance with claim 3, wherein said antistatic agent is carried on said blade outer surface in an amount in the range of approximately 20 to 50 mg/m 2 .
Claim 15
Dependent Claim
23 words
A cleaning blade in accordance with claim 1, wherein said cleaning blade has a rubber hardness in the range of 60 to 80°.
References Cited (Backward Citations)
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US3871762A
Cited
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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) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |