US4314756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning device
Assignee: Canon Inc
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Filing: 1979-08-30
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Granted: 1982-02-09
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Expires: 1999-08-30
Abstract
Abstract This invention provides a cleaning device for an image bearing member which is able to effect a good cleaning without scattering removed developer. The device includes an elastic cleaning blade contacting the image bearing member, hood means covering the vicinity of the portion where the blade contacts the surface of the image bearing member, suction means and guiding means for guiding an air flow to strike against said blade contacting portion.
Inventors
- 👤 Joji Amitani
- 👤 Takashi Ito
- 👤 Kazuhiro Hirayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:43
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade contacting the image bearing member, hood means for covering the vicinity where the blade bears against the image bearing member, means for creating a suction within said hood means, and means for guiding air flow to strike against said blade bearing portion, said air flow guiding means having a sheet like member which is of a flexible material.
Claim 2
Dependent Claim
76 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade contacting the image bearing member, hood means for covering the vicinity where the blade bears against the image bearing member, means for creating a suction within said hood means, and means for guiding air flow to strike against said blade bearing portion, said air flow guiding means having a sheet like member which is of a flexible material.
Claim 3
Dependent Claim
32 words
A cleaning device according to claim 1, in which the flexible sheet like member is disposed to bear against the surface of the image bearing member when said suction means is inoperative.
Claim 4
Dependent Claim
31 words
A cleaning device according to claim 2, in which the flexible sheet like member has a low friction property at least at its portion which bears against the image bearing member.
Claim 5
Dependent Claim
85 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade disposed against the moving direction of the image bearing member, a hood means to cover the vicinity where the blade bears against the image bearing member, a suction means connected with the hood means, and means for guiding air flow to strike the blade bearing portion which is disposed at the end portion of the hood means upstream of the image bearing member in said moving direction.
Claim 6
Dependent Claim
85 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade disposed against the moving direction of the image bearing member, a hood means to cover the vicinity where the blade bears against the image bearing member, a suction means connected with the hood means, and means for guiding air flow to strike the blade bearing portion which is disposed at the end portion of the hood means upstream of the image bearing member in said moving direction.
Claim 7
Dependent Claim
19 words
A cleaning device according to claim 4, in which said air flow guide means includes a sheet like member.
Claim 8
Dependent Claim
18 words
A cleaning device according to claim 5, in which the sheet like member is of a flexible material.
Claim 9
Dependent Claim
32 words
A cleaning device according to claim 6, in which the flexible sheet like member is disposed to bear against the surface of the image bearing member when said suction means is operative.
Claim 10
Dependent Claim
31 words
A cleaning device according to claim 7, in which the flexible sheet like member has a low friction property at least at its portion which bears against the image bearing member.
Claim 11
Dependent Claim
122 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade disposed against the moving direction of the image bearing member and bearing against the surface of the image bearing member, a hood means having an opening facing the vicinity of a portion of the blade which bears against the image bearing member, the edge of the opening downstream of the image bearing member in said moving direction bearing against the blade, a suction means connected to the hood means, and a guiding means connected to an edge of the opening of the hood means upstream of the image bearing member in said moving direction and for guiding air flow toward the blade bearing portion.
Claim 12
Dependent Claim
122 words
A cleaning device for removing developer remaining on an image bearing member, which comprises an elastic cleaning blade disposed against the moving direction of the image bearing member and bearing against the surface of the image bearing member, a hood means having an opening facing the vicinity of a portion of the blade which bears against the image bearing member, the edge of the opening downstream of the image bearing member in said moving direction bearing against the blade, a suction means connected to the hood means, and a guiding means connected to an edge of the opening of the hood means upstream of the image bearing member in said moving direction and for guiding air flow toward the blade bearing portion.
Claim 13
Dependent Claim
19 words
A cleaning device according to claim 9, in which said air flow guiding means comprises a sheet like member.
Claim 14
Dependent Claim
30 words
A cleaning device according to claim 10, in which said sheet like member is constituted to keep an uniform clearance between it and the surface of the image bearing member.
Claim 15
Dependent Claim
18 words
A cleaning device according to claim 9, in which said sheet like member is of a flexible material.
Claim 16
Dependent Claim
33 words
A cleaning device according to claim 12, in which said sheet like member is disposed contactable with the surface of the image bearing member when said suction means is in a non-operable state.
Claim 17
Dependent Claim
29 words
A cleaning device according to claim 13, in which said sheet like member has a low friction property at least at its portion which contacts the image bearing member.
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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |