Patent US1471672A successfully refreshed from Google Patents.
Patent US4127083A successfully refreshed from Google Patents.
US4127083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer sealing device for xerographic copying machine
Assignee: Fujifilm Business Innovation Corp
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Filing: 1977-11-18
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Granted: 1978-11-28
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Expires: 1997-11-18
Abstract
Abstract A sealing device is provided for sealing the gap between a rotatable photosensitive member and the housing of a cleaning or developing unit. The sealing device is a membrane sealing member attached at one end to the housing. The other end of the sealing member resiliently contacts the periphery of the photosensitive member when the photosensitive member is at rest. The sealing member has a relatively shallow angle of contact measured from a line parallel to the tangent to the periphery of the photosensitive member and is sufficiently flexible that air entrained by the rotation of the photosensitive member causes the sealing member to be floated from the surface of the photosensitive member.
Inventors
- 👤 Shinichi Sesoko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:55
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/007; G03G15/00; G03G15/06; G03G15/08; G03G15/0896; G03G15/0898
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
In a xerographic copying machine of the type having a rotatable photosensitive member and cleaning and developing units in close proximity to said photosensitive member, a sealing device for sealing the gap between the photosensitive member and the housings of said cleaning and developing units, said sealing device comprising a membrane sealing member attached at one end to a respective one of said housings, the other end of said membrane sealing member resiliently contacting the periphery of said photosensitive member when said photosensitive member is at rest, said sealing member being positioned at a shallow angle of contact measured from a line parallel to the tangent to the periphery of said photosensitive member and being sufficiently flexible that air entrained by the rotation of the photosensitive member causes said sealing member to be floated from the surface of said photosensitive member.
Claim 2
Dependent Claim
141 words
In a xerographic copying machine of the type having a rotatable photosensitive member and cleaning and developing units in close proximity to said photosensitive member, a sealing device for sealing the gap between the photosensitive member and the housings of said cleaning and developing units, said sealing device comprising a membrane sealing member attached at one end to a respective one of said housings, the other end of said membrane sealing member resiliently contacting the periphery of said photosensitive member when said photosensitive member is at rest, said sealing member being positioned at a shallow angle of contact measured from a line parallel to the tangent to the periphery of said photosensitive member and being sufficiently flexible that air entrained by the rotation of the photosensitive member causes said sealing member to be floated from the surface of said photosensitive member.
Claim 3
Dependent Claim
18 words
The sealing device recited in claim 1 wherein said membrane sealing member is made of a polyester film.
Claim 4
Dependent Claim
30 words
The sealing device recited in claim 2 wherein said polyester film is approximately 5 to 20 microns in thickness and has a free length of approximately 5 to 15 mm.
Claim 5
Dependent Claim
17 words
The sealing device recited in claim 1 wherein said shallow angle is between approximately 15° and 30°.
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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |