US3766592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum cleaning device for an electrophotographic duplicator
Assignee: Fujifilm Business Innovation Corp
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Filing: 1971-12-02
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Granted: 1973-10-23
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Expires: 1991-12-02
Abstract
Abstract A drum cleaning device for an electrophotographic duplicator including (1) web core supporting shafts disposed substantially parallel to the axis of the drum, (2) a pressure roller, (3) winder shafts, the web being connected from the web core supporting shafts to the winder shafts via the pressure roller which presses the web to the drum to thereby clean the surface of the drum, (4) first and second side plates between which are connected the web core supporting shafts, the pressure roller, and the winder shafts so as to constitute a cleaning unit, and (5) means for removably mounting the cleaning unit with respect to the drum so that the entire cleaning unit can be operatively positioned with respect to the drum or removed therefrom for maintenance.
Inventors
- 👤 K Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
In drum cleaning device for an electrophotographic duplicator having web core supporting shafts disposed substantially parallel to the axis of the drum, a pressure roller and winder shafts, the web being connected from said web core supporting shafts to said winder shafts via said pressure roller which presses said web to said drum to thereby clean the surface of said drum, the improvement comprising first and second side plates between which are connected said web core supporting shafts, said pressure roller, and said winder shafts so as to constitute a cleaning unit; and means for rotatably and slidably mounting said cleaning unit with respect to said drum so that the entire cleaning unit can be operatively positioned with respect to said drum or removed therefrom for maintenance.
Claim 2
Dependent Claim
127 words
In drum cleaning device for an electrophotographic duplicator having web core supporting shafts disposed substantially parallel to the axis of the drum, a pressure roller and winder shafts, the web being connected from said web core supporting shafts to said winder shafts via said pressure roller which presses said web to said drum to thereby clean the surface of said drum, the improvement comprising first and second side plates between which are connected said web core supporting shafts, said pressure roller, and said winder shafts so as to constitute a cleaning unit; and means for rotatably and slidably mounting said cleaning unit with respect to said drum so that the entire cleaning unit can be operatively positioned with respect to said drum or removed therefrom for maintenance.
Claim 3
Dependent Claim
55 words
cam means for holding said cleaning unit in a first position so that said pressure roller operatively engages said drum and for permitting rotation of said cleaning unit to a second position removed from said drum so that said cleaning unit may be slid along said support shaft away from said drum for maintenance thereof.
Claim 4
Dependent Claim
55 words
cam means for holding said cleaning unit in a first position so that said pressure roller operatively engages said drum and for permitting rotation of said cleaning unit to a second position removed from said drum so that said cleaning unit may be slid along said support shaft away from said drum for maintenance thereof.
Claim 5
Dependent Claim
139 words
In drum cleaning device for an electrophotographic duplicator having web core supporting shafts disposed substantially parallel to the axis of the drum, a pressure roller and winder shafts, the web being connected from said web core supporting shafts to said winder shafts via said pressure roller which presses said web to said drum to thereby clean the surface of said drum, the improvement comprising first and second side plates between which are connected said web core supporting shafts, said pressure roller, and said winder shafts so as to constitute a cleaning unit; and means for removably mounting said cleaning unit with respect to said drum so that the entire cleaning unit can be operatively positioned with respect to said drum or removed therefrom for maintenance, said means for removably mounting the cleaning unit with respect to the drum including:
Claim 6
Dependent Claim
139 words
In drum cleaning device for an electrophotographic duplicator having web core supporting shafts disposed substantially parallel to the axis of the drum, a pressure roller and winder shafts, the web being connected from said web core supporting shafts to said winder shafts via said pressure roller which presses said web to said drum to thereby clean the surface of said drum, the improvement comprising first and second side plates between which are connected said web core supporting shafts, said pressure roller, and said winder shafts so as to constitute a cleaning unit; and means for removably mounting said cleaning unit with respect to said drum so that the entire cleaning unit can be operatively positioned with respect to said drum or removed therefrom for maintenance, said means for removably mounting the cleaning unit with respect to the drum including:
Claim 7
Dependent Claim
28 words
The improvement in claim 2 where said cleaning unit includes a hollow cylindrical shaft connected between said first and second plates and concentrically mounted on said support shaft.
Claim 8
Dependent Claim
68 words
The improvement as in claim 2 where said cam means includes at least two cams mounted on a rotatable cam shaft, said cams being respectively mounted adjacent said first and second plates, each of said cams including a portion disposed against the side of its associated plate to prevent lateral movement of said cleaning unit along said support shaft when said cleaning unit is in said first position.
Claim 9
Dependent Claim
30 words
The improvement as in claim 2 including a removable stay for supporting one end of said support shaft to facilitate the removal of said cleaning unit from said support shaft.
References Cited (Backward Citations)
US3526457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |