US4298278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detachably attaching a master sheet to a drum
Assignee: Konica Minolta Inc
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Filing: 1980-02-22
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Granted: 1981-11-03
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Expires: 2000-02-22
Abstract
Abstract In a copying machine having a drum of the type in which a master sheet is detachably attached to the periphery of the drum, the improvement comprising a rotary shaft for supporting the drum, clutch means provided between the drum and a driving member for rotating the drum, a pair of fastening members mounted on the drum for attaching both ends of the master sheet onto the drum, wherein at least one of fastening members is moved from a fastening condition to removing condition by the relative displacement of the drum and the driving member.
Inventors
- 👤 Hiroshi Katakura
- 👤 Takashi Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:39
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/12; B41F27/1218; B41L; B41L29/00; B41L29/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
In a copying machine having a drum of the type in which a master sheet is detachably attached to the periphery of the drum, the machine which comprising; a rotary shaft connected to a drive member for supporting the drum; clutch means being provided between the drum and the drive member for rotating the drum so that the drum and the drive member undergo displacement relative to each other; a pair of fastening members mounted on the drum, movably, for attaching both ends of the master sheet onto the drum; wherein at least one of fastening members is moved from a fastening condition to removing condition by the relative displacement of the drum and the drive member.
Claim 2
Dependent Claim
117 words
In a copying machine having a drum of the type in which a master sheet is detachably attached to the periphery of the drum, the machine which comprising; a rotary shaft connected to a drive member for supporting the drum; clutch means being provided between the drum and the drive member for rotating the drum so that the drum and the drive member undergo displacement relative to each other; a pair of fastening members mounted on the drum, movably, for attaching both ends of the master sheet onto the drum; wherein at least one of fastening members is moved from a fastening condition to removing condition by the relative displacement of the drum and the drive member.
Claim 3
Dependent Claim
35 words
A device for detachably attaching a master sheet onto a drum according to claim 1, wherein the clutch means comprises a cam secured to the drive member and a cam follower mounted on the drum.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |