Patent US4597660A successfully refreshed from Google Patents.
US4597660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed copying machine
Assignee: Fujifilm Business Innovation Corp
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Filing: 1982-03-09
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Granted: 1986-07-01
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Expires: 2002-03-09
Abstract
Abstract A high speed copying machine transports a sheet from a sheet stack to a stop gate at very high speed, and then transports the sheet from the stop gate to a transfer point on the drum at a speed matching the peripheral speed of the drum. The time required to rotate a point on the drum from the exposure position to the transfer point is actually greater than the time required to transport a sheet from the sheet stack to the stop gate, which is very near the transfer point.
Inventors
- 👤 Svay Leng
- 👤 Saburo Suganuma
- 👤 Hiroyuki Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; G03G2215/00; G03G2215/00362; G03G2215/00919; G03G2215/00945
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A high speed copying machine, comprising: a photo-sensitive drum having a transfer point thereon; a sheet containing tray; releasable stop means provided between said tray and said transfer point; first feed means for conveying sheets from said stop means along a predetermined sheet conveying path to said transfer point on said photo-sensitive drum at a speed equal to the peripheral speed of said drum; and second feed means for conveying sheets from said tray to said stop means at a speed greater than the peripheral speed of said drum to ensure positioning of a sheet against said stop means prior to release of said stop means when movement of a sheet from said tray and movement of said transfer points are initiated simultaneously.
Claim 2
Dependent Claim
123 words
A high speed copying machine, comprising: a photo-sensitive drum having a transfer point thereon; a sheet containing tray; releasable stop means provided between said tray and said transfer point; first feed means for conveying sheets from said stop means along a predetermined sheet conveying path to said transfer point on said photo-sensitive drum at a speed equal to the peripheral speed of said drum; and second feed means for conveying sheets from said tray to said stop means at a speed greater than the peripheral speed of said drum to ensure positioning of a sheet against said stop means prior to release of said stop means when movement of a sheet from said tray and movement of said transfer points are initiated simultaneously.
Claim 3
Dependent Claim
39 words
A copying machine as claimed in claim 1, further comprising a charge corotron and a developing unit arranged along the outer wall of said drum and in the direction of rotation of said drum, prior to said transfer point.
Claim 4
Dependent Claim
21 words
A copying machine as claimed in claim 2, further comprising exposure slit means arranged between said corotron and said developing unit.
Claim 5
Dependent Claim
32 words
A copying machine as claimed in claim 1, wherein said first feed means is composed of a pair of rolls arranged immediately upstream of said transfer point on said sheet conveying path.
Claim 6
Dependent Claim
34 words
A copying machine as claimed in claim 4, said stop means comprising a stop gate arranged upstream of said drum and immediately upstream of said pair of rolls for feeding sheets to said drum.
Claim 7
Dependent Claim
21 words
A copying machine as claimed in claim 1, further comprising a pair of slip rolls provided upstream of said stop means.
Claim 8
Dependent Claim
18 words
A copying machine as claimed in claim 5, further comprising slip rolls provided upstream of said stop gate.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |