US4512658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copier
Assignee: Hoechst AG
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Filing: 1983-04-15
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Granted: 1985-04-23
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Expires: 2003-04-15
Abstract
Abstract The present invention relates to an electrophotographic copier for the repetitive copying of originals. The copier comprises a transport apparatus having two film webs for transporting the original through an exposing station with the original being inserted between these film webs. The film webs of the transport apparatus are securely bonded together along a strip and form in the entry zone in advance of the exposing station a single-sided, Y-shaped pocket for the positioning of the leading edge of the original against the joint seam of the two film webs.
Inventors
- 👤 Detlef Winkelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G15/602
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
An electrophotographic copier, comprising: an exposing station having an entry zone with an entry plane on which an original to be copied is introduced into said entry zone; and transport means for repetitively transporting an original through said exposing station from said entry zone, said transport means comprising: two film webs bonded at a joint seam to form a Y-shaped pocket for receiving a leading edge of an original to be copied, said Y-shaped pocket being positioned in said entry zone to receive an original to be copied from said entry plane; and means for closing said Y-shaped pocket on an original and drawing said film webs past said exposing station from said entry zone.
Claim 2
Dependent Claim
115 words
An electrophotographic copier, comprising: an exposing station having an entry zone with an entry plane on which an original to be copied is introduced into said entry zone; and transport means for repetitively transporting an original through said exposing station from said entry zone, said transport means comprising: two film webs bonded at a joint seam to form a Y-shaped pocket for receiving a leading edge of an original to be copied, said Y-shaped pocket being positioned in said entry zone to receive an original to be copied from said entry plane; and means for closing said Y-shaped pocket on an original and drawing said film webs past said exposing station from said entry zone.
Claim 3
Dependent Claim
32 words
The electrophotographic copier as set forth in claim 1, wherein said joint seam extends transversely across the direction of movement of said film webs when they are drawn past said exposing station.
Claim 4
Dependent Claim
33 words
The electrophotographic copier as set forth in claim 1, including two film supply rollers, a portion of each of said film webs being wound onto a different one of said film supply rollers.
Claim 5
Dependent Claim
63 words
The electrophotographic copier as set forth in claim 3, wherein one of said film supply rollers is positioned above said entry plane and the other film supply roller is arranged below said entry plane, and further wherein said means for closing said Y-shaped pocket includes means for directing film webbing from said film supply rollers into a V shape in said entry zone.
Claim 6
Dependent Claim
30 words
The electrophotographic copier as set forth in claim 4, and further including means for prestressing said film supply rollers against the direction in which said film webs are drawn off.
Claim 7
Dependent Claim
27 words
The electrophotographic copier as set forth in claim 3, further including a take-up roller positioned to wind up said film webs after passing through said exposing station.
Claim 8
Dependent Claim
27 words
The electrophotographic copier as set forth in claim 6, wherein said take-up roller has a diameter greater than the diameter of either of said film supply rollers.
Claim 9
Dependent Claim
47 words
The electrophotographic copier as set forth in claim 7, including a photoconductor surface, means for moving said photoconductor surface through said exposing station, and means for rotating said take-up roller at a constant angular velocity and at a peripheral speed equal to that of said photoconductor surface.
Claim 10
Dependent Claim
25 words
The electrophotographic copier as set forth in claim 7, wherein said take-up roller diameter is 3 to 5 times greater than said supply roller diameters.
Claim 11
Dependent Claim
54 words
The electrophotographic copier as set forth in claim 8, including a drum, said photoconductor surface being attached to a surface of said drum, said two film supply rollers and said take-up roller being positioned on the same side of said drum and said take-up roller being positioned below one of said film supply rollers.
Claim 12
Dependent Claim
44 words
The electrophotographic copier as set forth in claim 3, including a common drive system for said film supply rollers including means for reversing the direction of rotation of said film supply rollers after an original to be copied has passed through said exposing station.
Claim 13
Dependent Claim
68 words
The electrophotographic copier as set forth in claim 3, including a drum and a photoconductor surface on said drum, and means for moving said photoconductor surface through said exposing station, and further including an exit device positioned on the same side of said drum as said entry plane, said exit device including means for removing an original from said film webs towards one of said film supply rollers.
Claim 14
Dependent Claim
50 words
The electrophotographic copier as set forth in claim 8, including a drum, said photoconductor surface being attached to a surface of said drum and wherein said film supply rollers are arranged on one side of said drum and said take-up roller is arranged on an opposite side of said drum.
Claim 15
Dependent Claim
57 words
The electrophotographic copier as set forth in claim 6, wherein a pair of drive rollers are positioned between said exposing station and said take-up roller with said film webs being disposed between said drive rollers, and including means for rotating said drive rollers at a peripheral speed which is synchronous with the speed of said photoconductor surface.
Claim 16
Dependent Claim
61 words
The electrophotographic copier as set forth in claim 3, including a drum and a photoconductor surface on said drum, and means for moving said photoconductor surface through said exposing station, and further including an exit device positioned on the opposite side of said drum from said entry plane, said exit device including means for removing an original from said film webs.
Claim 17
Dependent Claim
52 words
The electrophotographic copier as set forth in claim 1, including a first pair of upper blades positioned on one side of said exposing station to bear against said film webs, and a second set of wiper blades positioned on an opposite side of said exposing station to bear against said film webs.
Claim 18
Dependent Claim
51 words
The electrophotographic copier as set forth in claim 1, wherein one of said film webs is an endless belt and the other of said film webs is a tongue fastened to said endless belt and having a length at least equal to the length of the smallest original to be copied.
References Cited (Backward Citations)
US3659935A
Cited
DE2026063A1
Cited
US3614090A
Cited
DE1946037A1
Cited
FR2277370A1
Cited
US4057348A
Cited
US4068948A
Cited
DE2828629A1
Cited
US4158886A
Cited
US4235431A
Cited
US4320963A
Cited
US4286869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |