EP0139448A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrophotographic copier
Assignee: Panasonic Holdings Corp
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Filing: 1984-09-07
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Granted: —
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Expires: 2004-09-07
Abstract
Abstract An electrophotographic copier comprises a photosensitive belt supported on first and second rollers and driven thereby, a development unit, a transfer corotron, and an exposure unit. The development unit is disposed adjacent to the first roller, and the transfer corotron is positioned on one side of a line connecting the first and second rollers, while the exposure unit is positioned on the other side of the line.
Inventors
- 👤 Yoshihito Urata
- 👤 Toshiharu Sasaki
- 👤 Yoshihiro Yokoyama
- 👤 Yoichi Sekine
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/14; G03G21/145
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
An electrophotographic copier comprising: at least first and second roller means; a photosensitive belt trained around said first and second roller means and drivable to travel in one direction; development means disposed adjacent to said first roller means: exposure means disposed on one side of a line connecting said first and second roller means; and transfer means disposed on the other side of said line for transferring an image developed by said development means from the photosensitive belt to a tansfer member.
Claim 2
Dependent Claim
82 words
An electrophotographic copier comprising: at least first and second roller means; a photosensitive belt trained around said first and second roller means and drivable to travel in one direction; development means disposed adjacent to said first roller means: exposure means disposed on one side of a line connecting said first and second roller means; and transfer means disposed on the other side of said line for transferring an image developed by said development means from the photosensitive belt to a tansfer member.
Claim 3
Dependent Claim
87 words
An electrophotographic copier according to claim 1, wherein said transfer means is disposed along a photosensitive surface of said photosensitive belt travelling from said first roller means to said second roller means, said second roller means having a roller, further including a discharge pasage for the transfer member, extending substantially tangentially to said roller of said second roller means, so that said transfer member will be separated by its own rigidity from the photosensitive belt as it travels around said roller and enters into said discharge passage.
Claim 4
Dependent Claim
35 words
3 . An electrophotographic copier according to claim 2, wherein said second roller means has a diameter of 20 mm at most and said first roller means has a diameter of 20 mm at least.
Claim 5
Dependent Claim
46 words
An electtophotographic copier according to claim 2 , wherein said transfer means comprises a corotron for charging said photosensitive belt when the photosensitive belt makes a first rotation and for transferring said developed image to said transfer member when the photosensitive belt makes a second rotation.
Claim 6
Dependent Claim
101 words
An electrophotographic copier according to claim 1, including cleaning means and discharging means, said transfer means comprising a corotron, said exposure means, said cleaning means, said discharging means, said development means, and said corotron being arranged in the order named in the direction in which said photosensitive belt is moved and positioned in confronting relation to said photosensitive belt, the arrangement being such that said photosensitive belt will be uniformly charged by said corotron when said photosensitive belt makes a first rotaion, and the developed image will be transferred to said transfer member when said photosensitive belt makes a second rotation.
Claim 7
Dependent Claim
54 words
An electrophotographic copier according to claim 1, including cleaning means for removing non-transferred toner remaining on said photosensitive belt, said cleaning means being disposed upstream of said development means in the direction in which said photosensitive belt travels for delivering the removed non-transferred toner on and with said photosensitive belt into said development means.
Claim 8
Dependent Claim
50 words
7 . An electrophotographic copier according to claim 6 , wherein said cleaning means is intermittently controlled in an operative mode in which the cleaning means removes the toner from said photosensitive belt and an inoperative mode in which the removed toner is delivered on and with said photosensitive belt.
Claim 9
Dependent Claim
40 words
8: An electrophotographic copier according to claim 7, wherein said cleaning means comprises a cleaning blade for contacting said photosensitive belt to scrape the toner, said cleaning blade being intermittently brought into and out of contact with said photosensitive belt.
Claim 10
Dependent Claim
26 words
An electrophotographic copier according to claim 1, including detecting means on and inwardly of said photosensitive belt for detecting the angular displacement of said photosensitive belt.
Claim 11
Dependent Claim
60 words
An electrophotographic copier according to claim 9, wherein said detecting means comprises markings placed on a reverse side of said photosensitive belt and a photocoupler disposed so as to confront said markings and composed of a light-emitting element and a photodetector which are constructed as a unit for detecting the difference between reflectivities of the photosensitive belt and said markings.
Claim 12
Dependent Claim
26 words
11 , An electrophotographic copier according to claim 10, wherein said detecting means is disposed substantially centrally of said photosensitive belt in the transverse direction thereof.
Claim 13
Dependent Claim
45 words
An electrophotographic copier according to claim 1, wherein said transfer means comprises a corotron for charging said photosensitive belt when the photosensitive belt makes a first rotation and for transferring said developed image to said transfer member when the photosensitive belt makes a second rotation.
References Cited (Backward Citations)
No citation records indexed.
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