EP0136902A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrophotographic apparatus comprising photosensitive layer of amorphous silicon type photoconductor
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1984-09-28
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Granted: —
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Expires: 2004-09-28
Abstract
Abstract Disclosed is an electrophotographic apparatus comprising a photosensitive drum comprising an amorphous silicon type photoconductor layer formed on an electro-conductive substrate, a main charging mechanism for charging the surface of the drum with charges having a predetermined polarity, an imagewise exposure mechanism for forming an electrostatic image corresponding to an image of an original on the surface of the drum, a toner development mechanism for forming a toner image corresponding to the electrostatic image, a toner image transfer mechanism for transferring the toner image formed on the surface of the photosensitive drum to a predetermined paper sheet, a toner cleaning mechanism for removing the residual toner adhering to the surface of the photosensitive drum and a fixing mechanism for fixing the transferred toner image to said paper sheet, wherein a heating mechanism is arranged to heat the surface of the photosensitive drum at a temperature of 30 to 40°C. The problem of the flow of an image inherent to the use of an amorphous silicon type photoconductive layer is effectively solved if this electrophotographic apparatus is employed.
Inventors
- 👤 Nobuhiro Miyakawa
- 👤 Teruaki Higashiguchi
- 👤 Koji Yano
- 👤 Kazuo Yamamoto
- 👤 Yoshinobu Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 07:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/751; G03G21/00; G03G21/20; G03G21/203; G03G21/206
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
An electrophotographic apparatus including a photosensitive drum comprising an amorphous silicon type photoconductor layer on an electroconductive substrate, characterised by a mechanism to heat the surface of the photosensitive drum to a temperature of 30 to 40°C.
Claim 2
Dependent Claim
37 words
An electrophotographic apparatus including a photosensitive drum comprising an amorphous silicon type photoconductor layer on an electroconductive substrate, characterised by a mechanism to heat the surface of the photosensitive drum to a temperature of 30 to 40°C.
Claim 3
Dependent Claim
147 words
An electrophotographic apparatus comprising a photosensitive drum comprising an amorphous silicon type photoconductor layer formed on an electroconductive substrate, a main charging mechanism for charging the surface of the drum with charges having a predetermined polarity, an imagewise exposure mechanism for forming an electrostatic image corresponding to an image of an original on the surface of the drum, a toner development mechanism for forming a toner image corresponding to the electrostatic image, a toner image transfer mechanism for transferring the toner image formed on the surface of the photosensitive drum to a predetermined paper sheet, a toner cleaning mechanism for removing the residual toner adhering to the surface of the photosensitive drum and a fixing mechanism for fixing the transferred toner image to said paper sheet, wherein a heating mechanism is arranged to heat the surface of the photosensitive drum at a temperature of 30 to 40°C,
Claim 4
Dependent Claim
147 words
An electrophotographic apparatus comprising a photosensitive drum comprising an amorphous silicon type photoconductor layer formed on an electroconductive substrate, a main charging mechanism for charging the surface of the drum with charges having a predetermined polarity, an imagewise exposure mechanism for forming an electrostatic image corresponding to an image of an original on the surface of the drum, a toner development mechanism for forming a toner image corresponding to the electrostatic image, a toner image transfer mechanism for transferring the toner image formed on the surface of the photosensitive drum to a predetermined paper sheet, a toner cleaning mechanism for removing the residual toner adhering to the surface of the photosensitive drum and a fixing mechanism for fixing the transferred toner image to said paper sheet, wherein a heating mechanism is arranged to heat the surface of the photosensitive drum at a temperature of 30 to 40°C,
Claim 5
Dependent Claim
45 words
An electrophotographic apparatus as set forth in claim 1 or 2 wherein the heating mechanism is connected to a temperature-adjusting mechanism for detecting and/or increasing the surface temperature of the photosensitive drum and adjusting the surface temperature to 30 to 40°C, especially 35 to 40°C.
Claim 6
Dependent Claim
50 words
An electrophotographic apparatus as set forth in any of claims 1 to 3, wherein the or a fixing mechanism is a heat fixation mechanism and the heating mechanism feeds hot air to the photosensitive drum from the heat fixation mechanism to effect heating of the surface of the photosensitive drum.
Claim 7
Dependent Claim
128 words
An electrophotographic apparatus as set forth in claim 4, wherein a driving power-transmitting member is arranged on the circumferential end edge on one side of the photosensitive drum to transmit a driving power from a driving motor to the drum and drive and rotate the drum, the heating mechanism comprises a hollow shaft arranged to extend the hollow space of the photosensitive drum substantially at the center thereof in the longitudinal direction and a sucking member, one end of the shaft is connected to the heat fixation zone and the other end of the shaft is connected to the sucking member, and many small holes are formed on the circumferential surface of the hollow shaft and the interior hollow portion of the shaft is divided into two parts.
Claim 8
Dependent Claim
28 words
An electrophotographic apparatus as set forth in claim 4, wherein the heating mechanism feeds hot air from the heat fixation mechanism to the surface of the photosensitive drum.
Claim 9
Dependent Claim
26 words
An electrophotographic apparatus as set forth in claim 1,2 or 3 wherein the heating mechanism is a heater arranged in the interior of the photosensitive drum.
Claim 10
Dependent Claim
31 words
An electrophotographic apparatus as set forth in claim 1, 2 or 3 wherein the heating mechanism is a hot roller arranged in the vicinity of the surface of the photosensitive drum.
Claim 11
Dependent Claim
37 words
An electrophotographic apparatus as set forth in any of claims 2 to 8, wherein at the time of termination of the copying operation, the toner image transfer mechanism is intercepted from the amorphous silicon type photoconductive layer.
Claim 12
Dependent Claim
57 words
An electrophotographic apparatus as set forth in any of claims 2 to 8, wherein a transfer sheet- separating electricity-removing mechanism is arranged adjacently to the toner image transfer mechanism, and at the time of termination of the copying operation, the toner image transfer mechanism and/or the electricity-removing mechanism is intercepted from the amorphous silicon type photoconductive layer.
Claim 13
Dependent Claim
33 words
An electrophotographic apparatus as set forth in claim 7, wherein the heater arranged in the interior of the photosensitive drum is a film heater attached to the inner wall of the photosensitive drum.
Claim 14
Dependent Claim
33 words
An electrophotographic apparatus as set forth in claim 7, wherein the heater arranged in the interior of the photosensitive drum is a rod heater located on the rotation shaft of the photosensitive drum.
References Cited (Backward Citations)
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