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EP0232064A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrostatic photographic apparatus
Assignee: Toshiba Tec Corp
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Filing: 1987-01-21
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Granted: —
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Expires: 2007-01-21
Abstract
Abstract An electrostatic photographic apparatus according to the present invention comprises a lower unit, an upper unit connected for opening and closing motion to the lower unit and carrying a light source and a paper receiver thereon, a developing unit including a holding member on which a photosensitive member, a developer and a cleaning mechanism are mounted, supporting means located on the lower unit for positioning the developing unit and for removably supporting the developing unit in a vertical direction thereon, and pressing means located on the upper unit for pressing against the developing unit supported on the supporting means, whereby various mechanical components are shared by the lower unit and the upper unit. Accordingly, disassembling of the developing unit for maintenance and releasing of paper jamming can be achieved readily.
Inventors
- 👤 Harutaro Ohba
- 👤 Seiji Sugimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
G; G03; G03G; G03G13/00; G03G21/00; G03G21/16; G03G21/1604; G03G21/1623; G03G21/1638; G03G15/00; G03G21/1628; G03G21/1642; G03G21/1647; G03G21/1661; G03G21/1676; G03G2221/00; G03G2221/16; G03G2221/1639; G03G2221/1651; G03G2221/1654; G03G2221/1672; G03G2221/1675; G03G2221/1678; G03G2221/1687; G03G2221/18; G03G2221/183; G03G2221/1853
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
An electrostatic photographic apparatus comprising: a lower unit which includes a cassette case in which paper is held in a layered condition; an upper unit connected for pivotal motion around an end of said lower unit and having at least a paper receiver thereon; a developing unit including a holding member on which at least a photosensitive member, a developer and a cleaning mechanism are mounted; supporting means provided on said lower unit for positioning said developing unit and for removably supporting said developing unit in a vertical direction thereon; and pressing means provided on said upper unit for pressing said developing unit against said supporting means when said upper unit is closed to said lower unit.
Claim 2
Dependent Claim
117 words
An electrostatic photographic apparatus comprising: a lower unit which includes a cassette case in which paper is held in a layered condition; an upper unit connected for pivotal motion around an end of said lower unit and having at least a paper receiver thereon; a developing unit including a holding member on which at least a photosensitive member, a developer and a cleaning mechanism are mounted; supporting means provided on said lower unit for positioning said developing unit and for removably supporting said developing unit in a vertical direction thereon; and pressing means provided on said upper unit for pressing said developing unit against said supporting means when said upper unit is closed to said lower unit.
Claim 3
Dependent Claim
85 words
Apparatus as claimed in claim 1 characterised in that a fixing device includes a heating drive roller and a pressure roller, said heating drive roller being mounted on one of said lower unit and said upper unit while said pressure roller is mounted on the other of said lower unit and said upper unit whereby said heating drive roller and said pressure roller are engaged with or disengaged from each other in response to pivotal motion of said upper unit relative to said lower unit.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 1 or claim 2 wherein said pressing means includes spring means for resiliently urging said developing unit against said supporting means.
Claim 5
Dependent Claim
37 words
Apparatus according to any preceding claim characterised in that said cleaning mechansim is fixedly mounted on said holding member of said developing unit while said photosensitive member and said developer are removably mounted on said holding member.
Claim 6
Dependent Claim
50 words
Apparatus as claimed in any preceding claim characterised in that said photosensitive member and said developer are removably supported on said holding member from above, and said pressing means includes a pressing member for pressing against a shaft of said photosensitive member, and a spring for pressing against said developer.
Claim 7
Dependent Claim
125 words
Apparatus as claimed in claim 5 characterised by further comprising a pair of exfoliating tapes located between said photosensitive drum and a sheet of paper guided by said photosensitive drum and extending along opposite edges of the sheet of paper, said holding member having a pair of opposite side walls in each of which a slot for receiving a shaft of said photosensitive drum for rotation therein is formed such that said shaft of said photosensitive drum may be put into said slots in a direction along said exfoliating tapes from remote ends of said side walls of said holding member from said cleaning mechanism said side walls of said holding member having holding means for holding and pulling opposite ends of said exfoliating tapes.
Claim 8
Dependent Claim
52 words
Apparatus as claimed in claim 6 characterised in that said exfoliating tapes are stretched between two pairs of said holding means each via a tension spring, one of said holding means in each of the two pair being mounted for pivotal motion in a direction toward and away from said photosensitive member.
Claim 9
Dependent Claim
23 words
Apparatus as claimed in any preceding claim characterised in that a light source is located in said lower unit and/or said upper unit.
Claim 10
Dependent Claim
38 words
Apparatus as claimed in any preceding claim including coupling means mounted on said upper unit for selectively coupling said developing unit supported on said supporting means to said upper unit; and operating means for operating said coupling means.
Claim 11
Dependent Claim
41 words
Apparatus as claimed in claim 9, wherein said coupling means includes a hanging lever which is displaceable to connect to said developing unit, and said operating means is constituted to displace said hanging lever to selectively retreat from said developing unit.
Claim 12
Dependent Claim
59 words
Apparatus as claimed in claim 10, wherein said developing unit has a projection formed thereon, and said hanging lever is constituted to be urged toward and into engagement with said projection of said developing unit while said operating means is constituted such that it may press said hanging lever to displace in a direction to disengage from said projection.
Claim 13
Dependent Claim
59 words
Apparatus according to any preceding claim characterised in that said supporting means has recesses for removably supporting thereon a shaft of said photosensitive member and said developer from above, and further comprising pressing means including a pressing member for pressing against said shaft of said photosensitive member, said pressing means further including a spring for pressing against said developer.
References Cited (Backward Citations)
No citation records indexed.
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