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71. 发明专利

JPH03175458A ELECTROPHOTOGRAPHIC COPYING DEVICE 失效
公开(公告)号：JPH03175458A
公开(公告)日：1991-07-30
申请号：JP31421889
申请日：1989-12-05
申请人： RICOH KK
发明人： ISHIKAWA TOYOJI , IKESUE MASUMI , KAWAISHI YASUNORI , MIURA MIKIO , SATO MITSURU
IPC分类号： G03G15/00 , G03G21/00 , G03G21/16
摘要： PURPOSE:To protect a belt photosensitive body and to make an image producing system kit thin by housing the seamless belt photosensitive body into a belt magazine together with a transfer charger. CONSTITUTION:The belt magazine 11 is constituted by integrating the flat seamless belt photosensitive body 15 and the transfer charger 16 among respective units needed for an electrophotographic copying process, and the magazine 11 and the other unit are provided so that they can be respectively separated. Besides, the photosensitive body 15 is turnably supported by plural rollers 12 - 14 and the guides 11g - 11h of the body 15 are formed to a part of the housing of the magazine 11. Thus, the body 15 is protected. Besides, the magazine 11 is made the thin housing an the operability thereof is improved. As the result, the image producing system kit itself is made thin.

72. 发明专利

JPH03174547A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH03174547A
公开(公告)日：1991-07-29
申请号：JP31335689
申请日：1989-12-04
申请人： RICOH KK
发明人： SATO MITSURU , IKESUE MASUMI , ISHIKAWA TOYOJI , KAWAISHI YASUNORI , MIURA MIKIO
IPC分类号： G03G15/00 , G03G21/00 , G03G21/16
摘要： PURPOSE:To simplify an earthing mechanism for a belt photosensitive body by constituting the base substance of the belt photosensitive body in a belt magazine of a conductive belt made of conductive substance such as nickel. CONSTITUTION:A driving roller 12 having a large diameter, a follower roller 13 having a small diameter, and a guiding member 14 which is made of the earthed conductive member and has curved shape lest it should become resistance when the belt photosensitive body 15 travels are oppositely provided in the belt magazine 11. The belt photosensitive body (a belt-like organic photosensitive body) 15 is laid among the driving roller 12, the follower roller 13 and the guiding member 14. For example, the substance obtained by dispersing the conductive substance such as metallic powder or metallic fiber in resin is good as the material of the member 14. Then, the base substance of the photosensitive body 15 is constituted of the conductive belt made of nickel. Therefore, the charge of the exposed part on the surface of the photosensitive body escapes to an earth by the guiding member 14 which comes in contact with the base substance (back surface) of the photosensitive body 15. Thus, the earthing of the photosensitive body 15 is efficiently performed with simple constitution.

73. 发明专利

JPH02125354A MEMORY ACCESS DEVICE 失效
公开(公告)号：JPH02125354A
公开(公告)日：1990-05-14
申请号：JP27898688
申请日：1988-11-04
申请人： RICOH KK
发明人： MIURA MIKIO
IPC分类号： G06F13/18 , G06F3/153
摘要： PURPOSE:To prevent data read from being hindered by generating a ready signal at the time when a memory read device does not access a memory means and executing the access of a central processing unit at a prescribed timing in response to this ready signal. CONSTITUTION:Though a central processing unit 1 outputs an access request signal ASTB in the high level at an arbitrary time, a ready signal RDY1 is generated when a memory read device 2 does not access a memory means 3, and the access of the central processing unit 1 is executed at a prescribed timing in response to this signal RDY1. Consequently, the central processing unit is held in the wait state till the access after generation of the access request signal. Thus, data read of the memory read device 2 from the memory means 3 is not hindered, and read data of the memory read device 2 is not disturbed. Further, the access waiting time is shortest in the then condition because the central processing unit 1 accesses the memory means 3 at the timing when the access is possible.

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