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81. 发明专利

JPH0834536A AUTOMATIC PAPER LOADING DEVICE 失效
公开(公告)号：JPH0834536A
公开(公告)日：1996-02-06
申请号：JP17121394
申请日：1994-07-22
申请人： HITACHI KOKI KK
发明人： YAMAZAKI AKIHIKO , YOKOGAWA HIDEHO , TAKAHASHI KUNITOMO , NAKAJIMA ISAO
IPC分类号： G03G15/00 , B41J11/00 , B65H5/22
摘要： PURPOSE:To provide a simple and inexpensive automatic paper loading device stabilizing the paper travel at the time of automatic loading and preventing the ill effect on paper conveyance at the time of printing. CONSTITUTION:This automatic paper loading device is provided with a paper conveying belt 7 and a suction chamber 16 arranged below the paper conveying belt 7 and connected to a suction source. The suction chamber 16 is lifted at the time of automatic loading, and it is lowered at the time of printing. The connection between the suction chamber 16 and suction source is maintained at the time of automatic loading by a flange section provided on the side plate 20 of the suction chamber 16, and the connection is cut off at the time of printing.

82. 发明专利

JPH07242019A ELECTROPHOTOGRAPHIC APPARATUS AND PRINTING METHOD THEREOF 失效
公开(公告)号：JPH07242019A
公开(公告)日：1995-09-19
申请号：JP3464594
申请日：1994-03-04
申请人： HITACHI KOKI KK
发明人： OTOME YUKIO , YOKOGAWA HIDEHO , TAKAHASHI KUNITOMO , HIROSE YOJI , NAKAJIMA ISAO , SAITO SUSUMU , KATAOKA KEIJI
IPC分类号： B41J2/44 , G03G15/04
摘要： PURPOSE:To easily change over resolving power without adjusting an optical part such as a roof prism or a cylindrical lens. CONSTITUTION:When printing is performed with resolving power of 600 dpi, four multi-beams are applied to a photosensitive drum 11 in matching relation to printing data. When resolving power is changed over from 600 psi to 300 dpi, the photosensitive drum is irradiated with two adjacent scanning beams using the same printing data without adjusting a roof prism or cylindrical lens.

83. 发明专利

JPH0713433A DEVELOPING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0713433A
公开(公告)日：1995-01-17
申请号：JP15558593
申请日：1993-06-25
申请人： HITACHI KOKI KK
发明人： ONOSE TSUKASA , YOKOGAWA HIDEHO , NAKAJIMA ISAO , UENO HIROSHI , SHINOHARA KATSUHIRO , OGURA YOSHIO , MEGURO YUJI
IPC分类号： G03G15/08 , G03G15/09
摘要： PURPOSE:To provide a developing device provided with an inexpensive stirring device having cross mixing structure with simple structure without causing streaky surface staining even in the case of supplying toner. CONSTITUTION:A carrying magnetic roll 2, a developing magnetic roll A4 and a developing magnetic roll B5 are attached to the inside of a developer container 1. A carrying plate 6 is attached between the rolls 2 and A4, a doctor plate 7 is attached to be opposed to the roll A4, and a cross mixing 8 (stirring device) is attached to be opposed to the roll B5. A guide plate 9 and a discharge regulation plate 16, which is opposed to the guide plate 9 by leaving a distance G, are provided at the lower part of the cross mixing 8.

84. 发明专利

JPH06348078A POWER FEEDING SYSTEM FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06348078A
公开(公告)日：1994-12-22
申请号：JP13483593
申请日：1993-06-04
申请人： HITACHI KOKI KK
发明人： HONDA TAKEHIRO , YOKOGAWA HIDEHO , NAKAJIMA ISAO
IPC分类号： G03G15/20 , G03G15/00
摘要： PURPOSE:To provide a power feeding system which can be easily changed just by replacing only a power source device without changing connection even when the power feeding system for an electrophotographic device is changed. CONSTITUTION:The power source device for a three-phase and three-wire system 1 and the power source device for a three-phase and four-wire system are connected to have the identical number of terminals in a terminal block 3. Besides, a terminal block 6 provided with interchangeability for both the power source device for a three-phase and three-wire system 1 and the power source device for a three-phase and four-wire system is provided on the input side of a relay box 4.

85. 发明专利

JPH06274056A FIXING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06274056A
公开(公告)日：1994-09-30
申请号：JP5874093
申请日：1993-03-18
申请人： HITACHI KOKI KK
发明人： WATANABE ISAO , TSUJI HOKYO , YOKOGAWA HIDEHO , TAKAHASHI KUNITOMO , SAWAHATA AKIRA , OGAWA TSUKASA , AIDA SATOSHI , NAKAJIMA ISAO , UENO HIROSHI , OGURA YOSHIO
IPC分类号： B65H5/36 , G03G15/20
摘要： PURPOSE:To save power consumption, to miniaturize the device and to remove a barrier to print quality on the side where a recording medium and a heating roller are in contact with each other by efficiently transmitting a quantity of heat to a toner image on the recording medium. CONSTITUTION:A recording medium guide member 7 is provided downstream in the carrying direction of the recording medium 1 from a pressure contact part A between the heating roller 3 with a heater 4 inside and the pressure roller 5 opposite the heating roller 3, and on the same side as the heating roller 3 with respect to the pressure-contact part A. The recording medium 1 is carried while it is wrapped round the pressure roller 3.

86. 发明专利

JPH0354586A FIXING DEVICE FOR ELECTROPHOTOGRAPHY 失效
公开(公告)号：JPH0354586A
公开(公告)日：1991-03-08
申请号：JP18991889
申请日：1989-07-21
申请人： HITACHI KOKI KK
发明人： SUZUKI TAKASHI , KIKUCHI YASUO , YOKOGAWA HIDEHO , TAKAHASHI KUNITOMO , NAKAJIMA ISAO
IPC分类号： G03G15/20
摘要： PURPOSE:To save wasteful electric power, to provide the consumption of a heater caused by overheat and to reduce power rates and maintenance cost by providing plural sheathed heaters in a longitudinal direction in a preheater corresponding to the width of a printing paper so that they may be alternate on both sides at the time of viewing from the above. CONSTITUTION:A material having excellent thermal conduction such as aluminum is used for the preheating plate 15 of a fixing device, where the sheathed heaters 16a-16d are juxtaposed in the longitudinal direction of the preheating plate 15 and arranged so that heating parts may be alternate on both sides at the time of viewing from the above. When the respective heaters are energized to heat the narrow paper 6A, for example, in such a state, a temperature below a heating part 18 lowers because the heat is absorbed by the paper and the resistance values of thermistors 17a and 17b are changed. In such case, the resistance values of the thermistors 17c and 17d are not changed. By utilizing the change of the resistance values of the thermistors and controlling the on/off of the current of the heater, the paper is heated at the same temperature whether the width of paper is wide or narrow.

87. 发明专利

JPH01319081A FIXING DEVICE FOR ELECTROPHOTOGRAPHY 失效
公开(公告)号：JPH01319081A
公开(公告)日：1989-12-25
申请号：JP15044588
申请日：1988-06-17
申请人： HITACHI KOKI KK
发明人： SUZUKI TAKASHI , KIKUCHI YASUO , OGAWA TOSHITAKA , SUGAYA TOMIO , NAKAJIMA ISAO , ONOSE TSUKASA
IPC分类号： G03G15/20
摘要： PURPOSE:To perform highly accurate printing by detecting the temperature of printing paper after fixing and controlling the temperatures of a fixing heating plate and heat-pressure roller by comparing the temperature detecting output with respective reference values. CONSTITUTION:A paper 6 to which a toner image is transferred by means of a transferring device 5 is sent to a heat-pressure roller 8 after it is preheated by a fixing heating plate 7, and fixed. When the paper 6 is sent to the plate 7 and roller 8, the output signal of a temperature detector 10 installed to a stacker 9 is inputted to comparators 11 and 12, where the output signal is compared with respective reference values of the comparators 11 and 12 and the compared outputs are inputted to temperature control circuits 13 and 14. The control circuits 13 and 14 operate in accordance with respective compared outputs and control the plate 7 and roller 8 to the optimum temperatures. Therefore, the paper is always held in the optimum state and stable high-quality printed pictures can be obtained.

88. 发明专利

JPH01300282A FIXING DEVICE IN ELECTROPHOTOGRAPHIC PRINTING DEVICE 失效
公开(公告)号：JPH01300282A
公开(公告)日：1989-12-04
申请号：JP13085788
申请日：1988-05-27
申请人： HITACHI KOKI KK
发明人： SUZUKI TAKASHI , KIKUCHI YASUO , NAKAJIMA ISAO , HONDA KENJI , TAKAYASU HIDENORI , NEMOTO SHIGEO
IPC分类号： G03G15/20
摘要： PURPOSE:To eliminate a fixing failure and to execute a stable fixation by controlling a temperature of a fixing heating plate to an optimum temperature in accordance with a kind of a form. CONSTITUTION:A minute signal which has detected a paper quality, thickness, etc., of a form by a paper quality detector 15 consisting of a space filter system provided on a moving path of the form 6 is brought to spectrum analysis, and thereafter, amplified and inputted to a temperature control circuit 16, and a control is executed so that a temperature of a fixing heating plate 7 becomes a correct temperature through said circuit. In such a way, since a temperature of the fixing heating plate can be controlled automatically to an optimum temperature in accordance with a kind of a form to be fixed, a fixing failure is eliminated, and a stable fixation can be executed.

89. 发明专利

JPS63272741A CONTROL METHOD FOR CORRECTING MEANDERING OF SHEET OF PAPER 失效
公开(公告)号：JPS63272741A
公开(公告)日：1988-11-10
申请号：JP10760087
申请日：1987-04-30
申请人： HITACHI KOKI KK
发明人： NEMOTO SHIGEO , NAMIKAWA OSAMU , TSUCHIYA KIYOMI , NAKAJIMA ISAO , KIKUCHI YASUO , SUGAYA TOMIO , OGAWA TOSHITAKA , KATAGIRI SHIGENOBU
IPC分类号： B41J13/02 , B65H23/038 , G03G15/00 , G03G15/20
摘要： PURPOSE:To prevent the meandering of a sheet of paper at the start of conveyance by setting either of the right and left in the roller shaft directing of the contact pressure between thermal and pressure rollers of elastic bodies higher at the start of conveying a sheet of paper and returning to the original condition when a proper time elapsed. CONSTITUTION:A thermal roller 201 former with an elastic body is driven by a motor 101 and is brought into contact with a pressure roller 208 of an elastic body to convey a sheet of paper. The contact pressure on both ends of the pressure roller 208 can be varied by a motor 304. At the start of the conveying a sheet of paper, the contact pressure between the thermal roller 207 and the pressure roller 208 is made higher on the driving motor 101 side. Hence, in the change in angular velocity in the torsional rigidity by the driving motor 304 of the thermal roller 27, the higher contact pressure on the driving side can make the driving side relatively the same diameter as the opposite driving side making the peripheral velocities on the driving side and the opposite driving side the same, to prevent meandering at the time of starting conveyance. After a proper time elapsed, the pressure is returned to the original condition, and the same adjustment of meandering as before is carried out.

90. 发明专利

JP2003107907A DEVELOPING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 审中-公开
公开(公告)号：JP2003107907A
公开(公告)日：2003-04-11
申请号：JP2001301396
申请日：2001-09-28
申请人： HITACHI KOKI KK
发明人： SAKUMA YUKINORI , YOKOGAWA HIDEHO , NAKAJIMA ISAO , OTOME YUKIO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device for an electrophotographic device which securely recovers developer discharged from the developing device. SOLUTION: The developing device uses two-component developer composed of an imaging carrier and toner and has in its lower part a dish-like member for recovering the developer discharged from the developing device at the time of developer replacement. In the developing device, a magnetic endless belt member is disposed near the lower portion of the dish-like member. The magnetic endless belt member is supported by at least two or more rollers and can be turned in the direction of the belt circumference by rotating the rollers.

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