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11. 发明专利

JPH0588523A RECORDING METHOD FOR RECORDING PAPER, RECORDING METHOD FOR ELECTROPHOTOGRAPHIC DEVICE AND ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH0588523A
公开(公告)日：1993-04-09
申请号：JP25114891
申请日：1991-09-30
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： HOSHI NOBUYOSHI , TAKUMA YASUO , MIWA MASATO , DOI KOJI
IPC分类号： G03G15/36 , B41J2/44 , G03G15/00 , G03G15/04 , G03G15/043 , G03G15/047 , G03G15/14 , G03G21/00
摘要： PURPOSE:To easily and surely peel recording paper from a recording body even though a mechanical means is not provided. CONSTITUTION:When the position (a) of a photosensitive body 1 is irradiated with a laser beam for generating spacer toner 51 and development is performed by a developing device 4, power by which the recording paper 7 is attracted to the photosensitive body 1 at the time of transfer is weakened by the spacer toner 51 on the photosensitive body 1, so that the recording paper 7 is peeled from the photosensitive body 1 even when the radius of curvature of the photosensitive body 1 is large. Since the mechanical means is eliminated, the life of the photosensitive body 1 is prevented from being shortened, and further a recorded image is not disturbed since it is unnecessary to enhance the destaticizing effect of a destaticizer 9.

12. 发明专利

JPH06258957A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH06258957A
公开(公告)日：1994-09-16
申请号：JP4536993
申请日：1993-03-05
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： TAKUMA YASUO , IKAWA TATSUO , MIWA MASATO , UMEDA TAKAO , SUZUKI TAKASHI , KIKUCHI YASUO
IPC分类号： B65H5/00 , G03G15/00 , G03G15/14 , G03G15/16
摘要： PURPOSE:To provide an image forming device capable of recording a high quality image at a low cost by completely suppressing a discharge phenomenon occurring at the time of peeling a recording paper from a carrying belt. CONSTITUTION:In the image forming device provided with a rotary photosensitive drum 1, the carrying belt 9 carrying the recording paper 15 in an electrostatically attracting state and transferring a visual image on the photosensitive drum 1 onto the recording paper 15 on a transfer part and a fixing means 16 fixing an unfixed visual image transferred on the recording paper 15. the sudden transition of a charge on the recording paper 15 just before being peeled from the carrying belt 9 is prevented and a charge transition preventing means composed of a driving roller 10 grounded via a capacitance member 14 and a charge slow releasing means slowly releasing charge on the recording paper 15 just after being peeled from the carrying belt 9 and composed of a guide member 17 provided with a resistor layer 18 on a top surface are provided.

13. 发明专利

JPH0764444A BIAS CLEANING DEVICE, ELECTROSTATIC RECORDING DEVICE USING SAME, AND METHOD FOR OPERATING THEM 失效
公开(公告)号：JPH0764444A
公开(公告)日：1995-03-10
申请号：JP14217293
申请日：1993-06-14
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： UMEDA TAKAO , KAWAI KATSUYA , SAITO YOSUKE , MABUCHI HIROYUKI , ANZAI MASAYASU , MIWA MASATO , SUZUKI TAKASHI , MITSUYA TERUAKI , TAKUMA YASUO
IPC分类号： G03G15/00 , G03G15/16 , G03G21/00 , G03G21/10
摘要： PURPOSE:To provide a bias cleaning device suitable for toners remaining on a transfer belt, a transfer roller or an intermediate transfer body, and an electrostatic recording device using the same. CONSTITUTION:A bias cleaning device, which has a cleaner unit 16 provided with both a conductive brush roller 17 for collecting toner remaining on a toner image carrier 10 by making sliding contact with the toner image carrier 10 while a DC voltage of the opposite polarity to that of the toner is applied thereto, and a collecting roller 18 for collecting the toner on contact with the conductive brush roller 17 while a DC voltage having the same polarity as the voltage applied to the conductive brush roller 17 and being higher than that voltage is applied thereto, has a toner charge reduction means 13 provided upstream from the cleaner unit 16 in the direction of rotation of the toner image carrier 10, for reducing the amount of charge of the toner on the toner image carrier 10.

14. 发明专利

JPH06230682A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH06230682A
公开(公告)日：1994-08-19
申请号：JP1325693
申请日：1993-01-29
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： TAKUMA YASUO , MITSUYA TERUAKI , MASUDA KAZUTO , FUJIWARA SHIGETAKA , UMEDA TAKAO , ANZAI MASAYASU , KURIBAYASHI NATSUKI , MIWA MASATO , SUZUKI TAKASHI
IPC分类号： G03G15/16
摘要： PURPOSE:To prevent an image forming medium from scattering when separating a transfer material from a transfer carry belt and to restrain deterioration of an image from progressing, in an image forming device having the transfer carry belt. CONSTITUTION:A voltage power source having the oppositie polarity of that of the image forming medium is connected to a drive roller 11, where the transfer material 9 is separated from the transfer carry belt 10. Further, the device is provided with a corona discharger, which, when non-image surface of the transfer material 9 is destaticized immediately after the separation of the transfer material 9 from the transfer carry belt 10, applies a voltage having the same polarity as that of the drive roller to a shield member 17 situated in the vicinity of the drive roller 11. In this structure, the image forming medium is prevented from scattering when the transfer material 9 is separated, and a normal image free of deterioration can be obtained on the transfer material 9.

15. 发明专利

JPH06149077A BELT TRANSFER DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE AND THE ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06149077A
公开(公告)日：1994-05-27
申请号：JP26577292
申请日：1992-10-05
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MATSUNO JUNICHI , OBATA SHIGERU , MIWA MASATO , UNO KAZUO
IPC分类号： G03G15/16 , G03G15/00
摘要： PURPOSE:To prevent the winding of a form to a photosensitive body and to perform a transfer onto the form with high reliability by making the rotational speed of a photosensitive drum faster than the carrying speed of the form. CONSTITUTION:The form 2 is curved between a carrying roller 18 and a resist roller 13, the bias of the form 2 is straightened and the resist roller 13 is rotated in synchronization with a toner image on the photosensitive drum 3, to carry the form 2. The form 2 is guided to a dielectric belt 6 and sent to a transfer part. The speed of the dielectric belt 6 is controlled so as to be equal to or lower than that of the photosensitive drum 3 within 0.5%. At this time, the form 2 is carried at the same speed as that of the dielectric belt 6. Thus, the speed of the photosensitive drum 3 is set faster than that of the form within 0.5%, so that shearing force can act in a direction where the leading edge of the form 2 is peeled from the photosensitive drum 3, on the contact part of the photosensitive drum 3 with the form 2.

16. 发明专利

JPH05333704A 失效
公开(公告)号：JPH05333704A
公开(公告)日：1993-12-17
申请号：JP14239292
申请日：1992-06-03
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： TAKUMA YASUO , UMEDA TAKAO , IKAWA TATSUO , MIWA MASATO
IPC分类号： G03G15/14 , G03G15/16
摘要： PURPOSE:To prevent scattering of an image forming medium generated when transfer material is stripped from a transfer carrying belt and to suppress the deterioration of the image in the image forming device provided with a transfer carrying belt. CONSTITUTION:A part of a driving roll 11 where the transfer material 9 is stripped from a transfer carrying belt 10 is grounded through a grounding circuit 13 provided with electrostatic capacity load and furthermore, a contact destaticizing member 15 of the transfer material 9 is provided immediately after stripping. Thus discharge generated when the transfer material 9 is stripped is prevented and a normal image without any deterioration can be obtained on the transfer material 9.

17. 发明专利

JP2001343824A TONER REPLENISHING DEVICE AND METHOD 失效
公开(公告)号：JP2001343824A
公开(公告)日：2001-12-14
申请号：JP2000164161
申请日：2000-06-01
申请人： HITACHI KOKI KK
发明人： KUROHANE MOTOJI , MIWA MASATO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a toner replenishing device for a laser beam printer utilizing an electrophotographic system being a toner replenishing device capable of surely supplying toner with extremely simple and inexpensive constitution without possessing a lock mechanism or the like in constitution where a toner cartridge is slid and set in a toner hopper. SOLUTION: The peeling direction of film which hermetically seals the opening part of the bottom part of the toner cartridge and is stuck to be peeled is a moving direction to a specified position where the toner is supplied after the toner cartridge is placed on the toner hopper, and set to a direction where the movement of the toner cartridge is regulated by the slide cover of the toner hopper.

18. 发明专利

JP2000318908A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000318908A
公开(公告)日：2000-11-21
申请号：JP12664899
申请日：1999-05-07
申请人： HITACHI KOKI KK
发明人： HASHIMOTO YASUSHI , TERAKADO AKIRA , MIWA MASATO
IPC分类号： B65H29/70 , B65H29/58 , B65H29/60 , B65H85/00
摘要： PROBLEM TO BE SOLVED: To discharge a paper sheet free from heat curl without providing a decurler on the rear stage by providing a curl correction part having a curvature radius regulated to a specified value or less and curved downward on a paper sheet feeding passage. SOLUTION: A reversing discharge passage 13b is branched from the middle of a lead-in passage 13b, and its terminal is merged to an upstream feeding passage 12 in the paper sheet discharge port 11 of a printer 1. A return passage 13 is branched from a feed passage 12 on the paper sheet carrying directional upstream side relative to the lead-in passage 13a by a gate 10a, and the terminal is merged to the feed passage 12 on the sheet sheet carrying directional upstream side relative to an image forming device. The part P of the paper sheet feed passage 12 is curved down with a curvature radius of 30 mm or less to the carrying surface so as to surround the pinch rollers 17a of a pair of discharge rollers to form a carrying passage. The lead-in passage 13a is curved upward to the carrying surface from the paper sheet feed passage 12 by the guide of a gate 10b and branched.

19. 发明专利

JPH10293459A TONER RECOVERY DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH10293459A
公开(公告)日：1998-11-04
申请号：JP10177297
申请日：1997-04-18
申请人： HITACHI KOKI KK
发明人： SAITO YOSUKE , MIWA MASATO , KIKUCHI YASUO , TERAKADO AKIRA
IPC分类号： G03G21/10 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To prevent an obstacle caused by the flocculation of recycled toner by providing a dispersion member for dispersing and discharging carried toner into a toner supply device at the edge on the toner supply device side of a toner carrying device. SOLUTION: The toner carried by a recycling screw 21 is returned into a toner hopper 6 from the exit of a tube 22. A dispersion port 23 is provided on the tube 22 so that the toner is not concentrated at one spot as shown in the conventional device but is dispersed in the case of returning the toner into the toner hopper 6. Therefore, the recycled toner is not concentrated at one spot but dispersed in the axial direction, so that it hardly becomes a large lump. Even when the toner becomes a lump, the lump is small because the toner is dispersed. Therefore, the toner is easily broken down by the auger screw of the developing device when it is supplied to the developing device in a state where it is crushed by a toner feeding roller 7 or is not crushed at the worst.

20. 发明专利

JPH10279157A PAPER CONVEYANCE DEVICE OF PICTURE IMAGE RECORDER 失效
公开(公告)号：JPH10279157A
公开(公告)日：1998-10-20
申请号：JP9374197
申请日：1997-04-11
申请人： HITACHI KOKI KK
发明人： NUMATA HIRONORI , TERAKADO AKIRA , MIWA MASATO , SUZUKI MANABU , MATSUDA TATSUO , NISHINO YASUHIKO
IPC分类号： B41J13/00 , B65H29/58 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To convey paper having different shapes accurately by providing a mode in which the inversion operation is done based on the timing when a tip of paper passes for a detection part and a mode in which the inversion operation is done based on the timing when a rear end of paper passes for the detection part. SOLUTION: The timing when a rear end of a rectangular paper passes is detected in a detection part 6, this position information is sent to a control part 7, and the inversion operation is done by paper passing timing of a guide 4 which is calculated from a paper running speed. Moreover, as for a paper which has a tab and a different shape such as index paper, paper tip passing timing is detected by the detection part 6 and the position information is sent to the control part 7 by paper passing timing of the guide 4 which is calculated based on paper running speed and the length of paper including the tab which is input in the control part 7 in advance.

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