专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

DE4100150C2 未知
公开(公告)号：DE4100150C2
公开(公告)日：2003-02-27
申请号：DE4100150
申请日：1991-01-04
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： OHSHIMA MINORU , MORIO SHUICHI , SAITOH SUSUMU , NAMIKAWA OSAMU , OBARA KAZUTOSHI , SEINO MINORU , MOCHIZUKI TAKESHI , NAKURA MAKOTO , ARIMOTO AKIRA , KASAI MASUO
IPC分类号： G02B26/10 , B41J2/44 , G02B26/08 , G02B26/12 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/19 , G05D3/12 , G06K15/12 , B41J2/455
摘要： A beam position control apparatus in which a light beam is led into a light detector from a light generating source through a movable reflector and positioning of the light beam is performed by a servo control circuit for feeding a signal from the light detector back to the movable reflector, comprises: an oscillator for oscillating in response to an initializing signal and moving the movable reflector to move the beam onto the light detector; and a control switch for separating the oscillator and the movable reflector from each other in response to the signal from the light detector, the oscillator and the control switch being arranged in the servo control circuit.

2. 发明专利

DE3814596A1 未知
公开(公告)号：DE3814596A1
公开(公告)日：1988-11-17
申请号：DE3814596
申请日：1988-04-29
申请人： HITACHI KOKI KK
发明人： NEMOTO SHIGEO , NAMIKAWA OSAMU , TSUCHIYA KIYOMI , NAKAJIMA ISAO , KIKUCHI YASUO , SUGAYA TOMIO , OGAWA TOSHITAKA , KATAGIRI SIGENOBU
IPC分类号： B41J13/02 , B65H23/038 , G03G15/00 , G03G15/20 , G03G13/20 , G03G13/12
摘要： In a printing sheet conveying device in which a sheet bearing a toner image is passed through a heating roll and a pressure roll, and which has means for changing the right and left contact pressures of these rolls to correct the meandering movement of the sheet when conveyance of the sheet is started; in which when conveyance of the sheet is started, the contact pressure of the rolls is made higher on one of the right and left sides than on the other side, and in a predetermined period of time the contact pressures on both sides are made equal to each other.

3. 发明专利

DE3837528C2 未知
公开(公告)号：DE3837528C2
公开(公告)日：1993-12-23
申请号：DE3837528
申请日：1988-11-04
申请人： HITACHI KOKI KK
发明人： NAMIKAWA OSAMU , KIKUCHI YASUO , SEINO MINORU , UENO HIROSHI , DOI KOJI , ONOSE TSUKASA , KATAGIRI SHIGENOBU , OGAWA TOSHITAKA
IPC分类号： G03G15/02 , G03G15/00 , G03G15/045
摘要： An electrophotographic device has a photosensitive element, an electrifier that forms a uniform electrostatic potential on the photosensitive element, and a light source for irradiating the photosensitive element to obtain an electrostatic latent image that has a reduced potential. A bias potential is applied to the photosensitive element after the latent image is formed, but before it is developed, so that the reduced potential of the latent image can be maintained at a constant level. With constant potentials existing on the photosensitive element, a printed image of high quality is obtained.

4. 发明专利

CA1325241C ELECTROSTATIC RECORDING APPARATUS, METHOD OF CONTROLLING THEAPPARATUS, AND METHOD OF EVALUATING LIFE OF PHOTOCONDUCTIVE MEMBER OF ELECTROSTATIC RECORDING APPARATUS 未知
公开(公告)号：CA1325241C
公开(公告)日：1993-12-14
申请号：CA594356
申请日：1989-03-21
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： UMEDA TAKAO , MIYASAKA TORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00
摘要： A potential of a reference potential measure section is set to a desired value of a potential of a drum surface (charge receptive surface) such that a potential of the reference potential measure section and a potential of the charge receptive surface are detected by a surface potential detect device during a rotation of the drum to obtain a difference between the values of the measured potential, so that an operation of a charger is controlled to be reduced to zero, thereby changing the potential of the charge receptive surface. This enables the surface potential to be precisely controlled without necessitating a frequent calibration of the surface potential detect device. In addition, the potential of the reference potential measure section is appropriately set depending on a develop condition so as to prevent a toner, when the portion passes a developer at a position over a circumferential area of the drum, from being fixed thereonto. Moreover, a potential of the reference potential detect section and a potential of the charge receptive surface are detected by use of the surface potential detect device so as to examine a difference therebetween and a distribution thereof, which enables a change as well as an irregular variation of the potential due to deterioration of the charge receptive surface to be analyzed. based on the analysis, it is possible to detect the deterioration of the photoconductive body as the charge receptive surface so as to evaluate the life thereof. Furthermore, when an information processing system is configured by combining a computer with an electrostatic recording apparatus according to the present invention, there can be provided a picture quality control system effecting a precise control depending on a characteristic of the photoconductive body.

5. 发明专利

DE3903586A1 未知
公开(公告)号：DE3903586A1
公开(公告)日：1989-08-17
申请号：DE3903586
申请日：1989-02-07
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , SAITO SUSUMU , TSUJI YASUYUKI , NAMIKAWA OSAMU , MOCHIZUKI TAKESHI
IPC分类号： B41J2/44 , G06K15/12
摘要： Electric-photosensitive printing is accomplished with an LD providing a laser scanning beam that is modulated to affect printing, and the power output of the LED is maintained constant through negative feedback by a holding voltage provided by a capacitor having its charge determined only during a non-printing portion of the printing period wherein a plurality of sheets are printed. During the non-printing period, contact of the scanning laser beam with the electro-photosensitive material is disabled while the laser beam is maintained on so that its power may be measured and compared with a reference level to provide a feedback signal for controlling the output of the laser beam, particularly the feedback signal being provided to the holding capacitor only during the non-printing portion of the period, and the holding capacitor being isolated from the feedback signal during the printing portion of the period. As a specific embodiment, a rectangular sheet of electric-photosensitive material is replaceable wound around a drum so that its opposite ends are spaced apart to provide a seam to affect the disablement of the laser beam from contracting the electro-photosensitive material during the non-printing portion of the period, and a separate light source used to detect this seam portion to determine the non-printing portion of the period.

6. 发明专利

DE3837528A1 未知
公开(公告)号：DE3837528A1
公开(公告)日：1989-05-24
申请号：DE3837528
申请日：1988-11-04
申请人： HITACHI KOKI KK
发明人： NAMIKAWA OSAMU , KIKUCHI YASUO , SEINO MINORU , UENO HIROSHI , DOI KOJI , ONOSE TSUKASA , KATAGIRI SHIGENOBU , OGAWA TOSHITAKA
IPC分类号： G03G15/02 , G03G15/00 , G03G15/045
摘要： An electrophotographic device has a photosensitive element, an electrifier that forms a uniform electrostatic potential on the photosensitive element, and a light source for irradiating the photosensitive element to obtain an electrostatic latent image that has a reduced potential. A bias potential is applied to the photosensitive element after the latent image is formed, but before it is developed, so that the reduced potential of the latent image can be maintained at a constant level. With constant potentials existing on the photosensitive element, a printed image of high quality is obtained.

7. 发明专利

DE68928805T2 未知
公开(公告)号：DE68928805T2
公开(公告)日：1999-04-22
申请号：DE68928805
申请日：1989-03-21
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： UMEDA TAKAO , MIYASAKA TORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00
摘要： The present invention provides a diagnosis system for an electrostatic recording apparatus. The system comprises an electrostatic recording apparatus including means for generating data indicative of a state of the electrostatic recording apparatus; and an information processing apparatus separately located from the electrostatic recording apparatus and including means for receiving the data from the electrostatic recording apparatus, and means for performing diagnosis of the electrostatic recording apparatus based on the data indicative of the state of the electrostatic recording apparatus.

8. 发明专利

DE68928805D1 未知
公开(公告)号：DE68928805D1
公开(公告)日：1998-10-08
申请号：DE68928805
申请日：1989-03-21
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： UMEDA TAKAO , MIYASAKA TORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00
摘要： The present invention provides a diagnosis system for an electrostatic recording apparatus. The system comprises an electrostatic recording apparatus including means for generating data indicative of a state of the electrostatic recording apparatus; and an information processing apparatus separately located from the electrostatic recording apparatus and including means for receiving the data from the electrostatic recording apparatus, and means for performing diagnosis of the electrostatic recording apparatus based on the data indicative of the state of the electrostatic recording apparatus.

9. 发明专利

DE68918313T2 未知
公开(公告)号：DE68918313T2
公开(公告)日：1995-03-02
申请号：DE68918313
申请日：1989-03-21
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： UMEDA TAKAO , MIYASAKA TORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00
摘要： The present invention provides a diagnosis system for an electrostatic recording apparatus. The system comprises an electrostatic recording apparatus including means for generating data indicative of a state of the electrostatic recording apparatus; and an information processing apparatus separately located from the electrostatic recording apparatus and including means for receiving the data from the electrostatic recording apparatus, and means for performing diagnosis of the electrostatic recording apparatus based on the data indicative of the state of the electrostatic recording apparatus.

10. 发明专利

DE3903586C2 未知
公开(公告)号：DE3903586C2
公开(公告)日：1995-02-09
申请号：DE3903586
申请日：1989-02-07
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ARIMOTO AKIRA , SAITO SUSUMU , TSUJI YASUYUKI , NAMIKAWA OSAMU , MOCHIZUKI TAKESHI
IPC分类号： B41J2/44 , G06K15/12 , B41J2/455 , H01S3/10 , G05D25/00
摘要： Electric-photosensitive printing is accomplished with an LD providing a laser scanning beam that is modulated to affect printing, and the power output of the LED is maintained constant through negative feedback by a holding voltage provided by a capacitor having its charge determined only during a non-printing portion of the printing period wherein a plurality of sheets are printed. During the non-printing period, contact of the scanning laser beam with the electro-photosensitive material is disabled while the laser beam is maintained on so that its power may be measured and compared with a reference level to provide a feedback signal for controlling the output of the laser beam, particularly the feedback signal being provided to the holding capacitor only during the non-printing portion of the period, and the holding capacitor being isolated from the feedback signal during the printing portion of the period. As a specific embodiment, a rectangular sheet of electric-photosensitive material is replaceable wound around a drum so that its opposite ends are spaced apart to provide a seam to affect the disablement of the laser beam from contracting the electro-photosensitive material during the non-printing portion of the period, and a separate light source used to detect this seam portion to determine the non-printing portion of the period.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式