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1. 发明专利

JP2003015433A Image forming device 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2003015433A
公开(公告)日：2003-01-17
申请号：JP2001197658
申请日：2001-06-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OHARA SHUNICHI , NAKANO MASARU , WAKAMATSU KAZUHIRO , SASAKI AKIRA , KIKUCHI KAZUO , SAITO MASAHIKO , ONOSE ATSUSHI , MATSUMOTO SHOGO , SHIMADA AKIRA , YAMAMOTO MASASHI
IPC分类号： G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming device capable of outputting a high quality image by a simple structure. SOLUTION: The image forming device 1 has a photoreceptor belt 3 which is carried in order to form a toner image on the surface thereof, a driving means 4 which drives the photoreceptor belt, a developing means 15 for forming a toner image on the photoreceptor belt, and an intermediate transfer belt 2 which is disposed in contact with the photoreceptor belt, is driven by the photoreceptor belt, and on which the toner image on the photoreceptor belt is transferred. Carried paper is pressed against the surface of the intermediate transfer belt and thus the toner image on the intermediate transfer belt is transferred.
摘要翻译：要解决的问题：提供能够通过简单的结构输出高质量图像的图像形成装置。解决方案：图像形成装置1具有为了在其表面上形成调色剂图像而携带的感光带3，驱动感光带的驱动装置4，用于在感光带上形成调色剂图像的显影装置15 和与感光带接触设置的中间转印带2由感光带驱动，感光带上的调色剂图像被转印到感光带上。携带的纸压在中间转印带的表面上，因此中间转印带上的调色剂图像被转印。

2. 发明专利

JP2004310131A Image forming apparatus 有权
公开(公告)号：JP2004310131A
公开(公告)日：2004-11-04
申请号：JP2004192459
申请日：2004-06-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAMOTO MASASHI , MIYASAKA TORU , NAKANO MASARU , SHIMADA AKIRA , MORI KENJI , SASAKI AKIRA , WAKAMATSU KAZUHIRO
IPC分类号： G03G15/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus which is small-sized, performs high speed printing, records high quality images without a misalignment of respective color images and is superior in maintainability. SOLUTION: In the image forming apparatus, a plurality of photoreceptors are installed vertically on one surface of an intermediate transfer belt which is stretched long vertically. On the opposite surface, a fixing device is installed and each photoreceptor is made into an integral unit constitution. COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2962088B2 Color printer 失效
公开(公告)号：JP2962088B2
公开(公告)日：1999-10-12
申请号：JP4484893
申请日：1993-03-05
申请人：株式会社日立製作所
发明人： SUMYOSHI MICHIO , SASAKI AKIRA , TADOKORO HIROYUKI , KATO TAKESHI , TERAJIMA ISAMU , MATSUNO JUNICHI , NAKANO MASARU
IPC分类号： B41J2/525 , B41J2/47 , G03G15/00 , G03G15/01 , G03G15/16 , G03G21/00 , G03G21/14 , H04N1/50
CPC分类号： B41J2/525 , B41J2/473 , G03G15/0131 , H04N1/508

4. 发明专利

JP2001134042A PHOTORECEPTOR UNIT AND IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001134042A
公开(公告)日：2001-05-18
申请号：JP31194099
申请日：1999-11-02
申请人： HITACHI LTD
发明人： YAMAMOTO MASASHI , MIYASAKA TORU , NAKANO MASARU , SHIMADA AKIRA , MORI KENJI , SASAKI AKIRA , WAKAMATSU KAZUHIRO
IPC分类号： G03G15/01 , G03G21/16 , G03G21/18
摘要： PROBLEM TO BE SOLVED: To provide an image forming device that is small-sized, where high speed printing and high quality recording without any deviation in an image can be carried out and is also superior in its ability for maintenance. SOLUTION: In the device, a multiple number of photoreceptors are vertically installed on one surface of an intermediate transfer belt that is stretched vertically, a fixing device is installed on the opposite surface and respective photoreceptors are constituted in an integrated unit.

5. 发明专利

JP2001106427A ELECTROPHOTOGRAPH RECORDING DEVICE 失效
公开(公告)号：JP2001106427A
公开(公告)日：2001-04-17
申请号：JP28454199
申请日：1999-10-05
申请人： HITACHI LTD
发明人： KAMIO KEIJI , KUMADA KATSUMI , HIRAOKA TSUTOMU , NARITA SATOSHI , ONOSE KATSUYOSHI , OGISO TOSHIO , NAKANO MASARU , FUKUDA HIROMITSU
IPC分类号： B65H43/06
摘要： PROBLEM TO BE SOLVED: To easily perform recovery by detecting paper jamming in early stages in a fixing device. SOLUTION: A paper passing sensor 22 is provided near the fixing device 11. A discharged paper tray upper limit sensor 23 is provided just behind a paper discharging roller 20 at a terminal end of a discharged paper conveying passage 15 so as to detect an upper limit of a stored amount of recording paper passed through the paper discharging roller and recording paper stored in a discharged paper tray. A detecting signal from these sensors is logically determined to determine whether paper jamming exists.

6. 发明专利

JP2000338740A COLOR PRINTER 失效
公开(公告)号：JP2000338740A
公开(公告)日：2000-12-08
申请号：JP14840299
申请日：1999-05-27
申请人： HITACHI LTD
发明人： SATO KOICHI , SASAKI AKIRA , KIKUCHI KAZUO , SAITO MASAHIKO , TAKEKOSHI TETSUJI , FUKAZAWA NOBUAKI , OHARA SHUNICHI , NAKANO MASARU
IPC分类号： G03G15/00 , G03G15/01
摘要： PROBLEM TO BE SOLVED: To obtain a color printer capable of considering ambient temperature in a casing of the color printer and minimizing occurrence of color overlapping faults affected by temperature. SOLUTION: A color printer provided with a pair of conveyer roller to drive a photoreceptor belt formed endless and a motor 24 transfers a toner image formed on the photoreceptor belt to an intermediate transfer means, superimposes the toner image having a plurality of colors on the intermediate transfer means, and forms a color image by further transferring the superimposed toner image onto a transfer paper. In this case, an ambient temperature in a casing of the color printer is detected by a temperature sensor 25, the detected temperature is memorized in a RAM 22, and a CPU 20 controls a conveyer speed of the photoreceptor belt, that is a rotation speed of the motor driving the photoreceptor belt in such a way that a printing shift does not occur corresponding to the temperature difference between the previous printing time and the current printing time.

7. 发明专利

JP2000130523A BELT DRIVING DEVICE 失效
公开(公告)号：JP2000130523A
公开(公告)日：2000-05-12
申请号：JP30265298
申请日：1998-10-23
申请人： HITACHI LTD
发明人： OKANO TADASHI , TAKEKOSHI TETSUJI , KIKUCHI KAZUO , HANAJIMA TORU , NAKANO MASARU , SUZAKI MASABUMI , MIKAMI KATSUMASA , ONOSE KATSUYOSHI
IPC分类号： B65H5/02 , F16H7/00 , F16H7/02 , F16H7/08 , F16H7/12 , F16H7/18 , G03G15/00 , G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To gently compensate an offset in a belt, and also to obviate any damage to the belt due to abrasion and excessive stress when compensating each offset of two projections formed on an inner periphery in and around both the ends of the belt. SOLUTION: In this belt driving device which makes each torque in two first rings 5a installed at both the ends of two drive-roller turning shafts 2a convert into a rectilinear motion in time of an offset in a belt 1, and shifting a tension roller 5 via a transmission means whereby belt tension is slacked up, performing a belt shifting compensation, two projections 1a formed on an inner periphery at both the ends of the belt comes into contact with two second rings 5b at the outside of the first rings 5a and at a position adjacent to these first rings, whereby the second rings 5b are rotated, therefore each torque in these second rings 5b is constituted so as to be transmitted to the first rings 5a by means of frictional sliding motion between both these first and second rings 5a and 5b.

8. 发明专利

JPH11344906A PHOTORECEPTOR BELT DRIVING DEVICE 失效
公开(公告)号：JPH11344906A
公开(公告)日：1999-12-14
申请号：JP21683298
申请日：1998-07-31
申请人： HITACHI LTD
发明人： NAKANO MASARU , MORI KENJI , AKASAKI TETSURO , KIKUCHI KAZUO , TAKEKOSHI TETSUJI , SUZAKI MASABUMI , MIKAMI KATSUMASA
IPC分类号： G03G21/00 , B65H5/02 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide a photoreceptor belt driving device where time lag at bias correction time is prevented without imparting excessive stress to the belt and the positioning of the belt is simultaneously surely executed without causing the speed fluctuation of the belt at correction time. SOLUTION: A taper ring 31 and a tension roller 6 independently rotating at both ends of a driving roller 3 are connected by a link 90 where a fulcrum is provided at a center, and the tension roller 6 is moved by converting the rotational force of the taper ring 31 into linear motion when the photoreceptor belt 2 is biased, so that bias is corrected. Then, the rotational force is converted into gentle linear motion by providing the fulcrum to the link 90, so that it is moved so as not to cause the speed fluctuation to the photoreceptive belt 2.

9. 发明专利

JPH11153895A COLOR PRINTER 失效
公开(公告)号：JPH11153895A
公开(公告)日：1999-06-08
申请号：JP19698298
申请日：1998-07-13
申请人： HITACHI LTD
发明人： NAKANO MASARU , FUKAZAWA NOBUAKI , MIKAMI KATSUMASA , MOCHIZUKI AKIRA , SATO GORO , HIRAOKA TSUTOMU
IPC分类号： G03G21/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To detect whether or not a photoreceptor is detached from a printer main body without providing a detecting means for detecting the attachment/ detachment of the photoreceptor in a printer main body. SOLUTION: By using a detection means for detecting the speed of an intermediate transfer body, the intermediate transfer body rotating at the time of attaching/detaching the photoreceptor 15 is detected. In the color printer 1, a part of the intermediate transfer body is brought into contact with the photoreceptor 15, and a driving source is provided on the photoreceptor 15 so as to drive it, then the intermediate transfer body is rotated by obtaining driving force from its contact part with the photoreceptor 15. Whether or not the photoreceptor 15 is detached from the printer main body 1 is detected without providing the detection means for detecting only the attachment/detachment of the photoreceptor in the printer main body 1.

10. 发明专利

JPH09127847A COLOR LASER PRINTER 失效
公开(公告)号：JPH09127847A
公开(公告)日：1997-05-16
申请号：JP28011495
申请日：1995-10-27
申请人： HITACHI LTD
发明人： FUKAZAWA NOBUAKI , SUZAKI MASABUMI , NAKANO MASARU
IPC分类号： G03G21/14 , G03G15/01 , G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To obtain a high definition color image by counting the rotation time of an intermediate transfer body at the time of executing a printing process, from the execution of a consecutive printing process and a nonprinting stand-by state and feedback-controlling the rotational speed of the intermediate transfer body. SOLUTION: When the time (tw) of the nonprinting standyby state is a specified time or more, the rotation time tf of an intermediate transfer drum is counted before an electrostatic latent image of the first color Y for the next printing is formed. The time tf is compared with the rotation reference time TO of the intermediate transfer drum and a photoreceptive belt driving motor speed setting value FO' is corrected to correct a time shift from the rotation reference time TO. Then, the speed setting value FO" after being corrected is used as the speed setting value at the time of forming the electrostatic latent image of the first color Y for the next printing. On the other hands, when the time tw is the specified time or less, the speed setting value at the time of forming the electrostatic latent image of the first color Y for the next printing is executed at the speed setting value FO' by the previous printing command, to enable following up change in the rotational characteristic of the intermediate transfer drum caused by the change in the dimension of a rotary driving system for a photoreceptive belt and the intermediate transfer drum due to the rising of a temp. in a machine, etc.

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