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

DE69822908D1 未知
公开(公告)号：DE69822908D1
公开(公告)日：2004-05-13
申请号：DE69822908
申请日：1998-01-30
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , YOSHIOKA KENJIRO , TANAKA HIROSHI , KOGA YOSHIRO , FUJISAWA KAZUTOSHI , SHIRAKI TAKAYUKI , OKUMURA NAOYUKI
IPC分类号： G03G15/20
摘要： Summarized, the invention discloses a fixing apparatus comprising: a heat roller (124) having a heat source therein; a first pressing roller (126) pressed against the heat roller to form a first nipping portion while being rotated at a first speed; and a second pressing roller (138) arranged at a downstream side of the first pressing roller in a rotating direction of the heat roller, and pressed against the heat roller to form a second nipping portion while being rotated at a second speed which is faster than the first speed, wherein a curvature radius (R01) of the heat roller at the first nipping portion is made larger than a curvature radius (R1) of the first pressing roller at a portion other than the first nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion; and a curvature radius (R02) of the heat roller at the second nipping portion is made larger than a curvature radius (R2) of the second pressing roller at a portion other than the second nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion.

2. 发明专利

DE69837128T2 未知
公开(公告)号：DE69837128T2
公开(公告)日：2007-12-13
申请号：DE69837128
申请日：1998-07-13
申请人： SEIKO EPSON CORP
发明人： ABE NOBUMASA , YODA KANEO , SHIRAKI TAKAYUKI , ISHIWATARI TAHEI , FUJISAWA KAZUTOSHI , OKUMURA NAOYUKI , YOSHIOKA KENJIRO , TANAKA HIROSHI
IPC分类号： G03G15/20 , G03G15/00 , G03G15/23
摘要： An image forming apparatus which is able to form either single or double sided copies on a recording medium while achieving an excellent image quality in either a matted or glossy finish. The image forming apparatus includes a fixing portion in which a first roller includes a first temperature and hardness for forming a matted image, whereas a second roller includes a higher temperature and hardness for forming a glossy image. Alternatively, or in addition, to different hardness and temperatures, the recording medium can be conveyed at a first speed to form a matted image, and a slower speed to form a glossy image. The image forming apparatus further includes an inverse and re-fixing sub-mode, which utilizes an inverting and returning passage, for reducing the curl in a recording medium, and thus also reducing the instances in which clogging takes place. The inverting and returning passage has a length sufficient to accommodate a plurality of recording mediums. Moreover, the image forming apparatus is provided with first and second discharge passages so that if one passage is clogged, the other can be used to discharge recording mediums. A switching means selects, based on detection sensors, through which discharge passage a recording medium is fed. The operations of the image forming apparatus are coordinated by a control unit.

3. 发明专利

DE69837128D1 未知
公开(公告)号：DE69837128D1
公开(公告)日：2007-04-05
申请号：DE69837128
申请日：1998-07-13
申请人： SEIKO EPSON CORP
发明人： ABE NOBUMASA , YODA KANEO , SHIRAKI TAKAYUKI , ISHIWATARI TAHEI , FUJISAWA KAZUTOSHI , OKUMURA NAOYUKI , YOSHIOKA KENJIRO , TANAKA HIROSHI
IPC分类号： G03G15/20 , G03G15/00 , G03G15/23
摘要： An image forming apparatus which is able to form either single or double sided copies on a recording medium while achieving an excellent image quality in either a matted or glossy finish. The image forming apparatus includes a fixing portion in which a first roller includes a first temperature and hardness for forming a matted image, whereas a second roller includes a higher temperature and hardness for forming a glossy image. Alternatively, or in addition, to different hardness and temperatures, the recording medium can be conveyed at a first speed to form a matted image, and a slower speed to form a glossy image. The image forming apparatus further includes an inverse and re-fixing sub-mode, which utilizes an inverting and returning passage, for reducing the curl in a recording medium, and thus also reducing the instances in which clogging takes place. The inverting and returning passage has a length sufficient to accommodate a plurality of recording mediums. Moreover, the image forming apparatus is provided with first and second discharge passages so that if one passage is clogged, the other can be used to discharge recording mediums. A switching means selects, based on detection sensors, through which discharge passage a recording medium is fed. The operations of the image forming apparatus are coordinated by a control unit.

4. 发明专利

DE69828449D1 未知
公开(公告)号：DE69828449D1
公开(公告)日：2005-02-03
申请号：DE69828449
申请日：1998-01-30
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , YOSHIOKA KENJIRO , TANAKA HIROSHI , KOGA YOSHIRO , FUJISAWA KAZUTOSHI , SHIRAKI TAKAYUKI , OKUMURA NAOYUKI
IPC分类号： G03G15/20
摘要： Summarized, the invention discloses a fixing apparatus comprising: a heat roller (124) having a heat source therein; a first pressing roller (126) pressed against the heat roller to form a first nipping portion while being rotated at a first speed; and a second pressing roller (138) arranged at a downstream side of the first pressing roller in a rotating direction of the heat roller, and pressed against the heat roller to form a second nipping portion while being rotated at a second speed which is faster than the first speed, wherein a curvature radius (R01) of the heat roller at the first nipping portion is made larger than a curvature radius (R1) of the first pressing roller at a portion other than the first nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion; and a curvature radius (R02) of the heat roller at the second nipping portion is made larger than a curvature radius (R2) of the second pressing roller at a portion other than the second nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion.

5. 发明专利

DE69828449T2 未知
公开(公告)号：DE69828449T2
公开(公告)日：2006-01-12
申请号：DE69828449
申请日：1998-01-30
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , YOSHIOKA KENJIRO , TANAKA HIROSHI , KOGA YOSHIRO , FUJISAWA KAZUTOSHI , SHIRAKI TAKAYUKI , OKUMURA NAOYUKI
IPC分类号： G03G15/20
摘要： Summarized, the invention discloses a fixing apparatus comprising: a heat roller (124) having a heat source therein; a first pressing roller (126) pressed against the heat roller to form a first nipping portion while being rotated at a first speed; and a second pressing roller (138) arranged at a downstream side of the first pressing roller in a rotating direction of the heat roller, and pressed against the heat roller to form a second nipping portion while being rotated at a second speed which is faster than the first speed, wherein a curvature radius (R01) of the heat roller at the first nipping portion is made larger than a curvature radius (R1) of the first pressing roller at a portion other than the first nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion; and a curvature radius (R02) of the heat roller at the second nipping portion is made larger than a curvature radius (R2) of the second pressing roller at a portion other than the second nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion.

6. 发明专利

DE69822908T2 未知
公开(公告)号：DE69822908T2
公开(公告)日：2005-04-28
申请号：DE69822908
申请日：1998-01-30
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , YOSHIOKA KENJIRO , TANAKA HIROSHI , KOGA YOSHIRO , FUJISAWA KAZUTOSHI , SHIRAKI TAKAYUKI , OKUMURA NAOYUKI
IPC分类号： G03G15/20
摘要： Summarized, the invention discloses a fixing apparatus comprising: a heat roller (124) having a heat source therein; a first pressing roller (126) pressed against the heat roller to form a first nipping portion while being rotated at a first speed; and a second pressing roller (138) arranged at a downstream side of the first pressing roller in a rotating direction of the heat roller, and pressed against the heat roller to form a second nipping portion while being rotated at a second speed which is faster than the first speed, wherein a curvature radius (R01) of the heat roller at the first nipping portion is made larger than a curvature radius (R1) of the first pressing roller at a portion other than the first nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion; and a curvature radius (R02) of the heat roller at the second nipping portion is made larger than a curvature radius (R2) of the second pressing roller at a portion other than the second nipping portion and a curvature radius (R0) of the heat roller at a portion other than the first nipping portion and the second nipping portion.

7. 发明专利

JP2002221852A DEVELOPING DEVICE 失效
公开(公告)号：JP2002221852A
公开(公告)日：2002-08-09
申请号：JP2001019657
申请日：2001-01-29
申请人： SEIKO EPSON CORP
发明人： SHIRAKI TAKAYUKI , OKADA HIDEKI
IPC分类号： G03G15/01 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a small-sized developing device at a low cost, where a defective image due to deteriorated toner is suppressed and a latent image formed on an image carrier can be stably and excellently developed by toner. SOLUTION: Rib lines 46 and 47 are arranged from the inside wall surface of a developing unit main body 41 constituting a developing unit 4K toward a toner storing part 42. The developing device is constituted by attaching several developing units having the same constitution as that of the developing unit 4K to a supporting frame which is rotated around the rotary shaft. The developing device is constituted such that one of the developing units is selectively placed opposite to a photoreceptor by rotating and positioning the supporting frame, and when the frame is rotated, a centrifugal force, etc., is applied on the toner in the developing unit main body 42, then, the toner flows in the toner storing part 42, the flowing toner is partly guided by the rib lines 46 and 47 in the axial direction of the rotary shaft, then, the toner is sophisticatedly shifted in the toner storing part 42, and efficiently mixed.

8. 发明专利

JP2001100563A BELT TYPE FIXING DEVICE 失效
公开(公告)号：JP2001100563A
公开(公告)日：2001-04-13
申请号：JP27508299
申请日：1999-09-28
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , KAGAMI TAKAO , SHIRAKI TAKAYUKI
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a belt type fixing device capable of performing stable fixing operation. SOLUTION: This device has a rotating body 120 which is made to press- contact with a fixing belt 110 to be heated, and a backup roller 130 which supports the belt 110 at a press-contact part between the belt 110 and the rotating body 120 from the inside and is longer than the width of the belt 110, and recording material S where a toner image is formed is made to pass through the press-contact part between the belt 110 and the rotating body 120 so as to fix the toner image. A high grip part is provided at a part directly press- contacting with the rotating body on the backup roller and also on the rear surface of the fixing belt or the surface of the backup roller coming in contact with the rear surface of the fixing belt. The high grip part is constituted of plural high grip members G arranged in band shape and an oil absorbing member 116 arranged between the members G.

9. 发明专利

JP2001075384A BELT FIXING DEVICE 失效
公开(公告)号：JP2001075384A
公开(公告)日：2001-03-23
申请号：JP24702699
申请日：1999-09-01
申请人： SEIKO EPSON CORP
发明人： KAGAMI TAKAO , YODA KANEO , SHIRAKI TAKAYUKI
IPC分类号： G03G15/20 , F16C13/00 , F16G1/04 , F16G1/28 , F16H7/02
摘要： PROBLEM TO BE SOLVED: To perform stable fixing operation by small driving force and to hardly cause faulty fixation. SOLUTION: This device is equipped with a pressure roller 120 to be brought into press-contact with a fixing belt 110 to be heated, a backup roller 130 supporting the belt 110 from the inside at a press-contact part N between the belt 110 and the roller 120 and having an elastic layer 132, and an oil coating roller 150 coating the surface of the belt 110 with releasing oil. The roller 130 is rotated at lower circumferential speed than that of the belt 110 while sliding on the belt 110, and the belt 110 is equipped with a belt base substance 112 consisting of cloth or a meshed body whose mesh is shorter than the length of the press-contact part in a circumferential direction, and a surface layer 113 with which at least the surface side of the center part in the width direction of the base substance 112 is covered and which consists of high releasing material having permeability for the releasing oil, and the exposed parts 112b of the base substance 112 are formed at both ends of the belt 110.

10. 发明专利

JPH11174880A FIXING DEVICE 失效
公开(公告)号：JPH11174880A
公开(公告)日：1999-07-02
申请号：JP36292697
申请日：1997-12-12
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , SHIRAKI TAKAYUKI , FUJISAWA KAZUTOSHI
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device not causing fixing unevenness over a whole sheet. SOLUTION: The fixing device is provided with a heating roller 50 having a heat source inside and first/second pressure rollers 60 and 70 coming into press-contact with the heating roller. Then, the heating roller and the first/ second pressure rollers are constituted to satisfy Hr1>=1.5, Hr2

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