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1. 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.

2. 发明专利

DE60034719D1 未知
公开(公告)号：DE60034719D1
公开(公告)日：2007-06-21
申请号：DE60034719
申请日：2000-01-19
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , FUJISAWA KAZUTOSHI , OKUMURA NAOYUKI , ISHIWATARI TAHEI , TANAKA HIROSHI , YOSHIOKA KENJIRO
IPC分类号： G03G15/20
摘要： A fixing device comprising a first roller (140) having restricting portions, a second roller (166), an endless belt (110) suspended between said first and second rollers, a third roller (130) forming a nip in cooperation with said endless belt and said second roller, and a tension application mechanism (144) which applies tension to said endless belt, wherein a width of said tension application mechanism is shorter than a width of said endless belt, and wherein said tension application mechanism is located closer to a position at which said endless belt commences separation from said second roller than to a position at which said endless belt commences contact with said first roller.

3. 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.

4. 发明专利

AT362126T 未知
公开(公告)号：AT362126T
公开(公告)日：2007-06-15
申请号：AT00100269
申请日：2000-01-19
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , FUJISAWA KAZUTOSHI , OKUMURA NAOYUKI , ISHIWATARI TAHEI , TANAKA HIROSHI , YOSHIOKA KENJIRO
IPC分类号： G03G15/20
摘要： A fixing device comprising a first roller (140) having restricting portions, a second roller (166), an endless belt (110) suspended between said first and second rollers, a third roller (130) forming a nip in cooperation with said endless belt and said second roller, and a tension application mechanism (144) which applies tension to said endless belt, wherein a width of said tension application mechanism is shorter than a width of said endless belt, and wherein said tension application mechanism is located closer to a position at which said endless belt commences separation from said second roller than to a position at which said endless belt commences contact with said first roller.

5. 发明专利

DE3788930T2 未知
公开(公告)号：DE3788930T2
公开(公告)日：1994-08-18
申请号：DE3788930
申请日：1987-11-06
申请人： SEIKO EPSON CORP
发明人： KIMURA IPPO , OKUMURA NAOYUKI , ARUGA TOMOE , ARAI YOSHIO
IPC分类号： G11B5/54 , G11B5/58 , G11B5/48

6. 发明专利

DE60034719T2 未知
公开(公告)号：DE60034719T2
公开(公告)日：2008-01-17
申请号：DE60034719
申请日：2000-01-19
申请人： SEIKO EPSON CORP
发明人： YODA KANEO , FUJISAWA KAZUTOSHI , OKUMURA NAOYUKI , ISHIWATARI TAHEI , TANAKA HIROSHI , YOSHIOKA KENJIRO
IPC分类号： G03G15/20
摘要： A fixing device comprising a first roller (140) having restricting portions, a second roller (166), an endless belt (110) suspended between said first and second rollers, a third roller (130) forming a nip in cooperation with said endless belt and said second roller, and a tension application mechanism (144) which applies tension to said endless belt, wherein a width of said tension application mechanism is shorter than a width of said endless belt, and wherein said tension application mechanism is located closer to a position at which said endless belt commences separation from said second roller than to a position at which said endless belt commences contact with said first roller.

7. 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.

8. 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.

9. 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.

10. 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.

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