公开(公告)号：US10067449B2

公开(公告)日：2018-09-04

申请号：US15194090

申请日：2016-06-27

申请人： Ryohei Matsuda ,  Yutaka Ikebuchi ,  Yasunori Ishigaya ,  Kazuya Saito ,  Keitaro Shoji

发明人： Ryohei Matsuda ,  Yutaka Ikebuchi ,  Yasunori Ishigaya ,  Kazuya Saito ,  Keitaro Shoji

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2042 ,  G03G2215/2035

摘要： A fixing device includes a primary heater and a secondary heater that heat a fixing rotator. The primary heater includes a primary major heat generation portion and a primary minor heat generation portion. The primary minor heat generation portion includes a major heat generator that generates an increased amount of heat and a minor heat generator that generates a decreased amount of heat smaller than the increased amount of heat generated by the major heat generator. The major heat generator has a width in an axial direction of the fixing rotator that is not smaller than 30 percent and not greater than 35 percent with respect to a width of the primary minor heat generation portion in the axial direction of the fixing rotator. A temperature detector is disposed opposite the minor heat generator of the primary heater to detect a temperature of the fixing rotator.

公开(公告)号：US09804546B2

公开(公告)日：2017-10-31

申请号：US15202859

申请日：2016-07-06

申请人： Kazuya Saito ,  Yasunori Ishigaya ,  Yutaka Ikebuchi ,  Keitaro Shoji ,  Ryohei Matsuda

发明人： Kazuya Saito ,  Yasunori Ishigaya ,  Yutaka Ikebuchi ,  Keitaro Shoji ,  Ryohei Matsuda

IPC分类号： G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2042

摘要： A fixing device includes a primary heat generator and a secondary heat generator to heat an endless belt and a temperature detector, disposed opposite the secondary heat generator, to detect a temperature of the endless belt. The secondary heat generator includes an inboard edge and an outboard edge disposed outboard from the inboard edge in an axial direction of the endless belt. The secondary heat generator has an inboard length defined between a center of a detection span of the temperature detector and the inboard edge in the axial direction of the endless belt. The secondary heat generator further has an outboard length defined between the center of the detection span of the temperature detector and the outboard edge in the axial direction of the endless belt. The secondary heat generator defines a ratio of the outboard length to the inboard length that is greater than 7/3.

公开(公告)号：US10152006B2

公开(公告)日：2018-12-11

申请号：US15160374

申请日：2016-05-20

申请人： Yasunori Ishigaya ,  Yutaka Ikebuchi ,  Kazuya Saito ,  Keitaro Shoji ,  Ryohei Matsuda ,  Hiromasa Takagi ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa

发明人： Yasunori Ishigaya ,  Yutaka Ikebuchi ,  Kazuya Saito ,  Keitaro Shoji ,  Ryohei Matsuda ,  Hiromasa Takagi ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa

IPC分类号： G03G15/20

摘要： A fixing device includes a rotatable endless belt formed into a loop and a heater disposed opposite the endless belt to heat the endless belt. A nip formation pad is disposed inside the loop formed by the endless belt. The nip formation pad includes a metallic thermal equalizer extending in an axial direction of the endless belt. A rotatable pressure rotator presses against the nip formation pad via the endless belt to form a fixing nip between the endless belt and the pressure rotator, through which a recording medium bearing a toner image is conveyed. The pressure rotator includes an increased tackiness portion disposed at a lateral end of the pressure rotator in an axial direction of the pressure rotator to transmit a driving force to the endless belt. The increased tackiness portion is disposed opposite the thermal equalizer of the nip formation pad.

公开(公告)号：US09753417B2

公开(公告)日：2017-09-05

申请号：US15070735

申请日：2016-03-15

申请人： Yoshiki Yamaguchi ,  Yoshio Hattori ,  Haruyuki Honda ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa ,  Yutaka Ikebuchi ,  Yasunori Ishigaya ,  Kazuya Saito ,  Keitaro Shoji ,  Ryohei Matsuda

发明人： Yoshiki Yamaguchi ,  Yoshio Hattori ,  Haruyuki Honda ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa ,  Yutaka Ikebuchi ,  Yasunori Ishigaya ,  Kazuya Saito ,  Keitaro Shoji ,  Ryohei Matsuda

IPC分类号： G03G15/00 ,  G03G15/20

CPC分类号： G03G15/2053 ,  G03G15/2028 ,  G03G15/6573 ,  G03G2215/00421 ,  G03G2215/2035

摘要： A fixing device includes an endless fixing belt; a pressure roller to contact the fixing belt; a nip forming member to press the pressure roller from the fixing belt; a nip portion formed between the fixing belt and the pressure roller; a heater to heat the fixing belt to fuse and fix toner onto a recording sheet in the nip portion; an auxiliary driven roller; an auxiliary drive roller to drive the driven roller; an auxiliary nip portion, formed between an outer circumferential surface of the auxiliary driven roller and an outer circumferential surface of the auxiliary drive roller, to nip the recording sheet after toner fixation conveyed from the nip portion; and an outlet guide member, disposed downstream of the auxiliary nip portion, to guide the recording sheet after toner fixation conveyed from the auxiliary nip portion, with the toner-fixed recording sheet surface bent in a concave shape.

公开(公告)号：US10061235B2

公开(公告)日：2018-08-28

申请号：US15395410

申请日：2016-12-30

申请人： Keitaro Shoji ,  Yasunori Ishigaya ,  Kazuya Saito ,  Ryohei Matsuda ,  Hiromasa Takagi ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa

发明人： Keitaro Shoji ,  Yasunori Ishigaya ,  Kazuya Saito ,  Ryohei Matsuda ,  Hiromasa Takagi ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa

IPC分类号： G03G15/20

CPC分类号： G03G15/2039 ,  G03G15/2053

摘要： A fixing device includes an endless fixing belt that is multilayered, an opposing rotator disposed opposite the fixing belt and pressed to the fixing belt to form a nip, a heater disposed inside the fixing belt, and a safety device including a contactless temperature sensor disposed outside the fixing belt and apart from an outer face of the fixing. The fixing belt is to rotate and thermally expand. The contactless temperature sensor detects a temperature of the fixing belt. The safety device stops heating by the heater when the temperature detected by the contactless temperature sensor is at or higher than a predetermined temperature. As the outer face of the fixing belt shifts outward in the radial direction due to thermal, a proportion of the outer face of the fixing belt in a viewing angle of the contactless temperature sensor increases.

公开(公告)号：US11662678B2

公开(公告)日：2023-05-30

申请号：US17534456

申请日：2021-11-24

申请人： Ryohei Matsuda ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa ,  Satoshi Kuno ,  Kentaro Yamanaka

发明人： Ryohei Matsuda ,  Ryuuichi Mimbu ,  Toshihiko Shimokawa ,  Satoshi Kuno ,  Kentaro Yamanaka

IPC分类号： G03G15/20 ,  G03G15/00

CPC分类号： G03G15/2053 ,  G03G15/205 ,  G03G15/2042 ,  G03G15/2064 ,  G03G15/5045 ,  G03G2215/2038

摘要： A fixing device includes a fixing rotator over which a recording medium bearing an image is conveyed. A first heater heats the fixing rotator and generates heat evenly in a maximum conveyance span where the recording medium having a maximum width in a width direction of the recording medium is conveyed. The maximum width is available for the fixing rotator. A second heater heats the fixing rotator and generates heat in the maximum conveyance span. The second heater includes a first portion that generates heat in a first heat generation amount and a second portion that generates heat in a second heat generation amount that is greater than the first heat generation amount of the first portion.

公开(公告)号：US10895834B2

公开(公告)日：2021-01-19

申请号：US16794976

申请日：2020-02-19

申请人： Ryohei Matsuda ,  Hiroyuki Shimada

发明人： Ryohei Matsuda ,  Hiroyuki Shimada

IPC分类号： G03G15/20

摘要： A fixing device that includes a rotatable endless fixing member, a fixing heat source which heats the fixing member, a pressure member provided on the outside of the fixing member and facing the fixing member, a nip forming member provided inside the fixing member and forming a fixing nip between the fixing member and the pressure member, a nip forming support member for supporting the nip forming member, a high-thermal-conductive member provided between the fixing member and the nip forming member, an adhesive provided between the high-thermal-conductive member and the nip forming member. The thermal conductivity of the adhesive is larger than the thermal conductivity of the nip forming member and lower than the thermal conductivity of the high-thermal-conductive member.

公开(公告)号：US10281850B2

公开(公告)日：2019-05-07

申请号：US15980123

申请日：2018-05-15

申请人： Ryohei Matsuda ,  Ippei Fujimoto ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Kazunari Sawada

发明人： Ryohei Matsuda ,  Ippei Fujimoto ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Kazunari Sawada

IPC分类号： G03G15/20

摘要： A fixing device includes an endless fixing belt, a heat source, an opposed member, a nip formation pad, and a heat conductive member. The nip formation pad includes an abutment region, a first opening portion, and second opening portions. The abutment region includes a plurality of abutment surfaces abutting a first face of the heat conductive member. The first opening portion is disposed at a center of the abutment region to form a non-contact area at which the nip formation pad does not contact the heat conductive member. The abutment region includes an upstream abutment area and a downstream abutment area from the first opening portion in a direction of conveyance of a recording medium. The second opening portions divide at least one area of the upstream abutment area and the downstream abutment area into a plurality of portions in a longitudinal direction of the nip formation pad.

公开(公告)号：US11054775B2

公开(公告)日：2021-07-06

申请号：US16874089

申请日：2020-05-14

申请人： Ryohei Matsuda ,  Yoshiharu Takahashi ,  Hitoshi Fujiwara ,  Naoki Iwaya

发明人： Ryohei Matsuda ,  Yoshiharu Takahashi ,  Hitoshi Fujiwara ,  Naoki Iwaya

IPC分类号： G03G15/20

摘要： A fixing device includes a belt, an opposed rotator, a nip formation pad, a heater, a stay, and a positioner. The nip formation pad has a plurality of projections in a longitudinal direction of the nip formation pad. The positioner is disposed between the nip formation pad and the stay to position the nip formation pad. The positioner has a plurality of insertion holes arranged in a longitudinal direction of the positioner to accept the projections and restrict movement of the nip formation pad with respect to the positioner in a rotation direction of the belt and a direction opposite the rotation direction. The plurality of insertion holes includes an insertion hole disposed at a position corresponding to an end portion of the nip formation pad to accept two or more projections of the projections arranged in the longitudinal direction of the nip formation pad.

公开(公告)号：US10295939B2

公开(公告)日：2019-05-21

申请号：US15627693

申请日：2017-06-20

申请人： Hiroshi Yoshinaga ,  Kenji Ishii ,  Ippei Fujimoto ,  Takashi Seto ,  Takayuki Seki ,  Kazunari Sawada ,  Ryohei Matsuda

发明人： Hiroshi Yoshinaga ,  Kenji Ishii ,  Ippei Fujimoto ,  Takashi Seto ,  Takayuki Seki ,  Kazunari Sawada ,  Ryohei Matsuda

IPC分类号： G03G15/20

摘要： A fixing device includes an endless belt and a pressure rotator disposed opposite an outer circumferential surface of the endless belt. The pressure rotator has a first span in an axial direction of the endless belt. A nip formation pad, which is disposed opposite an inner circumferential surface of the endless belt, forms a fixing nip between the endless belt and the pressure rotator. The nip formation pad includes a belt-side face disposed opposite the endless belt. A radiant heater, which is disposed opposite the inner circumferential surface of the endless belt, heats the endless belt. A thermal conduction aid, which contacts the belt-side face of the nip formation pad, conducts heat in the axial direction of the endless belt. The thermal conduction aid has a second span within which the first span of the pressure rotator is provided at the fixing nip.