公开(公告)号：US20240176268A1

公开(公告)日：2024-05-30

申请号：US18510632

申请日：2023-11-15

Applicant: Hiroshi YOSHINAGA ,  Yoshiki YAMAGUCHI ,  Takashi SETO ,  Ryohei MATSUDA ,  Ryohhei SUGIYAMA

Inventor： Hiroshi YOSHINAGA ,  Yoshiki YAMAGUCHI ,  Takashi SETO ,  Ryohei MATSUDA ,  Ryohhei SUGIYAMA

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064 ,  G03G2215/2029

Abstract: A fixing device includes a fixing member, a pressing member, a heat source, and a reflecting member. The pressing member presses and contacts an outer circumferential surface of the fixing member. The heat source is disposed inside a loop of the fixing member. The reflecting member includes a reflecting portion, a pressure receiving portion, and an extending portion. The reflecting portion reflects heat toward an inner circumferential surface of the fixing member. The pressure receiving portion receives a pressing force of the pressing member via the fixing member. The extending portion extends from an area upstream to an area downstream from the nip portion in a direction of rotation of the fixing member and facing the inner circumferential surface of the fixing member. The reflecting member is in non-contact with one or more of members disposed inside the loop of the fixing member, at least when the fixing member rotates.

公开(公告)号：US10241448B2

公开(公告)日：2019-03-26

申请号：US15627704

申请日：2017-06-20

Applicant: Kazunari Sawada ,  Ippei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

Inventor： Kazunari Sawada ,  Ippei Fujimoto ,  Kenji Ishii ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Takayuki Seki

IPC: G03G15/20

Abstract: A fixing device includes a nip former including a first face to form a fixing nip, a second face being disposed upstream from the first face in a rotation direction of a rotator and defining a predetermined angle relative to the first face, and a bent portion coupling the first face to the second face. An inner circumferential surface of the rotator slides over the first face. A lateral end accumulation portion and a center accumulation portion are defined by the second face and the bent portion of the nip former and the inner circumferential surface of the rotator. The lateral end accumulation portion is accumulated with a lubricant in a first amount. The center accumulation portion is disposed inboard from the lateral end accumulation portion in an axial direction of the rotator and accumulated with the lubricant in a second amount greater than the first amount.

公开(公告)号：US10082751B2

公开(公告)日：2018-09-25

申请号：US15804459

申请日：2017-11-06

Applicant: Takashi Seto ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ippei Fujimoto ,  Hiroyuki Shimada ,  Kazunari Sawada ,  Ryohei Matsuda

Inventor： Takashi Seto ,  Kenji Ishii ,  Hiroshi Yoshinaga ,  Takayuki Seki ,  Ippei Fujimoto ,  Hiroyuki Shimada ,  Kazunari Sawada ,  Ryohei Matsuda

IPC: G03G15/20

CPC classification number: G03G15/2025 ,  G03G15/2028 ,  G03G15/2053 ,  G03G2215/2035

Abstract: A fixing device includes a belt, a pressure rotator disposed opposite the belt, and a nip formation unit that forms a fixing nip between the belt and the pressure rotator. The nip formation unit includes a guide face disposed upstream from the fixing nip in a rotation direction of the belt and contoured to separate from the pressure rotator in a direction opposite the rotation direction of the belt. The guide face is adhered with a lubricant moved from an inner circumferential surface of the belt. The belt rotates in the rotation direction when an outer circumferential surface of the belt has a temperature lower than a fixing temperature at which the belt fixes a toner image on a recording medium. The belt rotating in the rotation direction brings the lubricant adhered to the guide face into contact with the belt.

公开(公告)号：US10042297B2

公开(公告)日：2018-08-07

申请号：US15375817

申请日：2016-12-12

Applicant: Kazunari Sawada ,  Kenji Ishii ,  Kazuhito Kishi ,  Takayuki Seki ,  Ippei Fujimoto ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Misaki Shimizu

Inventor： Kazunari Sawada ,  Kenji Ishii ,  Kazuhito Kishi ,  Takayuki Seki ,  Ippei Fujimoto ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Misaki Shimizu

IPC: G03G15/20

Abstract: A fixing device includes a flexible endless belt formed into a loop and having an inner circumferential surface, a heater to heat the endless belt, and a nip formation assembly disposed inside the loop formed by the endless belt. The nip formation assembly includes a pressure pad made of heat-resistant resin including a hollow filler, and a supplementary thermal conductor having a belt sliding-contact face over which the inner circumferential surface of the endless belt slides. The supplementary thermal conductor is interposed between the endless belt and the pressure pad to conduct heat from the heater in an axial direction of the endless belt. The fixing device further includes a pressure rotator to press against the nip formation assembly 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.

公开(公告)号：US10042295B2

公开(公告)日：2018-08-07

申请号：US15377278

申请日：2016-12-13

Applicant: Hiroshi Yoshinaga ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Misaki Shimizu ,  Kazunari Sawada

Inventor： Hiroshi Yoshinaga ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Misaki Shimizu ,  Kazunari Sawada

IPC: G03G15/20

Abstract: A fixing device includes an endless belt being applied with a lubricant on an inner circumferential surface of the endless belt. A pressure rotator presses against a nip formation pad via the endless belt to form a fixing nip between the endless belt and the pressure rotator. A radiant heater heats the endless belt. At least one contact heater heats at least one lateral end of the endless belt in an axial direction of the endless belt. At least one temperature detector detects a temperature of the endless belt. A controller controls the at least one contact heater to generate heat, controls the endless belt to rotate, and controls the radiant heater to generate heat sequentially based on the temperature of the endless belt that is detected by the at least one temperature detector.

公开(公告)号：US09964905B2

公开(公告)日：2018-05-08

申请号：US15378668

申请日：2016-12-14

Applicant: Takayuki Seki ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Ippei Fujimoto ,  Misaki Shimizu ,  Kazunari Sawada

Inventor： Takayuki Seki ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Hiroshi Yoshinaga ,  Ippei Fujimoto ,  Misaki Shimizu ,  Kazunari Sawada

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2042 ,  G03G2215/0132 ,  G03G2215/2035

Abstract: A fixing device includes a fixing rotator and at least one heater, disposed opposite an inner circumferential surface of the fixing rotator, to heat the fixing rotator. The at least one heater includes a heat generator to generate heat. A lateral end heater is disposed at least at one lateral end of a nip formation pad in a longitudinal direction of the nip formation pad. The lateral end heater heats at least one lateral end of the fixing rotator in an axial direction of the fixing rotator. The lateral end heater includes a base, a resistor, mounted on the base, to generate heat, and an electrode coupled to the resistor to supply power to the resistor. The electrode is disposed outboard from the heat generator of the at least one heater in the axial direction of the fixing rotator.

公开(公告)号：US09933730B2

公开(公告)日：2018-04-03

申请号：US15377234

申请日：2016-12-13

Applicant: Hiroshi Yoshinaga ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Kazunari Sawada

Inventor： Hiroshi Yoshinaga ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Ippei Fujimoto ,  Kazunari Sawada

IPC: G03G15/20

CPC classification number: G03G15/2007 ,  G03G15/2042 ,  G03G15/2053 ,  G03G2215/2035

Abstract: A fixing device includes an endless belt, a first radiant heater including a first heat generator to heat the endless belt, and a second radiant heater including a second heat generator, disposed outboard from the first heat generator in an axial direction of the endless belt, to heat the endless belt. A nip formation pad includes a nip-side face disposed opposite the endless belt. A contact heater heats at least one lateral end of the endless belt in the axial direction of the endless belt. The contact heater includes a nip-side face disposed opposite the endless belt. A thermal conduction aid covers the nip-side face of the nip formation pad and the nip-side face of the contact heater and conducts heat applied to the endless belt in the axial direction of the endless belt.

公开(公告)号：US20180011432A1

公开(公告)日：2018-01-11

申请号：US15627693

申请日：2017-06-20

Applicant: HIROSHI YOSHINAGA ,  KENJI ISHII ,  IPPEI FUJIMOTO ,  TAKASHI SETO ,  TAKAYUKI SEKI ,  KAZUNARI SAWADA ,  RYOHEI MATSUDA

Inventor： HIROSHI YOSHINAGA ,  KENJI ISHII ,  IPPEI FUJIMOTO ,  TAKASHI SETO ,  TAKAYUKI SEKI ,  KAZUNARI SAWADA ,  RYOHEI MATSUDA

IPC: G03G15/20

CPC classification number: G03G15/2032 ,  G03G15/2007 ,  G03G15/2042 ,  G03G15/2053 ,  G03G15/2064 ,  G03G2215/2035

Abstract: 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 thee 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.

公开(公告)号：US09678460B2

公开(公告)日：2017-06-13

申请号：US15063769

申请日：2016-03-08

Applicant: Takamasa Hase ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Hiroshi Seo ,  Ippei Fujimoto ,  Hiroshi Yoshinaga ,  Hiromasa Takagi ,  Kazunari Sawada

Inventor： Takamasa Hase ,  Susumu Matsusaka ,  Yasuhiko Ogino ,  Shohta Kobashigawa ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Hiroshi Seo ,  Ippei Fujimoto ,  Hiroshi Yoshinaga ,  Hiromasa Takagi ,  Kazunari Sawada

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2042 ,  G03G2215/0132 ,  G03G2215/2035

Abstract: A fixing device includes a primary heater, a secondary heater, and a tertiary heater to heat a primary heating span, a secondary heating span, and a tertiary heating span of a fixing rotator, respectively. A primary temperature detector and a secondary temperature detector detect a temperature of the fixing rotator. A tertiary temperature detector detects a temperature of a pressure rotator. A controller selectively performs a primary control mode to de-energize the tertiary heater and a secondary control mode to connect the secondary heater and the tertiary heater in series to energize the primary heater, the secondary heater, and the tertiary heater. The controller energizes the secondary heater and the tertiary heater in the secondary control mode based on the temperature of the fixing rotator and the pressure rotator detected by the secondary temperature detector and the tertiary temperature detector, respectively.

公开(公告)号：US09618887B2

公开(公告)日：2017-04-11

申请号：US14992643

申请日：2016-01-11

Applicant: Hiromasa Takagi ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Hiroshi Yoshinaga ,  Ippei Fujimoto ,  Kazunari Sawada

Inventor： Hiromasa Takagi ,  Kenji Ishii ,  Kazuhito Kishi ,  Takashi Seto ,  Takayuki Seki ,  Hiroshi Yoshinaga ,  Ippei Fujimoto ,  Kazunari Sawada

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2042 ,  G03G2215/2035

Abstract: A fixing device includes a flexible, tubular fixing rotator rotatable in a predetermined direction of rotation and an opposed rotator disposed opposite the fixing rotator. A nip formation pad presses against the opposed rotator via the fixing rotator to form a fixing nip between the fixing rotator and the opposed rotator, through which a recording medium bearing a toner image is conveyed. A fixing heater is disposed opposite at least a conveyance span of the fixing rotator in an axial direction thereof where the recording medium is conveyed to heat the fixing rotator. A lateral end heater is mounted on the nip formation pad and disposed opposite an inner circumferential surface of the fixing rotator at a lateral end of the fixing rotator in the axial direction thereof to heat the fixing rotator. A supplementary thermal conductor contacts the fixing rotator and the lateral end heater.