公开(公告)号：US20240361714A1

公开(公告)日：2024-10-31

申请号：US18640337

申请日：2024-04-19

Applicant: KYOCERA Document Solutions Inc.

Inventor： Akihiro KONDO ,  Ryohei TOKUNAGA ,  Yuta KITABAYASHI ,  Rina KIKUGAWA ,  Hiroki KAWASAKI ,  Shunsaku FUJII ,  Yuto MASAOKA

IPC: G03G15/20 ,  G03G15/00

CPC classification number: G03G15/205 ,  G03G15/2064 ,  G03G15/5004 ,  G03G2215/00772

Abstract: An image forming apparatus according to an aspect of the present disclosure includes a fixing device and a controller. The fixing device includes a fixing member, a pressure member, a heating member, and a temperature sensor. The controller cuts off power supply to the heating member when the temperature detected by the temperature sensor has risen to a cutoff temperature higher than the target temperature and thereafter resumes power supply to the heating member when the detected temperature has fallen below the cutoff temperature, and performs the PID control while limiting a maximum power supplied to the heating member to an upper limit power, which is a power supplied to the heating member at the time when the detected temperature has risen to the cutoff temperature, during a period from when power supply is resumed until a predetermined specific period of time elapses.

公开(公告)号：US20240288811A1

公开(公告)日：2024-08-29

申请号：US18589060

申请日：2024-02-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Shunsaku FUJII ,  Ryohei TOKUNAGA ,  Akihiro KONDO ,  Yuta KITABAYASHI ,  Rina KIKUGAWA ,  Hiroki KAWASAKI ,  Yuto MASAOKA

IPC: G03G15/20

CPC classification number: G03G15/2064 ,  G03G15/205 ,  G03G15/2053 ,  G03G2215/2038

Abstract: An image forming apparatus includes an image forming device, a fixing device, and a controller. The fixing device includes a fixing belt, a heater, a pressure roller, a drive device, and a pressure adjustment mechanism that adjusts pressure to the nip region from the pressure roller, by switching between a normal level and a low level. When executing a print job, the controller causes the drive device to rotate the pressure roller, thereby causing the fixing belt to start to rotate, after causing the pressure adjustment mechanism to switch the pressure to the nip region to the low level, causes the pressure adjustment mechanism to switch the pressure to the nip region from the low level to the normal level, when a predetermined time has elapsed after the fixing belt started to rotate, and causes the image forming device to form an image according to the print job.

公开(公告)号：US20240288806A1

公开(公告)日：2024-08-29

申请号：US18587012

申请日：2024-02-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuto MASAOKA ,  Yuta KITABAYASHI ,  Ryohei TOKUNAGA ,  Akihiro KONDO ,  Rina KIKUGAWA ,  Hiroki KAWASAKI ,  Shunsaku FUJII

IPC: G03G15/20 ,  G03G15/00

CPC classification number: G03G15/2039 ,  G03G15/2053 ,  G03G15/2064 ,  G03G15/5004

Abstract: An image forming apparatus includes an image forming device, a fixing belt, a heater including a main heater and two sub heaters, a pressure member, a drive device, a main temperature sensor that detects a temperature of the main heater, a sub temperature sensor that detects a temperature of only one of the two sub heaters, a controller, and an abnormality decision device that decides whether a duty ratio adopted by the controller, to control the power amount to be supplied to the two sub heaters, is an appropriate value corresponding to a transport status of the recording medium in a regular transport mode. The controller executes, when the abnormality decision device decides that the duty ratio adopted to control the power amount to be supplied to the two sub heaters is not the appropriate value, a predetermined preventive operation for suppressing an excessive temperature increase of the heater.

公开(公告)号：US20220276591A1

公开(公告)日：2022-09-01

申请号：US17680755

申请日：2022-02-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Takashi EIKI ,  Akihiro KONDO ,  Ryohei TOKUNAGA ,  Yuta KITABAYASHI ,  Hiroki KAWASAKI ,  Shunsaku FUJII ,  Tei TO ,  Rina KIKUGAWA

IPC: G03G15/20 ,  G03G15/00

Abstract: A duration measuring section measures a plurality of times. A temperature measuring section measures a temperature of a heater at each of the times. A temperature information outputting section outputs heater temperature information. A temperature tendency computing section outputs temperature tendency information of the heater. A drive controller outputs linear velocity information for controlling the linear velocity of a pressure roller. A pressure roller drive section drives the pressure roller.

公开(公告)号：US20180196382A1

公开(公告)日：2018-07-12

申请号：US15841737

申请日：2017-12-14

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kenichi KASAMA ,  Akihiro KONDO ,  Kuniaki NAKANO

IPC: G03G15/20

CPC classification number: G03G15/2028 ,  G03G15/0216 ,  G03G15/161 ,  G03G15/2053 ,  G03G15/206 ,  G03G21/02

Abstract: A fixing device includes a fixing member, a pressing member, a charger, and adjusting part. The fixing member heats toner images on media. The pressing member forms nips with the fixing member and presses the media. The charger uses a corona discharge that occurs in an electric field generated around a discharging electrode so as to charge the fixing member to a same polarity of toner in the toner images. The adjusting part increases a bias applied to the discharging electrode in accordance with increase of a cumulative number calculated by accumulating a number of the media on which the toner images are fixed or increase of a cumulative printing amount calculated by multiplying a printing rate that indicates a ratio of an area of the toner images to an area of the media by the cumulative number.

公开(公告)号：US20180164721A1

公开(公告)日：2018-06-14

申请号：US15835516

申请日：2017-12-08

Applicant: KYOCERA Document Solutions Inc.

Inventor： Akihiro KONDO

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2017 ,  G03G15/2032 ,  G03G15/2064

Abstract: A fixing device includes a heating body, a heating source, a pressuring body, a driving source, a moving part and a cooling part. The driving source rotates one body of the heating and pressuring bodies. The moving part moves the pressuring body relatively to the heating body at timing after the medium passes the nip between the heating and pressuring bodies to separate the pressuring body from the heating body. The cooling part cools the pressuring body separated from the heating body. If fixing operation is carried out when a specific value obtained in the last fixing operation by dividing a passing period of the medium through the nip by a rotating period of the one body, is smaller than a reference value, the timing is made early in comparison with a case where the specific value is equal to or more than the reference value.

公开(公告)号：US20150355583A1

公开(公告)日：2015-12-10

申请号：US14720732

申请日：2015-05-22

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Akihiro KONDO

IPC: G03G15/20

CPC classification number: G03G15/2028

Abstract: A fixing device includes a heated roller member, a pressure member, a separation member, and a discharge state switching mechanism. The heated roller member is heated by heating means. The pressure member contacts with the heated roller member so as to form a fixing nip portion. The separation member is conductive and disposed with a predetermined gap to a surface of the heated roller member, so as to separate a recording medium after passing through the fixing nip portion from the heated roller member. The discharge state switching mechanism switches between a discharge permissive condition that permits discharge from the heated roller member to the separation member and a discharge restricted condition that restricts the discharge from the heated roller member to the separation member.

Abstract translation: 定影装置包括加热辊构件，压力构件，分离构件和排出状态切换机构。 加热辊构件通过加热装置加热。 压力构件与加热的辊构件接触以形成定影夹持部。 分离构件是导电的并以预定的间隙设置在加热辊构件的表面上，以便在从加热辊构件穿过定影夹持部分之后分离记录介质。 排出状态切换机构在允许从被加热的辊构件到分离构件的排出的排出许可条件和限制从被加热的辊构件到分离构件的排出的排出限制条件之间切换。