Canon Kabushiki Kaisha

Ryota Ogura

Yasuhiro Shimura

Yusuke Saito

Teruhiko Namiki

Yuji Fujiwara

Kazushi Nishikata

Keigo Akiya

Koji Nihonyanagi

Masato Hisano

Yusuke Nakashima

Fumiki Inui

Seiji Obata

Takafumi Suzuki

Kazuhide Kudo

Koichi Yamada

Atsushi Iwasaki

Masato Sako

Shotaro Yoshimura

Takao Kawazu

A power supply apparatus comprises: a first power supply line; a second power supply line; a connection unit connecting the first and second power supply line and capable of operating in either a first operation mode in which power transmission between the first and second power supply lines is possible or a second operation mode in which power transmission is not possible; an electric discharge unit connected to the second power supply line and capable of operating in either a third operation mode in which a voltage of the second power supply line is dropped or a fourth operation mode in which the voltage is not dropped; a voltage monitoring unit to monitor the voltage of the second power supply line; and a control unit to control operation of the connection unit and the electric discharge unit.

Power supply apparatus, image forming apparatus, and power supply control method

An image forming apparatus of the present invention includes a circuit including both a circuit within a fixing unit and a power control circuit, provided with a first circuit which supplies power to a heater from an AC power supply, a second circuit electrically insulated from the first circuit, and a third circuit electrically insulated from both the first circuit and the second circuit, all of the first to third circuits are provided on at least one surface of a circuit board, and the first to third circuits are disposed on at least one straight line on which all of the first to third circuits are present on the one surface of the circuit board in the order of the first circuit, the third circuit and the second circuit.

Image forming apparatus having a connector that electrically connects a fixing unit to a circuit board having a power control circuit

Provided is an image forming apparatus including a temperature sensing circuit to which a temperature sensing element is electrically connected, wherein a surface of a heater on a side where the temperature sensing element is provided is in contact with the inner surface of a film, a heating element is provided in a primary side circuit which is electrically connected to a commercial power supply, and the temperature sensing circuit is electrically insulated from both of the primary side circuit and a secondary side circuit which is electrically insulated from the primary side circuit.

Image forming apparatus

In a heater including a plurality of first temperature detection elements that are arranged at predetermined intervals in a longitudinal direction of a substrate and respectively output temperature signals individually, and a plurality of second temperature detection elements that are arranged at predetermined intervals in positions that differ from the positions of the first temperature detection elements in a lateral direction that is orthogonal to the longitudinal direction but correspond to the positions of at least some of the plurality of first temperature detection elements in the longitudinal direction, and that output a single temperature signal obtained by adding individual temperature signals together, the individual temperature signals included in the single temperature signal are acquired on the basis of the plurality of temperature signals output by the plurality of first temperature detection elements and the single temperature signal.

The present invention relates to an image heating apparatus that includes a heater including a plurality of independently controllable heating blocks in a longitudinal direction thereof, each including a first conductor, a second conductor, and a heating element. At least one of electrodes corresponding to the respective heating blocks is disposed in an area where the heating element is located in the longitudinal direction on a second surface of the heater that is opposite to a first surface that comes into contact with an endless belt. An electrical contact is arranged so as to face the second surface of the heater. An overheating occurring in a no-media passage portion when an image formed on a recording material having a small size is heated is suppressed or reduced.

Image heating apparatus and heater for use therein

Image forming apparatus having a first circuit for supplying power to a heater, a second circuit electrically insulated with reinforced insulation from the first circuit, and a third circuit electrically insulated from the first and second circuits

At least an electrode of a first electrode group and at least an electrode of a second electrode group are formed in a region nearer to one edge portion of a substrate than to a center of the substrate in a longer-side direction of the substrate, and the electrode that is nearest to the second electrode group in the longer-side direction among the first electrode group formed in the region nearer to the one edge portion and the second electrode group are provided with a space between the electrode and the second electrode group.

Heater and fixing apparatus

Image forming apparatus having a connector with multiple circuits having varying insulation

A heater of the invention includes a substrate; a first conductive element and a second conductive element which are provided on the substrate along a longitudinal direction of the substrate; a heat generating element which is provided between the first conductive element and the second conductive element and generates heat with power supplied via the first conductive element and the second conductive element; and an electrode to which a conductive member for suppling power is connected, in which a heat generation amount of a region corresponding to a position at which an electrode of the heat generating element is provided is set to be greater than a heat generation amount of other regions.

Image heating device and heater used for image heating device

A plurality of electric conductors provided on a substrate of a heater of an image heating device has a conductor group A including a plurality of first electric conductors and a conductor group B including a plurality of second electric conductors. The plurality of first electric conductors each have a first portion having a width W1 and a second portion having a width W2 smaller than the width W1, are provided on the substrate to be arranged side by side in a width direction. The plurality of second electric conductors each have a width W3 larger than the width W2, are provided on the substrate to be arranged side by side in a width direction so as to partially overlap the second portion.

Growing community of inventors

Numazu, Japan

Ryota Ogura