Back to results
US 2023/0408957 A1Published application
Heater and image heating device mounted with heater
AssigneeCanon Kabushiki Kaisha
InventorYasuhiro Shimura
Life of this patent
Estimating the term…
Abstract
A heater of the present invention includes jointed heat generating resistors having a positive temperature characteristic of resistance and provided between a first conductive element and a second conductive element on a substrate in a longitudinal direction of the substrate, and a plurality of heating blocks provided in the longitudinal direction, each of which is a set of the first conductive element, the second conductive element, and the heat generating resistor, and power supplied to at least one of the plurality of heating blocks can be controlled independent of other heating blocks.
Claims35
A heater to be used for a heating device, the heater comprising:
- an elongated substrate;
- a plurality of heat generating resistors arranged side by side in a longitudinal direction of the elongated substrate;
- a first heating block including a heat generating resistor among the plurality of heat generating resistors;
- a second heating block including a heat generating resistor among the plurality of heat generating resistors;
- a first temperature detecting element configured to detect a temperature and arranged in an area corresponding to the first heating block;
- and
- a second temperature detecting element configured to detect a temperature and arranged in an area corresponding to the second heating block,
- wherein plural heat generating resistors are included in the first heating block and are electrically connected in parallel.
5 more elements
An image heating device comprising:
- a cylindrical film;
- a heater arranged in an inner space of the cylindrical film;
- and
- a roller configured to come into contact with an outer periphery of the cylindrical film and form a nip portion to nip and convey a conveyed recording material together with the heater via the cylindrical film,
- wherein a recording material on which an image is formed is nipped and conveyed by the nip portion and heated,
- wherein the heater includes:
- an elongated substrate,
- a plurality of heat generating resistors arranged side by side in a longitudinal direction of the elongated substrate,
- a first heating block including a heat generating resistor among the plurality of heat generating resistors,
- a second heating block including a heat generating resistor among the plurality of heat generating resistors,
- a first temperature detecting element configured to detect a temperature and arranged in an area corresponding to the first heating block, and
- a second temperature detecting element configured to detect a temperature and arranged in an area corresponding to the second heating block, and
- wherein plural heat generating resistors are included in the first heating block and are electrically connected in parallel.
10 more elements
An image forming apparatus comprising:
- an image forming unit configured to form an image on a recording material;
- and
- a fixing unit configured to fix the image formed on the recording material to the recording material,
- wherein the fixing unit includes:
- (i) a cylindrical film,
- (ii) a heater arranged in an inner space of the cylindrical film, and
- (iii) a roller configured to come into contact with an outer periphery of the cylindrical film and form a nip portion to nip and convey a conveyed recording material together with the heater via the cylindrical film,
- wherein the recording material on which the image is formed is nipped and conveyed by the nip portion and heated so that the image is fixed to the recording material,
- wherein the heater includes:
- an elongated substrate,
- a plurality of heat generating resistors arranged side by side in a longitudinal direction of the elongated substrate,
- a first heating block including a heat generating resistor among the plurality of heat generating resistors,
- a second heating block including a heat generating resistor among the plurality of heat generating resistors,
- a first temperature detecting element configured to detect a temperature and arranged in an area corresponding to the first heating block, and
- a second temperature detecting element configured to detect a temperature and arranged in an area corresponding to the second heating block, and
- wherein plural heat generating resistors are included in the first heating block and are electrically connected in parallel.
13 more elements
Dependencies are inferred from the claim text.