US Patent No. 9,445,457

HEATER AND IMAGE HEATING APPARATUS INCLUDING THE SAME


Patent No. 9,445,457
Issue Date September 13, 2016
Title Heater And Image Heating Apparatus Including The Same
Inventorship Hiroyuki Sakakibara, Yokohama (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 9,445,457

1. A heater comprising:
a substrate having dimensions in a lengthwise direction and a widthwise direction;
a first heat generating block formed on the substrate and having dimensions in a lengthwise direction and a widthwise direction;
and

a second heat generating block formed on the substrate and having dimensions in a lengthwise direction and a widthwise direction,
the second heat generating block is provided at a position different from the first heat generating block in the lengthwise
direction of the substrate and is electrically connected with the first heat generating block,

wherein the lengthwise directions of the first and second heat generating blocks are inclined in both the lengthwise direction
of the substrate and the widthwise direction of the substrate,

wherein each of the first and second heat generating blocks includes a first conductor, a second conductor, and heat generating
resistor with which connected between the first conductor and the second conductor,

wherein the first and second conductors in each of the first and second heat generating blocks are disposed along the lengthwise
direction of each of the first and second heat generating blocks,

wherein the first conductors in the first and second heat generating blocks are provided at positions nearer to one long edge
of the substrate than the second conductors in the first and second heat generating blocks,

wherein the second conductors in the first and second heat generating blocks are provided at positions nearer to the opposite
long edge of the substrate than the first conductors in the first and second heat generating blocks,

wherein a first end portion of the first conductor of the second heat generating block is connected with the second conductor
of the first heat generating block at a second end portion of the second conductor of the first heat generating block,

wherein the first end portion of the first conductor of the second heat generating block is a portion nearer to one short
edge of the substrate than a second end portion of the first conductor of the second heat generating block, and

wherein the second end portion of the second conductor of the first heat generating block is a portion nearer to the opposite
short edge of the substrate than a first end portion of the second conductor of the first heat generating block.