IMAGE HEATING APPARATUS AND HEATER USED FOR THE IMAGE HEATING APPARATUS
First Claim
1. An image heating apparatus for heating an image formed on a recording medium, comprising:
- an endless film,a heater which contacts with the inner face of said endless film, said heater being arranged in a direction whose longitudinal direction is parallel to a generatrix of said endless film;
a back-up member that forms a nipping portion which pinches a recording medium together with said heater through said endless film, and conveys the recording medium;
wherein said heater has a first heat-generation segment provided in an upstream side, and a second heat-generation segment which is provided in a downstream side and is electrically connected to said first heat-generation segment in series, in a transport direction of the recording medium;
wherein said first heat-generation segment and said second heat-generation segment have a plurality of heat generating parts therein in the longitudinal direction respectively, and the heat generating parts are electrically connected to each other in series;
wherein each of the plurality of said heat generating parts has a first electro-conductive pattern which is provided along the longitudinal direction on a substrate, a second electro-conductive pattern which is provided along the longitudinal direction on said substrate and has a region that overlaps with said first electro-conductive pattern in the longitudinal direction, and a heat generating resistor which electrically connects the respective overlapping regions of said first electro-conductive pattern and said second electro-conductive pattern with each other and generates heat by a supplied electric power;
wherein a position of a gap between said adjacent heat generating parts in said first heat-generation segment is different from a position of a gap between said adjacent heat generating parts in said second heat-generation segment, in the longitudinal direction.
1 Assignment
0 Petitions
Accused Products
Abstract
The image heating apparatus includes a heater has a first and heat-generation segment having a plurality of heat generating parts therein in the longitudinal direction respectively, and the heat generating parts each having a first electro-conductive pattern provided along the longitudinal direction on a substrate, and a second electro-conductive pattern provided along the longitudinal direction on said substrate and has a region that overlaps with said first electro-conductive pattern in the longitudinal direction, and a heat generating resistor which electrically connects the respective overlapping regions of said first electro-conductive pattern and said second electro-conductive pattern with each other and generates heat by a supplied electric power. It simultaneously prevents the temperature in a non-sheet feeding portion from rising and secures fixing properties in a gap between the divided heat generating resistors, and a heater used in this image heating apparatus.
-
Citations
4 Claims
-
1. An image heating apparatus for heating an image formed on a recording medium, comprising:
-
an endless film, a heater which contacts with the inner face of said endless film, said heater being arranged in a direction whose longitudinal direction is parallel to a generatrix of said endless film; a back-up member that forms a nipping portion which pinches a recording medium together with said heater through said endless film, and conveys the recording medium; wherein said heater has a first heat-generation segment provided in an upstream side, and a second heat-generation segment which is provided in a downstream side and is electrically connected to said first heat-generation segment in series, in a transport direction of the recording medium; wherein said first heat-generation segment and said second heat-generation segment have a plurality of heat generating parts therein in the longitudinal direction respectively, and the heat generating parts are electrically connected to each other in series; wherein each of the plurality of said heat generating parts has a first electro-conductive pattern which is provided along the longitudinal direction on a substrate, a second electro-conductive pattern which is provided along the longitudinal direction on said substrate and has a region that overlaps with said first electro-conductive pattern in the longitudinal direction, and a heat generating resistor which electrically connects the respective overlapping regions of said first electro-conductive pattern and said second electro-conductive pattern with each other and generates heat by a supplied electric power; wherein a position of a gap between said adjacent heat generating parts in said first heat-generation segment is different from a position of a gap between said adjacent heat generating parts in said second heat-generation segment, in the longitudinal direction. - View Dependent Claims (2)
-
-
3. A heater for an image heating apparatus, including an endless film therein and heating an image formed on a recording medium, comprising:
-
a first heat-generation segment provided on one end side of said heater in a transverse direction; a second heat-generation segment provided on the other end side of said heater in the transverse direction and is electrically connected to said first heat-generation segment in series; wherein said first heat-generation segment and said second heat-generation segment have a plurality of heat generating parts in the longitudinal direction of said heater respectively, and the heat generating parts are electrically connected to each other in series; wherein each of the plurality of said heat generating parts has a first electro-conductive pattern which is provided along the longitudinal direction on a substrate, a second electro-conductive pattern which is provided along the longitudinal direction on said substrate and has a region that overlaps with said first electro-conductive pattern in the longitudinal direction, and a heat generating resistor which electrically connects the overlapping regions of said first electro-conductive pattern and said second electro-conductive pattern with each other and generates heat by a supplied electric power; wherein the position of a gap between said adjacent heat generating parts in said first heat-generation segment is different from the position of a gap between said adjacent heat generating parts in said second heat-generation segment, in the longitudinal direction. - View Dependent Claims (4)
-
Specification