Image heating apparatus and heating film
AssigneeCanon Kabushiki Kaisha
InventorsYasumasa Ohtsuka, Yohji Tomoyuki, Hideyuki Hatakeyama
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Abstract
An image heating apparatus includes a heater; a movable film having a first surface in contact with the heater and a second surface contactable with a recording material supporting a toner image; heating a toner image on a recording material by heat from the heater; the film comprising an insulative base layer chargeable to a polarity opposite from the of the toner and an electrically conductive layer at a position closer to the insulative base layer.
Claims39
An image heating apparatus, comprising:
- a heater;
- and
- a movable film having a first surface in contact with said heater and a second surface contactable with a recording material supporting a toner image;
- the toner image on the recording material being heated by heat from said heater;
- and
- said film comprising an insulative base layer chargeable to a polarity opposite from that of the toner and having a volume resistivity of not less than 10.sup.11 .OMEGA..cm and an electrically conductive layer, with a surface resistance of not more than 10.sup.7 .OMEGA./.quadrature., at a position closer to said insulative base layer.
An image heating apparatus, comprising:
- a heater;
- and
- a movable film having a first surface in contact with said heater and a second surface contactable with a recording material supporting a toner image;
- the toner image on the recording material being heated by heat from said heater;
- and
- said film comprising an insulative base layer chargeable to a polarity opposite from that of the toner and an electrically conductive layer at a position closer to said insulative base layer, wherein said conductive layer is electrically grounded.
An image heating apparatus, comprising:
- a heater;
- a movable film having a first surface in contact with said heater and a second surface contactable with a recording material supporting a toner image;
- the toner image on the recording material being heated by heat from said heater;
- said film comprising an insulative base layer contactable with said heater and an insulative parting layer contactable with the toner image and an electrically conductive layer between said insulative base layer and said insulative parting layer.
A heating film comprising:
- an insulative base layer;
- an insulative parting layer;
- and
- an electrically conductive layer between said insulative base layer and said insulative parting layer.
An image heating apparatus, comprising:
- a heater;
- a movable film having a first surface in contact with said heater and a second surface contactable with a recording material;
- wherein an image on the recording material is heated by heat from said heater;
- said film comprising an insulative base layer in contact with said heater, a surface parting layer contactable with a recording material and comprising low resistance material, and an electrically conductive layer between said insulative base layer and surface parting layer and having a surface resistance smaller than that of said surface parting layer.
A heating film comprising:
- an insulative base layer;
- a surface parting layer containing low resistance material;
- and
- an electrically conductive layer between said insulative base layer and said surface parting layer and having a surface resistance smaller than that of said surface parting layer.
An image heating apparatus, comprising:
- a heater;
- a film having a first surface in contact with said heater and a second surface contactable with the recording material;
- wherein an image on said recording material is heated by heat from said heater;
- said film comprising an insulative base layer, an electrically conductive layer, an insulative intermediate layer and an electrically conductive parting layer contactable with the recording material, in the order named from said heater.
A heating film comprising:
- an insulative base layer;
- an electrically conductive parting layer;
- an electrically conductive layer between said insulative base layer and said electrically conductive parting layer;
- and
- an insulative intermediate layer between said electrically conductive layer and said electrically conducting parting layer.
Dependencies are inferred from the claim text.