JPH0380461U

JPH0380461U -

Info

Publication number: JPH0380461U
Application number: JP14156389U
Authority: JP
Priority date: 1989-12-08
Filing date: 1989-12-08
Publication date: 1991-08-19

Description

[Brief explanation of the drawing]

第１図は本考案が適用されるベルト定着装置の
構成一例を示す断面図、第２図は本考案の実施例
のベルトの構成を示す分解斜視図、第３図は本考
案の他の実施例の支持ローラの正面図、第４図は
本考案が適用される他のベルト定着装置の一例の
断面図である。１……ヒータ、２……定着ローラ、３……エン
ドレスベルト、３ａ……表層、３ｂ……下層、３
ｃ……細幅ベルト（低い突条）、３ｄ……溝、４
……ローラ、４ａ……螺旋状突条。 FIG. 1 is a sectional view showing an example of the configuration of a belt fixing device to which the present invention is applied, FIG. 2 is an exploded perspective view showing the configuration of a belt according to an embodiment of the present invention, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a front view of the support roller of the example, and a sectional view of another example of the belt fixing device to which the present invention is applied. 1... Heater, 2... Fixing roller, 3... Endless belt, 3a... Surface layer, 3b... Lower layer, 3
c...Narrow belt (low protrusion), 3d...Groove, 4
...Roller, 4a...Spiral protrusion.

Claims

[Claims for Utility Model Registration] (1) A fixing roller with a built-in heater, and a non-stretchable material that is in pressure contact with the fixing roller at a circumferential length relative to a predetermined central angle and is conveyed at the same speed as the fixing roller. In a belt fixing device that has an endless belt made of In this case, a belt fixing device characterized in that low protrusions are formed on the inner peripheral surface of the belt symmetrically with respect to the belt center line and spaced apart obliquely to the belt conveyance direction. (2) A fixing roller having a built-in heater, and an endless belt made of a non-stretchable material that is conveyed at the same speed as the fixing roller at a circumferential length with respect to a predetermined central angle of the fixing roller, and the endless belt In a belt fixing device that performs fixing by passing a transfer paper carrying an unfixed toner image through a pressure contact portion between a fixing roller and a fixing roller, at least one roller out of a plurality of rollers that stretches the endless belt described above is used. A belt fixing device characterized in that a spiral protrusion is provided on the surface of the belt symmetrically with respect to a center plane in the width direction.