Electric heating – Heating devices – Combined with diverse-type art device
Patent
1998-05-11
1999-05-25
Walberg, Teresa
Electric heating
Heating devices
Combined with diverse-type art device
399 69, 399333, G03G 1520
Patent
active
059067624
ABSTRACT:
A fixing device for heating and fixing an unfixed image to a record member, including: a heating roller having a core roller and a layer of a resistance heating material formed on an outer or inner peripheral surface of the core roller; a pair of carriers rotatably carrying the heating roller; a pair of ring-shaped current receiver members each located between the carrier and a center of the heating roller, a pair of current supply members being in contact with the current receiver members; and insulating members made of an electrical insulation material, each being in contact with an outer end of the current receiver member and extending toward the carrier, wherein a distance L3 from the inner end of the carrier to the outer end of the current receiver member is 1 mm or more, a sum (L1+L2) of a width L1 of the insulating member and a height L2 of the insulating member from the core roller is 2.5 mm or more, and the distance L3 and the width L1 satisfy a relationship of L3.gtoreq.L1.
A heat-resistant electrical insulation layer may cover the surface of the resistance heating material layer and a temperature sensing element may be provided, a portion of the element being in contact with the heat-resistant electrical insulation layer of the heating roller and covered with a heat-resistant electrical insulation layer. Each of the heat-resistant electrical insulation layers has a breakdown voltage of 3000 V or more.
REFERENCES:
patent: 3805020 (1974-04-01), Bates
patent: 4091673 (1978-05-01), Tamura et al.
patent: 4745431 (1988-05-01), Kogure et al.
patent: 5587097 (1996-12-01), Sato et al.
Minolta Co. , Ltd.
Pelham J.
Walberg Teresa
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