Back to results
US 7,582,344 B2Granted
Heat roller
AssigneeFuji Xerox Co., Ltd.
InventorsMitsuhiro Mori, Koichi Sanpei, Masatoshi Kimura, Masao Konishi
Life of this patent
Estimating the term…
Abstract
A heat roller having a cylindrical sheet-like heating element having a resistance member embedded in an insulating member. The sheet-like heating element is arranged between an inner tube and an outer tube. The outer tube is formed so as to be longer than the inner tube for reducing non-uniformity in heat of the heat roller. Further, a thermal expansion coefficient of a material of the outer tube is greater than that of a material of the inner tube. Moreover, a triple-tube heat roller is provided.
Claims21
A heat roller comprising:
- a sheet-like heating element having a resistance member embedded between two insulating members;
- an inner tube that comes in intimate contact with an inner surface of the sheet-like heating element, said inner tube being constructed of a metallic material;
- an outer tube that comes in intimate contact with an outer surface of the sheet-like heating element, said outer tube being constructed of a metallic material;
- and
- a fuse formed by reducing a width of a line of a pattern of the resistance member,
- a thickness of an insulating member contacting the outer tube being thinner than an insulating member contacting the inner tube.
3 more elements
A heat roller comprising:
- a sheet-like heating element having a resistance member embedded between two insulating members;
- an inner tube that comes in intimate contact with an inner surface of the sheet-like heating element;
- an outer tube that comes in intimate contact with an outer surface of the sheet-like heating element;
- and
- a fuse formed by reducing a width of a line of a pattern of the resistance member,
- the outer tube being made of Al—Mg—Si having a strength greater than that of the inner tube made of Al.
3 more elements
A heat roller comprising:
- a sheet-like heating element having a resistance member embedded between two insulating members;
- an inner tube that comes in intimate contact with an inner surface of the sheet-like heating element;
- an outer tube that comes in intimate contact with an outer surface of the sheet-like heating element;
- and
- a fuse formed by reducing a width of a line of a pattern of the resistance member,
- a thermal capacity of the outer tube being greater than a thermal capacity of the inner tube.
3 more elements
Dependencies are inferred from the claim text.