Title:
PRODUCTION OF FIXING ROLL
Document Type and Number:
Japanese Patent JP3473314
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To decrease the time for warm-up in a fixing device by disposing a cylindrical core metal in a metal cylinder body and adding external force on the outer surface of the cylinder body for plastic processing to decrease the thickness of the cylinder body.
SOLUTION: When a core bar of a fixing roll in a fixing device is produced, a cylindrical core metal 52 is disposed in a metal cylinder 51, and external force 53 is added on the outer surface of the cylinder 51 for plastic processing so as to decrease the thickness of the cylinder 51 and to make the cylinder thin. Namely, the metal cylinder 51 such as a raw tube having specified thickness is prepared, on which external force 53 is added by using a die to cause plastic deformation of the tube and to make the tube thin. Thereby, work hardening is induced in the tube by the plastic deformation, and as a result, the tensile strength of the material of the raw tube increases. Therefore, the elastic limit of the cylinder 51 increases, which prevents plastic deformation or changes in the shape in the succeeding production processes.
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Inventors:
Mitsuhiro Matsumoto
Application Number:
JP4286897A
Publication Date:
December 02, 2003
Filing Date:
February 13, 1997
Export Citation:
Assignee:
Fuji Xerox Co., Ltd
International Classes:
G03G15/20; B21D26/02; B21D26/033; (IPC1-7): G03G15/20; B21D26/02
Domestic Patent References:
| JP6487703A | ||||
| JP564325A | ||||
| JP551976A | ||||
| JP8123231A | ||||
| JP863026A | ||||
| JP3622571B1 |
Attorney, Agent or Firm:
Sadao Minamino (1 outside)