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US5094613: Heat fixing roller having powder metal gudgeon

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Filing Information

Inventor(s) Charles Dolcimascolo · Allen Kass ·
Assignee(s) Eastman Kodak Company ·
Attorney/Agent(s) Tallam I. Nguti ·
Primary Examiner Moses; R. L. ·
Application Number US7506316
Filing date 04/09/1990
Issue date 03/10/1992
Predicted expiration date 04/09/2010
U.S. Classifications 432/60  · 464/184  ·
International Classifications F27B 928  ·
Kind CodeA
International Classifications 464184;903 ·
26 Claims, No Drawings


Abstract

A fixing mechanism is provided including a heated roller. The heated roller includes a core made of a high thermally conductive metallic material, and a gudgeon for supporting such a core. The gudgeon is made from powder metal stainless steel material that has an interconnected porosity of 20%.

Independent Claims | See all claims (26)

  1. 1. A fixing mechanism for electrostatographic reproduction apparatus including a heated roller, the heated roller comprising:(a) a core, said core being made from a high thermally conductive metallic material; and(b) a gudgeon for supporting said core, said gudgeon being made from an austenitic stainless steel powder metal part having an interconnected porosity of 20%.
  2. 20. A process for making stainless steel powder metal gudgeons to be connected to a heated roller of an electrostatographic fixing mechanism, the process including the steps of:(a) molding austenitic stainless steel powder so as to produce a gudgeon having a green density of 5.7 gm/cc; and(b) sintering the molded gudgeon at a temperature within the range 2200.degree.-2500.degree. F. so as to achieve an interconnected porosity of about 20%.
  3. 25. A process for making and connecting a stainless steel powder metal gudgeon to a metallic core heated roller of an electrostatographic fixing mechanism, the process including the steps of:(a) molding the stainless steel powder metal into a gudgeon having a generally cylindrical head including a nose portion and a shoulder flange portion;(b) sintering the molded gudgeon at a temperature within the range 2200.degree.-2500.degree. F. so as to achieve an interconnected porosity of about 20%; and(c) friction welding the head of the gudgeon to the metalic core of the heated roller such that the nose portion of the gudgeon forced-fits into an end of such core.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US3620690 MINNESOTA MINING & MFG Bergstrom Nov 1971
US3940269 Minnesota Mining and Manufacturing Company Bergstrom Feb 1976
US4229950 Eastman Kodak Company Fessenden Oct 1980
US4536076 Xerox Corporation Bickerstaff et al. Aug 1985

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
FR2589258VAURS ROBERTApr 1987
JP1215481Aug 1989

Other Publications

Research Disclosure, 13027 (pp. 23, 24), Feb. 1975.
Abstract of Japanese Kokai No. J57-158867-A, Published 11/6/89.

Patent Family

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