Conveyor rollers and manner of their manufacture
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United States of America Patent
Stats
-
Aug 24, 1993
Grant Date -
N/A
app pub date -
Mar 17, 1992
filing date -
Apr 30, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of reducing the end portion of a pipe to a smaller diameter of exact and smooth dimensions for fitting therein a roller contact bearing comprises the steps of; inserting into the end to be reduced a mandrel of an outside diameter coextensive with that of the bearing to be inserted and of a length coextensive with the predesignated length of the reduced portion; placing the pipe together with the inserted mandrel into a split die having a first portion of a length coextensive with that of the predesignated reduced length of the pipe and of an inner diameter coextensive with the predesignated outer diameter of the pipe, and a second portion of a diameter at least coextensive with the original diameter of the pipe; and placing the die and the pipe into a press for compressing the pipe end by means of the die and the mandrel.
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