B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 23/00 (2006.01) B29C 53/30 (2006.01) F16L 11/04 (2006.01) F16L 11/11 (2006.01) F16L 11/20 (2006.01)
Patent
CA 2145951
A process for making a length of rubber tubing with axially spaced circumferentially corrugated flexible segments from a sleeve of uncured rubber and the product resulting therefrom. An end length of a sleeve of uncured rubber is placed over an end portion of a forming mandrel and an external form is placed around the sleeve end length. Rudimentary corrugations are then formed in the end length after which the sleeve is moved axially along the forming mandrel so that a new length portion of the sleeve is placed in a forming position. Then using the external forth, rudimentary corrugations are formed in the second length portion of the sleeve. These steps are repeated until the desired number of axial length portions in the sleeve are provided with rudimentary corrugations. The resulting product is then cured to forth a length of rubber tubing with a plurality of axially spaced circumferentially corrugated flexible segments.
Kramer Vance M. Jr.
Macrae & Co.
LandOfFree
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