Method of making an elastic air spring member and said member

Details Method of making an elastic air spring member and said member Method of making an elastic air spring member and said member

B - Operations, Transporting

61

D

26/163, 105/181

B61D 45/00 (2006.01) B29C 49/00 (2006.01) B29C 69/00 (2006.01) F16F 9/04 (2006.01)

Patent

CA 1253744

Abstract of the Disclosure METHOD OF MAKING AN ELASTIC AIR SPRING MEMBER AND SAID MEMBER This invention provides a method of making an elastic air spring member and said member by forming a polyester preform (10), sometimes called a parison, blowing said preform to the shape of said member and at least shaping one end portion to give a surface (41) for sealing said member in the air spring device, said shaping usually being grinding or cutting away to give a sealing surface (41) although the neck (20) of the preform can be used to attach blown preform to the air line (14) and thus obviate the need to cut away a portion.

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