Patent ID: 8720066
Filing Date: 2014-05-13
Classification: B29D,F16L,Y10T

Abstract:
1. A method of manufacturing a bellows hose that comprises a tubular hose portion having an inner diameter of at least 200 mm, a length greater than 25 m, and extending continuously between two end fittings, wherein the tubular hose portion comprises a plurality of tubular corrugated or convoluted sections secured end to end and at least one protective and/or reinforcing layer disposed around the corrugated or convoluted sections, wherein the method comprises: a. sliding a first tubular corrugated or convoluted section along a non-metallic hollow mandrel, wherein b. sliding a second corrugated or convoluted section along the mandrel such that one end of the second corrugated or convoluted section engages one end of the first corrugated or convoluted section, c. securing the ends of the corrugated or convoluted sections, d. applying at least one protective and/or reinforcing layer over the corrugated or convoluted sections, e. applying a respective one of the end fittings to each end of the hose portion, and f. removing the hose from the mandrel.