Document Type and Number:
Japanese Patent JPS5092975
Kind Code:
A
Abstract:
A method and means for bending pipe and other hollow bodies into arcuate shape while restraining collapsing tendencies of the walls by supporting the pipe internally on a close-fitting, crush-resistant flexible arbor, and expanding the arbor size by applying pressurized fluid within an annular deformable chamber or within flexible tubing wound helically about the periphery of the arbor. When bending thermo-plastic pipe which previously has been heated to above the deformation temperature in the areas to be deformed, circulating pressurized fluid also serves as a heat exchanger, hastening the cooling process.
Application Number:
JP14490274A
Publication Date:
July 24, 1975
Filing Date:
December 17, 1974
Export Citation:
International Classes:
B29C57/00; B21D9/01; B29C33/50; B29C45/00; B29C53/00; B29C53/08; B29C53/82; H02G3/00; (IPC1-7): B29C17/02