E - Fixed Constructions – 04 – D
Patent
E - Fixed Constructions
04
D
98/49
E04D 13/14 (2006.01) B29C 65/18 (2006.01)
Patent
CA 1268657
METHODS OF FORMING POLYMER COATED FABRIC ROOF VENT PIPE ENCLOSURES IN FLEXIBLE ROOF COVERING MEMBRANES AND THE PRODUCTS FORMED THEREBY ABSTRACT OF THE DISCLOSURE A method of forming roof vent pipe enclosures in one piece, flexible, reinforced roof-covering membranes provides a cylindrical, open ended tube of a membrane material which is heat weldable and a tube base of like heat weldable material which has an opening of a diameter to snugly accommodate the base of the vent pipe. The tube is fitted over the end of a template which is of a greater diameter than the opening and the template is projected through the opening to fold the marginal edge section of material surrounding the opening generally in an axial direction while stretching it radially, and at the same time drawing the one end of the tube down further on the template to radially stretch it so that it is disposed in lapped engagement with the marginal edge section of material. Welding heat is applied to the lapped surface to secure them in watertight relationship and, after cutting an opening in said membrane at the location of the vent pipe, the tube is fitted over the vent pipe and the base is secured in watertight relation to the membrane.
512104
Greko John C.
Duro-Last Inc.
Ridout & Maybee Llp
LandOfFree
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