Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1985-07-10
1987-03-24
Massie, Jerome
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
52 58, 156196, 156218, 156229, 156293, 156256, 1563084, 285 42, 285 43, B32B 3102, E04D 1314
Patent
active
046523219
ABSTRACT:
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.
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Stone, "Seamless Roll-On Roofing" Popular Science, May 1978, p. 10.
Duro-Last Roofing Inc.
Massie Jerome
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