Patent ID: 6866732

Claim:
A method for continuously seaming wide panels of cured EPDM membrane to form a composite roofing membrane of predetermined width and indefinite length comprising: providing at least two supply stations, each supply station including a supply roll of cured EPDM membrane wound on a mandrel; positioning the at least two supply stations such that a mandrel of a supply station is positioned in overlapping relation to an adjacent mandrel for supplying and simultaneously positioning indefinite length cured EPDM membrane in an overlapping relationship; providing a seaming station including a frame member supporting a press assembly and a device for seaming the overlapping cured EPDM membranes, the press assembly including opposing pinch rollers; and continuously compressing the overlapping edges of the cured EPDM membranes as the EPDM membranes pass between the pinch rollers thereby continuously securing the overlapping cured EPDM membranes together to form a continuous seam and a composite roofing membrane of predetermined width and indefinite length.