Method for heat sealing thermoplastic membranes

Details Method for heat sealing thermoplastic membranes Method for heat sealing thermoplastic membranes

B - Operations, Transporting

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C

154/71.05

B29C 65/02 (2006.01) B29C 65/00 (2006.01) B29C 65/10 (2006.01) B29C 65/20 (2006.01) B29C 65/78 (2006.01) B65B 51/28 (2006.01)

Patent

CA 1280681

ABSTRACT OF THE INVENTION A method for heat sealing a portion of an upper heat sealable thermoplastic membrane to a portion of a lower heat sealable thermoplastic membrane which comprises placing a detachable stabilizer strip on the outer surface of the upper membrane over the over-lap seam portions to be sealed. The stabilizer strip must fully adhere or have mechanical contact to retain the dimen- sional stability of the upper membrane while maintaining the relative positions of the membranes. A hot air medium is directed between the upper and lower membranes thereby effecting a heat seal therebetween. Once the overlapped and sealed portions of the membranes are permitted to cool, the stabilizer strip may be removed.

542119

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