Machine for heat sealing polymeric sheets into a spiral drum

Details Machine for heat sealing polymeric sheets into a spiral drum Machine for heat sealing polymeric sheets into a spiral drum

B - Operations, Transporting

29

C

154/8.06

B29C 65/20 (2006.01) B29C 53/32 (2006.01) B29C 53/56 (2006.01) B29C 65/00 (2006.01) B65H 75/00 (2006.01) C02F 3/08 (2006.01)

Patent

CA 1165218

Abstract of the Disclosure A heat sealing machine for producing a drum of spirally wound layers of thermoplastic polymeric sheet material heat sealed together having a rotatable horizontal shaft for receiving thermoplastic polymeric sheet material spirally wound thereon by rotation of the shaft; a heater adapted to be positioned between and adjoining a first polymeric sheet layer being spirally wound on the shaft and a prior layer wound on the shaft; and a support, for the heater, displaceable with respect to the shaft axis so that the heater can remain radially adjacent a drum surface on which another spiral layer is to be heat sealingly attached. A portion of the heater can be readily formable into cylindri- cal shell segments of varying radii when positioned between the two polymeric sheet layers.

371640

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