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

1980-07-14

1982-03-16

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With bending, folding, winding, or wrapping means

156184, 156499, B32B 3100

Patent

active

043199496

ABSTRACT:
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 cylindrical shell segments of varying radii when positioned between the two polymeric sheet layers.

REFERENCES:
patent: 969715 (1910-09-01), Miller
patent: 2826238 (1958-03-01), Schmidt
patent: 3086625 (1963-04-01), Wyatt
patent: 3131107 (1964-04-01), Dole et al.
patent: 3300355 (1967-01-01), Adams
patent: 3400029 (1968-09-01), Mesrobian et al.
patent: 3567504 (1971-03-01), Hopkins et al.

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