Method and apparatus for making profile sheets

Details Method and apparatus for making profile sheets Method and apparatus for making profile sheets

B - Operations, Transporting

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B29D 5/00 (2006.01) A44B 19/16 (2006.01) B29C 37/00 (2006.01) B29C 47/16 (2006.01) B29C 47/30 (2006.01) B29D 5/10 (2006.01) B31B 19/90 (2006.01) B65D 33/25 (2006.01) B29C 65/00 (2006.01)

Patent

CA 1046214

ABSTRACT A mechanism for continuously making film with one or more fastener profiles thereon to be used for making reclosable plastic bags. The film is extruded through a head which may be of T-shape and has a thin slot die opening, and at least one fastener profile is extruded through preform extruding means comprising a die block positioned so that the film and the profile will engage and fuse to each other while the plastic is still in the state of fusion. The die block is mounted adjustably to be moved into different positions along the film head with the positions varying across the film width to control the location of the profile relative to the edges of the film or relative to other profiles on the film. The width of the film is also controllable. The relative temperatures of the plastic for the film and for the profile are controllable.

189967

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