Patent
1979-03-14
1981-02-24
Coan, James F.
93 12R, 93 13, 93 51R, 93 59ES, B31B 326, B31B 360
Patent
active
042520525
ABSTRACT:
Method and apparatus for forming a sealed pouch from a paperboard blank having a heat activatable sealing material on a surface thereof. Blanks are received in an initial position above opposed curved forming surfaces and underneath a reciprocating mandrel, with the blank being folded about the mandrel as the mandrel drives the blank in a longitudinal direction between the forming surfaces. Application of heated air activates the heat sealable material, and folding plates fold the longitudinal edges of the blank inwardly to a position where clamping bars can clamp the longitudinal edges together to complete the heat seal. The folding plates and clamping bars withdraw after the heat seal is completed, and the formed pouch is ejected from the mandrel which thereafter reciprocates to its initial position to allow another blank to be inserted above the forming surfaces.
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Hunnicutt Peter T.
Meyers George L.
Schneider Douglas
Walker William R.
American Can Company
Auber Robert P.
Bartlett Ernestine C.
Coan James F.
Engstrom Harry C.
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