DEVICE FOR SEALING TWO PLIES OF FILM TOGETHER, PARTICULARLY FOR ENCLOSING A FOAMABLE COMPOSITION IN A FLEXIBLE CONTAINER

摘要

A device for sealing two plies (14a, 14b) of plastic film together generally includes an electrically conductive heating element (34) and a rotatable support cylinder (18) having an outer, circumferential surface, the cylinder being positioned in abutting relationship with the heating element (34) and capable of rotating against the heating element, which is in fixed position, along a predetermined contact arc such that less than a complete circumferen ce of the outer surface of the cylinder is in contact with the heating element.