Package forming apparatus and components thereof

Claim 1

PACKAGE FORMING APPARATUS FOR USE WITH POLYVINYLIDENE CHLORIDE FILM IN ITS SUPERCOOLED STATE, SAID APPARATUS COMPRISING DIE FORMING MEANS INCLUDING COOPERATING DIE PLATES AND CONVEYOR MEANS FOR MOVING SAID PLATES INTO AND OUT OF TEMPORARY PACKAGE FORMING ASSOCIATION, AT LEAST ONE OF SAID DIE PLATES HAVING A PRODUCT RECEIVING DIE CAVITY PORTION, MEANS FOR DELIVERING A FIRST FILM TO SAID ONE DIE PLATE IN COVERING RELATION WITH SAID CAVITY PORTION, FIRST DIE PLATE VACUUMIZATION MEANS OPERABLE RELATIVE TO SAID ONE DIE PLATE TO PERIPHERALLY SEAL SAID FIRST FILM TO SAID PLATE AND DRAW SAID FILM CENTRALLY INTO SAID CAVITY PORTION, MEANS MOUNTING AND OPERATING SAID FIRST DIE PLATE VACUUMIZATION MEANS RELATIVE TO SAID ONE DIE PLATE AND THE CONVEYOR MEANS THEREFOR FOR RECIPROCATION INTO AND OUT OF OPERATIVE ENGAGEMENT WITH SAID ONE DIE PLATE, FURTHER MEANS FOR DELIVERING A SECOND FILM TO THE OTHER OF SAID DIE PLATES FOR USE THEREBY IN FORMING A PRODUCT ENCLOSING PACKAGE WHEN SAID DIE PLATES ARE MOVED INTO PACKAGE FORMING ASSOCIATION, AND SECOND DIE PLATED VACUUMIZATION MEANS OPERABLE WITH EACH OF SAID DIE PLATES DURING PACKAGE FORMING ASSOCIATION THEREOF TO DRAW THE PORTIONS OF THE FILMS ENCLOSED BY SAID PLATES INTO PRODUCT ENCLOSING SEALED RELATION.