Apparatus for making package tapes

Claim 1

IN A MACHINE FOR MAKING A PACKAGE COMPRISING A POCKET CONTAINING A PACKAGED MATERIAL, SAID MACHINE INCLUDING A FORMING DRUM HAVING A RECESS IN THE PERIPHERY THEREOF, MEANS FOR DELIVERING TWO SUPERIMPOSED STRIPS OF TAPE MATERIAL TO THE PERIPHERY OF THE DRUM IN A POSITION OVERLYING SAID RECESS, MECHANIS, COOPERATING WITH SAID DRUM FOR DIMPLING SAID SUPERIMPOSED STRIPS INTO SAID RECESS TO DEFINE AND PRE-SHAPE AN UNEXPANDED POCKET, SAID MECHANISM COMPRISING A DIMPLING MEMBER ARRANGED TO TRAVEL IN AN ARC CONFORMING WITH THE PERIPHERY OF THE DRUM, WHEREBY TO RETAIN THE SUPERIMPOSED STRIPS INDENTED INTO SAID RECESS THROUGHOUT A PORTION OF THE ANGULAR MOTION OF THE DRUM, A MASKING ELEMENT ADAPTED TO ENGAGE WITH THE STRIPS IN THE REGION SURROUNDING SAID RECESSES, MOUNTING MEANS PROVIDING FOR YIELDING ENGAGEMENT OF BOTH THE DIMPLING MEMBER AND THE MASKING ELEMENT WITH THE STRIPS AGAINST THE PERIPHERY OF THE DRUM, AND MECHANISM PROVIDING FOR SEQUENTIAL ENGAGEMENT OF SAID MEMBER AND SAID ELEMENT, WITH THE DIMPLING MEMBER BEING ENGAGED BEFORE THE ENGAGEMENT OF THE MASKING ELEMENT.