Adhesive applicator for carton sealing machines

Claim 1

IN AN APPARATUS FOR APPLYING ADHESIVE TO THE SURFACE OF A PANEL HAVING SUBSTANTIAL THICKNESS AND MOVABLE RELATIVE THERETO, A GLUE HEAD COMPRISING A TROUGHLIKE MEMBER DEFINING AN ADHESIVE RECEIVING POCKET AND HAVING A FORWARD WALL COMPRISING COVERING SURFACES DEFINING A LINE OF CONVERGENCE, ORIFICES IN SAID WALL LOCATED SUBSTANTIALLY ON SAID LINE OF CONVERGENCE, MEANS COOPERATING WITH SAID FORWARD WALL FOR CLOSING SAID ORIFICES AT TIMES, AND MEANS FOR SUPPLYING ADHESIVE UNDER PRESSUSRE TO SAID POCKET; A BACKUP MEMBER, MEANS MOUNTING SAID GLUE HEAD FOR ROCKING MOVEMENT TOWARD AND AWAY FROM SAID BACKUP MEMBER, MENS YIELDABLY URGING SAID GLUE HEAD INTO ENGAGEMENT WITH SAID BACKUP MEMBER WITH SAID FORWARD WALL AT SAID LINE OF CONVERGENCE IN CONTACT THEREWITH AND SAID ORIFICES SUBSTANTIALLY CLOSED THEREBY, MEANS FOR RELATIVELY MOVING SAID PANEL BETWEEN SAID GLUE HEAD AND SAID BACKUP MEMBER TO CAUSE A FIRST ROCKING MOVEMENT OF SAID GLUE HEAD TO FREE SAID ORIFICES BY THE CONTACT OF A CONVERGING SURFACE OF SAID TROUGHLIKE MEMBER WITH THE LEADING EDGE OF SAID PANEL, AND A RETURN ROCKING MOVEMENT OF SAID GLUE HEAD UPON PASSAGE OF A TRAILING EDGE OF SAID PANEL BEYOND SAID GLUE HEAD, WHEREBY SAID ORIFICES AND PORTIONS OF SAID GLUE HEAD ADJACENT THERETO ARE WIPED BY SAID TRAILING EDGE DURING SAID RETURN ROCKING MOVEMENT.