Patent ID: 7326163
Filing Date: 2008-02-05
Classification: B31B

Abstract:
1. A pressure pad useful in the closing the bottom of a partially erected tubular carton of a heat sealable paperboard laminate blank held on a mandrel or the like wherein the bottom is formed from a plurality of infolded panels, flaps and/or tabs defining dual gussets having their apices disposed adjacent and facing one another and defining a gusseted bottom of the carton comprising: a rigid pad of substantially rectangular flat top surface having a first transverse centerplane and being sculpted with multiple projections projected from said top surface at varying relative distances in position to engage one or more of the infolded panels flaps and/or tabs of the gusseted bottom of the carton and apply selectively enhanced sealing pressure against the infolded panels, flaps and/or tabs and force the panels, flaps and/or tabs against the mandrel in position for heat sealing of the infolded panels, flaps and/or tabs to define a closed bottom of the carton, a pinnacle projection defined substantially centrally of said top surface of the pad, said pinnacle including a central pin embedded within the top surface of the pad and having a top surface, said pin being disposed in position to engage the infolded panels, flaps and/or tabs in the adjacent apices of underlying gussets, said top surface of said pin including at least a central post element and at least one cross arm intersecting said central post element between its opposite ends.