초록 ▼

The present invention relates to the integral extrusion of closure profiles and a film through a film die. The present invention provides an apparatus for integrally extruding a film and closure profiles from a single stream of molten material and, consequently, eliminating any joining problems betw

The present invention relates to the integral extrusion of closure profiles and a film through a film die. The present invention provides an apparatus for integrally extruding a film and closure profiles from a single stream of molten material and, consequently, eliminating any joining problems between the film and the closure profiles. The present invention utilizes a removable die lip with removable profile wedges that mount in the die lip and extrude the closure profiles and a film together from a single stream of molten material. In this manner, the closure profiles and the film are integrally formed, and if a new closure profile design is desired, the present invention permits the quick and economical replacement of a removable profile wedge with another.

대표청구항 ▼

An apparatus for integrally extruding from a molten material stream a film having closure profiles comprising: a die having a die cavity, a die entrance at a first end of said die and a die exit at a second end of said die, said die cavity is enclosed within said die and said molten material stream

An apparatus for integrally extruding from a molten material stream a film having closure profiles comprising: a die having a die cavity, a die entrance at a first end of said die and a die exit at a second end of said die, said die cavity is enclosed within said die and said molten material stream enters said die cavity through said die entrance and flows in said die towards said die exit; a choker bar mounted within said die and positioned across said die cavity spreads said molten material; a removable die lip mounted at said die exit and having a wedge slot, said wedge slot opens toward said molten material stream; and a removable profile wedge mounted in said wedge slot and including a first end and a second end, said removable profile wedge further including a molten material through and a profile channel, said molten material trough bordering said first end and said profile channel bordering on said second end and having the outline of a closure profile.