Inteplast Group Corporation

Garth Bielke

Natee Tasadoug

Sompop Teeranukool

Jacob Arriaga

Alan Mosley

Roy Kosub

Jon Wagner

A stand-up plastic food storage bag having two bottom gusset walls and a folding seam defining abutment of the front bottom gusset wall to the rear bottom gusset wall. There are gusset wall reinforced regions on an external surface of the bottom gusset walls which do not cover the folding seam, so they do not significantly interfere with folding the seam when collapsing the bag into its storage condition.

Reinforced stand-up plastic storage bag

A plastic bag comprising a welded segment at its closure which comprises sealing projections and interlocking projections to form a high integrity seal at the closure edges.

Plastic bag zipper closure with sealing projections

A stand-up plastic food storage bag having two bottom gusset walls and a folding seam defining abutment of the front bottom gusset wall to the rear bottom gusset wall. There are gusset wall reinforcement layers on an external surface of the bottom gusset walls, and these reinforcement layers terminate at least about 0.25 cm away from the folding seam, and do not cover the folding seam, so they do not significantly interfere with folding the seam when collapsing the bag into its storage condition. A method for forming such stand-up plastic food storage bags by coextruding a monolayer plastic panel film and two monolayer plastic gusset floor reinforcement layers, wherein the monolayer plastic gusset floor reinforcement layers comprise two parallel strips spaced apart by at least about 0.25 cm on the panel film, lengthwise in a direction of coextrusion, followed by folding the monolayer plastic panel film lengthwise to form a lengthwise fold line between the two monolayer plastic gusset floor reinforcement layers, forming a gusset in the area of the lengthwise fold line, forming seals in the plastic panel film in a direction perpendicular to the lengthwise fold line to define individual bag segments, and cutting the plastic panel film at the seals to form individual stand-up plastic food storage bags.

Stand-up plastic storage bag with reinforced bottom gusset

A system and method for extruding film with a thickened profile section. In some embodiments, the film forms bags with integral zipper profiles. Plastic film is extruded to form a tube. During extrusion, cooling jets direct cooling gases toward the thickened profile section below the frost line to preferentially cool the thickened profile sections. In some embodiments, warm air is drawn out of the tube interior through hot air intakes located below the frost line. In certain embodiments, the film is extruded at a higher rate of speed than conventional processes. Likewise, the extruded film tube is expanded at a lower blow up ratio than conventional processes in certain preferred embodiments. In some embodiments, the extrusion system includes an air flow surface oriented relative to the film tube to define an air flow gap of substantially uniform thickness.

Growing community of inventors

New Braunfels, TX, United States of America

Garth Bielke