Heat tunnel for film shrinking

Details Heat tunnel for film shrinking Heat tunnel for film shrinking

2009-12-18

2011-11-08

Gerrity, Stephen F (Department: 3721)

Package making

Methods

Conforming by stretching or shrinking of cover over contents

C034S216000, C034S225000, C034S233000, C053S557000, C219S388000, C432S121000

Reexamination Certificate

active

08051629

ABSTRACT:
A heat tunnel for applying heated air to articles enclosed in shrink-wrap film includes at least one air supply unit; a conveyor; and a heat shroud spaced from the conveyor. The air supply unit includes a source of heated air, a fan, a heated air plenum, air ducts, and a return air plenum. Multiple air supply units can be provided along the conveyor to create a heat tunnel of desired length.

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