Darrel R Dietrich

US Patent:

41985605, Apr 15, 1980

Filed:

Jul 11, 1977

Appl. No.:

5/814309

Inventors:

Darrel R. Dietrich - Topeka KS

Assignee:

Cavalier Products, Inc. - St. Louis MO

International Classification:

F27D 312

US Classification:

219388

Abstract:

A walking beam shrink tunnel apparatus for sealing plastic film wrapped on an article, as the article is transported through a heat tunnel surrounding a portion of a walking beam type conveyor, a pair of heating elements located upwardly of the heat tunnel, and being adjustably set through temperature control means for regulating the radiant heat emanating from the elements, heat seals the film wrapped article; the walking beam type conveyor comprising alternately arranged stationary and walking beams, the latter being movably supported upon a base that operates to shift the walking beams in a substantially elliptical pattern for affecting movement of the film wrapped articles along the conveyor and through the arranged heat tunnel.