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AssigneeOwens-Illinois, Inc.
InventorsMarshall G. Brummett, Russell W. Heckman, George A. Nickey, James E. Taylor
Estimating the term…
There is disclosed a method of covering glass containers with a preformed, cylindrical sleeve of a polyethylene or like polyolefin material, or laminates of polyolefins, that are heat shrinkable circumferentially of the sleeve and made from sheet of a foam or a laminate of said plastic material such as a foam-film laminate. Upon application of heat, the sleeve initially softens or becomes limp, and grows or enlarges, such that in its telescopic assembly on the upright bottle it tends to slip from position. The method includes supporting the sleeve from underneath during heating it for shrinkage by conveying the container and sleeve over a water-cooled sleeve support bar extending into the heating device a substantial distance allowing the sleeve to shrink onto the bottle. The sleeve support bar includes a lubricious surface layer adjacent the sleeve. The lubricious layer combined with water cooling maintains support surface below 200.degree. F, preferably below 150.degree. F, and prevents sticking of the plastic on the support.
The method of making a container having an encircling plastic covering thereon comprising conveying containers in line in an upright position along a first path, moving heat shrinkable thermoplastic sleeves in line in an upright position along a second path that includes a portion in underlying axial registry with containers being conveyed along said first path, transferring the registered sleeves to overlie the respective containers while in axial registry in said first and second paths, moving the containers and sleeves thereon in said first path to and through a heating zone wherein the sleeves are sufficiently heated to completely shrink them snugly over the container exterior surface, holding the sleeves in said transferred position while moving the containers and sleeves to and through the heating zone by passing them over a sleeve supporting bar underlying said first path in engagement with the end of said sleeves until they are heated sufficiently to shrink said sleeves annularly and hold the sleeves in said position on the containers, and maintaining the surface of the supporting bar engaging said sleeves at a temperature below 200.degree. F to avoid sticking of the plastic thereon.
The method of forming an encircling polyethylene covering on the exterior surface of a container article comprising:
Dependencies are inferred from the claim text.