Package making – Methods – Conforming by stretching or shrinking of cover over contents
Patent
1987-08-12
1988-05-10
Culver, Horace M.
Package making
Methods
Conforming by stretching or shrinking of cover over contents
53488, 53557, 53329, B65B 5306, B67B 500
Patent
active
047426667
ABSTRACT:
A method and apparatus for forming tamper-evident, sealed containers are disclosed. A plurality of filled containers are respectively fitted with generally annular, heat-shrinkable seal members, with the seal members heated by passage through a heat tunnel so that they shrink into conformance with the respective containers. In order to further conform the heat-shrinkable members to the containers, the containers are passed beneath a rotatably driven, resiliently deformable foam roller assembly, which engages each seal member, and urges it downwardly into further conformance with its respective container. In the preferred form, the roller assembly is driven so that its peripheral speed is less than the speed at which the sealed containers are moved therebeneath.
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Arndt Carl
Mueller Martin J.
Culver Horace M.
Osgood Industries, Inc.
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