Package making – Methods – Conforming by stretching or shrinking of cover over contents
Reexamination Certificate
2002-05-22
2008-12-30
Rada, Rinaldi I. (Department: 3721)
Package making
Methods
Conforming by stretching or shrinking of cover over contents
Reexamination Certificate
active
07469520
ABSTRACT:
A heat sealing device for sealing layers of plastic film together is provided. In a preferred embodiment, the heat sealing device is incorporated into a stretch wrapping apparatus for wrapping a load. The heat sealing device includes a heater element, an air compressor or blower, and a sealing head in fluid communication with the heater element to distribute the heated air. The sealing head is preferably flexible and includes a plurality of convection ports configured to apply heated air to a portion of the packaging material without being completely covered by the packaging material. At least one insulated film contact portion is provided to distance the convection ports from the plastic film.
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Eldridge David
Hack Steven
Lancaster, III Patrick R.
Finnegan Henderson Farabow Garrett & Dunner LLP
Lantech.com LLC
Paradiso John R
Rada Rinaldi I.
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