Package making – Methods – Conforming by stretching or shrinking of cover over contents
Patent
1988-11-10
1990-08-14
Spruill, Robert L.
Package making
Methods
Conforming by stretching or shrinking of cover over contents
53252, 53450, 53550, 53557, B65B 908, B65B 5302
Patent
active
049476050
ABSTRACT:
There is disclosed an apparatus for forming a shrink-wrapped package from polyolefin film which overcomes the problems of forming the bottom lap seal of the tubular package formed from the film and initial low strength of the heat seal at the forward end of the package, by positioning the static sealer for the bottom lap seal upstream from the heat sealer for the forward end of the package and by using a ram to move packages into the tubular package but to stop them short of the heat seal at the forward end of the package.
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E. I. Du Pont de Nemours and Company
Johnson Linda B.
Spruill Robert L.
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