Envelopes – wrappers – and paperboard boxes – Paperboard box – With closure for an access opening
Patent
1993-07-01
1994-12-13
Shoap, Allan N.
Envelopes, wrappers, and paperboard boxes
Paperboard box
With closure for an access opening
215307, 215346, 215350, B65D 4302
Patent
active
053723007
ABSTRACT:
Opening device for a packaging container with an unbroken, liquid-tight pouring spout (31, 33) and a closure part (3) enclosing this. A method of manufacturing the opening device entails forming the pouring spout (21, 33) with the closure part (3) as a mould, with a heated, thermoplastic material layer being forced into the closure part through a pressure difference.
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McDonald Christopher J.
Shoap Allan N.
Tetra Laval Holdings & Finance S.A.
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