Sealing of container closure
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United States of America Patent
Stats
-
Aug 29, 1989
Issued Date -
N/A
app pub date -
Aug 11, 1988
filing date -
Oct 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spouted, gable-topped carton has its top closure fin sealed by welding employing an ultrasonic horn and an anvil giving a suitable profile of contour sealing of the fin. There is a straight continuous lengthwise seal where the fin is two-ply and a meandering continuous lengthwise seal where it is four-ply, while the sealed portions of the four-ply spout part of the fin are of lesser total extent in proportion to the area of that spout part than are the sealed portions of the other four-ply part of the fin in proportion to its area.
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Cited Art Landscape
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