Method of injection molding opening devices on sheet material for packaging pourable food products, and packaging material and package obtained thereby
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United States of America Patent
Stats
-
Jan 16, 2018
Grant Date -
Oct 17, 2013
app pub date -
May 2, 2013
filing date -
Jun 28, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A method of injection molding an opening device on sheet packaging material for packaging pourable food products; the packaging material has at least a first and a second layer, and an opening formed through the first layer and sealed by a cover portion of the second layer; the method includes the steps of injecting molten plastic material onto a first side of the cover portion of the second layer, feeding the molten plastic material along the cover portion to cover it on the first side, and feeding the molten plastic material through an annular peripheral portion of the cover portion to form a spout of the opening device projecting from a second side, opposite the first side, of the cover portion; the molten plastic material covers the cover portion to define, with the cover portion, a user-removable sealing portion of the spout.
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Family
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Cited Art Landscape
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