Method for sealing a plastics lid to a container of plastics-coated paper board and apparatus for carrying out the method
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United States of America Patent
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Aug 12, 1980
Grant Date -
N/A
app pub date -
Feb 17, 1978
filing date -
Feb 18, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus used for sealing a plastics lid to a container of plastics-coated paper board, the lidded container at several locations in the area which the lid joins the container, being supplied with energy in the form of electromagnetic microwaves, and the energy being absorbed in the paper board to melt for welding of the lid to the container.
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