Apparatus and method for making inflated articles
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United States of America Patent
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Jan 26, 2021
Grant Date -
Oct 18, 2018
app pub date -
Jun 19, 2018
filing date -
Apr 12, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A sealing device generally includes a rotatable support cylinder having an outer, circumferential surface and a heating element disposed about such surface and secured thereto such that the heating element rotates therewith. The heating element is coiled about the outer surface of the cylinder in the form of an overlapping helical pattern. Juxtaposed film plies may be sealed together by bringing the sealing device into rotational contact with the juxtaposed film plies and heating the heating element to a temperature sufficient to cause the film plies to seal together.
First Claim
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International Classification(s)
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B31D:MAKING OTHER PAPER ARTICLES
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B65D:CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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