Method of reinforcing flattened tubular film with tape layers
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United States of America Patent
Stats
-
Jul 15, 1980
Grant Date -
N/A
app pub date -
Mar 3, 1978
filing date -
Mar 8, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flattened tube of continuous film is opened up by being fed over a mandrel which is floatingly disposed within the tube. As the tube is passing over the mandrel, which serves as a backing, a layer of reinforcing tapes is helically wound thereabout and fixed thereto, whereafter the tube is flattened again. Each side of the tube is then successively provided with a layer of parallel further reinforcing tapes which are anchored by a plastics covering layer that is extruded thereon and pressed thereto.
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International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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