Method and apparatus for expansion of fibrous mats
United States Patent 2486217

Inventors:
Slack, Robert E.
Hedges, Lee M.
Publication Date:
10/25/1949
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Assignee:
Johns, Manville
Primary Class:
Other Classes:
26/71, 428/906, 428/392, 38/44, 19/161.100, 19/258
International Classes:
D04H3/02
Foreign References:
GB191419372A