Method and apparatus for expansion of fibrous mats
United States Patent 2486217
Inventors:
Slack, Robert E.
Hedges, Lee M.
Publication Date:
10/25/1949
Assignee:
Johns, Manville
Other Classes:
26/71, 428/906, 428/392, 38/44, 19/161.100, 19/258
International Classes:
D04H3/02