Title: Method for forming solid friction material structures

Abstract: An improved method is provided for forming rigid friction material structures from dry friction material having as major constituent elements substantial quantities of both asbestos fiber and thermosetting resin, whereby release of asbestos fibers to the atmosphere is substantially eliminated. The improved method builds upon known molding and charge preforming techniques which have been practiced using apparatus available heretofore.

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Inventors: Moneghan, Edward E. (Hatboro, PA, US)

Application Number: 799874
Filing Date: 1977-05-23
Publication_date: 1979-02-06
Assignee: Pennwalt Corporation (Philadelphia, PA)
Primary Class(es): 264/40.4 264/40.7, 264/68, 264/122, 264/323, 264/325
Other Classes:
US Patent Ref:

2647283	Aug, 1953	Quear	264/119.
3334163	Aug, 1967	Gilbert	264/122.
3505446	Apr, 1970	Griffith	264/122.
3661485	May, 1972	Arpajian	425/162.

Other Refs:
Primary Examiner: Pavelko, Thomas P.
Assistant Examiner:
Attorney: Quinn; Charles N.