Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1979-04-30
1980-10-28
Kittle, John E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428273, 428417, 428522, B32B 2710, B65D 556
Patent
active
042307643
ABSTRACT:
Thermoforming, utilized for making articles from sheets of thermoplastic ins, does not readily yield articles having desired strength properties. Using both thermoplastic and thermosetting resins in the process results in articles embodying fabrication stresses akin to those in prestressed concrete.
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patent: 3080267 (1963-03-01), Schmalz
patent: 3446686 (1969-05-01), Butler et al.
patent: 3654012 (1972-04-01), Schlager
patent: 3697369 (1972-10-01), Amberg et al.
patent: 3931836 (1976-01-01), Thiele
Dean Edward H.
Figge Irving E.
Edelberg Nathan
Gibson Robert P.
Kittle John E.
The United States of America as represented by the Secretary of
Wilson, Jr. Norman L.
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