Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1979-07-09
1982-09-07
Silverman, Stanley S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
220334, 4285428, B32B 330
Patent
active
043484492
ABSTRACT:
An edge forming tool is pressed into a thermoplastic sheet which is supported on an anvil or counter tool. The edge forming tool is maintained at a temperature below the melting temperature of the thermoplastic sheet and a high frequency electric field is established between the edge forming tool and the counter tool. The high frequency electric field softens the thermoplastic sheet which is deformed by the edge forming tool. Thereafter, the softened and deformed portions of the thermoplastic sheet are allowed to cool and re-harden before the sheet is folded to form a bend therein.
REFERENCES:
patent: 1144765 (1915-06-01), Kelleher
patent: 1482569 (1924-02-01), Lange
patent: 2316384 (1943-04-01), Abramson
patent: 2425043 (1947-08-01), Moore
patent: 2500338 (1950-03-01), Bergstein
patent: 2589022 (1952-03-01), Page, Jr. et al.
patent: 2765716 (1956-10-01), Anderson
patent: 2949827 (1960-08-01), Kempen et al.
patent: 2954725 (1960-10-01), Palmer
patent: 3145904 (1964-08-01), Bromley
patent: 3158073 (1964-11-01), Rumberger
patent: 3240845 (1966-03-01), Voelker
patent: 3334802 (1967-08-01), Goodong
patent: 3381880 (1968-05-01), Lenallen et al.
patent: 3434399 (1969-03-01), Palmer
patent: 3526566 (1970-09-01), McIlvain
patent: 3534667 (1970-10-01), Krause
patent: 3594464 (1971-07-01), Ihde
patent: 3727825 (1973-04-01), Troth
patent: 3735674 (1973-05-01), Haddock
patent: 3768950 (1973-10-01), Ihde
patent: 3866523 (1975-02-01), Geshmender
patent: 3900550 (1975-08-01), Oliver et al.
patent: 3907193 (1975-09-01), Heller
patent: 4098430 (1978-07-01), Mattheis et al.
Herrin Melvin Bernard
Silverman Stanley S.
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