Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – And means to apply stress to preform and uniting in stressed...
Patent
1979-03-14
1981-02-10
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
And means to apply stress to preform and uniting in stressed...
264 71, 264228, 264297, 425144, 425211, 425289, 425432, B28B 2304
Patent
active
042498732
ABSTRACT:
Apparatus for forming prestressed concrete beams comprising groups of molds, each group forming a module, with the modules arranged consecutively and tracks are placed alongside the modules. Plates seal off the ends of each mold and the beams are lifted off the molds by the plates after the prestressing wires have been cut.
REFERENCES:
patent: 2394228 (1946-02-01), Barber
patent: 2556928 (1951-06-01), Ludlow
patent: 3608163 (1971-09-01), Harford
patent: 3659077 (1972-04-01), Olson
patent: 3666385 (1972-05-01), Baker
patent: 3827132 (1974-08-01), Bratchell
patent: 3899281 (1975-08-01), Jakobs
patent: 4051216 (1977-09-01), Bratchell
patent: 4061454 (1977-12-01), Borcoman
patent: 4105382 (1978-08-01), Auer
B. M. Costamagna et Cie
Pavelko Thomas P.
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