Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Severing means is perforator
Patent
1987-01-09
1988-10-18
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Severing means is perforator
264145, 264154, 425 63, 425308, 425385, 425457, B28B 1108, B28B 1112
Patent
active
047783710
ABSTRACT:
An apparatus for forming frogs in the sides of a slipformed concrete element, especially a hollow-core slab is disclosed. In accordance with the invention, the frogs are formed in the sides of the element by removing cast material from the sides by a reciprocative scraping action. The reciprocative movement parallel to the side of the element is effected with a drive motor and a lever assembly. By the method, it is possible to obtain a desired frog shape and depth without damaging the side surfaces.
REFERENCES:
patent: 214374 (1879-04-01), Dows et al.
patent: 850428 (1907-04-01), Grant
patent: 1160307 (1915-11-01), Mattes
patent: 1559682 (1925-11-01), Doughty
patent: 1787219 (1930-12-01), Trotter et al.
patent: 2031899 (1936-02-01), Mattes
patent: 2582645 (1952-01-01), Milliken et al.
patent: 2583600 (1952-01-01), Schreiber
patent: 3044391 (1962-07-01), Pellett
patent: 3781154 (1973-12-01), Herbert et al.
patent: 3904341 (1975-09-01), Putti
patent: 3972666 (1976-08-01), Pandur
patent: 4125348 (1978-11-01), Martens
patent: 4133619 (1979-01-01), Wise
patent: 4568503 (1986-02-01), Laine et al.
patent: 4608216 (1986-08-01), Barsk
patent: 4668447 (1987-05-01), Paakkinen
patent: 4674970 (1987-06-01), Kankkunen
patent: 4674971 (1987-06-01), Kankkunen
Housel James C.
KT-SUUNNITTELU Oy
Woo Jay H.
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