Plastic article or earthenware shaping or treating: apparatus – Press forming means – press reshaping means – or vulcanizing... – Means corrugating a preform
Patent
1978-05-05
1979-05-15
Schulz, William E.
Plastic article or earthenware shaping or treating: apparatus
Press forming means, press reshaping means, or vulcanizing...
Means corrugating a preform
148 4, 156461, 425336, A01J 2100
Patent
active
041545656
ABSTRACT:
An improved corrugator roll for use in an apparatus for making corrugated paperboard wherein the flute tip and a portion flank of the roll base metal are selectively hardened to a predetermined depth by an electro magnetic process. The valleys of the flutes and the remainder of the flank are maintained at the same hardness as the base material.
REFERENCES:
patent: 3256566 (1966-06-01), Campbell
patent: 3390040 (1968-06-01), Moser et al.
patent: 3802927 (1974-04-01), Gomada
patent: 3850698 (1974-11-01), Mallozzi et al.
patent: 4122240 (1978-10-01), Banas et al.
Hyde Glenn F.
Kasinoff Harvey A.
Morgret Gordon L.
Pfunder Richard R.
Thomas Charles E.
Brumback Oscar B.
Koppers Company Inc.
Schulz William E.
Sivak Thomas L.
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