B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/145
B21D 53/02 (2006.01)
Patent
CA 1192030
ABSTRACT The method of making elongated heat exchangers having outwardly projecting fins disposed at various angles to the length and width of the heat exchangers wherein elongated tubular members are fed longitudinally past cutters which are reciprocated into and out of the tubular members in skiving actions and the angles of the cutters relative to the length and width of the tubular members moving therepast are changed between at least some or the reciprocations of the cutters.
403541
Kritzer Richard W.
Osler Hoskin & Harcourt Llp
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