Method for obtaining hollow articles

Details Method for obtaining hollow articles Method for obtaining hollow articles

1977-03-16

1978-03-28

Mehr, Milton S.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

B21D 2602

Patent

active

040807029

ABSTRACT:
The disclosure teaches a method for the manufacture of hollow articles useful as heat exchangers including the steps of rolling together two sheets of metal with at least one metal tube sandwiched therebetween to form a bonded assembly. The metal tube is subsequently expanded by the introduction of pressure therein to form an internal passageway.

REFERENCES:
patent: 2828533 (1958-04-01), Fromson
patent: 3334398 (1967-08-01), Middleton
patent: 3728778 (1973-04-01), Middleton

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