Duct-shaping machine and method

Details Duct-shaping machine and method Duct-shaping machine and method

1983-10-21

1986-02-25

Larson, Lowell A.

Metal deforming

By relatively movable offset tool-faces

Embodying three or more coacting relatively movable tools

72392, 72403, B21D 5114

Patent

active

045719802

ABSTRACT:
A duct-shaping machine having a pair of major-axis duct-shaping modules for elongating the cross section of a cylindrical duct as they are forced apart, a minor-axis compaction assembly having first and second compactors pressing inwardly towards the center line between the modules to flatten the sides of the duct.

REFERENCES:
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patent: 2916076 (1959-12-01), Young
patent: 3266285 (1966-08-01), Jensen
patent: 3312099 (1967-04-01), Koepf et al.
patent: 3403543 (1968-10-01), Gregory et al.
patent: 3561248 (1971-02-01), Bessho
patent: 3581548 (1971-06-01), Lilygren
patent: 3710609 (1973-01-01), Jones
patent: 3996783 (1976-12-01), Meserole
patent: 4027522 (1977-06-01), Clavin

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