Metal deforming – By use of 'flying tool' engaging moving work – Including orbitally-moving tool-face
Patent
1987-05-18
1989-06-13
Larson, Lowell A.
Metal deforming
By use of 'flying tool' engaging moving work
Including orbitally-moving tool-face
72379, 29157R, B21D 1304, B21D 1310
Patent
active
048380679
ABSTRACT:
There is provided a method for inhibiting corrosion at elevated temperatures of a nonnesting accordion folded or wound corrugated thin metal strip. The strip is corrugated with a longitudinally running series of peaks and valleys by passing the strip through a set of corrugating gears, each of the corrugations including one longitudinally extending displacement deviating from and returning to an imaginary line extending between the longitudinal marginal edges of the strip. The corrugations are characterized further in that the deviation extends in the direction of movement of the strip through the corrugating gears and is first to enter and exit from such gears. This places the maximum of the deviation in compression which has been found to minimize corrosion, e.g., from the pollutants contained in the exhaust from an internal combustion engine.
REFERENCES:
patent: 1868302 (1932-07-01), Auger
patent: 2896692 (1959-07-01), Villoresi
patent: 3992162 (1976-11-01), Gewiss
patent: 4711009 (1987-12-01), Cornelison et al.
patent: 4748838 (1988-06-01), Cornelison
European Patent Application, Jan. 1983, Miura et al., 10 pages of spec. and 4 sheets of dwg. figures.
European Patent Application, Aug. 1985, Stevenson et al., 13 pages of spec. and 3 sheets of dwg. figures.
Larson Lowell A.
Trinker Steven T.
W. R. Grace & Co.,-Conn.
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