Metal deforming – By use of 'flying tool' engaging moving work – With cutting
Patent
1979-09-19
1981-11-03
Larson, Lowell A.
Metal deforming
By use of 'flying tool' engaging moving work
With cutting
29 61, 428597, B21D 3102
Patent
active
042978661
ABSTRACT:
A method of forming elongated slit segments in deformable strip includes concurrently slitting and preforming the strip by intermeshing substantially convexly shaped tool surfaces each having a linear leading portion and a linear trailing portion joined by a rounded apex portion. The linear leading and trailing portions are collinear with and generally define portions of the sides of a triangle which has a base with a length equal to the length of the strip being slit. The length of the side of the triangle corresponding to and collinear with the leading portion is less than the length of the side of the triangle corresponding to and collinear with the trailing portion, and the angle formed between the side of the triangle corresponding to the leading portion and the base is not greater than 90.degree..
REFERENCES:
patent: 3760470 (1973-09-01), Feisenthal
Laurie Gordon H.
Marlow John V.
Sakauye Randall T.
Seymour Theodore J.
Cominco Ltd.
Delbridge Robert F.
Fors Arne I.
Larson Lowell A.
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