Method of forming rings

Patent

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Details

72393, B21D 5332

Patent

active

040845265

ABSTRACT:
A method of forming annular rings having portions of the ring material disposed radially of the ring axis from strips of flat material by forming cylindrical work-pieces from elongated strips of material with the ends of each of the strip being welded together to form a cylindrical work-piece having its material extending axially of the ring, supporting spaced annular portions at the inner circumference of the work-piece, and displacing a portion intermediate the internal annular portions of the work-piece radially outwardly while the outer perimeter of the work-piece is unsupported.

REFERENCES:
patent: 743193 (1903-11-01), Rainforth
patent: 805868 (1905-11-01), Marshall
patent: 1637318 (1927-07-01), Stresau et al.
patent: 1841879 (1932-01-01), Croxford
patent: 1910652 (1933-05-01), Taylor
patent: 2089476 (1937-08-01), Grotnes
patent: 2435306 (1948-02-01), Grotnes
patent: 3357229 (1967-12-01), Luedi
patent: 3798728 (1974-03-01), Beisch
patent: 3952575 (1976-04-01), Straza et al.

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