Title: Process for forming metal pipes to a desired shape

Abstract: A process for forming metal pipes to a desired shape comprising fitting a metal pipe onto a model having same profile as the one desired to form, fixing the pipe thereon, arranging a plurality of metal rollers at same distance and around the metal pipe in such a manner that these rollers are in contact with the pipe always keeping their centers on the circumference of a concentric circle irrespective of the change in their position during their forward and backward movement relative to the longitudinal center axis of the model and rotating the metal pipe integral with the model in the longitudinal direction while forcing the rollers to move forwards and backwards.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Yoshimura, Tomio (Osaka, JA)

Application Number: 671940
Filing Date: 1976-03-30
Publication_date: 1977-07-19
Assignee: Zenzo Matsunaga (Tokyo, JA)
Primary Class(es): 72/85 72/81, 72/83
Other Classes:
US Patent Ref:

1499128	Jun, 1924	Shroyer	273/72.
1684206	Sep, 1928	Smith	72/83.
2330811	Oct, 1943	Darner et al.	72/81.
3109400	Nov, 1963	Paulton	72/83.
3477264	Nov, 1969	Sohlemann	72/81.
3810375	May, 1974	Oehm	72/81.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Larson, Taylor and Hinds