Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent
1990-03-02
1992-04-21
Larson, Lowell A.
Metal deforming
By tool-couple pressing together adjacent surface portions...
To form helically-seamed tube
72135, B21C 3712
Patent
active
051056399
ABSTRACT:
An apparatus for forming and slitting spirally formed pipe, particularly spiral pipes having a diameter of approximately one inch or less, is disclosed. The pipe forming apparatus includes an enclosed forming head and a mandrel. A continuous strip of metal is driven around the mandrel and inside a lateral bore in the forming head in a helical manner. First and second rollers mounted in the forming head partially form a spiral lockseam. A third roller mounted in the upper portion of the forming head closes the spiral lockseam. The mandrel is both rotatable and pivotable. The device for slitting the spiral pipe into sections includes a first knife that is positioned inside the spiral pipe. This knife is mounted at the endd of a rotatable boom, that extends through the mandrel and is positioned inside of the spiral pipe. A second rotatable knife is positioned outside of the pipe. A rotatable support roller is also positioned outside of the pipe, and opposite the outer knife. To cut the pipe, the outer knife punctures the pipe and overlaps the inner knife, and the support roller abuts the opposite side of the pipe. The inner and outer knives and the support roller move axially with the pipe. As the pipe continues to rotate, it is completely severed.
REFERENCES:
patent: 2516817 (1947-06-01), Wernli
patent: 2862469 (1958-12-01), Jensen
patent: 3085529 (1963-04-01), Admerand
patent: 3132616 (1964-05-01), Hale
patent: 3268137 (1965-05-01), Martin
patent: 3538728 (1970-11-01), Trihey
patent: 3753363 (1973-08-01), Trihey
patent: 3753367 (1973-08-01), Trihey
patent: 3863480 (1975-02-01), Meserole
patent: 4569386 (1986-02-01), Mine
patent: 4706481 (1987-11-01), Castricum
"Statement Pursuant to 37 C.F.R. .sctn.1.97-1.99"; author: James R. Sobieraj; dated May 19, 1989; re U.S. Ser. No. 07/315,373 (Castricum).
EPO Search Report of European Patent App. No. EP 90301443.9, dated Mar. 19, 1990.
EPO Search Report of European Patent App. No. EP 89113808, dated Nov. 6, 1989.
EPO Application No. EP 89113808.
Larson Lowell A.
McKeon Michael J.
Spiro America Inc.
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