Apparatus for forming and threading tubing

Details Apparatus for forming and threading tubing Apparatus for forming and threading tubing

1979-08-24

1981-12-15

Lowe, James B.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Means for forming from bulk material, means for severing and...

425142, 425155, 425163, 425164, 425304, 425380, 425385, 425460, 425DIG218, B29D 100, B29C 1710, B29D 2304

Patent

active

043057047

ABSTRACT:
An apparatus and method for continuously forming tubing by extrusion wherein selected positions of the length of the tubing are irregularly shaped with a formation such as a pipe or tube thread and wherein such forming occurs while the tubing is passing from the extrusion die. The apparatus also includes means for predeterminately cutting the extruding tube to lengths with each length containing a thread-like formation in its wall at either or both ends thereof. As a result the necessity of post operating on the extrusion in a secondary threading operation to form threads at its ends, is eliminated.

REFERENCES:
patent: 2497724 (1950-02-01), Gilson et al.
patent: 2754562 (1956-07-01), Webb
patent: 2931069 (1960-04-01), McCormick
patent: 3329998 (1967-07-01), Stohr
patent: 3387069 (1968-06-01), Stohr
patent: 3540094 (1970-11-01), Janssen

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