Device for forming an annular raised rib on a tubular member

Details Device for forming an annular raised rib on a tubular member Device for forming an annular raised rib on a tubular member

1977-04-29

1978-07-25

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

425DIG218, 425457, 249178, 249184, B29C 1700

Patent

active

041026233

ABSTRACT:
A device and method for forming an annular raised rib on a tubular member includes a mandrel having a primary portion which has a secondary portion slidably mounted on the outer end thereof. The inner end of the primary mandrel carried by a base. An expandle ring is carried by the secondary mandrel and the outer end of the primary mandrel. Further included is a movable die with means for moving the die to and upon the primary mandrel. The secondary mandrel is formed with an annular frusto-conical ramp for expanding the ring radially outwardly thereof which forces the wall of the tubular member outwardly thereby forming an annular raised rib on a tube of plastic mounted on the mandrels when the secondary mandrel is moved to and upon the primary mandrel.

REFERENCES:
patent: 3205535 (1965-09-01), Niessner et al.
patent: 3248756 (1966-05-01), Mills et al.
patent: 3425093 (1969-02-01), Ansette
patent: 3484900 (1969-12-01), Sands et al.
patent: 3728059 (1973-04-01), DEPutter
patent: 3823216 (1974-07-01), Petzetakis
patent: 3989440 (1976-11-01), Acda
patent: 3998578 (1976-12-01), Acda

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