Plastic article or earthenware shaping or treating: apparatus – Diverse distinct type shaping means – Shaping orifice and either a downstream preform reshaping...
Patent
1975-01-28
1977-07-26
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Diverse distinct type shaping means
Shaping orifice and either a downstream preform reshaping...
425380, 425393, 425396, 425467, B29D 2304
Patent
active
040380114
ABSTRACT:
An apparatus and method are provided for forming tubing by extrusion of a plastic or metal in an extrusion die over a mandrel supported within the die opening, and immediately after the tubing leaves the die but is still supported by the mandrel, operating thereon to provide a plurality of circular formations in the outer surface of the tubing for improving the physical characteristics of the tubing wall. In one form, the circular formations are provided by means of two or more reciprocating tools which engage and compress the freshly formed tubing against the mandrel, in an intermittent manner so as to form circular corrugations or thread-like formations in the outer stratum of the tube wall while the inside surface of the tube is maintained substantially in the configuration of the mandrel over which it is formed.
REFERENCES:
patent: 2449139 (1948-09-01), Posner
patent: 2657431 (1953-11-01), Slaughter
patent: 3025562 (1962-03-01), Nelson
patent: 3052916 (1962-09-01), Campbell
Husar Francis S.
Rosenbaum Mark
LandOfFree
Apparatus for forming ribbed tubing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for forming ribbed tubing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for forming ribbed tubing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-723668