Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1990-09-17
1993-01-19
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 467, 264 469, 264 54, 264278, B29C 6722
Patent
active
051805316
ABSTRACT:
As structural plastic pipe has an outer diameter of at least 10 inches and is suitable for use as a plastic piling. The pipe is at least 10 feet long and comprises an inner pipe core of no more than 6 inches in diameter. There is an outer, extruded, continuous, substantially homogeneous plastic layer at least two inches thick on substantially the entire length of the steel core. The plastic layer comprises low density polyethylene, high density polyethylene, polypropylene, foaming agent, and antioxidant, as well as a synergist for the antioxidant. The plastic layer is extruded directly onto the pipe core in a single extruding operation. A die head can be used for imparting rotational motion to an extruded plastic composition before it is introduced into a mold used for forming the plastic pipe to make certain that the entire mold is filled with the plastic composition.
REFERENCES:
patent: Re31354 (1983-08-01), Eckner
patent: 3200554 (1965-08-01), Goodman et al.
patent: 3253066 (1966-05-01), Hardy et al.
patent: 3306960 (1967-02-01), Weissman et al.
patent: 3342913 (1967-09-01), Engel
patent: 3425092 (1969-02-01), Taga
patent: 3528458 (1971-09-01), Gaeckel
patent: 3606635 (1971-09-01), Benteler et al.
patent: 3611736 (1971-10-01), Goodman
patent: 3619436 (1971-11-01), Gruss et al.
patent: 3736759 (1973-06-01), Blose
patent: 3922828 (1975-12-01), Patton
patent: 3978181 (1976-08-01), Vahle
patent: 3993265 (1976-11-01), Parks
patent: 4141951 (1979-02-01), Beckman
patent: 4146562 (1979-03-01), Fukushima et al.
patent: 4161090 (1979-07-01), Watts, Jr.
patent: 4187352 (1980-02-01), Klobbie
patent: 4244156 (1981-01-01), Watts, Jr.
patent: 4245931 (1981-01-01), Watts, Jr.
patent: 4323528 (1982-04-01), Collins
patent: 4351786 (1982-09-01), Mueller
patent: 4485057 (1984-11-01), Kristensson et al.
patent: 4604250 (1986-08-01), Ecker
patent: 4606953 (1986-08-01), Suzuki et al.
patent: 4626189 (1986-12-01), Hammer et al.
patent: 4629597 (1986-12-01), Charlesbois et al.
patent: 4708527 (1987-11-01), Inhofe, Jr. et al.
patent: 4725165 (1988-02-01), Langran
patent: 4738808 (1988-04-01), Hammer et al.
patent: 4743142 (1988-05-01), Shiraishi et al.
patent: 4762584 (1988-08-01), Andreasen et al.
patent: 4797237 (1989-01-01), Hammer et al.
patent: 4818148 (1989-04-01), Takeda et al.
patent: 4824627 (1989-04-01), Hammer et al.
Letter dated Aug. 6, 1986 from officials of Los Angeles Harbor.
Letter dated Jul. 30, 1987 from officials of Los Angeles Harbor.
Anderson Denton L.
Kuhns Allan R.
LandOfFree
Method of forming plastic piling does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming plastic piling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming plastic piling will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-100964