Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – And means to form or reshape preform
Patent
1986-04-07
1987-04-14
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
And means to form or reshape preform
249 83, 249112, 249122, 271 82, 425117, 425126R, 425253, B28B 736
Patent
active
046574980
ABSTRACT:
Apparatus for making lined concrete pipe in a reduced time, and provision of such pipe with reduced tendencies to rusting and liner separation, are achieved by a cartridge assembly movable to and away from the pipe machine, a work stand assembly for positioning the cartridge to receive a liner, liner tensioning structures and liner to cartridge clamps for moving the liner to the cartridge, tightening the liner, and holding the liner during transport by the cartridge, and tension bars controlling wire tension during pipe formation. Concurrently with operation of the standard pipe machine, the work stand operates to place a liner on the cartridge. During the stripping cycle of the pipe machine, the cartridge delivers the liner to the core. During the pipe machine vibration under pressure cycle, the tension on the liner tension wires is relieved.
REFERENCES:
patent: 1996741 (1935-04-01), Benge
patent: 2816323 (1957-12-01), Munger
patent: 3114173 (1963-12-01), Boggs et al.
patent: 3836612 (1974-09-01), Mann
patent: 3971553 (1976-07-01), Cosmo
patent: 4063724 (1977-12-01), Suda
patent: 4101122 (1978-07-01), Jeschke
patent: 4202268 (1980-05-01), Becker
patent: 4526360 (1985-07-01), Focke
patent: 4542883 (1985-09-01), Rutzki
Schmidgall Hartzell H.
Schmidgall Jon A.
Hawkeye Concret Products Co.
Hoag Willard E.
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