Method and apparatus for manufacturing foldable conduit

Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting

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29526A, 83343, 83861, 156504, 156555, 156517, 156353, B29C 2908

Patent

active

045273197

ABSTRACT:
A sleeve of plastic material from an extruder is molded by a blow molding apparatus into a tubular structure which includes two top walls longitudinally connected at base ends and apex ends. A splitting apparatus splits the longitudinally connected base ends apart to form two top walls. The top walls are oriented with their base ends upward. An extruder extrudes a flow of softened plastic which is divided by a manifold into four flows. Four applicators connected with the manifold apply beads of softened plastic along each top wall base end. A ribbed roller presses flexible strips against the plastic beads on each of the top walls. The flexible strips are fed from rolls of finite length mounted on a stand. The stand holds operating rolls and back up rolls. A splicing apparatus splices the trailing end of each operating roll with a leading end of the corresponding back up roll. An accumulator accumulates a reserve of the flexible strip between splices and feeds out the reserve during a splice such that the flexible strip is fed continuously to the ribbed roller. A perforator apparatus perforates the flexible strip and a vent trimmer perforates the top wall. A puller clamps the conduit in a folded configuration to pull it through the splitter, and ribbed roller. The folded conduit is cut to length and wound on reels.

REFERENCES:
patent: 1403740 (1922-01-01), Day
patent: 1606270 (1926-11-01), Stratford
patent: 2679924 (1954-06-01), Powell
patent: 2771534 (1956-11-01), Schwahn
patent: 2978791 (1961-04-01), Clar
patent: 3109339 (1963-11-01), Braun et al.
patent: 3248463 (1966-04-01), Wiley et al.
patent: 3307995 (1967-03-01), Martin, Sr.
patent: 3661679 (1972-05-01), Law
patent: 3732046 (1973-05-01), Martin et al.
patent: 3742906 (1973-07-01), Dupke
patent: 3767510 (1973-10-01), Gustafson
patent: 3786365 (1973-10-01), Howe
patent: 3834275 (1974-09-01), Newland
patent: 3910713 (1975-10-01), Maroschak
patent: 3947947 (1976-04-01), Hess et al.
patent: 4001067 (1977-01-01), Johnson
patent: 4115495 (1978-09-01), Hartitz
patent: 4116399 (1978-09-01), Mosburger et al.
patent: 4124426 (1978-11-01), Saul
patent: 4172755 (1979-10-01), Gustafson et al.
patent: 4194081 (1980-03-01), Medford
patent: 4233104 (1980-11-01), Fujishima et al.
patent: 4245924 (1981-01-01), Fouss et al.
patent: 4357190 (1982-11-01), Fouss et al.

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