Extruder for the manufacture of a synthetic resin foil in the sh

Details Extruder for the manufacture of a synthetic resin foil in the sh Extruder for the manufacture of a synthetic resin foil in the sh

1975-10-30

1977-12-06

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

425378R, B29F 308

Patent

active

040614565

ABSTRACT:
Synthetic resin extruder comprising a rotatable extrusion head surrounded by a hollow ring rigidly secured, the interior of the ring communicating with a controllable supply of air for the head, said ring having an outer sliding face, in which are provided a number of passages equally spaced apart and closed by non-return valves having a portion projecting out of the sliding face, said face co-operating with a spring-controlled stationary shoe with a depression being provided with an air supply and the bottom of the depression co-operating with the valves to urge these into the open position.

REFERENCES:
patent: 3068517 (1962-12-01), Blackmore
patent: 3170011 (1965-02-01), Cheney et al.
patent: 3341888 (1967-09-01), Bridge et al.
patent: 3649143 (1972-03-01), Papesh et al.
patent: 3700370 (1972-10-01), Hearns et al.
patent: 3894558 (1975-07-01), Pedersen
patent: 3918486 (1975-11-01), Cyphelly

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