Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means for forming from bulk material – means for severing and...
Patent
1981-12-08
1984-07-10
Czaja, Donald E.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Means for forming from bulk material, means for severing and...
264 407, 264148, 425145, 425168, 425315, 425412, 425DIG48, B29C 1714
Patent
active
044590938
ABSTRACT:
Apparatus for severing thermoplastic sheet continuously produced from an extruder and successively feeding a length of plastic web to an intermittently operated forming machine. The extruded and cooled sheet drops from a roller down on a belt conveyor running at the same speed as the extrusion rate and is transferred towards the forming machine by a pair of clamp chains. The chains extend from sprocket wheels located in the range of the belt conveyor and are adapted to run intermittently at a speed higher than the extrusion rate and in accordance with the operation of the forming operation. The running speed of the conveyor belt can be increased to the higher speed when the falling sheet has been severed thereabove in the suspended position so that the severed plastic web is grasped by the clamp chains to be fed to the shaping station of the forming machine.
REFERENCES:
patent: 3332819 (1967-07-01), Siempelkamp
patent: 3346923 (1967-10-01), Brown et al.
patent: 3551546 (1970-12-01), Gosper et al.
patent: 3676539 (1972-07-01), Fisher
patent: 4072792 (1978-02-01), Araki et al.
patent: 4097566 (1978-06-01), Bertin et al.
Czaja Donald E.
Housel James
Kabushiki Kaisha Asano Kenkyusho
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