Apparatus improvements for controlling parison length

Details Apparatus improvements for controlling parison length Apparatus improvements for controlling parison length

1975-08-06

1976-07-20

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

425150, 425326B, 425DIG231, B29D 2303

Patent

active

039704181

ABSTRACT:
In apparatus for controlling the length of parison portions available for blow molding which includes a carrier supporting a plurality of blow molds, a drive train for the carrier to consecutively position such molds beneath an extruder head and a logic module responsive to a control signal for regulating the length of parison portions protruding beyond the cavity of successively presented molds, the improvement which includes variable speed means responsive to such signal for changing the speed of movement of the carrier to vary the rate at which consecutive molds are presented to the head.

REFERENCES:
patent: 2750624 (1956-06-01), Coates et al.
patent: 2854691 (1958-10-01), Strong
patent: 2928120 (1960-03-01), Leghorn et al.
patent: 2952034 (1960-09-01), Fortner
patent: 3002615 (1961-10-01), Lemelson
patent: 3759648 (1973-09-01), Hunkar
patent: 3795719 (1974-03-01), Morecroft et al.

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