Method improvements for controlling parison length
Patent 3943214 Issued on March 9, 1976. Estimated Expiration Date: 
March 9, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 9, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2750624 2854691 2928120 2952034 3002615 3759648 3795719 InventorApplicationNo. 495627 filed on 08/08/1974US Classes:264/40.7, Controlling rate of movement of molding material or its support in a continuous process264/542, With movement of parison or workpiece from one work station to another425/140, Control means responsive to product weight or dimension425/150, Mold motion or position control65/161, Glass working fluid or treating fluid control65/261BLOWING MEANS WITH BLOW MOLDExaminersPrimary: Silbaugh, Jan H.Attorney, Agent or FirmAbstractMethod for controlling the length of parison portions available for blow molding which includes use of 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 use of 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. The method involves varying the speed of movement of the carrier in response to such signal to thereby vary the rate at which molds are presented for receiving consecutive parison portions, and therefore the amount of the length of each such parison portion available to protrude beyond the cavity of a mold. | |
