Bag closing apparatus

  • US 7,032,875 B2
  • Filed: 05/13/2005
  • Issued: 04/25/2006
  • Est. Priority Date: 04/26/2000
  • Status: Expired due to Term
First Claim
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1. A pinch valve, for regulating a material flow, comprising:

  • a housing;

    at least three pivot arms, each of the pivot arms having first and second ends and an arcuate portion therebetween, pivotably connected to the housing adjacent one of the ends thereof and located relative to each other such that each of the pivot arms crosses at least two other ones of the pivot arms to define a confined closure area;

    an actuator for moving the pivot arms along an arcuate path between a spread position wherein the closure area has a predetermined area and closed positions wherein the closure area has a smaller area; and

    a tubular bladder having a first end for receiving material and a second end for discharging material extending through the confined closure area, the bladder being displaceable by the pivot arms to a substantially closed position upon the actuator being activated.

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