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Dispensing apparatus

  • US 4,989,756 A
  • Filed: 02/03/1989
  • Issued: 02/05/1991
  • Est. Priority Date: 10/14/1986
  • Status: Expired due to Term
First Claim
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1. A paste-dispensing apparatus comprising:

  • a syringe which holds paste therein;

    an air supply source which supplies air under a positive pressure to said syringe;

    a dispensing electromagnetic valve provided between said syringe and air supply source, said valve being connected to said syringe via a first pipe and to said air supply source via a second pipe so that said syringe and air supply source communicate with each other when paste is dispensed;

    a first pressure sensor which measures the pressure inside of said first pipe;

    a second pressure sensor which measures the pressure inside of said second pipe; and

    a control section wherein pressures measured by said first and second pressure sensors are input, said control section outputting a voltage signal that actuates said dispensing electromagnetic valve so that said first and second pipes communicate with each other when the dispensing of paste is initiated, said control section further providing a means for controlling an output time of said voltage signal in accordance with changes in the time required for the pressure measured by said first pressure sensor to reach a preset pressure after said first and second pipes have been connected.

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