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Screen printing machine for through hole printing an electric conductor

  • US 5,113,788 A
  • Filed: 08/21/1990
  • Issued: 05/19/1992
  • Est. Priority Date: 08/22/1989
  • Status: Expired due to Fees
First Claim
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1. A screen printing machine comprising:

  • a table on which a substrate is to be put;

    a substrate adjusting means on said table for adjusting the position of a substrate on the table;

    a screen plate movable onto the table over a substrate;

    a squeegee movable on the plate for applying a paste to the substrate;

    a suction system connected with said table for applying suction to a substrate and through holes in the substrate;

    a degree of vacuum measuring means in the suction system for measuring the degree of vacuum in the suction system;

    an adjusting means in the suction system downstream of said measuring means for adjusting the degree of vacuum in the system; and

    control means connected to said adjusting means for controlling the adjustment of said adjusting means for producing a predetermined pattern of gradual change of suction in said suction system which should produce a predetermined degree of vacuum, said pattern being according to the positions, number and sizes of holes in a substrate to which paste is being applied on said table.

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