Apparatus and method for screen printing of paste

Printing – Stenciling – Stencil and work support

Patent

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Details

101129, B41F 1518

Patent

active

061290149

ABSTRACT:
An apparatus for printing paste onto a surface of a printed circuit board through a screen having openings therein. The apparatus comprises a holder for holding the screen (5) horizontally in position, a vertically movable printing table (3) carrying the board (4) thereon a mechanically drivable squeegee device (1) for filling paste into openings (7) in the screen as the surface of the board is in contact with a lower surface of the screen (5), a drive for moving the printing table between a lower position, a raised printing position where printing of the board occurs and a higher third position higher than the printing position. The printing table (3) acts to push the screen upwardly, as it is raised from the printing position, so as to cause the screen to be elastically deformed into a substantially arcuate form so that the screen and the board are substantially separated from each other and printed paste deposits (8) are left on the board at the higher third position. Spacers (10) or (10') are provided for maintaining the screen separated from the printed paste deposits on the board until the printing table is lowered to the lower position.

REFERENCES:
patent: 5174201 (1992-12-01), Andris et al.
patent: 5450789 (1995-09-01), Hasegawa
patent: 5623872 (1997-04-01), Tomomatsu
patent: 5735203 (1998-04-01), Taniguchi et al.

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