| 摘要 |
An apparatus for printing a viscous material onto a surface of a board through the medium of a screen having openings therein. The apparatus comprises a viscous material dispenser(S) of the type having a box-like housing(A) in which a chamber(5) for containing the material and a slit-like bottom aperture(3) communicating therewith are provided. A pair of blades (2A, 2B) depend from the housing (A) on opposite sides of the bottom aperture(3). A rear wall(8) of the housing(A) comprises a fixed upper wall section(8A) and a lower flap wall section(8B) swingably and slidably connect ed thereto and depending therefrom. The lower flap wall section(8B) defines th e rear side of the bottom aperture(3). One of said blades which serves as a squeegee blade is fixed to the flap wall section. The flap wall section(8B) is connected to a pair of manually operable height-adjustable devices (22) respectively mounted on said housing and for adjusting the height of the fla p wall section (8B) having the squeegee blade(2B) so that by adjusting said height by means of said devices the contacting pressure of the lower end of said blade(2B) to be applied against the upper surface of said screen(1) can be adjusted as desired. Also, the flap wall section(8B) is operatively engaged with a pair of actuating means(B) respectivelymounted on said housin g and for closing said aperture(3) when the dispenser is in a non-printing position and for opening it to supply a predetermined amount of the material contained in said chamber(5) onto the screen(1) through said aperture when the dispenser is in a printing position.
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