Patent ID: 6715415
Filing Date: 2004-04-06
Classification: B41F,H05K

Abstract:
A screen printing apparatus for printing paste onto a substrate via a pattern aperture of a mask plate, said screen printing apparatus comprising:a squeegee head for printing paste onto the substrate; a horizontal squeegee head driver operably coupled to said squeegee head; and a vertical squeegee head driver operably coupled to said squeegee head; wherein said squeegee head includes a pair of squeegees having opposite squeegeeing directions and being arranged for lower ends thereof to slide in contact with the mask plate at predetermined attack angles with respect to said squeegeeing directions, respectively; wherein said pair of squeegees are unitedly connected together to form a unitary squeegee pair; wherein said squeegee head further includes a horizontal pivot arrangement operably coupled to said united squeegee pair such that said united squeegee pair is freely rotatable about a horizontal axis that is generally perpendicular to said squeegeeing directions so as to allow said united squeegee pair to slide along the mask plate while maintaining both of said pair of squeegees in contact with the mask plate with the predetermined attack angles maintained constant even when the mask plate is slanted; and wherein a paste cell, in which the paste is to be stored on the mask plate, is defined between said pair of squeegees when said pair of squeegees is in contact with the mask plate.