Patent ID: 6171399
Filing Date: 2001-01-09
Classification: B05D,B41M,B41P,H05K

Abstract:
An apparatus for depositing a viscous material onto a substrate through openings formed in a stencil positioned over the substrate, comprising:a receptacle having a top and a bottom, and first and second longitudinal sides opposite one another for holding the material, said bottom having an aperture;a piston movable within said receptacle between said top and said bottom of said receptacle for applying a pressure to move the material toward said aperture; anda first wiper attached to said bottom of said receptacle at said first longitudinal side and a second wiper attached to said bottom of said receptacle at said second longitudinal side, wherein said first and second wipers are inclined at an angle with respect to a plane that is parallel to said bottom of said receptacle and wherein when the material is moved toward said aperture, the material is pushed against said first and second wipers such that said first and second wipers are pushed against the stencil;wherein when said apparatus is displaced along the stencil positioned over said substrate, an excess amount of the material left on the stencil is detached and lifted by one of said first and said second wipers.