Patent ID: 6571701
Filing Date: 2003-06-03
Classification: B23K,B41F,H05K

Abstract:
A printer for dispensing solder paste at predetermined positions on a printed circuit board, the printer comprising:a frame; a source of solder paste; a solder-paste dispensing head mounted to the frame, the dispensing head defining a chamber that has a longitudinal axis, the dispensing head also having at least one source port to which the source of solder paste is coupled so as to supply solder paste into the chamber, the solder-paste dispensing head also having a dispensing slot through which solder paste can exit the chamber and be deposited onto a printed circuit board; a stencil mounted to the frame and positioned to receive solder paste exiting from the dispensing slot of the chamber; a support apparatus coupled to the frame, the support apparatus positioned to place a printed circuit board mounted thereon in a position to receive solder paste that passes through the stencil; a stirring mechanism mounted within the chamber and extending through substantially all of the cross-section of the chamber perpendicular to the longitudinal axis of the chamber; and a drive mechanism coupled with the stirring mechanism for reciprocal displacement of the stirring mechanism through the chamber along the longitudinal axis of the chamber.