Patent ID: 6112656
Filing Date: 2000-09-05
Classification: B41F,H05K

Abstract:
A creamed-solder printing machine for printing a creamed solder on a printed circuit board, comprising:a screen having a plurality of holes;a squeegee which prints the creamed solder on the printed circuit board through the holes of the screen;a frame which supports the squeegee such that the squeegee is movable toward, and away from, the screen;at least one elastic member which is provided between the frame and the squeegee and which produces a biasing force to bias the squeegee in a direction toward the screen; andan adjustable-force applying device which is provided between the frame and the squeegee and which applies, to the squeegee, an adjustable force in a direction in which the adjustable force resists the biasing force of the elastic member,the adjustable-force applying device comprising at least one pressurized-fluid-operated cylinder device which includes a piston, a piston rod, and a cylinder housing; and a pressurized-fluid supplying device which supplies a pressurized fluid to the pressurized-fluid-operated cylinder device and adjusts a pressure of the pressurized fluid, wherein one of the piston rod and the cylinder housing is supported by the frame, the other of the piston rod and the cylinder housing is connected to the squeegee, and the elastic member is provided between the frame and said other of the piston rod and the cylinder housing.