Abstract: A method for printing a graphic having uniform ink density on selected pixel locations of a printing screen coated with a light sensitive emulsion is provided. According to one embodiment of the invention, only some of the pixel locations are printed as required to form a desired image during the first pass of a printhead across a strip of the emulsion coated screen. The remaining pixel locations are printed as required during a second pass of the printhead across the strip. According to a second embodiment of the invention, a portion of the pixel locations in each strip are re-printed on the next succeeding pass of the printhead across the screen.

Abstract: The response time and power consumption of a solenoid-type actuator are minimized through exercising control over a transistor connected in series with the solenoid coil and a current source. Upon receipt of a command signal the series connected transistor is driven into saturation for a period of time commensurate with the current flow through the coil to rise to the level where a magnetic field of sufficient magnitude to pull in the solenoid plunger will be generated. The solenoid current is, once the solenoid armature moves, reduced to that level needed to maintain the field by controlling the transistor such that there is a constant voltage across the solenoid winding.