Ink-dispensing system and method for silk-screen printing having squeegee stroke movement counter

摘要

Disclosed is a system for dispensing ink to a silk screen for printing thereby. A squeegee is reciprocated relative to the silk screen and each cycle of movement provides an air pulse to a counter. The counted pulses are compared with a preset number of pulses based on the actual amount of ink which is used during the printing operations. When the counted pulses are counted up to the preset number, a control signal is fed to a valve to operate a piston and cylinder assembly which is coupled to a piston to force a measured quantity of ink from a cylinder. The cylinder is fed with a supply of ink from an ink pot. A check valve in the bottom of the cylinder opens only when the ink in the cylinder is pressurized by the piston. The measured quantity of ink dispensed from the cylinder is delivered by a conduit to the silk screen.