US Patent 7603949 Screen printing device with ink control

An exemplary screen printing device includes a blade, a rotatable connecting element, a lower baffle, and an adjusting element. The rotatable connecting element is fixed to the blade. The lower baffle rotatably connects with the rotatable connecting element. The lower baffle and the blade cooperatively define a chamber for receiving ink therebetween. The adjusting element is connected to the rotatable connecting element. The adjusting element is capable of making the lower baffle rotate thereby opening a bottom of the chamber.