US Patent 7780276 System for refilling inkjet cartridges

Systems and methods for refilling inkjet printer cartridges are described. The system includes at least one rotary valve that contains a plurality of ports and a common port. The system further includes at least one pump in liquid communication with the common port of the rotary valve. At least one ink source is in liquid communication with at least one of the ports of the rotary valve, and at least one dispensing line is connected to at least one of the ports, where the dispensing line is configured to provide ink to an inkjet printer cartridge.