Muzzle for printhead assembly

A combination comprising:

• a printhead device comprising:
• an ink cartridge body that defines a chamber, the ink cartridge body being made of a material selected from the group of materials consisting of:
• nylon, polyethersulfone, polypropylene, polyethylene, polyoxymethylene, and other materials that are compatible with ketone, acetate, and alcohol based inks;
• an ink reservoir disposed within the chamber of the ink cartridge body that receives and contains ink;
• a lid disposed over the chamber of the ink cartridge body, the lid comprising an air vent;
• a printhead chip provided on the ink cartridge body and in fluid communication with the ink reservoir so as to receive ink from the ink reservoir for ejection of the ink onto a print medium;
• and
• a nozzle plate;
• and
• a cap comprising:
• a main body comprising a side wall, a top wall, and a bottom wall, the top wall and the bottom wall in a facing relation to one another so that the printhead device is held between the top and bottom walls;
• a vent seal disposed within an opening in the top wall and in engagement with the air vent of the lid of the printhead device;
• a nozzle plate seal disposed within an opening in the bottom wall and in engagement with the nozzle plate of the printhead device;
• and
• a nozzle plate seal retainer that holds the nozzle plate seal within the opening in the bottom wall,
• wherein the nozzle plate seal comprises an elevated portion that engages with the nozzle plate of the printhead device, and
• wherein the nozzle plate seal retainer comprises an elevated portion adapted for engagement with an opening of the nozzle plate seal.