VENTED PLUG FOR INK CARTRIDGES

摘要

The subject invention is directed to a cartridge (14) for a writing instrument ( 10). In particular the writing instrument includes a surface against which the cartridge abuts. The cartridge includes a tubular body for containing ink which has a front end including an applicator (15) for applying the ink, and a plug member (16) disposed at least p artially in a rear end of the tubular body of the cartridge. The plug member includes a path (26) for permitting airflow into the tubular bod y, and a flange (34) for cushioning the cartridge against the abutment surface of the writing instrument so as to inhibit separation of th e ink from the ink applicator and absorb pressure exerted upon the ink applicator during writing.