Supply cartridge for an electrostatographic printer or copier

摘要

A supply cartridge for a printer or copier retains a quantity of dry marking material. The cartridge defines a round structure on an exterior thereof, with a collar rotatable about the round structure. The round structure and the collar both define openings, and the cartridge can dispense marking material when the openings are aligned. A pad is attached to an inner surface of the collar to enhance urging of the collar against the opening of the cartridge when the cartridge is closed. The pad itself urges against the round structure at a point on the circumference of the round structure opposite the opening therein. Alternately, a protrusion can be provided in the round structure at a point opposite the opening.