Patent ID: 7182443
Filing Date: 2007-02-27
Classification: B41J

Abstract:
1. An ink delivery system which comprises a first container; a flexible second container containing a supply of ink to be supplied to a print head of a printer, the second container being received within the first container and the second container having an outlet opening arranged to be accessible externally of the first container; a compressed gas interposed between an interior surface of the first container and an external surface of the second container to effect discharge of the ink through the outlet opening of the second container on demand; and a pressure regulator in fluid communication with the outlet opening of the second container, said pressure regulator comprising: (i) a passage defining member which defines a passage having an inlet aperture and an outlet aperture; (ii) a plunger arranged in the passage, said plunger having a bore extending there through, and being movable between a first position, in which the inlet aperture of the passage is close off, and a second position, in which the inlet aperture is open to permit the flow of ink through the bore and out through the outlet aperture of the passage; (iii) a coil spring arranged around the plunger, said coil spring being configured to maintain ink discharged from the outlet aperture at a predetermined pressure.