Abstract: A printer ribbon cartridge (10) containing an internal re-inking mechanism (12) for re-inking the ribbon (14) housed in the cartridge is provided. The internal re-inking mechanism (12) comprises a drive assembly (30), pump (24), an eccentric (26), an ink reservoir (22), an ink feeding tube (34), a re-inking ring (30) and a transfer roller (38). As the ribbon (14) is threaded and propelled through the drive assembly (30), the drive assembly drives the pump (24) via the eccentric (26). The pump (24) pumps ink from the ink reservoir (22) to the re-inking ring (36) through the ink feeding tube (34). The ink is transferred from the re-inking ring (36) to the ribbon (14) via the transfer roller (38).

Abstract: An ink reservoir (34) capable of maintaining an even distribution of a single color of ink on a printer ribbon is provided. The ink reservoir is used in ribbon cassettes (10) for typewriters and dot matrix printers. The ink reservoir (34) includes a series of cylindrical ink-carrying elements (50) separated by a series of separating sheets (52). The separating sheets (52) restrict or prevent the flow of ink from one ink-carrying element to another element. This maintains an even distribution of ink throughout the height of the reservoir which, in turn, results in an even transfer of ink from the ink reservoir onto a transfer roller and subsequently onto a ribbon. The even distribution of ink in the ribbon results in an even distribution of ink in the characters printed using the ribbon and, thus, improves print quality.