Abstract: Ink jet replacement cartridge (1) has a hinged cover (5, 3) and receives replacement bag (21) having an internal ink-containing bag (15) and internal absorbent paper (23) in external bag (25), which has an opening (27) to receive excess ink from printer. Only the external bag and its contents is replaced. The absorbent paper holds ink so the used bag is clean to handle.

Abstract: Printer ribbon cartridge (1) has a re-inking roller (3) mounted on brackets (33, 35) of a mounting member (31). A leaf panel (45) biases the re-inking roller into transfer roller (5). To prevent failures resulting from permanent deformation of the re-inking roller which can occur during periods of non-use, the transfer roller is mounted on a shaft (9) which is smaller than the central hole (7) of the transfer roller. The printer ribbon (11) is positioned around the transfer roller where tension during normal ribbon feed will force the transfer roller firmly into the re-inking roller, where the ribbon is re-inked prior to entering the stuffed chamber (19) of the cartridge. During periods of non-use the transfer roller moves with respect to its shaft to relieve deformation pressure on the re-inking roller.

Abstract: A printhead is formed by injecting unfilled nylon by injection unit 1 and mineral filled nylon by injection unit 3. The filling adds impact resistance for printing, while the unfilled nylon is particularly resistant to flexural fatigue near the hub of the printwheel. Unit 1 is operated first to form an outer layer, with quantity limited so that the outer layer comes to about the middle of the arms of printheads. Unit 3 is then operated to form a core and to be the only material forming the character elements. The resulting printhead is durable and is capable of use at greater deflection than the same printhead made of only the impact resistant material.