Abstract: A refillable ink ribbon cartridge including an adapter element which can be permanently inserted in a typewriter and receive a replaceable ink ribbon. The adapter includes a ribbon drive mechanism for advancing the ink ribbon cassette. The adapter includes a body portion and two extending legs and centering pins at the free ends and a ribbon tensioning lever. The cassette is formed with a body portion and two protruding legs with guiding elements to guide the ribbon across the free end of the legs. A drive wheel is rotatably mounted on a spring loaded arm to pull the ribbon through the cartridge, the arm is rotatable about a drive pin. Upon insertion of the refill cassette into the adapter, the two systems align and interact so that the ribbon is guided by the associated protruding legs and guiding elements to run smoothly through the cartridge.

Abstract: An ink ribbon cassette having a multicarbon ribbon for switching from a rapid to a slow multicarbon mode is provided. The cassette includes a coupling element to be driven by a printing device. The coupling element rotates a manually shiftable gear mechanism which includes two sets of gears, which are axially displaceable with respect to each other. Each set of gears includes gears of different sizes with a driving wheel mounted on one set of gears. The driving wheel engages the ink ribbon take-up reel. The ability to change the speed of the ribbon advance makes it possible to use the same multicarbon ink ribbon cassette either for high print quality or for longer print duration.

Abstract: An improved drive mechanism for an ink ribbon cassette for advancing an ink ribbon particularly well suited for use in a typewriter is provided. The drive mechanism includes a drive roller rotatably supported in the casing with a free floating pressure ring supported by a roller. The pressure ring is supported against the roller and against the drive roller so that there is an increase in pressure with an increase in the tension of the ribbon.

Abstract: An ink ribbon cassette for winding an ink ribbon from a feed spool to a winding spool is provided. The cassette includes a base with a guide path for receiving a guide projection formed on a support member having a feed spool sleeve. A drive roller and controlling roller are rotatably mounted on the cassette base. A winding spool is rotatably mounted on the feed spool sleeve and biased towards the drive roller, and a feed spool is rotatably mounted on the feed spool sleeve and biased towards the controlling roller. The spool sleeves are positioned so that when the guide projection of the support moves within the guide path the winding spool operatively engages the drive roller and the support member pivots about the guide projection so that when the ribbon is wound from the feed spool to the winding spool, the feed spool maintains engagement with the controlling roller.

Abstract: A lift-off adhesively erasable typewriter ribbon contains, in a pigmentatious layer on the substrate strip, in addition to the pigment and a resin binder, a halogenated hydrocarbon modifier containing at least 14 carbon atoms serving to embrittle the resin binder and facilitate transfer of the layer from the ribbon to the paper during the writing process and to allow clean and adhesive removal of print if a correction is required.

Abstract: A print wheel assembly for a word processing machine utilizing a daisy wheel-type printer as a type-carrying disk in which the typefaces are mounted upon flexible members generally extending radially from a hub by which the wheel is mounted in the machine. According to the invention, a pigment carrier overlies the typefaces and can be of disk configuration and is so mounted on the wheel as to shift relative to the typefaces, whereby successive impacts are offset from one another for each typeface. The pigment carrier can be a bibulous or capillary fabric drawing ink from a reservoir dimensioned to supply sufficient ink to feed the transfer layer for the duration of the useful life of the wheel.

Abstract: The invention relates to a cassette for use in connection with a device for printing characters on a surface from the stroke impact of a dye impregnated ribbon such as a typewriter, and features a housing defining an aperture for ventilating a chamber defined therein, re-impregnating means disposed in the chamber and operable for re-impregnating the ribbon dye, and locking means removably engaged with the aperture and operable to activate the re-impregnating means during disengagement of the locking means with the aperture.

Abstract: A cassette, for use in connection with a device for printing characters on a surface from the stroke impact of an endless dye impregnated ribbon such as a typewriter, the device defining a stroke region, features a housing defining two chambers, one of the chambers providing a storage region, the housing having a passageway for the ribbon, the passageway interconnecting with the storage region and being adapted to communicate with the stroke region, the ribbon being adapted to move between the stroke area and the storage region, re-impregnating means disposed in the other chamber and operable for re-impregnating the ribbon with dye, and transport means disposed substantially between the chambers and the passageway and operable for transporting the ribbon and for maintaining the ribbon substantially stretched in the stroke region.