Abstract: Ribbon cassettes for typewriters or office machines of similar construction are subject to differnt structural requirements and primarily they are to be easily exchangeable in a one-hand operation. Since additionally the ribbon cassettes are also designed as disposable components, many still functional individual parts are also discarded. To avoid this, ribbon cassettes are known which have exchangeable ribbon spools. It is the object of the invention to provide a reloadable ribbon cassette in which the exchange of ribbon spools (4, 5) is possible with few manipulations. The removal of the spent ribbon spools (4, 5) should here be possible without soiling the fingers.

Abstract: A reloadable ribbon cassette system for typewriters or office machines of similar construction employs a bottom housing in which an exchangeable supply spool core for the ribbon and an exchangeable take-up spool core can be rotatably mounted. To facilitate the reloading process a cover plate is placed onto the top face of the ribbon coiled on the supply spool core, the cover plate inserted into the bottom housing member along with the supply spool core and ribbon when they are loaded. The cover plate has a contact surface for helping to steady a fastening element disposed at the free end of the ribbon during reloading. The cover plate projects beyond the ribbon coil at least in the region of the contact shelf to prevent accidental removal of the first few turns of the coiled ribbon in axial direction.

Abstract: A reloadable ribbon cassette system for typewriters or office machines of similar construction employs a housing which receives an exchangeable supply spool for the ribbon and an exchangeable take-up spool core. To facilitate the reloading process, the take-up spool core is mounted in the housing on a bearing pin which extends upward from a contact surface. The take-up spool core has a bearing bore into which the bearing pin extends and a bearing surface which rests on the contact surface. The contact surface is disposed closely below a receiving bore in the take-up spool core which accommodates a fastening element attached to the end of the ribbon.

Abstract: A ribbon cassette for an office machine, composed of: a cassette housing removably mountable in the machine, the housing having an entrance opening, an exit opening, an openable cover and elements constituting deflection points; a supply spool and a take-up spool having a core, each of the spools being removably mounted in the cassette housing; a carbon ribbon initially wound in the form of a coil on the supply spool, the ribbon having a leading end at the outer surface of the coil to be received by the take-up spool core to permit the ribbon to be wound up on the take-up spool while being unwound from the supply spool; and a fastening member secured to the leading end of the ribbon for threading the ribbon around the deflection points; and wherein the core is formed for enabling the fastening member to be fixed thereto to aid winding of the ribbon on the take-up spool.