Olympia Werke Ag

Bernd Tappehorn

Alfred Keiter

Wolfgang Mudder

A feed mechanism for advancing an ink ribbon, supported in a cartridge which is inserted into a typing machine, in feeding steps whose length is determined in dependence upon the type of the ribbon, the mechanism including: a feed roller rotatably mounted in the cartridge for engaging the ribbon to advance it in feeding steps, the roller being selected from a plurality of rollers having respectively different diameters on the basis of the type of the ribbon; a driving device mounted in the machine and including a pressure roller movable into a position against the feed roller when the cartridge is inserted in the machine; and a mechanism for rotating the feed roller in angular steps for advancing the ribbon in corresponding feeding steps, which mechanism is settable for causing each angular step of rotation of the feed roller to have a selected one of at least two different magnitudes, each magnitude corresponding to a respectively different ribbon feeding step length, and is coupled to the pressure roller in a manner to be set to produce angular rotation steps of a selected magnitude in dependence on the position of the pressure roller when it is in its position against the feed roller, whereby the magnitude of each ribbon feeding step is automatically determined as a function of the diameter of the selected feed roller.

Adjustable ribbon feed rates dependent upon ribbon type for ink ribbon

In a ribbon cartridge for an office writing machine, which cartridge includes a housing having a base plate, a supply reel and a take-up reel mounted in the housing, a carbon ribbon wound around the reels and mounted to be conducted from the supply reel to the take-up reel while traveling over a guidance path having a first portion located outside of the housing and a second portion located inside the housing and extending between the first portion and the take-up reel, the housing being provided with an entrance opening located between the first and second portions of the guidance path for the passage of the ribbon into the housing, and the cartridge further including guide elements located for guiding the ribbon along the second path portion and a transport roller located along the second path portion for transporting the ribbon to the take up reel, the base plate is provided with recesses for damping noise generated during operation of the machine, and the cartridge is constructed for preventing particles which are detached from the ribbon over the second portion of the guidance path from falling out of the housing.

Growing community of inventors

Wilhelmshaven, Germany

Bernd Tappehorn