Removable cartridge for the inked ribbon for typewriters, calculating machines or other office machines

摘要

A removable cartridge for an inked ribbon for an office machine comprises a container rotatably supporting two ribbon-carrying spools. The container has a first side wall provided with a pair of slits for the passage of the inked ribbon from the one to the other of said spools. A pair of apertures in a second side wall opposite to said first side wall allows entry into said container of sensing elements of a ribbon reversal feed mechanism for sensing the amount of inked ribbon on said spools. The sensing elements cooperate with corresponding latch levers of a reversal member which, by means of a reversal spring actuates a feed element for driving the spools carrying said ribbon in one sense and the other sense respectively. A closure member of the machine is movable between a first position wherein the cartridge is held on the machine, and a second position wherein the sensing elements are withdrawn from said apertures.