Ribbon cartridge for a typewriter

Claim 1

A typewriter ribbon cartridge for a correcting typewriter having a means for advancing a correction ribbon, comprising: (a) a housing defining first and second overlying volumes for containing a typewriter ribbon and a correction ribbon, respectively and an aperture which exposes a working length of the typewriter and correction ribbons, said first and second volumes being configured to support said typewriter and correction ribbons in overlying relationship to each other, said housing comprising: (i) a bottom wall, positioned in said housing and rigidly positioned with respect to said housing at a position to separate said first and second volumes; (ii) a first pair of sidewalls secured to said bottom wall in opposed relationship to each other, to define said first and second volumes, said second volume communicating with the outside, and said first sidewalls being positioned, configured and dimensioned to allow easy access to said second volume by a human operator, said first sidewalls being integral with said bottom wall, and said first volume being defined by the upper portion of said first sidewalls; and (iii) a cover rigidly secured to the upper edges of said first sidewall to close said first volume; (b) a typewriter ribbon contained within said first volume; (c) first guiding means for guiding said typewritten ribbon through said aperture; (d) second guiding means for guiding the correction ribbon disposed within said second volume; (e) a pair of winding posts for supporting said correction ribbon; (f) a winding mechanism, external to said second volume and for engaging said means for advancing the correction ribbon for closing at least a portion of said second volume; and (g) said winding means including two toothed discs each of which is freely and rotatably mounted on one of said posts.