Typewriter cartridge and feed mechanism therefor

A cartridge for a typewriter comprising:

• a case, means to hold a supply of print ribbon in said case, means defining a path for traversal of said print ribbon in said case externally of said case, a spool in said case having a print ribbon advancing surface thereon, an opening along one peripheral surface of said case for exposing said print ribbon advancing surface externally of said case, biasing means for biasing said spool and its print ribbon advancing surface towards said opening, hinge means comprising a pair of ears projecting from said case from opposite sides of said opening for effecting engagement of said print ribbon advancing surface with a print ribbon advancing means on the typewriter, and cartridge retention means on said case for engagement on said typewriter for holding said cartridge in a predetermined position relative to said print ribbon advancing means on said typewriter.

A cartridge for a typewriter comprising:

• a case, means to hold a supply of print ribbon in said case and means defining a path for traversal of said print ribbon externally of said case so as to be exposed for a printing operation, said case having a laterally extending axis of rotation, a trunnion projecting from said case along said axis, and a pair of ears projecting from said case on opposite sides of said axis and for locking engagement in said typewriter in conjunction with said trunnion for rotation of said cartridge about said axis.

A cartridge for a typewriter, said cartridge having a pair of separate chambers in superimposed relation, first and second pairs of spaced apart guide means associated respectively with said chambers in superimposed relation;

• separate supply and take-up spools in each of said chambers, said supply spools having a fixed axis of rotation and said take-up spools having an axis of rotation along translatory paths, and openings in said cartridge chambers aligned in said paths;
• and biasing means to bias each of said take-up spools in their respective paths toward said openings, said biasing means comprising a rod having a first depending portion, acting as an axis for said take-up spool and spring means connected to said rod to effect said bias;
• and a second depending portion on each of said rods spaced a predetermined distance from its associated supply spool so that said supply spool limits continued inward movement of said take-up spool by engaging said second depending portion when the take-up spool is pressed inwardly from said opening and along said path a distance greater than said predetermined distance.

A cartridge for a typewriter comprising:

• a case, means to hold a supply of print ribbon in said case, means defining a path in said case for traversal of said print ribbon externally of said case, a spool in said case having a print ribbon advancing surface thereon, means defining an opening along one peripheral surface of said case for exposing said print ribbon advancing surface externally of said case, spool biasing means comprising a rod mounted for reciprocation with respect to said case, said rod having a depending portion acting as an axis for said spool, means defining a slot in said case, and means on said rod projecting into said slot to define a translatory path for movement of said spool, and spring means for urging said spool and its print ribbon advancing surface towards said opening, means on said case for effecting engagement of said print ribbon advancing surface with a print ribbon advancing means on the typewriter, and cartridge retention means on said case for engagement on said typewriter for holding said cartridge in a predetermined position relative to said print ribbon advancing means on said typewriter.

A cartridge for a typewriter for holding a supply of ribbon, said cartridge including a case, spool means mounting a supply of ribbon interiorly of said case, said spool means mounted for rotation therein;

• means defining a path for traversal of said ribbon externally of said case, a ribbon take-up spool in said case having a ribbon advancing surface thereon;
• means defining an opening along one peripheral surface of said case for exposing said ribbon media advancing surface externally of said case;
• a rod having at least one depending portion extending through said take-up spool and acting as the axis of rotation therefor, means defining a slot in said case for receiving said depending portion of said rod to thereby define a confined path of travel for said take-up spool, and spring means mounted interiorly of said case, intermediate said take-up spool and said case, for biasing said take-up spool towards said opening.