(57) in a daisy wheel (17) or rotary print wheel typewriter, a single motor (47) (stepper
motor) is employed to accomplish both ribbon lift and feed for typewriter ribbon (16)
and correction ribbon (30) loaded in a cartridge assembly (15). A single motor drive
moves a cartridge assembly support about an axis (41) to present either the typewriter
ribbon or the correction ribbon to the print point at the print line. In the first
portion of the arc that the cartridge assembly moves up for normal typing with the
typewriter ribbon, only the feed ratched (65) for the typewriter ribbon is engaged
into drive pawl (81). Alternatively, when the rotation is greater, to present a correction
ribbon at the print line, the added elevation of the cartridge assembly causes the
correction ribbon ratchet (66) with drive pawl (82) together with disengagement of
the ratchet (65) from pawl (81) through camming effect due to ratchet (66), pawl (82)
and link (85). When the cartridge assembly is brought back down about axis (41), the
only pawl engaged ratchet is driven thus driving the corresponding ribbon by one feed
increment.
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