Ink-ribbon reversing device

Details Ink-ribbon reversing device Ink-ribbon reversing device

1977-06-23

1980-01-08

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-reversing mechanism

4002195, B41J 3344

Patent

active

041825764

ABSTRACT:
An ink-ribbon reversing device for use in a printing machine having an ink-ribbon winding mechanism is provided. The device includes two ink-ribbon spools and associated spool gears mounted on separate spool shafts spaced apart from each other. A drive shaft is positioned between the spool gears with an arm rotatably mounted thereon. A first gear is fixed to the drive shaft. A second gear rotatably mounted on one end of the arm is in engagement with the first gear. One of two actuatable change-over levers abuts the free end of the arm to maintain engagement between the second gear and one spool gear to drive the associated ribbon spool. At the completion of ribbon winding, the change-over lever is displaced, releasing the arm which rotates about the drive shaft to abut the other change-over lever and engage the second gear with the other spool gear to drive the associated ribbon spool. The invention is characterized in that the arm is rotated in one direction by said first gear to provide for the change-over in engagement of the spool gears.

REFERENCES:
patent: 584497 (1897-06-01), Eckels
patent: 3026987 (1962-03-01), Gather
patent: 3670981 (1972-06-01), Cavella
patent: 3854670 (1974-12-01), Bertolazzi
patent: 3948382 (1976-04-01), Nesbitt et al.
patent: 3954167 (1976-05-01), Kranz et al.

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