Abstract: If a top cover 5 has been opened, a link lever 34 is moved backward in conjunction with the motion of the top cover 5, so that a release lever 51 is rotated clockwise as seen from the left side about a level shaft 50. Also, a release gear 49 and a release shaft 48 are rotated about 180° counterclockwise as seen from the left side, via a lever gear 52. Accordingly, a head supporting member 37 is rotated downward, resisting an urging force of a pressing spring 36, so that a thermal head 32 is separated from a platen roller 35 and entry of a roll sheet 3A becomes possible through an insertion port 26.

Abstract: A ribbon feed mechanism for a typewriter has a linkage for incrementally feeding a ribbon, a power roll rotated by a motor and a control member actuated by a printing mechanism for connecting the power roll to the linkage to incrementally feed the ribbon. The control member is also actuated by a carriage shift mechanism when shifting a carriage from an upper case position to a lower case position for connecting the power roll to the linkage to incrementally feed the ribbon.