comprising a single pawl or integral double-tooth pawl selectively engageable with two ratchets, one for each spool

Full Title

Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material > Ribbon-feed devices or mechanisms > with arrangements for reversing the feed direction > automatically > and characterised by its application to mechanism in which two spools are driven by pawl-and-rachet mechanism > comprising a single pawl or integral double-tooth pawl selectively engageable with two ratchets, one for each spool