gear drive system comprising opposing ribbon feed gears which provide increased ribbon pulling force and which is sold as a component of ink ribbon catridges for use in a variety of office equipment such as typewriters, calculators, electronic printing calculators, cash registers, computers, word processors, and thermal print apparatus

'apparatus':49 'calcul':37,40 'cash':41 'catridg':25 'compon':21 'compris':4 'comput':43 'drive':2 'electron':38 'equip':33 'feed':7 'forc':14 'gear':1,8 'increas':11 'ink':23 'offic':32 'oppos':5 'print':39,48 'processor':45 'provid':10 'pull':13 'regist':42 'ribbon':6,12,24 'sold':18 'system':3 'thermal':47 'typewrit':36 'use':27 'varieti':30 'word':44

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