Chain drive type carriage reciprocating device for a copying machine

摘要

A document table reciprocating device for a copying machine comprising a pair of sprockets which are disposed near to end of the path of a document table, a chain engaged around the pair of sprockets, a roller engaged with the chain, and a plate having an opening in such a shape for enabling the roller to stay in the opening when the roller is positioned adjacent a turning point around the sprocket.