| 摘要 |
A document feed system comprises a feed wheel (10) mounted on a first rotatable shaft (13), and a retard wheel (11) mounted on a second rotatable shaft (14). The first shaft is driven by a motor and the second shaft is mounted in a bearing fixed in a pivoting arm. A first pulley (17) is fixed on the first shaft and a second pulley (19) is coupled to the second shaft through a slipping clutch (18). A belt (20) passes round the first and second pulleys and also round an idler pulley (21) which is rotatable on a spring loaded shaft (22). The arrangement is such that the belt (20) pulls the first and second shafts towards each other so that a document may be gripped between the feed and retard wheels. If a single document is located in the flip between the feed and retard wheels it will be driven in the direction of the arrow (24). However, if two documents are located side by side in the nip, one document will be driven in the direction of the arrow (24) while the other is retarded relative to that document. <IMAGE> |
