Patent ID: 7735819
Filing Date: 2010-06-15
Classification: B65H

Abstract:
1. An automatic paper feed apparatus, comprising: a paper separation device consisting of a compound gear, the compound gear being composed of a first paper separation gear and a second paper separation gear respectively having a projection and a protrusion formed thereon, the first and second paper separation gears being rotatably and mutually drivably coupled with each other by the engagement between the projection and the protrusion; a paper pickup roller that is driven to rotate by the second paper separation gear of the paper separation device through a paper pickup gear mechanism, the paper pickup gear mechanism being disposed between the paper pickup roller and the second paper separation gear and being directly meshed with the second paper separation gear; a paper feed roller that is driven to rotate by the first paper separation gear of the paper separation device through a paper feed gear mechanism, the paper feed gear mechanism consisting of a paper feed roller gear mounted on a same shaft as the paper feed roller and a paper feed compound gear offsetly disposed between and directly meshed with the paper feed roller gear and the first paper separation gear; and a power source providing power to drive the first paper separation gear of the paper separation device to rotate; wherein, the paper feed roller has a linear velocity higher than a linear velocity of the paper pickup roller and a predetermined clearance is thus formed between the projection and protrusion of the respective first and second paper separation gears of the paper separation device.