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US 6,485,015 B2Granted
Automatic paper feeding system
AssigneeBenq Corporation
InventorsWei-Feng Yen, Kun-Yee Yang
Life of this patent
Estimating the term…
Abstract
A paper feeding mechanism with a separator and paper blocking mechanisms. When feeding paper, a lift plate carrying paper is moved up to allow a pick-up roller and the separator to move one sheet from the lift plate. After feeding paper, the lift plate is lowered away from the pick-up roller, and the paper blocking mechanism pushes excess paper back to the lift plate.
Claims17
A paper feeding system comprising:
- a lift plate for holding paper;
- a first elastic device for lifting up the lift plate;
- a pick-up roller arranged above the lift plate, wherein when the first elastic device lifts up the lift plate, the pick-up roller frictionally engages an uppermost sheet of the paper;
- a depressive device for selectively pressing down the lift plate against the first elastic device;
- and
- a paper blocking mechanism installed ahead of a front end of the lift plate;
- wherein when the lift plate is pressed down, the paper blocking mechanism moves within the circumferential plane of the pick-up roller, and when the lift plate is lifted up, the lift plate pushes the paper blocking mechanism away from the pick-up roller.
4 more elements
A paper feeding system comprising:
- a lift plate for holding paper;
- a first elastic device for lifting up a front end of he lift plate;
- a pick-up roller arranged above the front end of the lift plate, wherein when the first elastic device lifts up the front end of the lift plate, the pick-up roller frictionally engages an uppermost sheet of the paper;
- a depressive device for selectively pressing down on the front end of the lift plate against the first elastic device;
- and
- a paper blocking mechanism installed ahead of the front end of the lift plate and capable of blocking the paper from moving forward and leaving the lift plate;
- wherein when the depressive device presses down on the front end of the lift plate, the lift plate will activate the paper blocking mechanism to push the paper backwards to the lift plate, and when the lift plate is lifted up, the lift plate pushes the paper blocking mechanism away from the circumferential plane of the pick-up roller.
4 more elements
Dependencies are inferred from the claim text.