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US 2001/0019192 A1Published application
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 pressing down the lift plate against the first elastic device so that the paper on the lift plate is moved away from the pick-up roller;
- and
- a separator capable of contacting the pick-up roller, wherein when the separator contacts the pick-up roller and the pick-up roller moves two sheets of the paper from the lift plate, the pick-up roller will continue to move the upper sheet and the separator will stop the lower sheet from moving;
- wherein when the depressive device presses down on the lift plate, the lift plate will press down the separator and cause the separator to move away from the pick up roller, and when the depressive device releases the lift plate, the first elastic device will lift up the lift plate so that the uppermost sheet of the paper contacts the pick-up roller, and the separator contacts 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 the 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 pressing down on the front end of the lift plate against the first elastic device so that the paper on the lift plate is moved away from the pick-up roller;
- 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 depressive device releases the front end of the lift plate, the paper blocking mechanism will be pushed away so that the paper can move forward and leave the lift plate.
4 more elements
Dependencies are inferred from the claim text.