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US 6,293,539 B1Granted
Rotating or pivoting apparatus and medium feeding apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsKunio Fukatsu, Masao Obama, Katsumi Inoue
Life of this patent
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Abstract
A medium feeding apparatus comprises a driving motor for moving a backup plate to press a medium against a pickup roller, piezoelectric elements for sensing slippage between the pickup roller and the medium which occurs while the roller rotates, and a controller for driving the driving motor to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium.
Claims11
A rotating or pivoting apparatus comprising:
- an inner ring rotating or pivoting when power is transmitted thereto from a driving source;
- an outer ring located outside the inner ring and rotating or pivoting when power is transmitted thereto from the inner ring, thereby transmitting power to a to-be-treated medium;
- and
- sensing means provided between the inner ring and the outer ring for sensing vibration of the outer ring to thereby sense slippage between the outer ring and the to-be-treated medium.
1 more element
A medium feeding apparatus comprising:
- mounting means for mounting thereon a medium in a stacked manner;
- a pickup roller for picking up each of the medium while it rotates or pivots;
- a driving source for driving the pickup roller;
- and
- driving means for moving the mounting means to press the medium against the pickup roller;
- sensing means provided in the pickup roller for sensing a change in fine acceleration of the pickup roller to thereby sense slippage between the pickup roller and the medium;
- and
- control means for executing control so as to drive the driving means to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium.
5 more elements
A medium feeding apparatus comprising:
- mounting means for mounting thereon a medium in a stacked manner;
- a pickup roller for picking up each of the medium while it rotates or pivots;
- a driving source for driving the pickup roller;
- and
- driving means for moving the mounting means to press the medium against the pickup roller;
- sensing means provided in the pickup roller for sensing a change in fine acceleration of the pickup roller to thereby sense slippage between the pickup roller and the medium;
- and
- control means for executing control so as to drive the driving means to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium,
- wherein the pickup roller includes:
- an inner ring rotating or pivoting when power is transmitted thereto from the driving source;
- and
- an outer ring located outside the inner ring and rotating or pivoting when power is transmitted thereto from the inner ring, thereby transmitting power to the medium, and
- the sensing means is provided between the inner ring and the outer ring for sensing a change in fine acceleration of the outer ring to thereby sense slippage between the outer ring and the medium.
10 more elements
Dependencies are inferred from the claim text.