SHEET TRANSPORT WITH ONE-WAY CLUTCH TO DISENGAGE SEPARATION SHAFT
First Claim
1. A sheet transport device comprising:
- a pickup roller to insert a sheet of media into a sheet path;
a pair of separation rollers including a first separation roller and a second separation roller and forming a nip to advance the sheet along the sheet path, wherein;
a first separation shaft, driven by a motor, on which the first separation roller is disposed rotates in a first direction as the sheet is advanced along the sheet path;
a second separation shaft, engaged with the motor via a one-way clutch disposed on the second separation shaft, on which the second separation roller is disposed, rotates in the first direction as the sheet is advanced along the sheet path; and
the second separation roller is driven by the second separation shaft in a second direction as the sheet is advanced along the sheet path in response to a torque limiter coupling the second separation shaft to the second separation roller, such that the second separation shaft rotates in the first direction and the second separation roller is driven in the second direction,wherein the one-way clutch disengages the second separation shaft from the motor when the motor is operating in a reverse mode.
1 Assignment
0 Petitions
Accused Products
Abstract
In one example in accordance with the present disclosure, a sheet transport device is described. The sheet transport device includes a pickup roller to insert a sheet into a sheet path. A pair of separation rollers of the sheet transportation device form a nip that advances the sheet along the sheet path. A first separation shaft on which a first separation roller is disposed rotates in a first direction as the sheet is advanced and a second separation shaft on which a second separation roller is disposed also rotates in the first direction as the sheet is advanced. The second separation roller is driven in a second direction via a torque limiter. A motor rotates the shafts. A one-way clutch is disposed on the second separation shaft to disengage the second separation shaft from the motor when the motor is operating in a reverse mode.
3 Citations
15 Claims
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1. A sheet transport device comprising:
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a pickup roller to insert a sheet of media into a sheet path; a pair of separation rollers including a first separation roller and a second separation roller and forming a nip to advance the sheet along the sheet path, wherein; a first separation shaft, driven by a motor, on which the first separation roller is disposed rotates in a first direction as the sheet is advanced along the sheet path; a second separation shaft, engaged with the motor via a one-way clutch disposed on the second separation shaft, on which the second separation roller is disposed, rotates in the first direction as the sheet is advanced along the sheet path; and the second separation roller is driven by the second separation shaft in a second direction as the sheet is advanced along the sheet path in response to a torque limiter coupling the second separation shaft to the second separation roller, such that the second separation shaft rotates in the first direction and the second separation roller is driven in the second direction, wherein the one-way clutch disengages the second separation shaft from the motor when the motor is operating in a reverse mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A sheet transport system comprising:
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a sheet transport device comprising; a pickup roller to insert a sheet from a sheet tray into a sheet path; a pair of separation rollers including a first separation roller and a second separation roller and forming a nip to advance the sheet along the sheet path; a torque limiter disposed on a second separation shaft; and a one-way clutch disposed on the second separation shaft; and a motor; and a transport path roller to advance a sheet not originating from the sheet tray along the sheet path; wherein the motor is to; rotate in a forward direction to drive the pickup roller, the first separation roller and the second separation roller; and rotate in a reverse direction to drive the first separation roller and the transport path roller. - View Dependent Claims (9, 10)
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11. A method for transporting a sheet, comprising:
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driving a motor in a forward mode to rotate a pickup roller, a first separation shaft, and a second separation shaft in a first direction while a transport path shaft is inactive; driving a second separation roller disposed on the second separation shaft in a second direction in response to a torque limiter coupling the second separation shaft to the second separation roller; and driving the motor in a reverse mode to rotate the first separation shaft in a second direction and to activate the transport path shaft while the pickup roller and second separation shaft are disengaged. - View Dependent Claims (12, 13, 14, 15)
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Specification