Sheet product dispenser
A sheet product dispenser is provided for sheet product from a roller. The sheet product dispenser includes a first roll of sheet product, called a stub roll, a main roll of sheet product, and a dispensing arrangement. A sensor is provided for detecting when sheet product on a stub roll is depleted. The sensor generates a signal in response to the depletion of the stub roll and a controller activates an electromechanical actuator. The actuator acts to operate a transfer bar that moves an end portion of the main roll sheet product adjacent a roller assembly that engages the main roller sheet product.
1. A method of dispensing sheet product, said method comprising:
emitting a light to sense a presence of a sheet product entering a feed roller assembly;
generating a signal if no sheet product is sensed entering the feed roller assembly;
activating an electromechanical actuator in response to said signal; and
moving a secondary sheet product first end from a first position to a second position when said electromechanical actuator is activated.
2. The method of claim 1 , wherein sheet product is not sensed if said emitted light is received by a receiver.
3. The method of claim 1 , wherein emitting the light comprises emitting the light from a light emitting diode or an infrared light emitter.
4. The method of claim 1 , wherein moving said secondary sheet product first end from the first position to the second position comprises operating a motor for a predetermined amount of time when said electromechanical actuator is activated.
5. The method of claim 1 , wherein emitting the light comprises emitting the light in the direction of said feed roller assembly.
6. The method of claim 1 , further comprising:
determining when a cover has been closed,
wherein emitting the light occurs after the cover is closed, and
wherein moving the secondary sheet product first end from the first position to the second position comprises activating a transfer bar.
7. The method of claim 6 , further comprising:
activating a drive motor after the secondary sheet product first end is moved to the second position; and
positioning the secondary sheet product for dispensing.
8. The method of claim 7 , further comprising:
determining said secondary sheet product is not available for dispensing after activating said drive motor; and,
repeating said steps of activating said transfer bar and activating said drive motor.
9. The method of claim 8 , further comprising:
repeating said steps of determining said secondary sheet product is not available for dispensing, activating said transfer bar, and activating said drive motor a predetermined number of times.
10. The method of claim 9 , wherein said predetermined number of times is three.
11. The method of claim 1 , wherein:
the light is emitted to sense the presence of a sheet product entering a nip of the feed roller assembly, and
the signal is generated if no sheet product is sensed entering the nip of the feed roller assembly.
12. A method of dispensing sheet product, comprising:
emitting a light to sense a presence of a first sheet product entering a feed roller assembly;
generating a signal if said first sheet product is not sensed;
activating an electromechanical actuator in response to said signal;
moving a second sheet product first end from a first position to a second position when said electromechanical actuator is activated;
activating a drive motor after the second sheet product first end is moved to the second position;
determining said second sheet product is not available for dispensing after activating said drive motor;
repeating said steps of moving said sheet product first end from said first position to said second position and activating said drive motor; and
positioning the second sheet product for dispensing.
13. The method of claim 12 , wherein moving the second sheet product first end from said first position to said second position comprises activating a transfer bar.
14. The method of claim 12 , further comprising determining when a cover has been closed, wherein emitting the light occurs after the cover is closed.
15. The method of claim 12 , further comprising repeating said steps of determining said second sheet product is not available for dispensing, activating said transfer bar, and activating said drive motor a predetermined number of times.
16. The method of claim 15 , wherein said predetermined number of times is three.