Rotary endorser for document processing employing a shape memory alloy actuator
An actuation device for an endorsing roller in an automated document processing system is disclosed. The actuation device includes a shape memory alloy actuator interconnected with an endorsing roller, the shape memory alloy actuator interconnected with the endorsing roller and configured to be actuated to move the endorsing roller from a retracted position to a printing position.
1. An apparatus, comprising:
an automated document processing system including an endorsing roller and a base plate, wherein the endorsing roller is arranged upon an upper surface of the base plate; and
an actuation device arranged upon a lower surface of the base plate and in communication with the endorsing roller that is arranged upon the upper surface of the base plate, wherein the actuation device includes:
a bracket that is fixed to the lower surface of the base plate,
a lever arm including a first end and a second end that is movably-arranged upon the lower surface of the base plate, wherein the lever arm is connected to the endorsing roller,
a spring connected to the first end of the lever arm, and
a shape memory alloy actuator including a first end and a second end, wherein the first end of the shape memory actuator is connected to the bracket, wherein the second end of the shape memory alloy actuator is connected to the second end of the lever arm.
2. The apparatus of claim 1 , wherein the shape memory alloy actuator includes a shape memory alloy wire.
3. The apparatus of claim 1 , further comprising
a circuit connected to the shape memory alloy actuator and configured to actuate the shape memory alloy wire in response to an input.
4. The apparatus of claim 3 , wherein the input comprises
a four bit digital signal.
5. The apparatus of claim 3 , wherein the circuit is connected across the shape memory alloy actuator and induces a current in the shape memory alloy wire in response to the input.
6. The apparatus of claim 3 , wherein the input provides an interface to a computing system external to the automated document processing system.
7. The apparatus of claim 1 , further comprising
a guard arranged upon the upper surface of the base plate and arranged around a portion of the circumference of the endorsing roller.
8. A method, comprising the steps of:
connecting a shape memory alloy wire to an endorsing roller of an automated document processing system;
arranging the endorsing roller in a default, retracted position;
changing an orientation of the endorsing roller from the default, retracted position to an engaged, printing position to permit endorsement of a document that is interfaced with the automated document processing system by:
contracting a length of a shape memory alloy wire in response to an application of a current across the shape memory alloy wire.
9. The method of claim 8 further comprising the step of:
changing the orientation of the endorsing roller from the engaged, printing position back to the default, retracted position by:
expanding the length of the shape memory alloy wire in response to a removal of the current across the shape memory alloy wire.
10. The method of claim 8 further comprising the step of:
receiving an input at a circuit connected across the shape memory alloy wire, wherein the input is received from a computing system interfaced with the automated document processing system.
11. A financial network, comprising:
a computing system; and
an automated document processing system interfaced with the computing system, wherein the automated document processing system includes:
an endorsing roller and a base plate, wherein the endorsing roller is arranged upon an upper surface of the base plate, and
an actuation device arranged upon a lower surface of the base plate and in communication with the endorsing roller that is arranged upon the upper surface of the base plate, wherein the actuation device includes:
a bracket that is fixed to the lower surface of the base plate,
a lever arm including a first end and a second end that is movably-arranged upon the lower surface of the base plate, wherein the lever arm is connected to the endorsing roller,
a spring connected to the first end of the lever arm, and
a shape memory alloy actuator including a first end and a second end,
wherein the first end of the shape memory actuator is connected to the bracket,
wherein the second end of the shape memory alloy actuator is connected to the second end of the lever arm.