Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Reexamination Certificate
2007-05-07
2010-10-26
Koch, III, George R (Department: 1791)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
C156S073100, C156S073400, C156S580100
Reexamination Certificate
active
07819158
ABSTRACT:
An ultrasonic welding system includes an ultrasonic welding stack mounted for linear movement and for applying a controlled force, speed, or a combination of force and speed to a first workpiece to press the first workpiece against a second workpiece to which the first workpiece is to be joined, and an electrically powered linear actuator coupled to the ultrasonic welding stack for moving the stack while applying a controlled force, speed, or a combination of force and speed to said stack, the actuator including an electrical servo motor producing rotational mechanical motion and an integrated converter for converting the rotational motion into linear motion. In one specific implementation, a controller is coupled to the linear actuator for controlling the force applied by said actuator to the ultrasonic welding stack, and a sensor is coupled to the servo motor for producing a signal related to the torque produced by the servo motor and supplying that signal to the controller. In a second specific implementation, a load cell is used for force feedback to the motion controller with a linear or rotary position feedback device used to provide position and velocity feedback to the motion controller. The controller controls the electrical power delivered to the servo motor so as to control the torque and speed outputs of the motor.
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PCT International Search Report for International Application No. PCT/US2007/011011 dated Feb. 28, 2008.
Golko Paul
Jurkowski William E.
Klinstein Leo
Dukane Corporation
Koch, III George R
Nixon & Peabody LLP
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