US Patent 7201064 Panel bending machine

A panel testing device, and a method of its use, for flexing and measuring mechanical properties of a panel are provided comprising a panel bending assembly operable to engage a panel and impart a bending force on the engaged panel, and a linear actuator having an output shaft coupled to the panel bending assembly, wherein the output shaft is operable to be movable relative to the panel bending assembly continuously at a constant rate of linear motion regardless of the torque force resisting such motion at the panel testing assembly.