This is a piece of test equipment called the slide angle tester.  It is designed to measure the angle of skid of corrugated.  Angle of skid is the angle at which point stacked boxed will tend to slip and fall when being handled.

This is a picture of the slide angle tester in the raised position.

This an Autocad drawing  of the slide angle tester.

This is a drawing of one of the tooling fixtures that I had to create to manufacture the tester.

This is a drawing on the slip clutch hub.  I created a custom slip clutch for the tester to reduce parts and cost and simplify its manufacture.