Abstract: A double flat detection and correction system includes a feeder for detecting a double flat from multiple flats. The system also includes (i) a stacking unit that stacks one or more flats, and (ii) a de-stacking unit that de-stacks a flat from the one or more flats. The de-stacking unit includes (a) a first sensor unit that detects (i) an edge of the first flat, and (ii) an edge of the second flat when the flat is the double flat, (b) a second sensor unit that detects a presence of the first flat, and (c) a first anti-doubler unit that is activated when (i) the first sensor unit detects the edge of the second flat, and (ii) the second sensor unit detects the presence of the first flat. The system further includes a second anti-doubler unit that is activated when the presence of the first flat is detected.

Abstract: An exercise device or exercise device attachment with an energy absorbing component configured to change shape so as to absorb energy in response to a compressive force by the user. Said energy absorption component returns substantially to its first shape in response to the removal of the compressive force. The energy-absorbing apparatus is configured to reduce a reaction force exerted on the user of said exercise equipment.