MIT folding endurance tester No.2015-M

This machine counts the number of folds which a specimen under a specified tension will withstand before failure. It is used for testing money and map papers subject to repetitive folds. It is also used for evaluating deterioration of paper due to aging. With different lower clamps, it can test a wide range of thickness. The number of folds to failure of some specimens may reach several thousands to several ten thousands. This machine counts folds by an optical sensor to show the fold number on the counter. The resistance at the gears for producing reciprocating movement for folding is minimized. So the operation sound is very low.