The HIROSHIMA Crimp Tester is designed to determine the crimp of yarns taken out of fabrics . One end of the yarn is held in a pivoted loading grip on which the desired tension load is applied by means of a sliding weight acting on a lever arm, while the other end is held in a movable grip which is mounted on a screw and can move along the direction of the yarn, stretching it in the process . The distance moved through by this grip gives the extension of the yarn , and can be measured on a scale fixed by the side of the grip assembly .
The loading grip is pivoted on jewel bearing and mounted on a sliding platform which can be moved towards or away from the moving grip to enable different marked lengths of yarn to be tested . The test length is indicated on a scale fixed on the base of the apparatus against a pointer fixed to the sliding platform .
The yarns is held in between the two grips and pulled by moving the movable grip away from the loading grip . The tension under which the crimp is to be determined is set on the pendulum by moving the sliding weight and is indicated on a load scale . When the yarn is under the specified tension , the pendulum lifts off its support , thus breaking a contact and turning off a low voltage indicator light . The elongation of the yarn when the light just goes off is noted , from which the value of percentage crimp can be calculated .
The apparatus is finished in grey hammer tone stoving painting and bright chrome plating to give it a corrosion resistant finish .