PURPOSE: To improve operating properties and functional properties by contriving simplification of constitution by removing an air apparatus, by a method wherein a receiving sheet and press ruler sheet are arranged on a surface plate, the press ruler sheet is provided with a control member performing positional setting against a spring and a releasing member releasing a set position.

CONSTITUTION: When a turning operation lever 34 is turned, a press ruler sheet 25 is set up at an open end of a regulating position and work materials W... are fed while pushing them in order backward, the work materials W... are arranged on a surface plate 8. Upon completion of placing the material, link arms 32, 37 are operated with the turning operation lever 34 and bend into a chevron shape. In this instance, since bounce of a spring 29 is applied to the press ruler sheet 25, the same is slid backward and abuts against the work materials W, the work materials W each are pressed toward a receiving ruler sheet 21... sides and set up accurately without generating gaps respectively. At the time when the work materials W are transferred to an operating position by completing hot bonding at the time of clamping, turning operation lever 34 is turned against the spring 29 and the press ruler sheet 25 is set up at a regulated position. Taking out of a processed material is performed easily under a released state of this clamping.