34 one end of the hinge is connected to second clamping means 70 and the opposite end of the hinge is connected to support portion 66 of the first clamping means by a pair of flat head screws 90 which extend through suitable holes formed through the opposite end of the hinge and are threaded into threaded brass inserts 92 molded into support portion 66 the second clamping means 70 is shown in solid lines in the clamping position in fig7 and hinge 82 permits this clamping means to be pivoted or swung into the phantom line position shown in this figure when clamping means 70 is in the vertical position as shown in fig7 and in the middle clamping mechanism in fig2 a sheet of fabric may be placed on the first clamping means defined by portions 24 28 44 48 62 64 and 66 as well as the upper surface of body means 10 above flanges 20 and 40 when so supported clamping means 70 may be swung downwardly to clamp a piece of fabric 100 in position between the inner surface of the first clamping means and the outer surface of the second clamping means as shown in the.