Patent ID: 7712190

Claim:
A clip for clamping sheets of paper, plastic, metal, and other materials at the sheet corners or sides, the clip comprising: two limbs ( 1 , 1 a , 1 b ); and a pre-tensioned back ( 2 ) configured to apply a force to the limbs; where the clip is configured to be U-shaped with the limbs parallel to each other in a relaxed state; each limb including a small inward fold ( 3 ) of less than 90 degrees ( 3 a ), each inward fold defining a fold line; the fold lines being parallel to each other and disposed at an acute angle ( 4 a ) with respect to the back; the clip is configured so that the sheets may be clamped between the limbs by virtue of the force applied by the pre-tensioned back; and the clip comprises metal or high-strength plastic or wood or compressed cellulose.