A clip has a frame and a flapper. Two dry bearings are inserted into a hole formed in the flapper. Then an attaching shaft is inserted from one of the holes in the frame to the other through the dry bearings, so as to swingably attaching the flapper to the frame. DAIDAYNE DDK 01 of DAIDO METAL Corp....http://www.google.com.au/patents/US7162781?utm_source=gb-gplus-sharePatent US7162781 - Tenter device
