A system for locating the center of a window covering relative to a cutting mechanism. The window covering including a head rail with a first end and a second end and a connector disposed approximately midway between the first end and the second end, the connector including an aperture. The system includes...http://www.google.fr/patents/US7104175?utm_source=gb-gplus-shareBrevet US7104175 - Blind and shade cutting center with center locating system
Blind and shade cutting center with center locating system
