Patent ID: 7490633

Claim:
A shed-forming mechanism on a Jacquard type loom, the mechanism comprising: moving hooks each moved by a knife between a top dead-center position, in or near which each hook can be held stationary by a selector device, and a bottom dead-center position, each moving hook having a body provided with a nose for bearing against the corresponding knife and a flexible blade secured to the body so that the blade is capable of moving relative to the body and capable of interacting with a retaining lever of the selector device, the retaining lever having a first side for engaging a spring and an opposite second side forming a ramp over which a portion of the blade slides when the hook is moved in a vicinity of the top dead-center position, wherein the ramp is provided with corrugations and shaped such that a component (F A +F B +F C ) parallel to a travel direction (X-X′) of the moving hook of a resultant of forces (R A , R B , R C ) acting on the blade when the blade contacts the ramp in the vicinity of the top dead-center position of the hook is directed downwardly.