Apparatus and method for attaching stiff crimpable material to a tenter frame

Claim 1

In an overfeed system for supplying and attaching stiff crimpable material at its selvedges to the pin chains of a pin tentering machine that includes means for forwarding the material from a source to an overfeed means for squeezing the material at its selvedges into a wavy shape having crests and valleys and forwarding the material to the plane of the pin chains, comprising upper and lower endless toothed belts pressed together through which the material passes, the improvement comprising a rotatable cylindrical brush formed of spaced groups of bristles located adjacent said overfeed means at each selvedge of the material and above said pin chain with said bristles projecting below the points of the pins, in which said brush has a peripheral surface with crests and valleys corresponding to crests and valleys imparted to the material by the overfeed means, said crests of said brush engage the valleys of said material, and said valleys of said brush are clear of the crests of said material, and means for rotating the brush synchronously with the movement of the wavy shaped selvedge edge of the material so that the crests and valleys on the peripheral surface of the brush are maintained in alignment with the valleys and crests, respectively, on said material.