| 摘要 |
PCT No. PCT/EP93/03262 Sec. 371 Date Jul. 3, 1995 Sec. 102(e) Date Jul. 3, 1995 PCT Filed Nov. 22, 1993 PCT Pub. No. WO94/12420 PCT Pub. Date Jun. 9, 1994Yarn feeding device for projectile or gripper looms, having a drum (D) to store the yarn (Y), an inclined annular deflection surface (G) at the free front end of the drum (D), a circumferentially continuous and yielding conical braking surface (B) at the wider end of a hollow conical brake carrier (C), pressed in contact with the deflection surface (G). The brake carrier (C) is supported at its smaller end onto a stationary part (P) and the braking surface (B) is adjustable with respect to the deflection surface (G), according to the yarn unwinding speed, so as to compensate for any tension increase in the yarn (Y), and an annular counterdeflection surface (H) for the yarn (Y), downstream of the deflection surface (G) and coaxial to the drum (D). The inside diameter of the counterdeflection surface (H) is smaller than the outside diameter of the deflection surface (G). The annular counterdeflection surface (H) is stationary, and the braking surface (B) is adjusted exclusively by direct contact of the yarn (Y), through deformation and/or displacement of the brake carrier (C) with respect to the fixed counterdeflection surface (H).
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