Abstract: A power loom for the manufacture of woven fabrics, in particular woven wire fabrics and felts for use in papermaking machines, is provided with a computerized pattern recognition system for monitoring the warp, the fabric, the edge of the fabric, the density of the weft, and so on. The device includes a video camera and computerized image processing means. By analyzing a picture taken near an edge of the fabric, digital information concerning the position of the edge of the fabric, the weft density, and so on, can be obtained. The digital information is adapted to be used in an open or closed control system for positioning the edge of the fabric in correct position, after an interruption of fabric through the loom, before a restart of the fabric feed. Digital information concerning the actual weft density can be utilized as the actual value in a weft density control system using the driving means of the warp beam of the loom as the executive members via a tensile stress control applied to the fabric.

Abstract: A cam-following roller is brought by a low-power electromagnet into contact with a cam carried by a driving pulley. A second roller which is coaxial with the follower roller exerts a thrust on a disk when the follower roller travels along the profile of the cam, thus disengaging the pulley from the driving shaft of the cloth takeup regulator.

Abstract: The present invention relates to draw lever assemblies mounted on the dobbies and other mechanisms for forming the shed on weaving machines. Between the levers born by the fixed pin there are interposed axial stops, each of which includes two discs profiled to form between them a raceway for balls. The assembly is subjected to a constant axial pressure, furnished for example by an elastically deformable washer.

Abstract: An apparatus for controlling a let-off motion in a loom having a let-off motion motor includes a tension detector for detecting a warp tension to produce a tension correction signal, a control unit responsive to the tension correction signal for producing a speed signal, a driving amplifier for controlling the let-off motion motor in response to the speed signal, a warp coil diameter detector for issuing a warp coil diameter correction signal inversely proportional to the diameter of a warp coil on a beam to the driving amplifier, and a normal-reverse rotation control unit responsive to the warp coil diameter correction signal for selectively applying prescribed normal- and reverse-rotation signals dependent on a rotation command to the driving amplifier. With this arrangement, the motor is rotated at a desired constant speed for feeding out or rewinding the warp yarn for a desired length irrespectively of the warp coil diameter.