Abstract: A warp-stitched multilayer papermaker's fabric has a set of bottom warp yarns, a set of bottom weft yarns, a set of top weft yarns and a set of warp stitching yarn pairs. The bottom warp yarns are interwoven with the bottom weft yarns. The stitching warp yarns interweave with both the bottom weft yarns and the top weft yarns, and are woven such that at locations where the first of the stitching warp yarns in a pair weaves in the top fabric layer, the second stitching warp yarn in the pair drops below the top fabric layer to interweave with one or more bottom weft yarns to bind the top fabric layer and the bottom fabric layer together. The first stitching warp yarn of the stitching warp yarn pair may weave on a first side of one of the bottom warp yarns while the second stitching warp yarn of each stitching yarn pair may weave on the other side of that bottom warp yarn. Each stitching yarn pair may be substantially stacked above a bottom warp yarn.

Abstract: An apparatus and method for inspecting and guiding a web utilizes a curved outer convex cloth guiding surface (A) on arcuate sections such as extrusions provided respectively at the top and bottom of the viewing area for guiding cloth and for forming a housing for the light box wherein an inner housing surface (B) is provided opposite the cloth guiding surface (A) on each extrusion. Depending receiving members (C) are provided at each respective end of the arcuate extrusions for serving as a receptacle for guiding and positioning a plexiglass viewing member and back sheet metal wall for forming a light box. A force applying member (D) is provided for controlling sag or bow in an extrusion. Apparatus and method is illustrated including diverging grooves for spreading the web as it passes over the upper section, and circuitry is provided conserving energy by limiting the time the circuitry is energized.

Abstract: Optical scanning and inspection of loomed fabric on one or more looms is carried out using a travelling optical scanner that scans an inspection area of fabric on a loom faster than the fabric traverses the inspection area, such inspection area provided between the weaving portion of the loom and the fabric take-up roll. The scanner generates signals that can routinely be compared with preset reference standards and which can be used to control the stopping of the loom upon the detection of a weaving defect. Fabric moving through multiple looms can be scanned in sequence by a scanner traversing multiple inspection areas of the looms.

Abstract: A gripper head for looms working with removal of the filling thread from stationary bobbins comprises a clamping gap formed by a fixed stop and a movable clamping tongue. The clamping gap serves to fixedly clamp a filling thread which passes through the clamping gap essentially perpendicular to the central plane of the warp threads. The clamping tongue is structured to be displaceable in the lengthwise direction of the gripper head for opening and closing the clamping gap. Due to this actuation of the clamping tongue, by displacement thereof in horizontal direction, the clamping tongue is insensitive to flutter movements of the gripper head caused by vertical oscillations and there is ensured for more positive clamping of the filling thread.

Abstract: A weaving detector for detecting weaving defects generated on the surface of a ground fabric of a carpet or rug moving in a first direction is disclosed. The weaving detector moves in the direction of the width of the cloth and includes one or more detecting sensors spaced in the direction of the movement of the cloth. A guide sled is connected to the sensors and has upwardly curved ends so as to prevent the catching of a defect by the sled. The sensors only provide a defect signal when both sensors simultaneously detect a defect. The sensors are supported by upper and lower supports having vibration absorbing springs therebetween so that the electrical controls are not damaged by the vibrations.

Abstract: A floating electrode is positioned in the nip between a pair of tape pull rollers on a needle loom for sensing the presence of excess yarn in the nip caused by improper winding of the tape on a take-up roll or a wrap around one of the pull rollers to an undue extent. Upon contact of the electrode by the excess yarn, the electrode is raised to contact a screw to establish an electric circuit to a relay to stop operation of the loom. The distance between the contact screw and electrode is adjustable by threading or unthreading the screw in its support to accommodate acceptable slack on the take-up roll and wrap around the pull roller.