Abstract: A structure exhibiting enhanced barrier properties is disclosed and which comprises:a substrate,a metallic coating formed by vaporization and condensation upon said substrate, said metallic coating having a thickness of about 400A, anda plurality of sets of embossed patterns upon said coating, said plurality of sets of embossed patterns each having a line density between 100 and 50,000 lines per square centimeter, and method of making the structure.

Abstract: A process is provided for the purification of natural gas wherein the nitrogen content of natural gas is reduced to pipeline specification using a pressure swing adsorption processes with a suitable selective adsorbent for methane purification. More specifically, the present invention relates to the use of a particular combination of steps in the PSA cycle to produce a product natural gas having a reduced nitrogen content, a nitrogen-rich stream and a high heat content fuel gas stream.

Abstract: A vibrating two mass conveyor apparatus for conveying material includes a driven mass, which defines the vibratory material conveying path, and a driver mass for imparting a vibrating conveying force to the driven mass. A vibratory driven is operatively associated with the driver mass for imparting a vibratory force to the driver mass. The driven mass is located adjacent the driver mass, and is connected to the driver mass by resilient devices, such as coil springs. Link arms also interconnect the driven mass and driver mass, with the one end of each arm pivotally connected to the driven mass the other end pivotally connected to the driver mass. Supports connected to the link arms proximate the nodes of the link arms connect the apparatus to a support structure, such as the floor or roof of a building in which the conveyor apparatus is installed.

Abstract: In a friction false-twisting unit including three parallel spindles supported on a mount and each spindle carrying a stack of friction disks and the friction disks of the various spindles being interleaved, the thread to be threaded into the unit passing from an upper thread guide above the ends of the spindles, over a thread guide arm which holds the thread away from contact with the disks, and to a feeder system below the other end of the spindles. A support lever is movable between an operative position which holds the drive whorl for the spindles in contact with an operating belt and an inoperative position at which the spindle mount is moved to separate the drive whorl from the belt. The thread guide arm is on the support lever to be moved to the position holding the thread away from the disk when the support lever is moved to the inoperative position of the unit.

Abstract: A disk combination which permits a thread false-twisting device to be operated at a high withdrawal speed is disclosed. The false-twisting device has three parallel rotatable shafts. On a first shaft is a first inlet guide disk for guiding entering thread into a thread path. A second inlet guide disk on a second shaft guides the thread along the path. After the second inlet guide disk, a first working disk on the first shaft begins false-twisting the thread. The first working disk may be one of five working disks, each of which is positioned in the rotational direction from the preceding disk. After the last of the working disks the exiting thread contacts an outlet guide disk, also positioned in the rotational direction from the preceding disk. The disks may be made of a soft material, such as polyurethane, or may be rigid disks coated with a hard material such as nickel containing diamond particles. The thread can be drawn through the device at a speed in excess of 600 meters per minute.

Abstract: A false-twist apparatus has three parallel shafts carrying interleaved sets of friction disks interconnected by drive belts for joint rotation; one of these shafts is journaled in a stationary mounting plate while the others are journaled in a carrier pivotally connected with that plate for swinging about a fulcrum offset from the three shaft axes whereby two of the disk sets can be separated to facilitate the introduction of a yarn into the intervening twisting region. A whorl on the carrier-supported shaft nearest the fulcrum is normally driven by frictional contact with a continuously moving tangential belt but is disengaged from that belt in the swung-out position of the carrier so that the disks are arrested during introduction of the yarn.

Abstract: A false twist device has a pair of fixedly positioned spindles whose whorls are driven by a tangential belt and whose friction discs overlap wtih each other and with the friction discs of a swingable spindle mounted on an arm which can be angularly displaced about a pivot axis parallel to the spindle axis but spaced outwardly from the triangle defined by the axes of the spindles.

Abstract: A thread-loading device is used in combination with a false-twist apparatus having at least one frame element having an abutment surface turned away from the yarn-twisting region defined by three sets of axially spaced rotatable twisting disks. The thread-loading device has interengaging formations on the frame adjacent the abutment surface and on the support for releasably securing same together. These formations extend radially of the region. Thus the support can be fitted to the frame by being displaced radially toward the region to interfit the formations. A detent is carried in the support and displaceable between a blocking position engaged with the arm in the outer position thereof for preventing movement of the arm relative to the support and a freeing position permitting such movement.

Abstract: A friction disc for an apparatus for the false twisting of threads such as, for example, for crimping synthetic threads, has a thread engaging surface with a high co-efficient of friction and a convexly curved asymmetrical profile which is divided into three portions, each portion forming an arc of a circle having a different radius of curvature, the portion at the thread entry face extending over an arcuate length of about 90.degree. up to the apex of the profile and having a radius of curvature equal to between 0.4S and 0.5S, while the intermediate portion of the profile has a radius of curvature substantially equal to S and the portion of the profile at the thread exit face has a radius of curvature equal to between 0.075S and 0.1S, S being the thickness of the disc.