Abstract: Cryogenic vessels provided with improved thermal insulation by spirally generating two layers of thermal insulation thereon; permits thicker insulation without requirement of increased space and heavier equipment.

Abstract: Methods for forming rib and groove plastic fastener elements and for securing them to a film web are provided. The rib element, as extruded, has an arrowhead-shaped tip, a concave tail, and a generally upstanding stem portion connecting the tip and tail. The groove element is formed having a base with a pair of generally upstanding neck elements disposed on opposite ends of the base. The base does not extend beyond the neck elements. The rib and groove elements are readily secured to the film web without entrapment of air between the elements and film web. Reclosable plastic containers may be formed utilizing the disclosed rib and groove elements.

Abstract: A barrier film having excellent low oxygen permeability is provided and includes a flexible polymeric substrate having an adherent amorphous carbon coating. The coating is applied by generating a gas plasma from a hydrocarbon gas within a coating chamber such that ions in the gas plasma impinge upon the polymeric substrate. A barrier film having an ultra low oxygen permeability is produced by coating a second polymeric substrate over the amorphous carbon coating.

Abstract: A flexible sheet material and package formed therefrom is provided. The multilayer sheet material includes a first flexible heat sealable plastic material with antistatic properties on at least the one major surface thereof which first layer is laminated to a second flexible plastic material with an electrically conductive material on the one major surface thereof and antistatic properties on the other major surface thereof.

Abstract: A method for providing a wide-track integral thermoplastic closure for film or sheet stock. The closure includes ribs on either side of an element of the closure to provide the wide-track effect to assist one in ease of interlocking the closure elements. By varying the thickness of the closure element adjacent the ribs, the spacing of the ribs to provide the desired wide-track feel can be obtained.

Abstract: A method and apparatus for producing mesh film include an extrusion die for extruding a tube of a heat-plastified, resinous, mesh film material. A first cooling arrangement, centrally located within the extruded tube, cools the internal surface of the tube. The first cooling arrangement has an outer diameter substantially equal to the inner diameter of the extruded tube. A plurality of cooling nozzles are disposed radially outward from the first cooling arrangement for directing a plurality of streams of a cooling gas toward the exterior surface of the extruded tube. An annular gas bearing is spaced axially from the first cooling arrangement such that the extruded tube passes therethrough after leaving the first cooling arrangement, thereby permitting the diameter of the extruded tube to be increased subsequently by means of a trapped air bubble therewithin.

Abstract: An article transport arrangement for conveying articles along a pair of generally parallel transport paths from a first location to a second location includes a pair of vacuum belt conveyors which extend between the first and second locations, generally above the transport paths. A vacuum arrangement for applying a suction force to the articles in excess of that applied to the articles by the vacuum belt conveyors is positioned opposite the vacuum belt conveyors so as to ingest articles through a pair of collection openings.

Abstract: An improved cast process and apparatus for fusing closure elements, particularly those with thickened bases, to separately extruded film or sheet stock for making containers with integral reclosable closures. The process is applicable to webs of film which contain more than one pair of closure elements. The web is split immediately adjacent the die exit between adjacent pairs of closure elements to achieve a film having essentially erect closure elements and associated ribs should they be included. The process also permits beaded edges along both sides of the film. Improved containers can thus be produced.

Abstract: An apparatus is disclosed for providing uninterrupted guidance of a reclosable bag through a filling station in a form fill and seal system. The apparatus includes a guide mechanism positioned inside the bag film for providing uninterrupted guidance of the bag film through the filling station. The guide mechanism includes a first guide wheel for engaging the bottom of the bag film and a second guide wheel for engaging interlocked fastener elements on opposing plies of the bag film. A separating device is positioned along the path traveled by the bag film for separating the interlocked fastener elements as the bag film is advanced.

Abstract: Methods for forming rib and groove plastic fastener elements and for securing them to a film web are provided. The rib element, as extruded, has an arrowhead-shaped tip, a concave tail, and a generally upstanding stem portion connecting the tip and tail. The groove element is formed having a base with a pair of generally upstanding neck elements disposed on opposite ends of the base. The base does not extend beyond the neck elements. The rib and groove elements are readily secured to the film web without entrapment of air between the elements and film web. Reclosable plastic containers may be formed utilizing the disclosed rib and groove elements.

Abstract: The thickness of the barrier layer in coextruded multilayer, thermoformable resinous sheet material is controlled by transverse color monitoring during coextrusion of the sheet.

Abstract: A protected membrane roof system is provided comprising a roof deck having a waterproof membrane thereon with panels of foam plastic resin insulation on said membrane. Two layers of fabric, each layer of which repels approximately 60% of water reaching its upper surface, are placed over the insulation. Stone ballast lies on top of the fabric to retain it and protect it against ultraviolet solar radiation.

Abstract: The present invention relates to a stock material and a process for producing such stock material. The stock material comprises a first outer layer of polyamide resin, a second outer layer of polyolefin resin and a tie layer therebetween which comprises a copolymer of ethylene and maleic anhydride, a polyamide resin and a polyolefin resin. The process of the invention comprises the steps of providing a particulate material having a layer of polyamide resin, a layer of polyolefin resin and a layer therebetween comprising a copolymer of ethylene and maleic anhydride; admixing the particulate material with a copolymer of ethylene and maleic anhydride to produce a tie layer composition; and coextruding a tie layer of the tie layer composition between and in contact with a first outer layer of polyamide resin and a second outer layer of polyolefin resin.

Abstract: A wind velocity measuring apparatus tips over when a predetermined wind velocity is reached or exceeded. The apparatus includes a base adapted to rest on a horizontal supporting surface such as a roof. An upright member extends upwardly from said base and carries at its upper end a wind impeding device in the form of a cylindrical vane or a plurality of radially extending, arcuately spaced vanes. A "telltale" device is sealed within the base to indicate when the apparatus has been tipped over by wind equalling or exceeding the predetermined velocity.

Abstract: An insulated roofing system is provided in which a waterproof membrane is applied to the roof deck. Extruded panels of closed cell polystryrene foam are provided on top of the membrane, thus protecting the membrane from thermal cycling, ultraviolet rays, and physical damage. The foam panels provide excellent insulation and are resistant to water. A waterproof plastic film is bonded to the under surface of each panel positively to exclude water. The foam panels are extruded and are provided on the upper surface with integral ribs spaced by grooves. Concrete panels are laid directly on top of the polystyrene foam and lie gravitationally on the ribs. The ribs provided for ventilation and moisture removal on hot, dry days.

Abstract: A multilayer thermoformable packaging material is provided and includes one layer of barrier material containing a resin having low gas and vapor transmission properties. The multilayer structure also includes one layer which utilizes scrap produced from the multilayer structure. Other optional layers may be included in the structure to provide additional features such as rigidity and toughness.

Abstract: A device for engaging articles of varying thicknesses includes an anvil defining a gripping surface, a gripper finger assembly, and a finger actuator means for pivoting the gripper finger assembly with respect to the anvil. The gripper finger assembly includes a gripper finger, a finger support, and a spring which engages the finger and finger support and spring biases the finger into a neutral position with respect to the finger support. The finger may be moved out of its neutral position in either direction when forces in excess of predetermined forces are applied to the finger.

Abstract: A one-piece thermoformed plastic wrap dispenser is provided for containing and dispensing sheet wrapping material such as plastic film. The dispenser includes an elongated body having a pair of like confronting hollow body shells. Each of the body shells has a pair of adjacent longitudinal edges interconnected by an integral hinge. There are also confronting longitudinal edges. Each body shell has a cross-section of an isosceles triangle whereby the body has a square cross-section. The body shells also have end walls with confronting pairs thereof having means for retaining such end walls in confronting relation. An integral cutting member is hingedly connected to the confronting longitudinal edge of one of the body shells by an integral hinge and lies closely adjacent to a side wall of the other body shell.

Abstract: In an extrusion process a feed conduit for the die is positioned axially in the extruder barrel to provide minimal surface roughness on the extrudate. Increased extrusion rates of quality product are obtained.

Abstract: A dual dispensing bottle includes two upwardly extending necks having a trigger sprayer attached to one neck and a frangible orifice creating section integrally formed in the other neck. The frangible section is easily removed by twisting and doubles as a plug for the created orifice. The frangible twist-off section enables the consumer to dispense a large amount of product independently of and without removing the trigger sprayer. Since the frangible section is an integral part of the bottle, the easy open/reclose feature is obtained with negligible increase in the manufacturing cost of the bottle.