Abstract: A plug-in connector assembly for ribbon cables comprises a ribbon cable, a plug-in connector, a locking spring and a locking spring housing. The locking spring may engage the ribbon cable in a shape-mated fashion to provide lateral guidance of the ribbon cable. The ribbon cable may be configured with a recess for spring-actuated engagement to provide strain relieving locking of the ribbon cable and to provide a region of electrical contact with the locking spring to enhance shielding contact.

Abstract: An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves adding a free-radical initiator to a mixture of a microemulsion of at least one liquid saturated organic compound; and tetrafluoroalkyl ethylene.

Abstract: A deaeration assembly for removal of air or other gases dissolved in a liquid. The assembly includes a deaeration element having a gas-channel-forming component enclosed and sealed within an envelope which includes a nonporous fluoropolymer film. The assembly also includes a liquid-channel-forming component which can be positioned on the outside of the element, or can be enclosed with the gas-channel-forming component within the element. The assembly can be formed in spiral-wound or folded configurations for installation in a deaeration module or apparatus. The deaeration assembly is useful for removal of gases dissolved in chemically aggressive liquids, high-purity liquids, and other special liquids.

Abstract: An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves forming a microemulsion of at least one liquid saturated organic compound; adding gaseous tetrafluoroalkyl monomer to the microemulsion; and initiating polymerization by adding a free-radical initiator to the mixture.

Abstract: The invention relates to an optical device having a first laminate and a second laminate between which are disposed a first plurality of optical components arranged in a first plane. At least one of the first laminate and the second laminate includes a first layer having high mechanical strength and a second layer having high compressibility. Preferably, the laminate further includes adhesive for affixing the optical components. More preferably, the adhesive is an adhesive layer. The first layer has a tensile strength of 8,000-15,000 psi and the second layer has a density between 0.6 g/cm.sup.3 and 1.8 g/cm.sup.3. Preferably, the second layer is made from expanded PTFE. The adhesive layer is either a pressure-sensitive adhesive or is selected from the group of adhesives having the properties that it is tacky at room temperature and pressure and hardens at a temperature between 50.degree. C. and 100.degree. C.

Abstract: A liquid metering and coating assembly for use in a thermal toner fixation unit of a plain paper copier or printer. The assembly consists of a release oil-supply roll having a compliant and flexible porous permeation control layer and a cleaning blade. The cleaning blade is mounted so as to contact the surface of the permeation control material. The cleaning blade removes excess toner and other incidental debris from the surface of the permeation control layer thereby providing a freshly cleaned surface from which controlled amounts of release oil are uniformly coated onto the surface of an adjacent contacting roll.

Abstract: Complex-shaped articles formed by gas-pressure-molding composite preforms of liquid crystal polymer and porous polytetrafluoroethylene material are described. Processes for making the composite material preforms and parisons needed for gas-pressure-molding methods, such as vacuum-molding and blow-molding, are also described.

Abstract: The method is disclosed for producing a tamper respondent enclosure (10). A flexible tamper respondent laminate (32) is folded to define an inner enclosure (26) which is then potted within an outer enclosure in the form of a molding (28).

Abstract: The invention concerns a thin film of a permanent hydrophobic and optionally oleophobic finish for polymer surfaces. The film is formed from at least one layer of a water-soluble polycation and cationic synthetic resin. For further improvement of the oleophobic and permanent hydrophobic properties the film can additionally contain a long-chain surfactant or an alkyl-substituted polyanion.

Abstract: Microspheres are described which have a shell of thermally expandable polymer and a hollow interior that contains a fluorinated hydrocarbon that boils at a temperature below the melting point of the polymer, and contains an organic ester or ether or ketone. The ester or ether or ketone improves the quality of microsphere product. The expandable particles are useful in insulation, packaging, for expanding other polymer such as polytetrafluoroethylene, and the like.

Abstract: A deaeration assembly for removal of air or other gases dissolved in a liquid. The assembly includes a deaeration element having a gas-channel-forming component enclosed and sealed within an envelope formed of a non-porous fluoropolymer film. The assembly also includes a liquid-channel-forming component which can be positioned on the outside of the element, or can be enclosed with the gas-channel-forming component within the element. The assembly can be formed in spiral-wound or folded configurations for installation in a deaeration module or apparatus. The deaeration assembly is useful for removal of gases dissolved in chemically aggressive liquids, high-purity liquids, and other special liquids.

Abstract: A sound-transmissive cover assembly which provides protection from the ambient environment to transducers such as microphones, loudspeakers, buzzers, ringers, and other delicate devices; and across which sound energy can pass with very low attenuation. The cover assembly has a protective membrane layer and a porous support material layer which are selectively bonded together at least in the outer region near their edges. An inner unbonded region surrounded by the bonded outer region is provided so that the protective membrane and porous support layer can vibrate or move independently in response to acoustic energy passing through them. An embodiment of the assembly includes at least one acoustic gasket attached to one or both of the layers so as to not impede independent movement of the layers.

Abstract: Microporous membranes are described and characterized as having a morphological microstructure of very highly elongated nodes interconnected by fibrils which form a structural network of voids or pores through the spaces between the nodes and fibrils, which voids or pores extend from one side of the membrane to the other. The membranes are highly uniform in terms of mass per volume, have very high strength and a very open microstructure.

Abstract: The invention is a stretchable layered fabric laminate which is air impermeable and waterproof while being permeable to water vapor. The stretchable fabric laminate includes a stretchable composite material layer consisting of a hydrophobic protective layer of a porous polymeric material on each side of a layer of hydrophilic water-vapor-permeable synthetic polymer. The composite material layer is laminated to at least one layer of stretchable fabric. The stretchable layered fabric laminate has excellent stretch and recovery properties in both machine and transverse directions, and is useful for the manufacture of form-fitting articles of protective clothing and other end uses.

Abstract: In this invention a novel configuration of the crotch area between the thumb and first finger has been found to impart unexpectedly good durability and resistance to splitting of the seam in this crotch area. The configuration is one in which the geometry of the crotch area is formed by two arcs separated by a short substantially straight portion, and in which the radii loci of the two arcs is centered in the space between the thumb and first finger.

Abstract: A filter assembly for gas filtration including a support cage and a filter bag made of, or which includes, a fabric containing fiberglass yarns. The support cage has widely spaced vertical supports which provide filter bag support surfaces having a large radius of curvature. The wide support areas reduce damage to the filter bag material from cyclic bending and flexing.

Abstract: A fabric presents a non-camouflage pattern under visible light and a camouflage pattern under infrared radiation. The fabric may appear under visible light to have a continuous solid color and thus be suitable for use in police uniforms.

Abstract: Oriented materials are described in which particular crystalline materials are grown on a highly-oriented polytetrafluoroethylene substrate. Compositions are provided comprising a layer of aligned molecular chains of oriented polytetrafluoroethylene and an overlayer of a second polymer that imparts desired properties to the construction. A third layer of crystallizable, orientable material is then deposited on the overlayer. The third layer becomes oriented. The materials are useful as polarizers when the third layer is a polarizing dye.

Abstract: A textile material is described which provides thermal image masking or suppression in the mid and far infra-red region without compromising the effectiveness of visual and near IR camouflage or comfort level, or the effectiveness, and mobility of a person. This is achieved by incorporating a metallized microporous membrane into a typical article of clothing or covering, e.g. tents, which suppresses thermal imaging. Specifically an air permeable, moisture vapor transmissive, waterproof, heat reflecting material of at least one metallized microporous membrane is laminated to at least one other layer or textile backing material such as woven, nonwoven or knitted nylon, polyester, cotton, silk, etc. or additional microporous layers, in which the metal in the metallized membrane forms a discontinuous layer an the surface and on the pore walls adjacent the surface of the microporous membrane.

Abstract: A shoe comprising an inner-sole and a sole, a plurality of microholes being arranged at least through the central portion of both of them, and an inner liner of a material such as Gore-Tex, wherein, between said inner-sole and said sole, a layer is provided of a resilient material, such as corrugated felt.