Abstract: Tamper-indicating package comprising two webs, each of which comprises a layer of polymeric material and a layer of continous filaments disposed in a random arrangement. The filaments are bonded to said polymeric layer. Upon access to the interior of the package, either the random arrangement of filaments will be altered or the polymeric layer will be damaged, thus indicating that the package has been subject to tampering.

Abstract: An image deletion fluid for printing plates which use a silver image as an ink-receptive area. The deletion fluid comprises iodine and an effective excess of iodide ion, which form a triiodide complex, and a hydrophilic-matrix-forming agent. In a preferred embodiment, the deletion fluid further comprises an organic, preferably polar, solvent. The deletion fluid is applied to the surface of the plate, rubbed briefly and allowed to dry there, with no removal or rinsing away of the deletion fluid or by-products required.

Abstract: A pressure-sensitive adhesive is provided which is a copolymer of an acrylate monomer which contributes to the visco-elastic properties of the copolymer and a copolymerizable mono-ethylenically unsaturated aromatic ketone comonomer free of ortho-aromatic hydroxyl groups by means of which the copolymer can be crosslinked upon exposure to ultraviolet radiation such that the amount of crosslinking comonomer and the degree of polymerization of the copolymer are controlled to obtain a creep compliance value of at least about 1.2.times.10.sup.-5 cm.sup.2 /dyne, the adhesive exhibits an enhanced level of initial adhesion when applied to skin but resists objectionable adhesion build-up over time. A preferred crosslinking ethylenically unsaturated hydroxyl-free aromatic ketone comonomer is p-acryloxybenzophenone.

Abstract: A retroreflective sheeting utilizing a particular polymer as the bead bond layer is disclosed. The polymeric bead bond comprises urethane and urea linkages, and has a stage prior to thermosetting in which it may be softened by the application of heat and in which it has a relatively nontacky character. The retroreflective sheeting disclosed possesses the unique combination of high reflectance and superior exterior durability.

Abstract: An electrical stimulator for biological tissue utilizing an output current monitor. A drive circuit supplies a transformer output stage with the secondary winding of the transformer coupled across the electrode adapted to be connected to biological tissue. A current monitor and a reference impedance, being substantially greater than the load impedance, are coupled in series with each other and in parallel with the secondary winding and the electrode. In one embodiment, an additional current monitor is coupled in conjunction with the primary winding of the transformer and a comparator is used to compare currents measured by both current monitors.

Abstract: Ionene elastomers are prepared by reaction of polymeric diamines and certain dihalide linking agents. These elastomers have utility in coating compositions, adhesive compositions, and in the fabrication of elastomeric articles. Certain novel dihalide linking agents are also claimed.

Abstract: A roll of tape or paper is releaseably retained upon a roll holder by a flexible retention member, carried by the holder and normally outwardly biased to engage the core of the roll. A pivotally connected arm is biased to urge a bearing element at the free end thereof against the outer surface of the paper roll to check uncoiling of the paper sheet. The bearing element is automatically lifted and positioned in response to movement of the roll against a camming surface during attachment of the roll to the roll holder. A detachably securable auxiliary roll holder applies tape along the normally free edge of the paper sheet. Also disclosed is an auxiliary tape dispenser carried by the frame of a portable masking machine.

Abstract: An article for testing liquid for free fatty acid comprises a substantially nonreactive, neutral and non-buffering, porous, absorbant support material having at least one portion thereof which contains a composition comprising an effective amount of acid-base indicator capable of changing color, when the predetermined amount of base has reacted with the known amount of free fatty acid, in a pH range on the order of 6-10, a predetermined amount of base compound reactive with free fatty acid and being present in an amount equivalent to a known concentration of free fatty acid, and about 30-99.5 parts by weight of non-volatile material of a substantially colorless, substantially neutral, humectant polyalkylene glycol organic solvent which is substantially non-volatile under ambient conditions. An organic liquid to be tested is contacted with the article and any color change in the article after the passage of sufficient time is observed.

Abstract: An improved electrical clip-like connector having a low profile and being capable of connecting the conductors of an electrical cable with the leads of an integrated circuit package or the like, employs reinforcing shrouds to prevent breakage of gripping teeth and improper installation of the connector. Provision also is made for convenient and secure attachment of an external ground and for good electrical connection between contacts of the connector and the leads of the integrated circuit package that might have an oxide film on their surface. A further feature of the invention provides a less stiff and easier to use handle for installing and removing the clip whereas a still further feature of the invention provides for reinforcement of relatively wide clip bodies in the proximity of contact supporting walls.

Abstract: The invention provides an extruded caulk strip comprising a shaped caulk body in melt fusion contact with one major surface of a protective strip formed of substantially amorphous, non-tacky, conformable, thermoplastic, film-forming polymeric material. The extruded caulk strip is formed by melt extruding the thermoplastic film-forming polymeric material to form a continuous plastic strip, melt extruding a caulk mass to form a shaped caulk body, and contacting one of the major surfaces of the strip with the shaped caulk body while the contacting surfaces of the strip and the caulk body are in a plastic state capable of self fusion on contact.

Abstract: An improved mold, apparatus and method for injection molding is provided. The apparatus is of the type which includes a means for opening and closing a multi-part injection molding mold, means for supplying molten material under high pressure into the mold cavity when the mold is closed and means for removing articles molded in the cavity on cooling. The improvement is provided by a new multi-part mold which is made up of at least two parts. Each part of the mold comprises a mold block portion having a ceramic mold cavity insert. The ceramic mold cavity inserts define the walls of the mold cavity when the mold is closed. Each mold cavity insert comprises a shaped ceramic body having a mounting surface adapted to fit under compressive stress throughout the entire molding operation within a mounting cavity of the mold block portion.

Abstract: A waterproof, moisture-vapor permeable unitary sheet material comprises a microporous polymeric matrix having pores comprising continuous passages extending through its thickness and opening into the opposite surfaces thereof, the passages being sufficiently filled with a moisture-vapor permeable, water-impermeable, hydrophilic material to prevent the passage of water and other liquids through the unitary sheet material while readily permitting moisture vapor transmission therethrough rendering the sheet material breathable. The unitary sheet is made by causing a liquid composition comprising the hydrophilic material or precursor thereof to flow into the pores of the matrix, then causing the conversion thereof to solid hydrophilic material.

Abstract: A cooking oil filtering apparatus has a frame and a filter supported therein. The filter is an assembly of juxtaposed layers including a filter layer formed of a uniformly porous web comprising randomly distributed, randomly interentangled, synthetic polymeric blown microfibers that are less than 10 microns in diameter and a support layer of highly porous, relatively stiff, light weight sheet material, more porous than the filter layer.

Abstract: Surfactants which are blocked against surfactant action (identified herein as "photolabile blocked surfactants") by a photolabile protective or masking group but which, on exposure to actinic radiation, become unblocked are provided. Coating compositions in which surfactant is formed on irradiation are provided by blending the photolabile blocked surfactant with polymeric film-forming materials.Compositions containing the photolabile blocked surfactants are useful when employed as protective coatings on various substrates or as the adhesive in a pressure sensitive adhesive tape. Although initially well adhering to a substrate, such compositions may be readily removed from the substrate following exposure of the same to suitable radiation which unblocks the surfactant to permit it to regain its surfactant activity.

Abstract: A vacuum cleaner disposable filter, preferably in the form of a closed container having an inlet for connection to the air discharge outlet of a vacuum cleaner, comprises an assembly of layers including an inner filter layer provided by a non-woven micro-fiber web formed of randomly entangled synthetic polymeric micro-fibers and highly porous outer support layers each preferably comprising spun-bonded non-woven webs on either side of the inner layer.

Abstract: The sol-gel process for forming dense, alumina-base ceramics, the process comprising1. preparing a dispersion of aluminum oxide monohydrate containing a precursor of a modifying additive in the form of a soluble salt;2. gelling the dispersion;3. drying the gel dispersion to form a solid;4. calcining the solid; and5. sintering the calcined solid,is improved by adding to the dispersion at least about 10 weight percent, based on the oxide equivalent of the soluble salt precursor, of at least one densification aid selected from the group consisting of alcohols, glycols and polyether compounds having a vaporization point in excess of the temperature at which the dispersion is dried. This improved process is particularly useful for manufacturing abrasive grains.

Abstract: A pressure-sensitive adhesive transfer tape of the prior art has an adhesive layer containing uniformly dispersed glass monofilaments which randomly cross each other but are predominantly oriented in the lengthwise direction of the tape and generally lie in straight lines. In contrast, the monofilaments of the transfer tape of the present invention are organic and have a randomly disposed, individually arcuate configuration as shown in FIG. 2. Unlike the prior tape, the novel tape can have high adhesion and shear values and yet be dispensed from an ordinary adhesive transfer gun.

Abstract: The invention provides normally tacky and pressure-sensitive adhesive compositions comprising a polymer having an inherent viscosity greater than 0.2 and having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol and, having attached to the backbone, polymeric moieties having a weight average molecular weight of above about 2,000 and a T.sub.g of above about 20.degree. C. The number and composition of the attached moieties in the polymer is such as to provide the adhesive composition with a shear holding value of at least 50 minutes. Sheet materials coated with the adhesive composition are also provided. Preferred adhesive composition comprises a copolymer monomeric acrylic or methacrylic acid ester of non-tertiary alcohol and macromolecular monomer. The copolymer may also include up to 12% by weight of a copolymerizable polar monomer such as acrylic acid.

Abstract: The use of an aromatic amine salt of a substituted pentafluoroantimonic acid as a curing agent for epoxy resins, and the use of the epoxy resin compositions as binders for abrasives in abrasive sheet products, are disclosed. The aromatic amines are selected from aniline and hindered aromatic amines.