Abstract: A system, apparatus and methods are described for the treatment of fibrous materials and, in particular, works of art on paper, with aqueous treating fluids introduced to a treatment chamber by means of an ultrasonic humidifier creating contact between the fibrous materials being treated and an absorbent material beneath it through air pressure, and drawing filtered air through the material being treated to dry the material by means of an underlying vacuum.

Abstract: Sterile solution delivery and venting devices for use with multi-dose sterile solution packages are disclosed. The devices include a positive acting, normally closed check valve which opens to express solution from the package when squeezing pressure is applied and which automatically closes when the pressure is released. A hydrophobic filter is included to sterilize the replacement air which enters the package upon release of the squeezing pressure.

Abstract: A single use vial is provided in clusters of five or two times five separably joined vials. The vials are molded and filled with a medicated or non-medicated solution and each vial is provided with a converging, planar front wall. The vials include an integral dispensing nozzle, having a conduit which can be exposed by removing a twist off closure. A common separation strip joins the facing side of adjacent vials in the cluster but not the twist off closures. The angle of convergence of the front wall is designed to elevate the conduit above the solution level when the front wall is placed upon a horizontal surface to prevent unwanted dripping prior to use.

Abstract: Novel polyurethanes especially suited for applications requiring initial heat resistance in a non-alcohol, non-exotic solvent system such as methyl ethyl ketone and having peel strengths of at least 5 pounds per linear inch (pli) uncrosslinked at about 180.degree. to about 200.degree. F., optionally containing crosslinkers, and which are typically used in the automobile industry, are described.

Abstract: A self-cleaning paper trap for use within a dust control system and mounted in the duct to trap sheet materials. The paper trap includes a housing which carries a plurality of spaced grid bars to trap the sheet materials and a wiper bar which is vertically reciprocal relative to the grid bars to wipe trapped sheet materials from the bars. An automatic cable control apparatus is operatively engaged with the wiper bar to permit remote wiper bar actuation without the need for system shut-down.

Abstract: Improved adhesive compositions for laminating plastic and particularly vinyl films to metal are described which contain about 15 to 30 percent by weight of a phenolic resol having a methylol content of about 15 to 50 percent by weight, about 25 to about 40 percent by weight of certain nonfunctional polyurethanes having a molecular weight of at least 20,000 and preferably 60,000 to 300,000 and about 35 to 55 percent by weight of a vinyl solution polymer, all in an organic solvent. The nonfunctional polyurethanes are thermoplastic polyesterurethanes devoid of reactive isocyanate and hydroxyl groups and are derived from monomeric polyisocyanates and polyhydroxy compounds chain-extended with a low molecular weight diol, preferably a cycloaliphatic diol, to the desired molecular weight. When the polyhydroxy compound is a polycaprolactone polyol, it is essential that chain extension be effected with a cycloaliphatic diol, preferably dimethylolcyclohexane.