Abstract: A web guide for use with web conveying apparatus. The web guide is pivotally mounted on the apparatus so that movement of the web relative to the web guide is attenuated as the web passes through the web guide.

Abstract: A low-density nonwoven abrasive pad, especially suited for use as a scouring article, formed of a multiplicity of continuous, crimped thermoplastic organic filaments having one end of substantially all of the filaments bonded together at one end of the pad and the opposite end of substantially all of the filaments bonded together at the opposite end of the pad. The abrasive pad is made by arranging the filaments into an open lofty array, bonding substantially all of the filaments together at a first and second bond site, and then cutting the array at the bond sites such that each bond is divided into at least two bond area segments with each bond area segment having the filament array bonded therein in a unitary structure.

Abstract: A calibration device for an auditory prosthesis, such as a hearing aid, and an auditory prosthesis which contains such a calibration device. The calibration device comprises memory in which is stored information which is characteristic of information intrinsic to the invididual auditory prosthesis, the information being either information which represents a sufficient set of adjustment parameters required to calculate the transfer function of the auditory prosthesis or manufcturing information and a mechanism by which this information may be utilized by the auditory prosthesis or by the programming system of such auditory prosthesis.

Abstract: A portable device for guiding a length of pressure sensitive adhesive coated tape partially onto the outer wrap of a roll of masking material adjacent one of its edges to provide a composite masking sheet for use in masking surfaces comprising a length of the sheet material having the tape adhered along and extending widthwise past one edge by which the composite masking sheet can be adhered to a surface. The outer edge of the tape is not guided by the device, and a tendency that otherwise exists for the tape being adhered along the edge portion of the roll of masking material to move transversely away from the masking material so that less and less of the tape is adhered to the masking material is restricted by a tracking member mounted on a frame of the device between a hub supporting a roll of the tape and the roll of masking material.

Abstract: The invention provides a reflective sheeting material having a structured reflective surface having a linear ray of isosceles prism reflecting elements, each element including a pair of reflective surfaces at an angle of about 120.degree. therebetween. The invention also provides a reflective sheeting material having a structured reflective surface comprising an array of reflecting elements, each comprising a polyhedron having three paralellogram faces. The invention also provides an apparatus such as a light pole for transporting light and reflecting the light in a broad, uniform pattern. The apparatus comprises (a) a columnar light conduit, for transporting light therealong, the conduit having a proximate end and a distal end; (b) a light source provided at the proximate end of the light conduit,and (c) a light distributing reflective member, such as the reflective sheeting material described above, comprising a multiplicity of repeating reflecting elements.

Abstract: A receptor sheet for image-transfer processes is provided by providing a backside polymeric coating on the sheet with differential surface characteristics which can be visually observed. The characteristics may define a logo to differentiate the backside from the receptor surface.

Abstract: Apparatus for aligning an elongate web with respect to a predetermined path of travel. The web is supplied from a supply roll formed by the web being wound around an inner web layer and having an outer web layer. The apparatus includes a frame, and an axle assembly on the frame adapted to hold the supply roll for rotation about an axis to afford unwinding of the web from the supply roll, and adapted for axial movement of the supply roll. An alignment device is provided comprising web-guiding rollers mounted on the frame and generally rigid in the direction parallel to the axis of the rotatable-holding means. The web-guiding rollers guide the opposite edges of the outer web layer of the web laterally with respect to the longitudinal direction of the web, with the axle assembly affording translation of the supply roll to accommodate telescoped or non-uniformly wound supply rolls, thereby to maintain alignment of the outer web layer with respect to the predetermined path of travel.

Abstract: A Doppler blood flow system and method in which an ultrasonic wave is reflected off of red blood cells in blood flowing in tubing. The reflected ultrasonic wave is digitally processed in the frequency domain. The flow rate of the blood is directly related to the average frequency of the Doppler signal. Because the Doppler blood flow system calculates flow rate solely on the basis of frequency, a special case exists at zero rate of flow where the received signal is not a valid Doppler flow signal, but rather purely noise. The noise at zero flow rate is random and will not have an average frequency which is unique to zero flow. The Doppler blood flow system and method must invoke a special case determination of when a zero flow condition exists in order to accurately provide a blood flow rate. The system utilizes a method of determining the rate of flow of a fluid containing particles flowing through a tube. An ultrasonic signal is transmitted through the tube at an oblique angle thereto.

Abstract: A polymeric latex to load photographically useful compounds into photographic elements comprises, as a dispersed phase, fine particles of a hydrophobic polymer which, for at least 70% of its weight, comprises:(a) repeating units derived from an ethylenic monomer containing a sulfonic or sulfonate group which monomer is capable of forming hydrophilic homopolymers, said units comprising 0.5 to 1.5% by weight of said hydrophobic polymer,(b) repeating units derived from an N-3-oxo-alkyl-substituted acrylamide, said units comprising from 5 to 25% by weight of said hydrophobic polymer, and(c) repeating units derived from acrylic acid ester monomers having a TG lower than 0.degree. C., said units comprising at least 43.5% by weight of said hydrophobic polymer,the remaining polymer weight percentage, from zero to 30%, being formed by repeating units derived from inert monomers and/or cross-linking monomers.

Abstract: A biaxially-oriented polymer film having dual-sided appearance, i.e., the color of each side is chromatically different. Also a method for making such films.

Abstract: A guard for teeth on a cutting blade comprising a guard portion having a side part adapted to lay along one side of the teeth and a projecting part adapted to project past the points of the teeth, an anchor portion adapted to be fixed to the blade at a position spaced from the teeth, and a hinge portion of resiliently flexible polymeric material joining the guard and anchor portions. The hinge portion affords movement of the guard portion relative to the anchor portion from a normal protecting position along and projecting past the teeth, to a cut position spaced from the teeth so that the teeth can be used to cut material, while biasing the guard portion to its normal protecting position.

Abstract: An assembly useful in conjunction with a signal transmission means for the measurement of a compositional parameter of the blood of a patient is disclosed. This assembly comprises a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from the patient is passed from a hollow tube, the fluid flow passage being defined by a wall which is substantially impermeable to blood, the housing being adapted to be removeably secured to a signal transmission system such that the housing is capable of being removed from the signal transmission system without disrupting the fluid flow passage; and a sensing element located in the housing in or near the fluid flow passage for providing a signal directly to the signal transmission system in response to a compositional parameter of blood located in the fluid flow passage.

Abstract: A full face negative pressure respirator having a replaceable viewing window is described. The respirator is especially useful as a welder's negative pressure full face respirator where the viewing window is subject to chipping and/or scratching that can impair the vision of the wearer. The full face negative pressure respirator of the present invention utilizes a viewing window insert assembly that comprises an integrally molded curved insert wall and viewing window chamber that accommodates easy replacement of an optically damaged viewing window while providing a gas tight seal between the viewing window and the insert assembly which is not subject to failure by an increase in negative pressure within the facial cavity of the respirator during normal use conditions.

Abstract: The addition of certain classes of organic salts to infrared sensitive silver halide photographic emulsions can provide supersensitization, improved liquid hold time stability, and photographic emulsion stability.

Abstract: This invention concerns the discovery that sol-gel process alumina abrasive grain provides superior performance in bonded abrasives for grinding cast iron. In a preferred form it is disclosed that bonded abrasives of sol-gel process alumina abrasives in combination with other abrasive grains such as those of silicon carbide and fused alumina also provide superior grinding of cast iron.

Abstract: Dental mandrels, circular in cross-section, and detachable abrasive disks useful in confined areas of the mouth, in which the disk can be mounted on and demounted from the mandrel using finger pressure, and the disk can optionally be rotated relative to the mandrel when the mandrel is at rest, but the disk is gripped sufficiently firmly when the mandrel is spinning that no slippage of the disk is apparent under dental grinding conditions.

Abstract: Oriented microfibers and processes for making them are disclosed, together with blends of such microfibers with other fibers such as crimped staple fibers and non-oriented microfibers.

Abstract: A device for applying spaced layers generally transversely across an elongate web which defines a through path for the web including parallel inlet and outlet path portions spaced sideways from each other and a transverse path portion between adjacent terminal and beginning ends of the inlet and outlet path portions. The web is moved lengthwise at a predetermined speed in a first direction along the inlet and outlet path portions, the device periodically moves the portion of the web along the transverse path portion generally edgewise in a direction parallel to the first direction and at about the predetermined speed to essentially stop longitudinal movement of the portion of the web along the transverse path portion; and the device applies a layer of material such as tape generally transversely across the portion of the web along the transverse path portion as it moves tangentially by the periphery of a rotating applicator drum.

Abstract: A retroreflector sheet comprising a base sheet and integral protrusions having a top and a side surface. Selected side surfaces are covered with a bead bond layer including partially embedded retroreflector beads. A process for preparing the retroreflector sheet is also disclosed.

Abstract: Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azomethine group, whose methine group is substituted with a 5-amino-1,2,4-triazolyl group, and/or copper complex compounds thereof.Preferably said direct positive photographic elements are multi-layer elements comprising internal latent image type type silver halide emulsion layers sensitized to different regions of the visible light and associated with image-dye providing compounds (photographic color couplers).