Abstract: Apparatus for reading out information magneto-optically recorded in a magnetic layer comprises a single, polarization-preserving optical fiber for transmitting plane-polarized readout radiation from a source to the recording layer, as well as for transmitting such radiation, upon being reflected by the recording layer, toward a pair of photodetectors for the differential detection of the Kerr rotation angles (.+-..THETA..sub.k) produced by the up/down orientation of the vertically oriented magnetic domain in the recording layer. Optical feedback of the reflected readout radiation to the readout source is minimized by the provision of a pair of polarization beam-splitters having a 45 degree magneto-optic polarization-rotator (e.g. a Faraday rotator) positioned therebetween. The polarization beam-splitters and retardation plate are positioned in the optical path between the readout source and the optical fiber.

Abstract: Color film scanning apparatus employs a novel trilinear array image sensor with photosites spaced apart in the linear direction of array by a pitch which is a multiple of the photosite dimension in the linear direction. The resultant scanning apparatus allows positioning of the image sensor in close proximity to the film without the need for interposition of optics for beam splitting or image focusing on the sensor arrays.

Abstract: A film scanner is disclosed which comprises a dynamic film gate. The film gate includes a pair of capstans for supporting the film at an imaging station and a pair of belts which clamp the film against the capstans. The capstans are driven to advance the film through the imaging station.

Abstract: An antibacterial aqueous composition comprising a) a zinc acetate complex characterized in that the composition also contains b) from 0.1% by weight to 1.0% by weight of a selected surfactant is disclosed. Nonwoven wipes containing such composition is also disclosed.

Abstract: Solid form additive systems which are dispersible in aqueous media are disclosed, as are methods for preparing such additive systems and methods for dispersing such additive systems in aqueous media. Also disclosed are methods for applying additive to polymeric particles and the polymeric particles treated by such methods.

Abstract: A printing mechanism such as a thermal printer includes a rotatable cylindrical platen having a circumference which is smaller than the printing length of a complete image to be reproduced on a print medium, and at least one pinch roller. The platen has a width which is wider than a width of the print medium. The platen includes a rigid central longitudinally-disposed shaft, a cylindrical elastomeric layer formed around a central logitudinal section of the shaft, and first and second opposing cyclindrical registration members. The first and second registration members are fixedly coupled to the shaft and engage a first and a second end of the elastomeric layer, respectively, so that the shaft, layer, and members rotate together. Each pinch roller is formed of a rigid material and is disposed longitudinally to the platen.

Abstract: A toner image, for example, a multicolor toner image, is transferred to a receiving sheet carried by a heated transfer drum. The multicolor image is fixed by pressure between a fusing web or sheet and the toner image exerted by a heated pressure roller and the transfer drum. The fusing web or sheet and the receiving sheet are transported away from the transfer drum and pressure roller to cool, after which they are separated.

Abstract: A technique for detecting erroneous pixels in image data output by a scanner. A first aspect of the technique is to test for the existence of an erroneous gap by comparing the values of selected pixels to one of several predetermined patterns. A potential gap is identified wherever a center pixel of a background value is located between two pixels of a foreground value. A second aspect of the technique tests for the existence of an erroneous gap by examining the values of pixels surrounding the potential gap more completely. In particular, the relative sizes of two line features on either side of the potential gap are determined by tracing the feature's perimeters to locate terminus pixels. If the terminus pixels are farther apart than a predetermined distance, it is concluded that a gap exists. The technique can be easily adapted for rapid execution on both bitmap and run encoded image data.

Abstract: A film cassette comprises a film spool supported within a lighttight shell for rotation in an unwinding direction to thrust a filmstrip coiled about the spool to the exterior of the shell and for rotation in a winding direction to return the filmstrip to the interior of the shell. According to the invention, a locking device is connected to the spool and the shell for preventing rotation of the spool in the unwinding direction, and is enabled for such purpose in response to rotation of the spool in the winding direction. This prevents a photographer from reusing the cassette in a camera after the filmstrip is fully exposed. The locking device can be manually defeated to reuse the cassette in the camera when the filmstrip is only partly exposed.

Abstract: An apparatus for chilling, drying and incubating a photographic emulsion in an integrated process at a single locus includes a chamber, a platen and means for chilling and heating the platen and providing a flow of air of controlled temperature and humidity over the photographic emulsion.

Abstract: A photographic naphtholic coupler comprising a ballast free naphtholic coupler moiety containing a --CONH.sub.2 group in the 2- position and a ballasted coupling-off group in the 4- position enables good wash out of dye formed upon oxidative coupling from a photographic material during processing of such a photographic material. Such a naphtholic coupler is useful in photographic silver halide materials and processes.

Abstract: Disclosed is a novel tobacco smoke filter material comprising a filter element such as cellulose acetate crimped tow having at least about 1 weight percent of micro acicular crystals of a compound such as sodium carbonate present on the surfaces of the filter element. Also disclosed is a process for preparation of such tobacco smoke filter material comprising immersing the filter element in a solution of the compound capable of forming the micro acicular crystals, followed by removing the filter element from the solution and removing residual liquid, thereby forming the novel tobacco smoke filter material.

Abstract: A photoconductive drum has a flexible photoconductive loop and an expandable mount. The mount includes a shell with a slit allowing the shell to expand. A pair of wedges are moved toward each other on a shaft. Cam surfaces on the wedges push against chamfered corners on ribs extending inward from the shell to expand both ends of the shell. The shell assumes the shape of the loop even though loop is slightly conical.

Abstract: Apparatus for drying webs of light sensitive material comprises means defining a channel for receiving a web, a plurality of elongated spaced injection slits for applying drying fluid to opposite sides of the web, and a plurality of elongated spaced evacuation slits for evacuating drying fluid from opposite sides of the web. The injection and evacuation slits are substantially parallel and angularly oriented relative to the longitudinal axis of the web.

Abstract: A variety of sizes of prints are made electrophotographically utilizing a single large size receiving sheet, for example, a receiving sheet that is 12.times.18 inches. The receiving sheet is large enough to receive one image of the largest size or an array of smaller sized images. The receiving sheet with smaller images is cut to size after transfer. The method is particularly useful in forming multicolor images on a receiving sheet wrapped around a transfer drum.

Abstract: An internal junction organic electroluminescent device is disclosed comprised of, in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode. The organic electron injecting and transporting zone is comprised of an electron injecting layer in contact with the cathode and, interposed between the electron injecting layer and the organic hole injecting and transporting zone, a blue emitting luminescent layer comprised of a bis(R.sup.s -8-quinolinolato) aluminum(III)-.mu.-oxo-bis(R.sup.s -8-quinolinolato)- aluminum(III), where R.sup.s substituents are chosen to block the attachment of more than two substituted 8-quinolinolato ring nuclei to any one aluminum atom. Increased operating stability and device emission at even shorter blue wavelengths can be realized by the incorporation of a pentacarbocyclic aromatic fluorescent dye.

Abstract: A dual augar development apparatus for use in an electrostatographic reproduction machine such as copier or printer, includes a pair of identical single piece auger devices mounted therein and each having a shaft and a plurality of integrally formed blade members so as to require no blade-member-to-shaft-assembly. A last blade member includes a cross-transfer member connected thereto and integrally formed therewith. The blade members are semi-elliptical and form a single straight row of such members on the shaft. The row is aligned circumferentially so as to result in intermittent augering of developer material in the development apparatus.

Abstract: In a film cassette, a film spool comprises a spool core supported for rotation in an unwinding direction to thrust a leader section of a film roll coiled about the spool core to the exterior of the cassette, a pair of flanges radially confining the film roll and loosely coupled coaxially with the spool core normally to permit the spool core to be rotated relative to the flanges in the unwinding direction, and engagement means rotatably fixed to the spool core for rotation with the spool core relative to the flanges in the unwinding direction to move into engagement with one of the flanges to make the one flange rotate in unity with the spool core in the unwinding direction. According to the invention, the one flange is resiliently flexible, and biasing means distorts the one flange for urging the one flange firmly against the engagement means to ensure the engagement means will engage the one flange when the spool core is rotated relative to the flanges in the unwinding direction.

Abstract: Positioning of a scan line (L) relative to a recording medium drum (15) of a polygon printer is established by independently adjusting blocks (35, 36) mounted on a scan line generating optics module (10). The blocks (35, 36) have inverted V-notches (38) that nest in two-point tangential contact onto cylindrical surfaces of drum bearings (33, 34). X, z .theta..sub.x and .eta..sub.z positions are set by x and z direction adjustment screws (44, 45, 49, 50) mounted on frame (11) that move against blocks (35, 36) against the bias of springs (61) and the weight of the frame (11). Clamping screws (56, 57) pass through oversized holes (58) and z direction elongated slots (59) on blocks (35, 36) to releasably lock blocks (35, 36) after adjustment. Alignment of holes (58), slots (59) and notches (38) maintains a constant angle of incidence during adjustment. A notch (41) of projection (40) of frame ( 11) engages with a pin (42) on printer body (29) to set y and .theta..sub.y positioning.

Abstract: A light collector collects and detects light emitted from a photostimulable phosphor sheet in a photostimulable phosphor imaging system. The collector includes a vertical mirror extending the width of the phosphor sheet; and a V-roof mirror having upper and lower mirrors forming an apex facing the vertical mirror. The vertical mirror and V-roof mirror form slots for passing a scanning beam of stimulating radiation through the collector to the surface of the photostimulable phosphor sheet and for admitting emitted light from the phosphor sheet into the collector. The vertical mirror and V-roof mirror have a substantially triangular cross-section which diminishes in size from one edge of the phosphor sheet to the other edge thereof. A photodetector is positioned at the large end of the triangular collector for receiving light emitted from the photostimulable phosphor sheet and for generating an electrical signal in response thereto.