Abstract: A flip-up flash unit for a camera has a viewfinder opening for viewing a subject to be photographed when the flash unit is swung to an operative position elevated from the body of the camera. A finder objective lens and a finder eyelens are each swung to individual viewing positions optically aligned with the viewfinder opening, responsive to movement of the flash unit to its operative position. The body of the camera, therefore, can be made more compact because the need for a viewfinder opening and finder lenses built into the body is eliminated.

Abstract: Processing apparatus for photographic film, particularly intraoral xray film, in which the various processing stations are positioned in a circle about a central rotatable column. The column has an external spiral groove in which rides a pin carried by, and extending into the bore of, a hub which fits around the column. Rotation of the column moves the hub up or down, depending upon the direction of rotation. The hub carries a plurality of arms equal in number to the number of stations, seven in the apparatus disclosed. Each arm has a magnet for attaching a novel film holder which is detachable at the unloading station. After loading a film holder with film to be processed, the holder is loaded into the machine through a spring-pressed loading door onto a loading platform which moves the film holder upwardly to engage it with one of the arms when the door is closed.

Abstract: Operating mechanism for cameras, particularly of the single use type, in which a first gear wheel depressed by the shutter release button thus unblocks a spring biased slide member initially blocked against movement by engagement of an edge of the slide member with the periphery of the gear wheel. Upon release, the slide member moves partially over the gear wheel and blocks the wheel's spring biased movement to its original position. The slide member actuates the shutter in the course of such movement. A second gear wheel, meshing with the first gear wheel, lies below the slide member and carries a cam which lies in an opening in the slide member and engages the slide member to move it back to its original position when the first gear wheel is rotated by the user to transport film to the next exposure. Lugs carried by the slide member and the second gear wheel cooperate to limit rotation of the gear wheels to that appropriate to film transport to the next exposure.

Abstract: The hydroformylation of olefins with rhodium complex catalysts is described. The catalysts employed comprise a rhodium complex with at least one bidentate ligand having a specified structure, ##STR1## Hydroformylation reactions at relatively low temperatures and pressure and yet with high rates of reaction and high selectivity to aldehyde product are obtained by the practice of the present invention.

Abstract: Apparatus is disclosed for controlling the charge-to-mass ratio of developed electrostatic images. An electrostatographic reproduction machine for developing an electrostatic latent image with charge toner particles produces a control signal characteristic of the ratio of toner partical electrostatic charge to the toner particle mass, and the charge-to-mass ratio is adjusted in response to the control signal. The control signal is produced by comparing the ratio of toner particle electrostatic charge to the toner particle mass of a toned test patch. The ratio is adjusted by means of ions directed to the toner particles. The ion source may be capable of producing positive and negative ions, and may be a corona charger.

Abstract: A light-emitting diode device having a thin film of silicon nitride or the like is selected so that the intensity of the emitted light can be maintained at a more or less constant level even when the temperature of the light-emitting section rises.

Abstract: Method and apparatus for economically storing page data for reproduction by a high quality, color, gray-scale printer. A relatively large color value memory is used to store 24-bit color values for the entire page as they are received from the incoming data. The addresses of the color values are also stored in a pixel cell memory along with data which represents the sharpness or exact position of every pixel used to represent text/graphics images. A fixed number of memory bytes are used in the pixel cell memory to store both the sharpness data and the color value addresses for the multi-pixel area corresponding to the fixed number of bytes. In the event the large color memory becomes full of color values before the entire page has been stored, color values in a default memory are selected and addressed by the data stored in the cell memory. The default memory is much smaller than the main color memory.

Abstract: A raster image processor for an all points addressable marking engine includes a page memory having a data input and a write enable input. Halftone tints are applied to bit maps of objects stored in the page memory by applying a tint bit pattern to the data input of the page memory while a bit pattern representing the object is being applied to the write enable input of the page memory. Prior to applying the object bit maps to the write enable input of the page memory, the object bit maps may be combined with a texture bit pattern or clipped by a window bit pattern.

Abstract: A telecine scanner is selectively conformed to evaluate the dye densities characteristic of either negative or print film. The film is interposed in a light path between a light source and a pickup stage that develops a plurality of color output signals from the light passing through the film. Color channel filters included in the pickup stage have spectral passbands in the respective colors that are broad enough to include the spectral dye densities of both negative and print materials. The scanner sensitivity is further limited to a particular film material by inserting an appropriate shaping filter set into the light path, preferably between the light source and the film, for conforming the peak sensitivity of at least one of the passbands to the peak spectral density of the corresponding dye of the particular film material.

Abstract: In a stimulable phosphor powder diffraction apparatus, a circularly symmetric diffraction pattern is recorded in the stimulable phosphor. The 2-D diffraction pattern is read out, and the resulting signal is processed to produce a 1-D signal representing the average of the 2-D diffraction pattern at points equidistant from the center of the diffraction pattern.

Abstract: A beam splitter for color imaging apparatus is disclosed. The beam splitter comprises two prism elements which are joined together with a dichroic interference filter interposed between the two elements. An input beam to the beam splitter is divided into a first output beam which is reflected from the filter and a second output beam which is transmitted through the filter. In order to provide a beam splitter of a generally triangular cross section in which one of the output beams has the desired spectral content for a luminance channel in the imaging apparatus and the other output beam has the desired spectral content for a chrominance channel, the interference filter is formed of alternate layers of SiO.sub.2 and TiO.sub.2 and is disposed such that an input light beam to the beam splitter has a relatively small angle of incidence on the filter.

Abstract: A pulse generating mechanism, for a photosensitive web-roll mounted for rotation within a light-tight cartridge, comprises a flange on the web-roll; a plurality of activating means on the flange that are equally spaced angularly from each other and radially from the flange center; and sensing means disposed outside the cartridge for sensing movement of each activating means therepast, upon incremental rotation of the flange and web-roll, and for generating pulses in response to said sensing for monitoring quantity of web remaining on the web-roll. Each activating means preferably comprises a ferromagnetic or electrically conductive element on the flange, and the sensing means preferably comprises a transducer for sensing presence of that element. The element can be a ferromagnetic or electrically conductive disc affixed to the flange or spaced bosses on a flange made of ferromagnetic or electrically conductive material.

Abstract: A film cassette comprises a film spool rotatable inside a lighttight cassette shell to thrust a filmstrip coiled about the spool automatically to the exterior of the shell, and a film exposure status indicator movable from an unexposed position for providing a visible indication that the filmstrip is unexposed to respective partly exposed and fully exposed positions for providing visible indications that the filmstrip is only partly exposed or is substantially exposed. According to the invention, the spool and the status indicator include engagable means for moving the status indicator to its exposed position from its unexposed and partly exposed positions only in response to rotation of the spool.

Abstract: A tele/pan camera is provided with automatic means cooperating with exposure control circuitry to reduce blur in a portion of an exposed frame coded for subsequent pseudo format enlargement, for increasing the normal shutter speed, with corresponding adjustment of other exposure parameters, in response to selection of the pseudo format.

Abstract: Disclosed are blends of about 99 to about 10 weight % of poly(ethylene terephthalate) and about 1 to about 90 weight % of a polyester of trans-4,4'-stilbenedicarboxylic acid and at least one aliphatic glycol having 2 to 16 carbon atoms. The blends have improved gas barrier properties and improved chemical resistance.

Abstract: A cartonless recyclable package for protectively enclosing a product, such as photographic film, comprises a recyclable plastic container and mating cap with recyclably compatible plastic labels thereon bearing product information. One such label on the cap has readily tearable tab portions extending therefrom and tautly secured to the container, to tear apart when the cap is first removed. A second label, secured to the container and overlapping the tearable tab portions, includes inner and outer sheets separably adhered together. The outer sheet can be peeled back to reveal information on the interfacing surfaces of both sheets, and then re-adhered to the inner sheet. A third label, separably adhered to the first label on the cap, may be peeled away and re-adhered to some other surface for reference after the product has been removed.

Abstract: An optical system comprising two plastic elements is suitable for use in very low cost, wideangle cameras having curved image surfaces. This system has low distortion across a curved field angle of 65 degrees or more.

Abstract: By waiting until an amplitude signal from a recorded track undergoes a predetermined change from an observed maximum signal level, the maximum level is "validated" as a signal peak representative of track center. The amplitude signal is generated as a transducer moves radially across a rotating disk and crosses one or more concentric information-bearing tracks. The amplitude signal is sampled at regular intervals and processed by a software low pass filter. Succeeding filtered samples are compared to find a signal maximum. The maximum level is then retained and each new sample is subtracted from the retained level. When the signal difference exceeds an excursion threshold, the signal maximum is "validated" and the head is moved to track center.

Abstract: The circuit includes a cascaded array of digital circuit blocks that together implement a matrix multiplication in each channel of a color video signal processing system. Each circuit block includes two registers for multiplying or dividing two input digital signals by respective powers of two according to programmable bit shifts. The resultant signals are arithmetically combined according to a programmable arithmetic function to provide an output signal. By mask programming the arithmetic function and the bit lenghts of the shifts for each block and by cascading the programmed blocks, the multipler coefficients of the matrix are established and the output signal represents a specified color matrix operation.