Abstract: A data compression system which generates several types of symbols from bands of data derived from the digital image. Each group of data bits located in the same bit position across the data band is represented by a mode symbol, which signifies the decimal value of the binary combination of the data contained in that group. The mode symbol is followed by a run symbol, which represents the number of times or incremental positions that the same mode occurs successively until a different mode is generated. Mode and run symbols are transmitted in alternation, with each mode symbol followed by its corresponding run symbol, to an encoder, which generates variable length code words that are transmitted to a receiving station and decoded to provide symbols which are used to form a facsimile image. In one embodiment of this system, the mode and run symbols are combined to form a different type of symbol, known as a ternary octade symbol, to further improve the compression performance of the system.

Abstract: A method and apparatus for removing erroneous data elements from digital images by systemically moving a window memory over the entire area of an image. Each data element in the image is examined with respect to neighboring elements by comparing the contents of the window with a set of masks to determine if a certain data element should be altered.

Abstract: A high speed shift register device includes first and second shift registers. Odd numbered bits of a word are stored in the first shift register and even numbered bits of the word are stored in the second shift register. The first shift register is clocked by a clock signal, and the second shift register is clocked by the complement of the clock signal. The outputs of the first and second shift registers are alternately shifted by means of a multiplexer to an output conductor. A control input of the multiplexer is connected to the clock input. Data is shifted out of the multiplexer at a rate which is twice the normal shifting rate of each of the first and second shift registers.

Abstract: A prescored ceramic substrate plate is broken along each of a plurality of parallel, uniformily-spaced transverse score lines scribed therein by moving the plate, scored side up, along a guide rail and over a break edge into the lower arc of a resilient break roller which is free to rotate. First and second idler rollers apply pressure to the remaining portion of the plate as the plate is being moved. The break roller is canted in the X-axis at a predetermined angle with respect to the break edge for applying a graduated downward pressure onto the plate against the break edge. This angled orientation of the break roller to the break edge sequentially causes the plate to fracture incrementally along each score line as that portion of the plate located at the previously adjacent score line moves into the break roller.

Abstract: There is provided for use with a conveyor, an unloading apparatus for automatically removing a stack of sheets from a succession of shelves or bins, as in a collator, and conveying it to a desired location. The unloading apparatus includes a gripper which is adapted to advance to grip the sheets as presented on a shelf and then retract to insert the stack of sheets onto a conveyor, e.g. a tape conveyor. The gripper includes a four-bar linkage whereby the upper one of its jaws is elevated from a position beneath the plane of travel of the stack of sheets into gripping relation with the stack by a spring biased over-center action. The gripper with the stack is moved linearly onto the conveyor which takes over from the gripper to continue the movement of the stack of sheets. At the delivery end of the gripper stroke, the four-bar linkage is actuated in an opposite direction, the stack released, and the upper jaw retracted out of the path of the stack.

Abstract: A refilling device incorporated into mechanical ventilator machines as used in medical systems wherein a funnel is incorporated into the molded cover of a humidifier chamber. A lower portion of the incorporated funnel when attached to the humidifier chamber, defines a high fluid level at its narrow cylindrical dimension while the upper, wide cone-like dimension is covered by being fitted with sealing filler cap.

Abstract: A lithographic ink and moisture control system is provided for maintaining copy quality over a wide range of operating and environmental conditions without special operator assistance. The control system, among other things, adjusts the ink and moisture feed rates to compensate for predicted changes in master conditions associated with the absorption of moisture by the master during the course of a copy run.

Abstract: The description deals with a process of duplicating page order sheets designed to greatly augment the output of existing office duplicators by preparing masters each of which carries the image of two pages of data. The master is placed on the cylinder with the page lengths axially disposed and the page widths peripherally disposed, and prints on long sheets each of which carries two pages of data side by side, each being placed in successive pockets of a collator. The stack of printed sheets in each pocket is then placed in a paper stack cutter and cut into two stacks of standard sized sheets. The present invention relates to the discovery that a certain page order sequence of originals can be devised which will allow the whole process to proceed in an orderly routine manner, materially simplifying the procedure for the operator.

Abstract: There is provided an improved automatic recirculating duplicator adapted for duplicating from a master or plate selectively onto one or both sides of paper sheets. It is characterized by a single printing couple. Sheets are fed from a paper table to a printing nip between a printing cylinder and an impression cylinder for printing on the first side and, through operation of a controlled gripping and stripping apparatus, the sheets are turned about the impression cylinder for collection with the printed sides down on a paper tray. The paper tray is then shifted to the feeding location normally occupied by the paper table, and the gripping and stripping apparatus is reset for feeding the sheets, now printed on both sides, directly to an exterior receiver.

Abstract: A non-aqueous polymeric dispersion of a methacrylic polymer in a non-aqueous continuous phase comprised of a mixture of organic liquids, one of which is an alcohol, when applied to a suitable substrate, dries to produce a clear, glossy film.

Abstract: A non-aqueous polymeric dispersion of an acrylic or methacrylic polymer in a non-aqueous continuous phase comprised of a mixture of organic liquids, one of which is an alcohol, when applied to a suitable substrate, dries to produce a matte or low gloss coating which can be converted to a glossy coating by heating.

Abstract: The device shown is a dual purpose unloader for the sheet holder bins of a paper distribution system, such as a collator. The bins of a collator are sometimes sloped to allow gravitational settling of the sheets as they are fed into the pockets. The illustrated unloader is an elongated open channel with an internal slidable rod. One set of grippers is mounted on the open channel and another set of grippers on the rod. A spring urges the two sets to move into a gripper closed position, and manual handles provide a means for opening the set of grippers. A mounting frame is available for guiding the unloader into proper registration with the collator pockets if manual placement is not convenient or desired.

Abstract: A method of making a reproduction of a graphic original using high output electrostatic reproduction equipment which utilizes photoconductive members that are each developed in sequence using a developer mix and wherein the longevity of said developer mix is affected by the stress to which it is subjected in the environment of said high output equipment, said method comprising the steps of:Applying a blanket electrostatic charge to said photoconductive member;Exposing said charged photoconductive member to a pattern of light and shadow to produce an electrostatic latent image thereon; andApplying a developer mix which is resistant to the stress of said high output equipment, which mix is drawn from a supply source and applied to said electrostatic latent image, said developer mix comprising carrier particles having an average particle size within the range of 25 to 500 microns, pigmented thermoplastic toner particles, and from about 0.005 to about 1.

Abstract: A pressure roll assembly for applying pressure forces to sheet material articles being driven by a conveyor. A pressure roll is mounted for rotation about a central axis. A longitudinally extending leaf spring has a first portion which supports the pressure roll for rotation about its central axis, and a longitudinally spaced second portion which is fixedly connected with a support member so that the leaf spring supports the pressure roll in a cantilevered condition. An axially extending shaft is disposed normal to the longitudinal axis of the leaf spring and is fixed to the support member. Means are provided for guiding the shaft for axial movement and for restraining movement of the shaft transverse to its axis. Means are further provided for adjusting the axial position of the shaft for adjusting the pressure in the nip between the pressure roll and the conveyor surface.

Abstract: There is provided a corona filament assembly which is characterized by parallel rails each having a plurality of binding posts secured thereto. Each post is formed of a button about which the filament turns and having a lip spaced from the rail and an O-ring gripping element compressibly coacting between the rail and the lip to hold the filament. The filament is wound about the binding posts in a serpentine manner and tightly retained by the O-ring.

Abstract: A series of chelated diketones in which the chelated atom is aluminum can be used as acceptor type sensitizers and plasticizers for polymeric photoconductors of the donor type used in electrophotography.

Abstract: A developer apparatus is provided for developing exposed diazotype copy sheets comprising an applicator roller, means for supplying liquid developer to the applicator roller, a metering blade for wiping excessive liquid from the applicator roller and a pressure blade for pressing a copy sheet against the surface of the applicator roller to transfer liquid from the applicator roller to the copy sheet to develop an image thereon. The metering and pressure blades are arranged for sliding movement between an inoperative position ineffective to develop the copy sheet and an operative position in pressure engagement with the applicator roller for developing the copy sheet. Cam and linkage control means is provided for sequentially moving the blades between the inoperative and operative positions under control of a manually operable actuating means.

Abstract: A lithographic ink and moisture control system as provided for maintaining copy quality over a wide range of operating and environmental conditions without special operator assistance. The control system, among other things, adjusts the ink and moisture feed rates to compensate for predicted high moisture conditions which occur at several short copy runs, wherein significant moisture is introduced with each new master.

Abstract: A microfiche carrier is provided comprising a carrier of transparent sheet material having a strip of pressure sensitive adhesive thereon for securing a microfiche to one face of the carrier. The microfiche carrier is adapted to be stacked with other microfiche carriers to form a deck, and the deck is placed into a magazine from which selected microfiche may be partially withdrawn for viewing a particular frame or frames of the microfiche. The microfiche carrier also includes detent means for releasably retaining the microfiche carrier in the magazine, coding means for retrieval of a selected microfiche carrier from the magazine and ramp means to prevent edge interference with adjacent carriers and microfiche in the magazine when a selected microfiche carrier is retrieved from or returned to the magazine.

Abstract: A lithographic ink and moisture control system is provided for maintaining copy quality over a wide range of operating and environmental conditions without special operator assistance. The control system, among other things, adjusts the ink and moisture feed rates upon machine start up to compensate for moisture evaporated from the system during shutdown.