Abstract: An apparatus which provides for a constant center distance between all drive components in a hot roll fusing assembly during fusing nip opening/closing. This apparatus includes a roll closure device which utilizes a high mechanical advantage toggle mechanism in conjunction with a cam drive. The toggle mechanism is comprised of a pivot arm pinned to the fuser frame and a force-cell attached to the pivot arm and the shaft through the backup roll. The backup roll is constrained to rotate about the cam shaft. When the cam rotates, it rotates the pivot arm, which in turn drives the backup roll either towards or away from the hot roll while maintaining a constant center distance between the backup roll center line and a center line through the cam shaft. The drive means for the backup roll includes a first gear drivingly coupled thereto which rotates on the same axis and which meshes with a second gear rotating on the same shaft as the cam.

Abstract: Disclosed herein are four embodiments of a system specifically applicable to the hemodialysis procedure. Two embodiments, configured as single pass and recirculating dialysate systems, control ultrafiltration rate to a preset value and measure ultrafiltration rate and the total quantity of ultrafiltrate removed. These embodiments are useful when the filtration characteristics of the dialyzer, i.e., semipermeable membrane, are constant and known. However, when the filtration characteristics of the dialyzer, i.e., semipermeable membrane, are not constant and known, two other embodiments, configured as single pass and recirculating dialysate systems, control transmembrane pressure to a preset value and measure ultrafiltration rate and total quantity of ultrafiltrate removed. All embodiments are closed systems requiring sealed dialyzers. Each of the foregoing systems include, inter alia, a unique flow measurement pressure control unit which controls fluid pressure and simultaneously meters fluid flow therein.

Abstract: An automatic format control for controlling text format upon playout from a text buffer loaded from segmented media, such as magnetic cards. At the beginning of a job and during input keying, format information made up of tab set locations, a measure length, index values, adjust modes, etc., is stored in a text buffer. The keying of this information causes appropriate printer format control settings. Text to be formatted and controlled by the printer according to this format information is then keyed and stored in the text buffer. A later change in format for the same page of the job is handled by keying new format information. This results in new printer tab, etc., settings. This new format information is also stored in the text buffer. Upon later recording onto a magnetic card, all format information is stored on the card along with the text. Also, the last format information recorded on the card is written into a format buffer.

Abstract: An improved method and apparatus for determining the speed and position values of a stepping motor for controlling or regulating the same. These values are derived from induced voltages within the bifilar windings of the stepping motor combined with voltages across and currents through the same bifilar windings. The speed values are derived from the amplitude of the induced voltages and the position values are derived from the zero transitions of the induced voltages. A desirable advance of the motor is distinguished from an undesirable oscillation of the motor by determining whether the induced voltages in the bifilar windings become zero simultaneously.

Abstract: A method and apparatus is shown for improving the clarity and character density on a cathode ray tube (CRT) display in which characters are formed row by row from discrete character elements in row and column coordinate matrices. Unblanking signals form the discrete character elements no less than two matrix spaces wide every time an unblanking signal is applied. This technique results in a much crisper appearance to the characters on the screen and permits as many as 128 characters per line using a low cost commercially available television (TV) monitor. A random access storage is used to store dynamically the addresses of positions (locations) of a read only store corresponding to characters to be displayed. The read only store (ROS) contains indicia corresponding to the discrete character elements of a plurality of characters, one set of indicia for each character in the desired character set.

Abstract: Disclosed herein is an improved pulse width modulated (PWM) voltage regulator-converter system which can function, alone, as a switched voltage regulator system or in combination with a switched power converter, synchronized therewith to form an improved voltage regulator-converter/power converter system. In the pulse width modulated voltage regulator-converter embodiment of the invention, secondary windings of a "current mode" regulator-converter interstage transformer are coupled to regulator-converter power transistors in a push-push circuit configuration. Signals generated by a system clock means and an error signal, derived from the output of an averaging filter, drive a pulse width modulated control means connected to the primary windings of the regulator-converter interstage transformer to thereby increase the maximum regulated output voltage of the voltage regulator-converter system after conditioning in the averaging filter.

Abstract: A spherical wasp-waist shaped contour is formed on the surface of a magnetic head by rotating a lap plate against a single contact point on the head surface at a time. An arc along the head's length is defined by a fixed longitudinal radius. For each increment along the longitudinal arc, a different arc transverse thereto is defined by a variable transverse radius. The point of contact between the head and the lap plate moves along each transverse arc in sequence from one end of the longitudinal arc to the other and back again until the desired shape and depths are achieved. The longitudinal radius is fixed by the spacing selected between the lap plate on one side of the head and a longitudinal head rocking axis on the other side of the head. The transverse radius is determined by the spacing chosen between the lap plate and a transverse rocking axis placed on the same side of the head as the longitudinal rocking axis.

Abstract: In an ink jet printer solid impurities contaminating recirculating ink are removed by subjecting contaminated ink to ultrasonic energy for forming an aerosol of the ink. The aerosol of ink is entrained in an air stream and carried to impactor means where the ink aerosol is caused to return to a liquid state.

Abstract: An efficient converter of photon energy to heat has been devised comprising a dense array of metal whiskers grown with spacings between the whiskers of a few wavelengths of visible light. The material selected, and tungsten is exemplary of such materials, has low emissivity, but achieves significant optical absorption by trapping the light impinging on the dense array by a geometric maze effect. The characteristics of the surface are excellent for the conversion of solar energy to heat.

Abstract: A hopper mechanism comprising a hopper front panel and a back shoe horizontally sideable with respect to a hopper base together forming a hopper into which a horizontal deck of document cards may be placed; a belt extending around a pick roll moveable through the front panel for picking an end card in the hopper and driving it downwardly through a throat gap disposed in the hopper base; a relatively large diameter roll supporting the belt and forming a nip with the belt into which the picked document card moves from the throat gap for reversing the direction of movement of the card from vertical to horizontal; a registration arm swingable by the card as it passes out from engagement with the large diameter roll and belt for sensing the position of the card; and a reversely rotating roll coacting with a roller carried by the registration arm for moving the card backwardly, after the card has cleared the registration arm, into contact with a card abutting registration edge of the arm for providing a registered

Abstract: The print convention apparatus and method disclosed herein effects a decision making process with respect to a determination as to whether an alphabetic character field output from an optical character reader (OCR) is related to the OCR scan of an upper case or a lower case inscription on the document scanned. The alphabetic character field (e.g., a word) is comprised of one or a series of alphabetic characters which represent the OCR's interpretation of characters printed on the scanned document. Each word output by the OCR corresponds to a field (i.e., word) of characters imprinted on the scanned document.

Abstract: Apparatus for high frequency alternating electric field charging of aerosol particles in the form of an ink mist which may subsequently be used for ink mist printing. A charging electrode excited by a high frequency alternating voltage source is used to produce a charging field. The charging field produced by the high frequency A.C. voltage is maintained at a predetermined frequency to avoid attracting the charged particles to the charging electrode, thereby avoiding precipitation on this electrode and allowing substantially higher voltages to be applied to the charging electrode.

Abstract: A multi-channel multi-genre character recognition discriminator is disclosed which performs the decision making process between strings of characters coming from a multi-channel (i.e., three or more channels) alpha-numeric output optical character reader (OCR) system for use in such applications as, for example, text processing and mail processing. The multi-channel output OCR uses separate recognition processes for each genre or character set indicative of a distinct group with respect to style (i.e., font) or form, and attempts to recognize each character independently as belonging to each respective genre.

Abstract: Apparatus in a disc dictation system for concurrently ejecting a disc from the record/playback station into the unload station and loading a new disc from the load station into the record/playback station. The apparatus includes a carrier member which is movable from a preset home position below the load station, through the record/playback station, to the unload station. Attached to the carrier member are an ejector which disengages the used disc from the record/playback station and a picker which selects a new disc from the load station. The ejector and the picker are carried by the carrier member through its motion and respectively transfer the used disc to the unload station and transfer a new disc into the record/playback station.