Abstract: A charge amplifier includes an operational amplifier having first and second voltage dividers across its output connected to a capacitor and a resistor, respectively, in an R-C network returned to one input for magnifying the apparent value of the impedance of the capacitor and of the resistance of the resistor. Its output is also connected to an integrating network including another operational amplifier having its output supplied to a third voltage divider supplying signal to another input of the first operational amplifier. A pair of differentially coupled piezoelectric charge sources supply signal to the amplifier through filters and the second voltage divider has a portion shunted by a parallel connection of back-to-back diodes and another resistor for effectively attenuating response to low frequency signals.

Abstract: A high pressure bidirectional flow throttling valve includes a pair of rotatable throttling discs mounted in a cavity for slight lateral movement in the flowpath. The operating mechanism for rotating the discs includes a toggle arrangement located outside the flowpath.

Abstract: A sheet unloading device for use in a printing or duplicating machine, or the like, wherein sheets are delivered seriatim to a receiving tray whereat the sheets are deposited onto the top of a stack of sheets in the tray. An interposer mechanism is movable to an operative position at the end of the tray for dividing the tray into a first, lower portion and a second, upper portion. The interposer mechanism permits removal of the lower portion of the stack while sheets are continuously delivered to the upper portion of the stack. A back stop is provided at the end of the tray and can be selectively lowered to permit removal of the lower portion of the stack of sheets.

Abstract: A sheet material feeding mechanism for use in a duplex duplicating machine. A pressure roller extends laterally across a sheet path for engaging the blank side of a previously imaged copy sheet. A feed roller assembly forms a nip with the pressure roller through which the sheet is fed. The feed roller assembly includes a pair of feed rollers mounted on the outside of a pair of support members for positioning the feed rollers near the marginal edges of the sheet to preclude tracking the imaged side of the sheet. The feed rollers are axially adjustable for accommodating different sheet sizes.

Abstract: A fluid valve capable of operation in high pressure, bidirectional flowpaths includes a chamber having a circular port in which an axially and radially movable seat ring is engaged by an eccentrically movable valve plug having a spherically convex sealing surface. The plug is mounted to a valve shaft supported in the body for rotation about an axis transverse to, but offset from, the centerline of the port. The seat ring, body and a retainer ring include among them a pair of annular channels for retaining a pair of seals adapted for improving their sealing action with pressure.

Abstract: A magnetic toner developing device for developing images on a photoconductive sheet. The device includes a magnetic developer roller brush for applying a single component toner to the sheet. An electrically isolated guide plate extends beneath the developer roller brush in close proximity thereto and supports the sheet in its travel through a development zone formed between the developer roller brush and the guide plate. The guide plate is electrically isolated from a support frame to eliminate electrostatic clamping of the sheet to the guide plate.

Abstract: A sheet handling mechanism for use in a duplicating machine for duplicating images on both sides of copy sheets including a first printing couple, having an impression cylinder, for transferring a first image to a first side of a copy sheet and a second printing couple for transferring a second image to a second side of the sheet. Mechanism directs each sheet issuing from the impression cylinder in a path away from the first printing couple. Mechanism engages a lead end of each sheet issuing from the directing mechanism and diverts each sheet generally transversely out of the path toward a reversing station. Re-feeding mechanism at the reversing station engages the lead end of the sheet and re-feeds the sheet, trail end first, back into the path whereby the trail end becomes a new lead end of the sheet. Transport mechanism engages the new lead end and transports the sheet toward the second printing couple.

Abstract: A positioner-actuator control system includes a pair of relays and a pivotally mounted beam for operation thereof in response to a pneumatic control signal. A summing beam has forces applied to it from an input signal, a controlled device position lever, a zero adjustment and a damping mechanism comprising a pair of flat springs attached to the relay beam and to the summing beam. A clamp is movable along the flat springs to permit user adjustment of the damping force.

Abstract: A mechanism for registering sheets in a printing or duplicating machine which includes a conveyor board for delivering the sheets seriatim to the registering mechanism. A stop guide is mounted on a fixed support of the machine at one side of the conveyor board. A jogger guide is mounted on a jogger device of the machine at the opposite side of the conveyor board. The jogger guide includes a spring loaded blade for acting against a side edge of the sheet to move the sheet laterally to engage an opposite side edge of the sheet against the stop guide. The spring pressure of the blade is adjustable to accommodate sheets of varying weight, and the blade is provided with floating movement to accommodate sheets which are skewed or out-of-square. A calibrated dial is employed for incrementally adjusting the location and spring pressure of the blade. The stop guide and jogger guide are easily converted for left hand or right hand jogging, or vice versa, without removing either guide from the machine.

Abstract: A common filter for one or more deep fat fryers includes a nozzle in the bottom of each fryer vessel for delivering filtered fat in a non-aerated whirlpool-like flow for flushing dislodged food particles through a drain to a portable filter tank. A pump delivers filtered fat from the filter tank to the nozzle for cleaning and refilling of the vessel.

Abstract: An aqueous diazo coating composition is disclosed to be used in accordance with an alkaline vapor development system, containing a hydrolyzed resin together with a diazo light-sensitive compound, coupling agent and stabilizing materials. The aqueous diazo coating composition of the present invention provides a method of fabricating a light-sensitive diazo member for use in combination with a development system utilizing alkaline vapors which excludes the use of organic solvents.

Abstract: Registration is maintained as between an electron beam and that portion of a light-emissive interface selected for visualizing beam-defined characters by providing a discernible indicium on the interface at a location exterior to the selected interface portion and interacting the beam with interface area inclusive of the indicium. Signals are generated by a detector viewing such interface area and information for correction of beam deflection is obtained from the signals.

Abstract: In a duplicating machine for duplicating images on both sides of copy sheets including a blanket cylinder and an impression cylinder, a mechanism for handling the sheets and re-feeding the sheets back to the impression cylinder for duplex copying. The blanket cylinder has first and second images transferable to the copy sheets. The impression cylinder forms a nip with the blanket cylinder for transferring the copy sheets through the nip. A first gripper on the impression cylinder releasably engages a lead end of a copy sheet and moves the sheet through the nip to transfer the first image on a first side of the sheet. A chain gripper releasably engages the lead end of the sheet transferred thereto by the first gripper and transports the sheet away from the impression cylinder. A swing gripper releasably engages a trail end of the sheet in timed relation with release of the sheet by the chain gripper and re-feeds the sheet back to the impression cylinder.

Abstract: A method is disclosed for preparing an oleophilic drafting film and related light-sensitive reprographic member. An aqueous drafting composition is disclosed which is both compatible with hydrophobic material and diazo light-sensitive compositions which provides for an expedient method of fabricating drafting film. The drafting composition comprises an acrylic resin emulsion containing an aziridine hardening agent.

Abstract: An improved process for preparing a single component toner or developer composition is disclosed whereby toner fines are removed from the composition prior to the addition of conductive carbon followed by a reclassification step to remove excess carbon particles, i.e., those carbon particles not attached to the toner.

Abstract: A single component electrophotographic developer composition is disclosed comprising a low melt viscosity polyamide resin and a magnetic oxide component of such particle size as to greatly enhance the development of low background high density images. Highly conductive carbon may be added to control the resistivity of the developer particles.

Abstract: A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the disclosed novel developer composition, a high quality lithographic master can be fabricated. The novel developer composition comprises a low melt viscosity polyamide resin, a magnetic oxide component and a conductive carbon pigment.

Abstract: A magnetic toner developing system has a hopper feeding magnetic toner to a magnetic roller brush positioned over a non-magnetic guide that supports a sheet in its passage through a development zone. A plurality of magnets are mounted beneath the guide and restrain any toner on the underside of the sheet from being carried away from the development zone. The stronger magnetic field of the developer brush attracts the restrained toner as the sheet is transported out of the development zone.

Abstract: A pressure fixable toner for electrostatic image development, which can be fixed upon a receiving member by pressure, is formulated with a high density, low molecular weight polyolefin, one or more coloring agents, and optionally, other adjuvants.

Abstract: A pair of ECG cable sets are adhesively secured to disposable body electrodes, and also plug into a junction box which in turn is connected to an ECG machine. Each cable set is formed by printed circuit techniques. A pair of flat support sheets of insulating material are glued together. Signal leads formed of conductive ink are printed on the interior surface of one of the support sheets, and shielding layers also formed of conductive ink are printed on both exterior surfaces of the support sheets, thus forming a flat, flexible sandwich structure which resists entanglement. Entanglement is further minimized because the individual branch leads of each cable set merge into a common truck. The cable sets terminate in the printed circuit connectors which plug directly into the junction box, and the latter has clamping mechanisms to secure the connectors in place. A flexible housing surrounds the junction box terminal board, and permits the clamping mechanisms to be operated by squeezing the housing.