Abstract: Organic photoconductive elements with a charge generating layer and a charge transport layer carried on an electroconductive support are disclosed. The invention involves the combined use of a mixture of a polyester having a Tg (glass transition temperature) larger than about 60.degree. C. with a polyester having a Tg smaller than about 30.degree. C. in the adhesive bonding layer on the electroconductive support and in the charge transporting layer to provide a receptive and retentive base layer for the charge-generating layer.

Abstract: A high ratio speed reducer comprising a rotatable input shaft operatively coupled to an output shaft which rotates at a reduced speed in response to rotation of the input shaft. An output sprocket is mounted on the output shaft for rotation therewith, the output sprocket having a circumferential perimeter including a number of teeth. A drive sprocket having a circumferential perimeter including a number of teeth differing by at least one tooth from the number of output sprocket teeth is rotatably mounted with respect to an eccentric end portion of the input shaft and orbits as the input shaft is rotated. Successive segments of the drive sprocket perimeter continuously move outside the output sprocket perimeter as the drive sprocket orbits to advance an endless double chain engaging both sprockets.

Abstract: A bipolar driver controls the operation of a reversible polarity load such as a motor. The driver links one terminal of the motor with either a positive or a negative potential power supply in response to processor command signals comprising a combination of logic levels appearing at a pair of driver input lines. The input lines are monitored to detect the presence of an illegal code combination which would otherwise function to simultaneously interconnect the load terminal with both positive and negative power supplies. The load terminal is linked to the power supplies by a separate power transistor for each power supply. Each power transistor is biased into conduction through a drive transistor. Upon detection of an illegal code, monitoring logic generates a signal which interrupts the emitter circuit of each of the drive transistors to inhibit both power transistors.

Abstract: Novel radiation-curable, liquid vinyl organosilicon polymers and coating compositions which are free of volatile solvent(s) and which are adapted to be applied to a substrate and cured rapidly by exposure to radiation to form release coatings having good release properties with respect to adhesives, and methods for producing such polymers and compositions and for applying and curing such release coatings.

Abstract: An apparatus for use in an ink jet recording device or printer for cleaning or protecting the nozzles in a writing head is disclosed. The apparatus comprises rotatably mounted supply and take-up reels; a movable absorbent cleaning belt extending from the supply reel to the take-up reel, the belt including a plurality of embossed elements and a plurality of openings positioned in sequence along the belt for being brought into contact with the nozzles; and a sensor for sensing the positioning of openings in said belt over said nozzles and thereby controlling movement of the belt to permit the embossed elements to be drawn across the nozzles to clean ink and impurities therefrom until the next openings are positioned over the nozzles whereby the sensors cause the belt to cease movement and permit the ink jet writing heads to print through the openings.

Abstract: A heated fuser roll for use in a fuser apparatus for fixing toner images to a support surface is disclosed. The fuser roll includes a sleeve member having two heating units positioned within the member. Each heating unit includes a plurality of heating elements formed of a semiconducting ceramic material having a positive temperature coefficient of resistivity and exhibiting a Curie temperature transition point at which the resistance of the material increases with increasing temperature. The heating units are separated from each other by an insulating member. The fuser includes a thermally sensitive switch for controlling power to the heating elements when starting the fuser from a cold state. The switch is adapted to electrically connect the heating units in series when power is first applied to the fuser and then electrically connect the heating units in parallel when the heating elements are heated to the Curie temperature.

Abstract: Dual layer organic photoconductive elements which are stable and sensitive over a broad range of the spectrum, including near the infrared band, and the process for preparing same. The charge-generating layer comprises a mixture of a charge-generating dye, such as a diane blue dye, and a squarylium dye as a near-infrared sensitizer.

Abstract: The present invention relates to ink supply system for an ink jet printer comprising a primary ink supply source and a secondary or temporary ink supply reservoir connected in series to an ink transfer conduit which delivers the ink upon demand to the ink jets of the print heads. The secondary ink supply reservoir comprises a thin flexible membrane which serves as the upper surface and which expands or contracts depending upon the amount of ink present in the reservoir. The presence of a proximity device senses the movement of the flexible membrane so as to monitor the quantity of ink present in the reservoir. The secondary reservoir acts as a static pressure regulator for ink entering the ink jets.

Abstract: An apparatus is described for delivering ink to an array of impulse ink jet heads some of which may be at different vertical locations. A flow of ink is established along a supply conduit located vertically below the ink jet heads. Ink feed conduits connect at junctions to the supply conduit to provide the ink jet heads with ink. A plurality of flow impeding devices are employed between the junctions so as to enable the formation of columns of ink in the feed conduits of sufficient height to supply the ink to the impulse ink feed jets. Appropriate spacing of the ink jet heads above the top of the ink columns then provides required small negative ink pressures.

Abstract: An apparatus for use in an ink jet recording device or printer for cleaning a writing head having at least one orifice therein through which ink flows is disclosed. The apparatus comprises a manifold movable in a horizontal direction and including an internal reservoir and a brush formed of a plurality of fiber elements extending from the reservoir through the manifold, the fiber elements being urged into contact with the writing head upon sufficient movement of the manifold; a vacuum system communicating in fluid flow with the reservoir for forming a negative air pressure along the fibers; and an ink collecting chamber for containing discharged ink from the writing head, the chamber communicating in fluid flow with both the manifold and the vacuum system, whereby upon the fibers being urged into contact with the writing head the vacuum system causes ink to flow from the writing head along the fibers and into the collecting chamber.

Abstract: A cold pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a copy sheet has the combination of elements including a first roller rotatably-mounted in the copying machine; a mechanism for driving the first roller; a second rotatably mounted roller in pressure contact with the first roller whereby a nip is formed through which copy sheets being fused pass; and a braking device operatively connected to the second roller for applying a controlled braking torque to the second roller, the torque being of such magnitude sufficient to facilitate the fusing of toner particles into the copy sheet without producing substantially any smudging of these particles, but of a magnitude insufficient to cause skidding of the second roller relative to the first roller.

Abstract: Improvement in the humidity resistance of photoconductive cadmium sulfoselenide (CdSSe) is achieved by soaking commercially available CdSSe in a solution of vinylidene chloride-acrylonitrile copolymer in an organic solvent, followed by removing the excessive solution and then heating the soaked photoconductive material.

Abstract: An ink drop deflector is described for use with ink jet printing devices to deflect, as desired, electrically neutral ink drops ejected from an orifice in an ink jet printing device along a free flight trajectory. The ink drop deflector includes in one form a pair of differently sized electrodes which are positioned adjacent the trajectory near the orifice to create a non-uniform electric field with a sufficient potential gradient to deflect neutral ink drops with a relative low switching voltage. In another form of the invention, a plurality of electrodes are so placed adjacent an ink drop trajectory so as to cooperatively produce an electrostatic ink drop deflection force in a desired direction while cancelling force components in other directions. Several embodiments are illustrated including an array of ink drop deflectors.

Abstract: A pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a copy sheet. The apparatus includes in combination a first roller adapted to be rotatably mounted and driven within the copying machine; an arcuately shaped support member, the inner surface of which is spaced from and lies substantially parallel to a portion of the outer surface of the first roller; and a plurality of second smaller rollers mounted for rolling contact about the arcuately shaped support member, the second rollers and the first roller adapted to form a series of nips through which copy sheets being fused pass.

Abstract: Dual layer organic photoconductive elements which are stable, have good negative charge acceptance and are sensitive over a broad range of the spectrum, including near the infrared band, and the process for preparing same. The charge-generating layer comprises a mixture of a charge-generating diane dye, such as Chlorodiane Blue, and a cyanine dye as a near-infrared sensitizer.

Abstract: An assembly tool upon which a spring is secured for enabling the spring to be inserted within an orifice whose entrance diameter is smaller than the outside diameter of the spring is disclosed. The assembly tool includes (1) a mandrel consisting of a first and second section; (2) a securing device that locks one end portion of the spring to the mandrel as it is positioned upon the first section; and (3) a releasable locking device that is rotatably and slideably mounted upon the second section for securing the other end portion of the spring. Upon securing the ends of the spring in the securing device and the locking device, and rotating the locking device upon the second section of the mandrel, the outside diameter of the spring is reduced. The spring is then inserted within the orifice while it is secured to the mandrel, unlocked and thereby returned to its unwound position, and subsequently released from the mandrel.

Abstract: An improved heated fuser roll for use in a fuser apparatus for fixing toner images to a support surface is disclosed. The fuser roll includes a circular sleeve member having at least one heating unit positioned within the sleeve member. Each heating unit includes (i) a plurality of axially disposed thermally conductive members each formed of a chordal section having a curved surface positioned in contiguous relation to the inside curved surface of the sleeve member and a substantially flat surface, (ii) a plurality of wafer shaped heating elements formed of a semiconducting ceramic material having a positive temperature coefficient of resistivity and exhibiting a Curie temperature transition point at which the resistance of the material increases with increasing temperature, and (iii) resilient means. Each of the heating units is separated from each other by an insulating member.

Abstract: A heated fuser roll for use in a fuser apparatus for fixing toner images to a support surface is disclosed. The fuser roll includes a circular sleeve member having at least one heating unit positioned within the sleeve member.

Abstract: A device capable of controlling and maintaining the temperature of water discharged from a kitchen faucet or shower at a preselected temperature level. An air-filled enclosure disposed within a mixing chamber regulates the precise amount of hot and cold water entering the mixing chamber as a function of the rate of thermal expansion of the air. A selector control is provided to set the preselected temperature level.

Abstract: A powder metal composition containing 1.0-2.5% Ni, 0.3-0.7% Mo, 0.15-0.30% Mn, 0.5-1.5% Cu, 0.3-0.7% C, 0.50-1.0% zinc stearate, the balance being Fe.