Abstract: The present invention is directed towards an apparatus for testing hydraulic components. The apparatus includes a test fixture for housing a hydraulic component to be tested, a first fluid reservoir containing fluid substantially free of contaminants, contaminant monitoring and pressure monitoring systems for monitoring the respective contaminants at, and the pressure drop across, the inlet and the outlet of the test fixture. The apparatus includes a plurality of second fluid reservoirs. Each second fluid reservoir can contain a slurry consisting of a known volume of fluid mixed with a charge of contaminants of known mass and can discharge this contaminant slurry into the inlet of the test fixture. Each second reservoir can be filled with fluid from the first fluid reservoir. One second reservoir can discharge its contaminant slurry into the inlet of the test fixture while one or more other second reservoirs receives fluid from the first reservoir.

Abstract: An apparatus for testing the ability of a filter to filter contaminants, by automatically controlling and/or monitoring various parameters, including the following, among others: the flow of fluid through a test filter; the rate of injection of contaminants upstream of the test filter; the variation in the flow of fluid through the test filter; contaminant particle count upstream and downstream of the test filter; vibration of the test filter; temperature of the fluid flowing through the test filter; and the pressure drop across the test filter.

Abstract: The present invention provides an ink jet printhead that is provided a bias voltage and that includes at least one ink channel, a heating element, and an interconnect. The ink channel has an open end that serves as a nozzle, and the heating element is positioned in the channel for ejecting ink droplets from the nozzle by selective application of current pulses along the interconnect to the heating element. The printhead further includes a conductive protective region that is positioned adjacent the heating element and that has a portion thereof exposed to the ink channel for protecting the heating element from ink. Positioned between the conductive protective region and the heating element is a dielectric region for insulating the heating element from the conductive protective region. The printhead also includes a bus for connecting the bias voltage to the conductive protective region.

Abstract: A fuse link includes a fuse portion and a exothermic charge adjacent the fuse portion for blowing the fuse portion upon application of a triggering current to the fuse link.

Abstract: There is provided a method of managing index entries during creation, revision and assembly of a document. The occurrence of an index entry in the document is defined by a document index node (DIN). The relationship between index entries is defined by an index data structure that consists of heading nodes (HN), with each HN including the title of its associated index entry, and that maintains the relationship between HNs by keeping a record for each HN of the next sibling HN and the first child HN. The method includes first scanning the document for DINs. Next there is determined for each DIN encountered a page instance node (PIN). The PIN includes the number of the document page on which the DIN was encountered, and associates the PIN with the HN by including in the HN a pointer to the PIN, provided the PIN is the first PIN to be associated with the HN. Otherwise, the PIN associates the PIN with the previous PIN by including in the previous PIN a pointer to the PIN.

Abstract: The present invention provides a method of electronic composition for electronically ordering logical pages onto physical pages printed by a printer. The first step is to determine the number of physical pages in a signature, and the pattern in which two or more logical pages will be imposed on the physical page. Based on the pattern, a seed table is selected having an entry for each position of the pattern. The logical pages are then electronically ordered by assigning a logical page to each position of each physical page based on the place of each physical page in the sequence of physical pages and based on the entry in the seed table corresponding to the pattern position contemplated.

Abstract: The present invention is directed to a method for fabricating a monolithic ink jet printhead. The printhead has a substrate with a major surface and a plurality of ink channels formed on the major surface, with the ink channels each having a nozzle at one end and an inlet communicating with an ink manifold at the other end. The printhead has transducers, formed on the major surface and positioned in each ink channel, for creating pressure to move ink through the nozzles. According to the method, first a mandrel of a first metal or metal alloy is formed, on the major surface, that models the ink channels and the ink manifold. Then a first passivation layer is formed on the mandrel and the major surface, and a mandrel cover of a first metal or metal alloy is formed covering the mandrel, separated from the mandrel by the first passivation layer. A nozzle cap is formed over and attached to the mandrel cover by plating the mandrel cover with a third metal or metal alloy.

Abstract: A microelectronic device and a method of forming the same are disclosed. The microelectronic device includes a cathode, an anode and a first grid disposed adjacent a major surface of a substrate. The first grid is positioned between the cathode and the anode. The first grid is formed from conductive material using a sidewall spacer technique. The anode is made of conductive polysilicon, the cathode is made of tungsten and has a portion elevated from the substrate to aid in the ballistic transport of electrons. A second grid is formed using a sidewall spacer technique, and is positioned between the first grid and the anode. The method of making a microelectronic device includes forming an anode and a cathode on a surface of a substrate, then depositing, in series, first and second sacrificial layers. A first wall is formed by removing portion of the second sacrificial layer. The first wal is positioned between the anode and the cathode.

Abstract: A thermal ink jet printer utilizes a printhead whose electrical connections to the heating elements used to expel the ink droplets has been modified to reduce the effects of parasitic resistance of a first power bus when a number of resistors are simultaneously addressed. The first power bus has been modified by forming and interconnecting to it a second power bus using a low resistance connection which is formed to crossover, or under, a common return. The second power bus is connected at each end to a predetermined voltage, while the first power bus is connected at each end through a series ballast resistor to the same predetermined voltage.

Abstract: A method for forming on a substrate a microelectronic device having a first and second element. According to the method, a first conductive layer is deposited on the surface. Next, a cap material is deposited, then the first element and a first element cap are formed from the first conductive layer and the cap material respectively. A sacrificial material is conformally deposited, then a second conductive layer is conformally deposited. The second conductive layer is anisotropically etched to form the second element. Finally, the sacrificial material is anisotropically etched.

Abstract: The present invention is directed to circuitry which uses a reference voltage and a reference current to produce a resistance which stays essentially constant even when the temperature of the device varies. The circuitry of a preferred embodiment consists of a resistor and a n-channel FET. The source of the FET is connected to ground, and the drain is connected to one terminal of the resistor. The other terminal of the resistor is connected to a reference current source and to the noninverting terminal of an operation amplifier. The inverting terminal of the operational amplifier is connected to a reference voltage. The output of the operational amplifier is connected to the gate of the FET. The value of the resistor is chosen such that the voltage drop across the FET (I.e., V.sub.ds) is small so that the FET operates in the linear region. A resistive element is composed of the resistor and the on-resistance of the FET.

Abstract: An operational amplifier comprises two amplifiers of like circuit configuration and complementary conductivity type connected in parallel. Each amplifier includes a folded cascode input section for providing a first stage of amplification, a class A, push-pull output section for providing a final stage of amplification, a bias section for providing bias voltages to the other sections, and a common made feedback (CMF) section. Each CMF section adjusts the output voltage of its associated input stage to the desired quiescent voltage to compensate for any process differences in the input section. To minimize quiescent power consumption, each CMF section and its associated input section are designed to set the quiescent output voltage of the input section to a level that biases the output transistors of the output section at their threshold voltages.