With Testing Patents (Class 177/50)
  • Publication number: 20030061890
    Abstract: A direct and non-destructive method for measuring recess depth in a semiconductor wafer through use of a solvent, comprising:
    Type: Application
    Filed: September 28, 2001
    Publication date: April 3, 2003
    Applicant: Infineon Technologies North America Corp.
    Inventors: Linda X. Chen, Larry Varnerin
  • Publication number: 20030056995
    Abstract: The multiple load sensing multi-load cell scale is described that provides improved utility to scales with multiple decks that share load cells near supports so that more than one load may be determined at the same time on a single scale. In more detail, the scale uses the sectional sensitivities to load movement on the scale decks, load position and individual normalized load cell outputs to provide separate load magnitude measurements on these individual decks. According to the present invention, more than two load cells associated to form a single scale provide outputs that are converted to individual digital representations of the relative force magnitude on each. These magnitudes are related to the effective location of each load cell to provide the load centroid location on the scale when the sum of the products of the effective location and magnitude of each is divided by the sum of the magnitudes.
    Type: Application
    Filed: September 10, 2001
    Publication date: March 27, 2003
    Inventor: Thomas Howard Johnson
  • Publication number: 20030056996
    Abstract: A weight inspection apparatus (J) has an electronic balance (13), a comparator (62) for comparing the weight of the article measured with a predetermined reference weight and outputting a difference between the measured weight and the reference weight. Thus, a determination is made whether the article has a possibility of being defective if the difference exceeds the predetermined allowance value. An abnormal signal-receivers (61b) receives an abnormal signal outputted from the injection molding press. When the abnormal signal is received, it is determined that the article formed in an injection molding operation performed in an abnormal state have a possibility of being defective.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 27, 2003
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventor: Atsushi Uchida
  • Patent number: 6479767
    Abstract: A weighing transducer is secured onto a fixed base. The fixed base is positioned in order to allow the weighing transducer to rest securely over a conveyor belt. An electrically actuated gripper is connected to the weighing transducer allowing the weighing transducer to accurately weigh any item freely suspended from the electrically actuated gripper. The conveyor belt works synchronously with the holding device in order to obtain an accurate weight reading by taking a no load weight reading prior to the weighing of each item to be measured. The conveyor belt delivers an item to be weighed to the electrically actuated gripper which in turn captures the item. When the item is delivered to the electrically actuated gripper, the conveyor belt stops. The item is captured by the electrically actuated gripper and the conveyor belt is lowered to a height sufficient to enable the item to be suspended freely on the electrically actuated gripper.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: November 12, 2002
    Inventor: Heinz P. Zicher
  • Patent number: 6459367
    Abstract: The present automated vehicle regulation compliance enforcing system is comprised of an on-board monitoring system for being installed on a heavy truck, and an interrogation system for being installed in enforcement vehicles and inspection stations. The monitoring system is comprised of a processor connected to speed and weigh sensors installed in the truck and trailers. The processor is arranged to monitor various operating parameters of the truck, such as loading, load distribution, speed, driver maintenance information, driving time, and mileage. The processor is also connected to an interface which enables the truck operator to input driver and vehicle information, and a transceiver for communicating with the interrogation system. The interrogation system is comprised of a processor connected to a transceiver, and arranged to interrogate the monitoring system to download data.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: October 1, 2002
    Inventors: Randall D. Green, Barbara J. Turpel, David L. Turpel, Gary J. Lukas
  • Patent number: 6455787
    Abstract: For avoiding evaporation-related errors in the calibration of a dispenser by weighing liquid units delivered by said dispenser, an absorbent (9) in a weighing vessel (8) is arranged on a weighing pan (2) and binds the liquid units delivered onto said absorbent. To prevent falsifications occurring as a result of liquid being precipitated onto the absorbent (9), the environment of the weighing pan (2) is kept dry by a cylindrical weighing insert (10) put over said weighing pan. Said weighing insert forms a cavity (15) which receives the weighing pan (2) and is accessible from above through a longer channel (16). Both are surrounded by an inner wall (12) made of gas-permeable material, e.g. porous ceramic, through which they interact with a drying agent (18) which fills the intermediate space between the inner wall (12) and an outer wall (11) a distance away from it.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: September 24, 2002
    Assignee: Tecan Trading AG
    Inventor: Nikolaus Ingenhoven
  • Patent number: 6441321
    Abstract: An apparatus and method for continuously producing constant weight portions of semi-solid matter, such as bread dough, from a large mass through a dividing mechanism whereby variations in the weight of each portion are minimized by providing a signal proportional to the weight of a dough portion, or group of dough portions in order to automatically adjust the rate at which dough is fed to the dividing mechanism.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: August 27, 2002
    Assignee: Creative Automation, Inc.
    Inventor: Paul Hebenstreit
  • Publication number: 20020096371
    Abstract: A load receiver (10) for a balance with arms (11) is designed to support weights of various shapes and sizes (13, 14, 15, 16) by cradling the weights in a depression sloped at a variable slope angle towards the middle of the load receiver. A loading stage (1) arranged to cooperate with the load receiver (10) has one or more weight-placement devices (5) designed so that the load receiver (10) can reach through the weight-placement device (5) without touching the latter. The loading stage (1) and the load receiver (10) are moveable up and down in relation to each other. The weight-placement device (5) is suitably configured to support the different weights (13, 14, 15, 16). The load receiver (10) and loading stage (1) are used in a mass comparator for testing weight standards with a high degree of precision.
    Type: Application
    Filed: November 15, 2001
    Publication date: July 25, 2002
    Applicant: Mettler-Toledo GmbH
    Inventor: Rene Weber
  • Patent number: 6396002
    Abstract: The integrity of the contents of containers (such as cartons containing arrays of cigarette packets) is ascertained in an apparatus wherein a continuously or intermittently operated conveyor advances successive containers of a series of such containers onto and beyond a weighing device (such as a strain gage) which transmits signals denoting the weights of successive containers to a circuit wherein such signals are compared with a reference signal denoting the weight of a container having satisfactory contents. If the difference between the weight of a freshly weighed container and a desired or required weight exceeds a preselected value, the respective container is expelled from the path for acceptable containers. The reference signal can be updated upon completed weighing of each acceptable container.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: May 28, 2002
    Assignee: Topack Verpackungstechnik GmbH
    Inventors: Wilke van Hove, Manfred Gebauer
  • Publication number: 20020038567
    Abstract: A balance (1) has a weighing compartment (3) and a balance housing (4). The balance housing (4) contains a weighing cell (15) and forms a rear wall (13) and a floor (8) for the weighing compartment (3). A weighing-load carrier (2) is arranged on a cantilever arm (30) of the weighing cell (15). The cantilever arm (30) also holds a weight-receiving element (6) for calibration weights (7) of a calibration device (5). The weighing-load carrier (2) is releasably attached to a coupling arrangement (11) protruding from the cantilever arm (30) through passage openings (12) in the rear wall (13). The floor (8) extends without openings between the weight-receiving element (6) for the calibration weights (7) and the weighing-load carrier (2).
    Type: Application
    Filed: September 21, 2001
    Publication date: April 4, 2002
    Applicant: Mettler-Toledo GmbH
    Inventor: Paul Luchinger
  • Publication number: 20020023784
    Abstract: The total weight of a plurality of resin products is set as a reference value, and a first upper-limit threshold and a first lower-limit threshold are respectively stored in a control circuit 38 on the upper limit side and the lower limit side with respect to the reference value. A second upper-limit threshold which is yet greater than the first upper-limit threshold and a second lower-limit threshold which is yet smaller than the first lower-limit threshold are stored in the control circuit 38. When the total weight of the resin products is greater than the first upper-limit threshold, a determination is made by the control circuit 38 as to whether or not the total weight of the resin products is yet greater than the second lower-limit threshold. Further, when the total weight of the resin products is less than the first upper-limit threshold, a determination is made by the control circuit 38 as to whether or not the total weight of the resin products is yet less than the second lower-limit threshold.
    Type: Application
    Filed: July 25, 2001
    Publication date: February 28, 2002
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Norikazu Suzuki, Masaki Usui
  • Patent number: 6284986
    Abstract: A method of determining the thickness of a layer on a substrate where the layer is deposited during a semiconductor manufacturing process. The substrate is weighed a first time. The layer is deposited on the substrate and the substrate is weighed a second time. The thickness of the layer is calculated using the difference between the second weighing and the first weighing.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: September 4, 2001
    Assignee: SEH America, Inc.
    Inventors: Gerald R. Dietze, Oleg V. Kononchuk
  • Patent number: 6278067
    Abstract: In a calibration rig for a weighing machine and a method of using the calibration rig, the weighing machine having a load cell including a transducer and headwork connected to the load cell, the calibration rig having a calibration load cell including a low capacity transducer with the excitation voltage and signal connections arranged for connection to the headwork and a potentiometer. The fixed terminations of the potentiometer are connected to respective signal connections and the wiper connection of the potentiometer is connected to one excitation supply terminal via a series resistor.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: August 21, 2001
    Assignee: GEC Avery Limited
    Inventors: Steve R Allen, Peter G Allen
  • Patent number: 6257079
    Abstract: An appliance for testing oblong tablets or tablests with a similar form and more especially for weighing, measuring and fracture testing of such tablets in suitable testing stations, the appliance including a feeder for feeding individual oblong tablets to a weighing device having a weighing pan with a floor in the form of a trough inclined in the conveying direction, and being provided with a conveyor underneath the weighing pan on which conveyor the tablets are deposited with their longitudinal axis parallel to the longitudinal direction of the trough and which conveys the tablets with such alignment through the further testing stations, and in which between the point at which the oblong tablets are transferred to the conveyor and the testing stations, a toppling device is arranged, which topples over any oblong tablets standing on their edges so that the tablets fall onto their round sides.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: July 10, 2001
    Assignee: Erweka GmbH
    Inventor: Werner G. Mueller
  • Patent number: 6210727
    Abstract: A bulk density sampling method and device whereby formed product is flowed through a vertically disposed passage of pre-determined size. The passage is temporarily obstructed to collect and weigh a known volume of product upon which to base a calculation of bulk density and the generation of a control signal for regulating a multi-tasking processor to constantly monitor, control, and display speed, head gap position, temperature, feed rate and target moisture.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: April 3, 2001
    Assignee: American Extrusion International, Corp.
    Inventors: Donovan Z. Miller, Henry Z. Miller
  • Patent number: 6137066
    Abstract: The present invention relates to a method and a device for weighing moving objects wherein at least two measurements are carried out with respect to each object by means of separate weighing machines (1, 2), whereupon an average value is computed by a calculating unit (5) as the result of the weighing operation. The invention is intended for weighing mobile objects, such as vehicles (10) designed for road or rail-bound traffic, or for in-line weighing operations to weigh products on a conveyor belt.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: October 24, 2000
    Assignee: Vagagenturen Wanelid AB
    Inventor: Kent W.ang.nelid
  • Patent number: 6118082
    Abstract: A strain gauge sensor for measuring the unit weight of a moving sliver in a textile machine, comprising a support rigidly mounted on a sliver output end of the textile machine and a trumpet carried by the support for outputting a condensed sliver. At least one strain gauge is carried by the support and responsive to strain imposed on the support by movement of sliver through the trumpet. Electrical circuit is means carried by the support in electrically communicating relation to the strain gauge, and includes a power supply and amplifier carried by the electrical circuit on the support for outputting an excitation voltage and a Wheatstone bridge for receiving the excitation voltage from tile power supply and applying the excitation voltage to the at least one strain gauge, receiving a feedback signal from the strain gauge and outputting a control signal corresponding to the weight of the sliver passing through the trumpet.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: September 12, 2000
    Inventor: Paul Branch Bissette
  • Patent number: 6085979
    Abstract: An off-scale item sensing apparatus and method which uses a light beam around a portion of the periphery of a weigh plate. The system includes a source for producing a light beam, a plurality of mirrors for directing the light beam along a path around a periphery of the weigh plate, a detector for receiving the light beam, and an alarm coupled to the detector for alerting an operator when the item is placed in the path of the light beam.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: July 11, 2000
    Assignee: NCR Corporation
    Inventor: Craig E. Maddox
  • Patent number: 6018129
    Abstract: A strain gauge sensor for measuring the unit weight of a moving sliver in a textile machine, comprising a support rigidly mounted on a sliver output end of the textile machine and a trumpet carried by the support for outputting a condensed sliver. At least one strain gauge is carried by the support and responsive to strain imposed on the support by movement of sliver through the trumpet. Electrical circuit is means carried by the support in electrically communicating relation to the strain gauge, and includes a power supply and amplifier carried by the electrical circuit on the support for outputting an excitation voltage and a Wheatstone bridge for receiving the excitation voltage from the power supply and applying the excitation voltage to the at least one strain gauge, receiving a feedback signal from the strain gauge and outputting a control signal corresponding to the weight of the sliver passing through the trumpet.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: January 25, 2000
    Assignee: M & M Electric Service Co., Inc.
    Inventor: Paul Branch Bissette
  • Patent number: 5938074
    Abstract: A metering device which includes a storage reservoir 3, a volumetric extror 30 introducing roughly gauged batches of material into an intermediate hopper 4, which empties periodically into a weighing hopper 1. Under the latter, rapid stabilization scales 2 record the weight of the batch contained in the weighing hopper 1. The latter is emptied onto a belt 5 at the end of a time interval proportional to the weight of the batch or of one of the preceding batches.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: August 17, 1999
    Assignee: Compagnie Generale des Etablissments Michelin - Michelin & Cie
    Inventor: Yves Dartus
  • Patent number: 5936206
    Abstract: A weighing machine, such as a combinational weighing machine, has scale cells and a plurality of vibration-detecting cells installed on the same floor. The scale cells output weight signals corresponding to the weights of objects being loaded. The mode of vibrations of the floor is detected from signals from the vibration-detecting cells. Vertical displacements of the floor at the positions of the scale cells are calculated therefrom, and their effects are removed from the weight signals. A control device is provided such that the effects of floor vibrations are ignored if they are sufficiently weak.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: August 10, 1999
    Assignee: Ishida Co., Ltd.
    Inventor: Shoko Tajiri
  • Patent number: 5910645
    Abstract: A measuring pick-up or load cell shall be made less sensitive against off-center load applications, if necessary. At least it must be made certain that the off-center load sensitivity is within a permissible tolerance range. For this purpose the sensor body (1A, 1', SB) of the detector (1) to which there is applied at least one pick-up element or strain gage (5), is held for each load application in a different fixed position in a mounting (2) in such a way that, spaced from the clamping position a test load can be applied in a direction deviating from the direction and/or position of the axis of symmetry (CA, AS) of the sensor body (1A, 1', SB). The test loads may be uniform or they may differ for one or more load application points. A respective output signal is measured and correlated to the applied test load. At least one additional test load of the same size is applied in a different load application direction, and the respective output signal is again measured and correlated to the second test load.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: June 8, 1999
    Assignee: Hottinger Baldwin Messtechnik GmbH
    Inventors: Hans-Joachim Gerlach, Heinz Ronald Will, Ralf Waegner, Werner Schlachter
  • Patent number: 5900591
    Abstract: A belt scale calibration system for calibrating a belt scale that is mounted with respect to a conveyor belt. The belt scale calibration system includes a load inducing assembly and a load induced assembly. The load inducing assembly engages the conveyor belt proximate to the belt scale. The load induced assembly is operably connected to the load inducing assembly. Applying a force to the load induced assembly produces a force on the load inducing assembly which the load inducing assembly transmits to the conveyor belt for calibrating the belt scale.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: May 4, 1999
    Inventor: Gary M. Liubakka
  • Patent number: 5877456
    Abstract: There is provided an system and method for calibrating weigh assemblies of bulk material feeders using test chains of known weight and pitch. In particular, the present invention is a calibration checking system for a belt-type gravimetric feeder or conveyor having a weigh span section and comprises a continuous conveyor belt, at least one pair of support rollers and at least one weigh roller. A particular weigh roller is disposed under an upper strand of the conveyor belt and equidistant from each of the support rollers so that they are in planar alignment with one another. The calibration checking assembly also comprises a test chain having a chain pitch that is integrally divisible into the pitch of the weigh span section. In addition, portions of the conveyor belt on both sides of the weigh span are inclined equally at a single particular angle relative to the weigh span section.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: March 2, 1999
    Assignee: General Signal Corporation
    Inventors: John C. Homer, III, J. Ronald Walsh, David P. Ratcliffe
  • Patent number: 5866854
    Abstract: A calibrating device for a balance including a load receiving unit for loads to be weighed, a load measuring unit and a lever mechanism serving for the force transmission between the load receiving unit and the load measuring unit, wherein the lever mechanism is coupled to the load receiving unit through a coupling area on an input side and to the load measuring unit through a coupling area at an output side, and wherein the lever mechanism further includes an additional coupling area, separate from the coupling areas on the input and output sides, for releasably coupling a calibrating force which is uncoupled during the normal weighing operation.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: February 2, 1999
    Assignee: Mettler-Toledo AG
    Inventors: Jean-Christophe Emery, Thomas Glattli
  • Patent number: 5864097
    Abstract: An apparatus for measuring the amount of medication in a sealed metered dose inhaler dispenser comprises a housing in which a mounting platform is located. An aperture in the housing allows the dispenser to be placed on the platform. Displacement of the platform is correlated with the weight of the dispenser and contents. The weight is displayed as an indication of the amount of medication in the dispenser from full to empty. The platform means may rest on a compression spring, the deflection of the spring being correlated with the applied weight. Tabs associated with the platform align with indicia on the exterior of the housing to indicate the degree of dispenser fill.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: January 26, 1999
    Inventor: Frank J. Alvino
  • Patent number: 5861582
    Abstract: A patient weighing system includes novel load sensing casters (12) or load lift modules (92) installed on a hospital bed or other patient housing device. The casters and load lift modules each include pneumatic lifts (54, 106). The lifts are operative to load and unload the weight of the device onto a piezoelectric load cells (60; 150, 152). The load cells are electrically connected to control units (14, 98) which include visual displays (16). In operation, the discharge time constants for the load cells are calculated by first raising the weight of the bed off the load cells with the lifts. Thereafter, the load is reapplied to the load cells by exhausting the air from the lifts. The control unit compensates for the short duration and decay of the sensor signals and sums the weights sensed by the load cells to determine a total weight.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: January 19, 1999
    Assignee: Synapse Technology, Inc.
    Inventors: James R. Flanagan, Patrick Flanagan
  • Patent number: 5844174
    Abstract: An electronic balance with a balance scale (3) which is movably connected by a parallel guide consisting of an upper (4) and a lower guide rod (5) in a vertical direction to a system carrier (1) fixed to the housing, with at least two wire strain gauges (15) which are arranged in the vicinity of the ends of a guide rod (4), which ends are on the housing side, and which wire strain gauges measure the horizontal forces in the guide rod (4) which are caused by the torque transferred from the balance scale (3) onto the parallel guide, and with electronics which corrects the weight value emitted from the weighing receiver on the basis of the output signals of the wire strain gauges (15) and from stored comer-load correction factors that at least one of the guide rods (4) is supported on its housing-side end on an intermediate piece (18), that this intermediate piece (18) is connected by at least one approximately vertical thin web (13) and by a horizontal thin web (14) to the system carrier (1) fixed to the housin
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: December 1, 1998
    Assignee: Sartorius AG
    Inventors: Otto Kuhlmann, Christoph Berg
  • Patent number: 5817988
    Abstract: An apparatus for measuring the weight of a molded resin article in conjunction with an injection molding cycle and judging whether the molded article is acceptable or rejective. A belt conveyor is provided below a mold for injection molding. Articles (connector housings) molded with the mold are dropped out of the mold onto the belt conveyor when the mold is opened, and transported to a weight checker by means of the belt conveyor. In the weight checker, the weight of the transported articles is measured. The measured weight is compared with a predetermined reference weight. If the measured weight is within a predetermined permissible range with respect to the reference weight, it is judged that the molded articles are acceptable, and then the molded articles are dropped into an acceptance box.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: October 6, 1998
    Assignees: Sumitomo Wiring Systems, Ltd., Sumidenso Platech, Ltd.
    Inventor: Norikazu Suzuki
  • Patent number: 5811737
    Abstract: A source reduction analysis process of integrating scales to minimize chemical product usage. Based on residuals identified by weight measurements, an economic decision is made to reinstate for consumption, recycling or disposal of the product residual.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: September 22, 1998
    Inventor: Stephen N. Gaiski
  • Patent number: 5808242
    Abstract: An electromagnetic flow rate measuring apparatus measures and calculates a flow rate of granules based on a measurement of capacitance which changes according to the quantity of the granules flowing at a granule passage. The measuring apparatus includes a granule flow pipe which is coupled to the granule passage and is provided in the course of the granule passage, a capacitance detector provided to the granule flow pipe, shutters respectively provided at an upper end and a lower end of the granule flow pipe, for cutting off the flow of granules, the shutters being individually operable, and a load cell type weight detector independently supporting the granule flow pipe. The shutters, the load cell type weight detector, and the capacitance detector are connected to a calculation control device. The measuring apparatus provides a flow rate which is not influenced by the moisture content or the density of the granules.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: September 15, 1998
    Assignee: Satake Corporation
    Inventors: Satoru Satake, Yasuharu Mitoma, Katsunori Ito
  • Patent number: 5801337
    Abstract: A method of compensating for load/environment temperature differential-induced measured load weight error comprises the steps of: providing a load having a load temperature T.sub.L ; providing an environment having an environment temperature T.sub.E, different from the load temperature; subjecting the load to the environment at time t.sub.0 ; measuring the weight w.sub.0 of the load at time t.sub.0 ; measuring the weight w.sub.1 of the load at time t.sub.1 ; and calculating the change in weight .DELTA.w.sub.td of the load, between the time t.sub.0 at which the load is subjected to the environment and the time t.sub.2 at which the load and environment temperatures reach equilibrium, induced by the temperature differential between the load and the environment, from the measured load weights w.sub.0 and w.sub.1. The method further comprises the steps of: measuring the weight w.sub.n of the load at time t.sub.n .gtoreq.t.sub.2 ; and subtracting the temperature differential-induced load weight change .DELTA.w.sub.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: September 1, 1998
    Assignee: Barnstead/Thermolyne Corporation
    Inventor: Steven C. Peake
  • Patent number: 5796051
    Abstract: A process and apparatus for in-line capsule check weighing envisages that the capsules to be weighed be fed to a device which separates them and feeds them over a transfer surface. The capsules are positioned over the transfer surface so that their longitudinal axes are horizontal and transversal to the direction of feed and are fed to the checkweigher pans, which have seats in the transfer surface and are attached to checkweigher transducers. The weight reading for the capsules and of the relative pans is obtained at the moment in which the capsules come to rest on the pans. Finally, the weight of the pans is determined after the capsules have been moved away, so that the net weight of the capsules may be calculated.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: August 18, 1998
    Assignee: Macofar S.p.A.
    Inventors: Franco Chiari, Bruno Zanarini
  • Patent number: 5780778
    Abstract: In an improved postage scale system, soft-selection keys are used for selecting options including shipping service options provided by the system. The display on such a system is adjustable for comfortable viewing thereof. The system is capable of interfacing and communicating with other devices such as a printer, a remote computer, an optical scanner, an integrated circuit (IC) card, etc. Certain data and code for use in the system can be updated by downloading new data and code from IC cards to the system. A security measure is instituted such that, after an update of the data or code, a system user is required to enter a valid authorization number in order to enable the system. Such a measure is, in part, necessary for deterring unauthorized copying of software of the system onto another similar system.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 14, 1998
    Assignee: Ascom Hasler Mailing Systems, Inc.
    Inventors: Robert G. Schwartz, Allen A. Crowe, James S. Emmett, Fetneh Eskandari, Martin F. Palange, Mark E. Simcik, Robert Swanbery, Robert J. Japenga, Joseph L. Lehman, William A. Weirsman, George P. Rahgo
  • Patent number: 5780777
    Abstract: In order, in a weighing device, in particular for use in high-resolution scales, comprising an elastically deformable force transducer, a sensor arrangement for converting the deformation of the force transducer caused on account of a force F acting on the force input section of the force transducer into an electrical weighing signal and a processing unit for calculating a weighing signal corrected by the hysteresis error of the force transducer, to be able to realize a correction of the hysteresis error even with the short-term load variations occurring in practice in high-resolution scales at an acceptable cost, it is suggested that the sensor arrangement comprise a first testing unit for the high-resolution determination of the weighing signal "S" and a second testing unit for the determination of the elastic deformation of the force transducer in small time increments (high time resolution), wherein the processing unit corrects the high-resolution weighing signal of the first testing unit by the hysteresi
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: July 14, 1998
    Assignee: Bizerba GmbH & Co. KG
    Inventor: Klaus Peter Selig
  • Patent number: 5780782
    Abstract: An on-board weighing system employs a master unit, and one or more remote units to which weight sensors are connected. Calibration information for each weight sensor is stored in the remote unit to which it is connected. Analog weight related signals generated by the weight sensors also are converted by the remote units to digital sensor values. The remote units are connectable by a communications network with the master unit such that the master unit can read the digital sensor value and calibration information of each weight sensor for processing to yield vehicle weight. The on-board weighing system facilitates trailer swapping by automatically recording and tracking calibration information for the weight sensors in the remote units which together are mounted on the trailers that are swapped.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 14, 1998
    Assignee: Hi-Tech Transport Electronics, Inc.
    Inventor: James O. O'Dea
  • Patent number: 5767454
    Abstract: An electronic scale including a fault-detecting electronic display module which can detect a crack in a display, a separation in a cable connected to the display, and a separation between the cable and a connector on a printed circuit board. The fault-detecting electronic display module includes the display, which displays a weight of an object, the cable, and a fault-detecting line extending around at least a portion of the perimeter of the electronic display and through the cable. The electronic scale also includes a load cell for sensing the weight of the object, and a controller coupled to the load cell and to the fault-detecting display module.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: June 16, 1998
    Assignee: NCR Corporation
    Inventor: John C. Goodwin, III
  • Patent number: 5760342
    Abstract: Combinational weighing by ranks is carried out by supplying articles of different weights to a plurality of weighing devices one at a time, measuring individual weights of these articles by the weighing devices, classifying the weighed articles individually into ranks according to their measured weights, and carrying out combinational weighing only on those of the weighed articles in a same rank. The combinational weighing is carried out preferentially on the articles in the most populated rank. An apparatus for this method not only includes a plurality of weighing devices, an article supplying units adapted to supply articles of different weights one at a time to these weighing devices, and a device for carrying out combinational calculations but also is adapted to classify weighed articles into ranks according to the measured weights.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: June 2, 1998
    Assignee: Ishida Co., Ltd.
    Inventors: Masahiro Takeda, Kiyokazu Shibahara
  • Patent number: 5756939
    Abstract: A combinational weighing machine has articles delivered to a dispersion feeder, distribtuted therefrom to a plurality of weigh hoppers through independently driven radial feeders, and weighed such that a combination of weigh hoppers can be selected and their contents can be discharged together. Vibrations of each radial feeder are controlled by parameter values which are calculated on the basis of the parameter values previously set therefor and the weight of the articles in the corresponding weigh hopper. When the amount of the articles on the dispersion feeder drops abnormally and becomes less than a certain lower limit, the parameter values at the time are stored and, when the amount of the articles on the dispersion feeder returns to normal again, parameter values based on the stored values are used, instead of the previous parameter values, to calculate new parameter values to control the vibrations of the radial feeders.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: May 26, 1998
    Assignee: Ishida Co., Ltd.
    Inventor: Aritoshi Taniguchi
  • Patent number: 5750938
    Abstract: A drug weighing method presenting the steps of feeding an orderly succession of drugs to a capacitive sensor; determining the weight of each drug by means of the capacitive sensor;periodically weighing a number of drugs in the succession by means of a precision scale;and periodically calibrating the capacitive sensoron the basis of the directly determined drug weights.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: May 12, 1998
    Assignee: MG2 S.p.A.
    Inventors: Sandro De Caris, Angelo Ansaloni
  • Patent number: 5686653
    Abstract: There is provided an system and method for calibrating weigh assemblies of bulk material feeders using test chains of known weight and pitch. In particular, the present invention is a calibration checking system for a belt-type gravimetric feeder or conveyor having a weigh span section and comprises a continuous conveyor belt, at least one pair of support rollers and at least one weigh roller. A particular weigh roller is disposed under an upper strand of the conveyor belt and equidistant from each of the support rollers so that they are in planar alignment with one another. The calibration checking assembly also comprises a test chain having a chain pitch that is integrally divisible into the pitch of the weigh span section. In addition, portions of the conveyor belt on both sides of the weigh span are inclined equally at a single particular angle relative to the weigh span section.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: November 11, 1997
    Assignee: General Signal Corporation
    Inventors: John C. Homer, III, J. Ronald Walsh, David P. Ratcliffe
  • Patent number: 5679882
    Abstract: A measuring pick-up or detector shall be made less sensitive against off-center load applications if necessary. At least it must be made certain that the off-center load sensitivity is within a permissible tolerance range. For this purpose the sensor body (1A, 1', SB) of the detector (1) to which there is applied at least one pick-up element or strain gage (5), is held for each load application in a different fixed position in a mounting (2) in such a way that, spaced from the clamping position a test load can be applied in a direction deviating from the direction and/or position of the axis of symmetry (CA, AS) of the sensor body (1A, 1', SB). A respective output signal is measured and correlated to the applied test load. At least one additional test load of the same size is applied in a different load application direction, and the respective output signal is again measured and correlated to the second test load.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: October 21, 1997
    Assignee: Hottinger Baldwin Messtechnik GmbH
    Inventors: Hans-Joachim Gerlach, Heinz Ronald Will, Ralf Waegner, Werner Schlachter
  • Patent number: 5670751
    Abstract: In order to provide a method of gravimetric metering of bulk materials with a calibration facility thus achieving higher weighing accuracy there is proposed a method wherein the pressure in the weighing container is measured and the weighing signal is only transferred from the weighing electronics to be registered when a limit pressure value is attained, especially atmospheric pressure.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: September 23, 1997
    Assignee: Pfister GmbH
    Inventor: Hans Wilhelm Hafner
  • Patent number: 5661268
    Abstract: A method of recalibrating an electronic scale is disclosed which causes the scale to indicate accurate weight measurements regardless of variations in the physical and/or environmental conditions under which the scale is operating between a site of origin and a site of installation which tend to adversely effect accurate weight. The method utilizes the removable platter of the scale as a fixed weight of indeterminate amount which is used to calibrate the scale at a site of origin under controlled physical and/or environmental conditions and to recalibrate the scale at a site of installation at which the physical and/or environmental conditions may be different from those that prevailed at the site of origin.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: August 26, 1997
    Assignee: Pitney Bowes Inc.
    Inventors: Gerald C. Freeman, Konstantin G. Kodonas, Paul C. Talmadge
  • Patent number: 5635679
    Abstract: In a dynamic weighing device including a weight signal treating filter for measuring the weight of an article while the article is conveyed by a weighing conveyer, a device and a method of automatically determining an optimum time point for reading the weight signal and/or an optimum characteristic of the filter to be used, wherein the weight signal is read and stored plural times between two predetermined time points with and/or without variation of the filter characteristic, this operation is repeated about the same article or a plurality of articles which are substantially same in weight and, thereafter, the reading time point and filter characteristic corresponding to one of the groups of weight measurements of the respective times which gives a minimum dispersion of the weight measurements are selected as the optimum conditions.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: June 3, 1997
    Assignee: Yamato Scale Company, Limited
    Inventors: Toru Kohashi, Morihito Kamon
  • Patent number: 5629498
    Abstract: Automated tracking devices for counting, sorting, weighing, and containing articles, such as sponges that contain fluids from patients undergoing surgery. Devices according to the present invention employ a suspended container for receiving and sorting the articles. The cumulative weight of the container contents is sensed accurately and registered reliably after an appropriate settling period via a load cell structure which is aimed at eliminating bending moments and non-vertical force components imposed by the container and its contents. Automatic sensing of the presence of the container allows continuous, rather than solely end-point, fluid monitoring during the surgical procedures and allows this monitoring to continue as successive containers are changed during an operation. Appropriate warnings occur after a predetermined number of articles have been introduced into the container, in order to indicate that a container change is due.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: May 13, 1997
    Assignee: Richard A. Pollock
    Inventors: Richard A. Pollock, Mahmood S. Kassam
  • Patent number: 5625170
    Abstract: A time delayed differential weighing procedure used with an electronic analytical balance is optimized for samples exhibiting a small change in mass, for example from deposition, etching, plating or corroding, relative to the sample mass to minimize all significant sources of error that could otherwise degrade the measurement results, such as errors resulting from air density and temperature changes that occur during the interval between the first measurement of a sample, before the sample is processed, and a subsequent measurement of the sample, after the sample is processed. A calibration standard having substantially the same density as that of the sample is weighed both times the sample is weighed, i.e. before and after processing, to track the change in the sample balance reading due to air density and temperature changes, and thereby eliminate sample related errors. Balance and weighing procedure accuracy and precision are tested by a gauge study procedure.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: April 29, 1997
    Assignee: Nanometrics Incorporated
    Inventor: Jaime Poris
  • Patent number: 5610373
    Abstract: An improved scale, including bathroom-type scales, is provided by employing markings on the dial for calibrating the scale using photosensor equipment. The adjusting nut of the scale and the calibration stud of the scale are both accessible for automated mechanical calibration after assembly of the scale. As a result, an iterative calibration procedure is employed by machine as opposed to traditional manual methods. Photosensors read the dial and send a signal to mechanical driver or wrench mechanisms for automated calibration. The improved scale and calibration method reduces labor and production costs.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: March 11, 1997
    Assignee: Sunbeam Corporation
    Inventors: Delbert B. Graves, Michael L. Pyle, Victor Rossol, Paul R. Buhr
  • Patent number: 5608193
    Abstract: The invention uses the electronic scale and the computer to track tool inventories. Users weigh tools (including the tool box) before and after performing mechanical or other critical work. Discrepancies between the two weights are noted by a supervisor or optional computer software. To aid in the resolution of weight discrepancies, software can be used to search a database and suggest which tool may have been left behind. Any tool weight discrepancies, which could be a decrease or increase in weight for the second weighing, must be addressed and resolved before the maintenance work is safely completed. The invention has applications in areas where strict inventory of tools and equipment must be maintained such as the medical and dental fields, other safety-related mechanical work, and tracking of tools going into and out of penal institutions. Leaving tools behind or removing parts during maintenance work can result in unsafe operating conditions and/or operating failure.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: March 4, 1997
    Inventor: Ali H. Almogaibil
  • Patent number: 5606516
    Abstract: A pressure transducer module includes a plurality of cavities, each cavity in fluid communication with a hydraulic load cell. Each cavity deforms with variations in the pressure of the hydraulic fluid in the cavity. Sensors generate output signals representative of the deformation of the cavities. The sensor output signals are digitized and multiplexed, whereby the transducer module generates a digital output data stream. The pressure transducer module is pre-calibrated for creep, hysteresis, non-linearity and temperature related errors. A computer controller stores the calibration data for the module. The pressure transducer module also includes a temperature sensor. A weighing system includes a weighing platform or structure; at least one pressure transducer module; and hydraulic transducers for measuring the load applied to the weighing platform or structure. A controller receives the outputs of the sensors and applies the calibration data to calculate the weight of the load on the platform.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: February 25, 1997
    Assignee: Fairbanks Scales Inc.
    Inventors: Alec T. Douglas, Harry J. Keen