Abstract: A combination weighing device having a plurality of weighing units for weighing out batches of product successively by combining the contents of some of the weighing units which are selected as suitable, each batch, which is weighed out, having a volume controlled to fall within a predetermined range, as well as a weight satisfying a predetermined condition.

Abstract: A combination weighing and packing system including a combination weighing machine and a packing machine which are functionally interlocked with each other so that batches of product weighed out by the weighing machine in accordance with a prescribed weight condition are packed successively in bags by the packing machine, and a common control unit having a display screen and a keyboard, which stores a number of operation parameters of the weighing and packing machines which are selectively displayed on the screen and can be changed or corrected easily by keyboard operation of an operator.

Abstract: A weighing device of a type wherein a vibrating weight indicative signal is integrated and averaged by arithmetic means and the resultant weight is digitally displayed, with the arithmetic means being improved in accordance with the invention by providing means for calculating the period of vibration of the associated vibrating system to determine the integration time from the calculated vibration period, thereby minimizing the measuring error attributable to a variation in the vibration period with the weight of product to be weighed.

Abstract: An apparant density measuring device for a weighing machine comprising a bucket having a known loading volume. Product is fed to the bucket in an amount sufficient to cause overflow from the bucket, the bucket being vibrated for a specific time during this feeding operation. After completion of the feeding operation, the loaded bucket is weighed.

Abstract: An improved apparatus and method for controlling the rate of feeding product to a weigh hopper or cradle by changing the exit aperture of a feeding device in accordance with a characterized condition so that a predetermined amount or weight of product is fed to the weigh hopper or cradle at high accuracy and within a minimum time. The method is especially useful when used in a combination weighing machine.

Abstract: A vibrator for providing revolving vibration to a body to be vibrated such as a dispersion table of a vibration feeder or a sieve stack of a screening machine. In this vibrator, it is possible not only to control the amplitude of vibration but also to obtain a uniform vibration amplitude everywhere in the vibrating body inclusive of its center. A unique feature of this vibrator involves a plurality of armatures fixed to and around a vibrating member and actuated by associated electromagnets energized with multiphase a.c. power.

Abstract: A device for measuring components of force and moment applied to a vehicle tire, which is generally used for automobile tire testing in co-operation with a multi-component load cell structure fixed to a wheel shaft together with a tire to be tested to rotate therewith for picking up the component forces and moments as electric signals. The device includes an arithmetic unit adapted for sampling the data indicative of the component forces and moments and the datum indicative of the angle of rotation at a predetermined interval and storing the same for future use after transforming into the axial components belonging to an orthogonal co-ordinate system fixed to the body of vehicle. This device has such a unique advantage that the load cell structure can be attached directly to a real vehicle without any troublesome modification or re-construction in its parts such as wheel shaft, brake drum and likes, thereby enabling real vehicle driving test.

Abstract: An improved combination weighing method applicable to a prior art "double-shift type" combination weighing machine, in which a plurality of batches of product are weighed respectively and the resultant weight values are combined in various fashion to select from the resultant combinations of batches a combination whose total weight satisfies a predetermined condition, for improving the combination accuracy by modifying the combination selecting operation without any change in the number of batches of product which can participate in the combination arithmetic.

Abstract: An automatic weighing system for delivering quantities of product measured by weight, each quantity having a weight equal or approximate to a predetermined target weight, in such manner that the volume of each quantity falls always within a predetermined allowable range even when the product to be weighed has a substantial variance in its apparent density or specific gravity. The system includes means for measuring the apparent density and means for controlling the target weight in accordance with the measured value of apparent density.

Abstract: A method of weighing out for packing quantities of product each having a weight satisfying a predetermined weight condition by a combination weighing machine including a plurality of weighing hoppers for weighing the product respectively and a plurality of auxiliary hoppers located under the weighing hoppers respectively for receiving the weighed product discharges therefrom. The weights of product are initially stored in weighing hopper memories corresponding to the respective weighing hoppers and then transferred to auxiliary hopper memories corresponding respectively to the auxiliary hoppers at the same time as the weighed product are discharged into the auxiliary hoppers and the emptied weighing hoppers are automatically reloaded with fresh product to be weighed when a stable state is reached.

Abstract: A device used with a conveyer weigher for automatically correcting dynamic weight signals indicative of the weights of articles successively fed to the weighing conveyer of the weigher at constant intervals, wherein the weight signal of each article is influenced by the "aftereffect" of that of the preceding article, which can automatically change the rate of correction when any article drops out from a regular interval feed line, thereby obtaining the true static weight of each article at any time.

Abstract: A method of weighing out for packing quantities of product each having a weight satisfying a predetermined weight condition by a combination weighing machine including a plurality of weighing hoppers for weighing the product respectively and a plurality of auxiliary hoppers located under the weighing hoppers respectively for receiving the weighed product discharged therefrom. The weights of product are initially stored in weighing hopper memories corresponding to the respective weighing hoppers and then transferred to auxiliary hopper memories corresponding respectively to the auxiliary hoppers at the same time as the weighed product are discharged into the auxiliary hoppers and the emptied weighing hoppers are automatically reloaded with fresh product to be weighed when a stable state is reached.

Abstract: An automatic span adjusting device incorporated in a weigher for correcting deviation of the weight signal provided by the weigher from the true weight of product being weighed by the weigher, the device including a memory storing weight values of a plurality of reference weights for span correction and means for automatically reading one of the stored weight values from the memory to provide it for calculating a span correction coefficient.

Abstract: A combination weighing method using a combination weighing machine comprising a plurality of weighing hoppers for weighing product and a plurality of auxiliary hoppers located under respective weighing hoppers for receiving weighed product discharged therefrom. The weights of product are initially stored in weighing hopper memories corresponding to the respective weighing hoppers and then transferred to auxiliary hopper memories weighed product is discharged into the auxiliary hoppers and the emptied weighing hoppers are automatically reloaded with fresh product to be weighed. At least the weight values stored in the auxiliary hopper memories are combined for selecting from the resultant combinations a combination whose sum weight satisfies a predetermined weight condition. The contents of the auxiliary hoppers corresponding to the selected combination are discharged into a collection chute for packing and the emptied auxiliary hoppers are reloaded from the corresponding weighing hoppers.

Abstract: A novel product feeding device for a combination weighing machine. The feeding device is designed to feed a plurality of weighing hoppers of the machine with product, such as uncooked meat, having sticky characteristics so that it cannot be conveyed by vibrating conveyor troughs as used in prior art conventional combination weighing machines. The novel feeding device includes a plurality of horizontal rotating discs corresponding to respective weighing hoppers. The discs are arranged in successively overlapping fashion for transferring product fed to the discs at one sides thereof to respective weighing hoppers disposed under the discs at the opposite sides thereof.

Abstract: An improved gate driving link mechanism is provided, this mechanism being originally designed for opening and closing a flapdoor type discharge gate of a weighing hopper of top-charge and bottom discharge type, used in a combination weighing device such as disclosed in U.S. Pat. No. 4,344,492, the improvement of which is to add an intermediate bell crank for confining overshoot of the opened gate to avoid unwanted time loss which affects high speed operation of the device and undesirable shock and vibration which affect accuracy of measurement.

Abstract: A combination weighing machine, which is used typically for packing a plurality of articles in each bag or the like so as to render the total weight of each bag to satisfy a predetermined weight condition, including a plurality of weighing units for weighing the articles each at the same time, arithmetic means for selecting some of these units the total weight of which satisfies the predetermined weight condition, means for unloading the selected weighing units for delivery of the articles for packing and then loading them with new articles, and, especially, means for adding a small quantity of articles to this system and resuming combination selecting operation when no desired combination has been obtained with the original weighing units.

Abstract: A combination weighing machine, which is used typically for packing a plurality of articles in each bag or the like so as to render the total weight of each bag to satisfy a predetermined weight condition, including a plurality of weighing units for weighing the articles each at the same time, arithmetic means for selecting some of these units the total weight of which satisfies the predetermined weight condition, and means for unloading the selected weighing units for delivery of the articles for packing and then loading them with new articles; each adjoining pair of weighing units being provided with a common auxiliary hopper for receiving weighed articles from either unit of the pair and keeping them for participating in the combination selecting operation together with those articles on the weighing units, thereby improving weighing accuracy without increasing the number of expensive weighing units.

Abstract: A device for measuring force, which is preferably applicable to a weighing device, is provided, wherein two cantilever arms are arranged substantially in parallel and generally in a vertical plane, an elastic member is coupled between the free ends of the both arms so as to be subjected to tension or compression when a force to be measured is applied to the free end of the either arm, the elastic member forms a part of mechano-electric transducer which produces an electric signal whose feature has a theoretical relationship with the applied force, and the device further includes an arithmetic unit for calculating the force in accordance with this relationship.

Abstract: A mass meter of the type of conventional weighing scale having an elastic cantilever mechanism provided with a weighing cradle, and a mechanoelectric transducer for sensing a strain of the cantilever to produce a weight indicative signal, which further includes, for cancelling the effect of gravity, a reference weight accompanied with its loading and unloading means, and an arithmetic unit for processing the weight data obtained in both reference weight loaded and unloaded states to calculate the mass of an article on the weighing cradle.