Abstract: A checkweighing device, checkweighing systems employing one or more checkweighing devices, and methods of operation thereof. The checkweighing devices are designed for installation between parallel, spaced apart and vertically offset infeed and outfeed conveyors. Each checkweighing device includes a weighing cell with a weighing platform; a slide chute and at least one sorting gate for directing items either to the outfeed conveyor or to a discard receiver; and a power-actuated rake for sweeping incoming items from the infeed conveyor to the weighing platform, and sweeping weighed items from the weighing platform to the slide chute. While in no way limited to such a use, exemplary checkweighing device, system and method embodiments are well-suited for automatically checking the individual weights of small articles of high value, and/or other items that need to be weighed with high accuracy.

Abstract: A checkweighing device, checkweighing systems employing one or more checkweighing devices, and methods of operation thereof. The checkweighing devices are designed for installation between parallel, spaced apart and vertically offset infeed and outfeed conveyors. Each checkweighing device includes a weighing cell with a weighing platform; a slide chute and at least one sorting gate for directing items either to the outfeed conveyor or to a discard receiver; and a power-actuated rake for sweeping incoming items from the infeed conveyor to the weighing platform, and sweeping weighed items from the weighing platform to the slide chute. While in no way limited to such a use, exemplary checkweighing device, system and method embodiments are well-suited for automatically checking the individual weights of small articles of high value, and/or other items that need to be weighed with high accuracy.

Abstract: Exemplary embodiments described herein are directed to conveyor belt tracking mechanisms with a single adjusting element and to conveyors having conveyor belts whose tracking may be adjusted in both directions using such conveyor belt tracking mechanisms. One exemplary conveyor belt tracking mechanism embodiment employs a pulley support yoke coupled to a specialized angular linkage having a linkage flexure pivot that translates linear motion into angular motion.

Abstract: Exemplary embodiments described herein are directed to conveyor belt tracking mechanisms with a single adjusting element and to conveyors having conveyor belts whose tracking may be adjusted in both directions using such conveyor belt tracking mechanisms. One exemplary conveyor belt tracking mechanism embodiment employs a pulley support yoke coupled to a specialized angular linkage having a linkage flexure pivot that translates linear motion into angular motion.

Abstract: A system and method of validating checkweigher performance (weighing accuracy). The invention involves removing an object to be weighed from a conveyor prior to the object reaching a checkweigher to be validated, weighing the object on a static scale, reintroducing the object to the conveyor upstream of the checkweigher, weighing the object with the checkweigher, and comparing the two weight readings of the object to determine if the checkweigher is accurately weighing objects. Validation objects may be automatically removed from the conveyor by a transfer mechanism.

Abstract: A system and method of validating checkweigher performance (weighing accuracy). The invention involves removing an object to be weighed from a conveyor prior to the object reaching a checkweigher to be validated, weighing the object on a static scale, reintroducing the object to the conveyor upstream of the checkweigher, weighing the object with the checkweigher, and comparing the two weight readings of the object to determine if the checkweigher is accurately weighing objects. Validation objects may be automatically removed from the conveyor by a transfer mechanism.

Abstract: The weighing apparatus may have a plurality of conveyor belts, a plurality of physical scales, a plurality of logical scales and a master processor. The master processor may receive weight results from the plurality of physical and logical scales and may determine a net weight of said package. The weighing apparatus may also include a plurality of slave processors.

Abstract: A pneumatic weighing device has a weigh pan, which is supported for vertical movement by a load cell in response to the weight of an article; the weigh pan is provided with a plenum chamber having an apertured upper surface through which air under pressure is directed for purpose of providing an air cushion for supporting and transporting articles to be weighed. The weighing device additionally includes pneumatic means for rejecting articles of improper weight.

Abstract: A mechanism for weighing articles including a continuous thread screw conveyor for moving articles to be weighed across a weigh pan in combination with a motor for first driving the conveyor in an article transport direction through an angle of 360.degree.+.alpha..degree. and then driving the conveyor in a reverse direction through an angle of .alpha..degree. to remove the conveyor from frictional engagement with the article, during each article weighing operation.