摘要:
A sorter sorts discrete bruisable articles, such as pieces of fruit like apples, with minimum bruising. A continuous conveying chain has a number of discrete article supporting elements connected to it for linear movement with it, and for pivotal movement about an axis parallel to the chain. At various stations along the chain a self-singulating section is provided in which the articles are singulated onto the supporting elements, a weighing section (or like property determining section) is provided after the self-singulating section, and a discharge section is provided at which the articles are dischargee depending upon the weight sensed in the weighing section. The same chain supporting elements may continue through a second self-singulating section, a second weighing section, and a second discharge section. The supporting elements comprise plastic cups defining a shallow depression on a top face, e.g. a conically shaped depression with sidewalls making an angle of about 20.degree.-30.degree. with respect to the horizontal. The discharge section comprises a rail and a stationary cam having an upwardly angled cam surface located above the rail, and vertically spaced from the rail a distance slightly greater than the thickness of a pin extending from the cup. An electromagnet, or related mechanism, selectively deflects the pin so as to engage the angled cam surface to thereby ride up the cam surface and discharge the article carried by the cup.
摘要:
A power control circuit for improved temperature control of thermoelectric devices to maintain the temperature of thermoelectric devices at a set point. The circuit includes a rectifying device to provide rectified alternating current when receiving an input from an electrical power source; a flyback power supply to supply a DC voltage to the thermoelectric device; a switching device to modulate the rectified alternating current across the primary of the flyback transformer; sensor circuitry to monitor the temperature of the thermoelectric device; and a programmable control device to receive an output from the sensor circuitry and provide a control signal to the switching device, the control signal being determined by the difference between the sensed temperature of the thermoelectric device and the desired set point to allow the DC voltage to the thermoelectric device to bring the temperature of the thermoelectric device to the set point and maintain the temperature of the thermoelectric device at the set point.
摘要:
Bruisable articles, such as pieces of fruit like apples, are singulated, sorted according to property (e.g., weight), and discharged with a minimum of bruising, even if the fruit is not treated with ALAR (diminozide). The cups for holding the fruit are continuously conveyed by conveying chains, and have larger, more steeply angled front and rear surfaces (in the direction of conveyance) than side surfaces so that the fruit will be held in place during conveyance but can be relatively easily discharged when the cup is tilted at a discharge station. Self-singulating is accomplished utilizing conveyors on either side of the row of cups, an overhead rotating brush, and elongated brush strips. The brushes of the brush strips gently engage the fruit and urge it into position within a cup. At the discharge section, a brush having polyethylene bristles of about 4-6 inches in length is rotated with a tangential velocity approximately equal to the velocity in the direction of conveyance of the fruit by the cups at the discharge area. The fruit falls into the brush bristles and is cushioned as it enters them, and it is discharged at a different level on another conveyor moving in a different direction.
摘要:
An article transporting, and preferably also color and/or weight sorting, assembly and method, support the articles (.g. apples or like pieces of fruit), and effect precise rotation (e.g. within about 5°) of all apples transported thereby. This allows accurate determination of the apple's color by color sensing equipment (e.g. a color camera). The assembly comprises a support element, and two sets of cones mounted to the support by rotatable shafts, each set comprising first and second cones having a tapered exterior surface, the cones on each shaft facing each other and tapering to an imaginary substantially common midpoint. The cones support an apple essentially without the apple engaging the shaft. The cones may be of soft yieldable plastic or rubber with a first taper of about 25-35° (e.g. about 28°), and optionally one or more steps of different taper. The shafts are positively rotated substantially in unison by a gear mounted to the end of each shaft and engaging a stationary gear rack, so that for each 360° revolution of a shaft an apple supported by the cones rotates substantially 120°. The rack is designed to have only half or less the life of the gears.
摘要:
A bagger for fruit or other discrete articles ensures that the bag has a minimum weight of fruit but with the lowest overage practical. A weigh pan is fed by a first conveyor having a number of singulating lanes, with an individual weigh chute at the end of each lane. The conveyor is controlled to stop filling the pan once a certain number of articles (sensed by photosensors) have passed into the pan which is less than the expected number of articles which will meet the minimum weight of articles to be bagged. Then the individual weigh chutes are loaded with one article each, and the individual or combinations of weights of one or more articles from the weigh chutes are calculated. The desired individual combination is selected which causes the weight of articles in the pan to exceed the predetermined weight by the lowest amount, and that desired individual or combination of articles is fed to the pan, the weight is confirmed in the pan, then the pan tilted to discharge the articles. A second conveyor feeds the first conveyor, and a shunt is provided to divert all, none, or some articles from the second conveyor to the first conveyor.
摘要:
A cup for conveying fruit, or other discrete bruisable articles to be sorted, is connected to a transporting chain. The cup has a first body of a first plastic, such as Delrin or UHMW, which has dimensional stability, which is connected to the transporting chain. The cup also has a second body of a second plastic which is of a less expensive/quality material, such as a softer material having the cost characteristics of EVA. The second body is irremovably connected to the first body and extends from it in a dimension opposite to the connection of the first body to the transporting chain, and the second body has a generally conical depression with the front and rear edges longer than the side edges and a varying angle of inclination, that prevents a discrete bruisable element from inadvertently moving out of the body. A trip tab may extend downwardly from the first body.
摘要:
A sorter sorts discrete bruisable articles, such as pieces of fruit like applies, with minimum bruising. A continuous conveyor chain has a number of discrete article supporting elements connected to it for linear movement with it, and for pivotal movement about an axis parallel to the chain. At various stations along the chain a self-singulating section is provided in which the articles are singulated onto the supporting elements, a weighing section (or like property determining section) is provided after the self-singulating section, and a discharge section is provided at which the articles are discharged depending upon the weight sensed in the weighing section. The same chain supporting elements may continue through a second self-singulating section, a second weighing section, and a second discharge section. The supporting elements comprise plastic cups defining a shallow depresssion on a top face, e.g. a conically shaped depression with sidewalls making an angle of about 20.degree.-30.degree. with respect to the horizontal. The discharge section comprises a rail and a stationary cam having an upwardly angled cam surface located above the rail, and vertically spaced from the rail a distance slightly greater than the thickness of a pin extending from the cup. An electromagnet, or related mechanism, selectively deflects the pin so as to engage the angled cam surface to thereby ride up the cam surface and discharge the article carried by the cup.
摘要:
An automatic bagging machine and method gently and efficiently handle bruisable articles to be automatically bagged, such as apples. The bagger includes a weighing pan, a bag supply, a source of compressed air for inflating a plastic bag while it is held open at spaced points adjacent its top, and a cushioning arm assembly for engaging the exterior of the bag as it is being filled with articles to cushion the fall of the articles. A piston and cylinder moves the cushioning arm into engagement with the bag exterior while it is being filled, and away from the bag after the fall of articles has been effectively broken (cushioned). A number of conveyors that are independently controlled feed articles to the pan, and an ultrasound sensor senses the volume of the next article or articles to be fed to the pan in each conveyor path, and that conveyor or conveyors is or are operated which contains the next article or articles closest to the desired weight of articles in the pan, or slightly above it. After being filled, the bag is moved by a pair of spaced grippers in a horizontal plane, with at least a slight twist imparted to the bag as it is moved, so that the open top of the bag at least starts to move to be closed. The open top is then moved into operative association with an automatic tier, and tied closed.
摘要:
A method and apparatus for bagging bruisable discrete articles, such as apples. The apples are fed single file to a weighing device, and the feed of articles is terminated just before the desired predetermined weight of apples to be bagged. The weighing device is allowed to reach equilibrium, and then the weight of the apples is compared to the desired predetermined weight. If the weight is less than the desired amount, the apples are fed one by one to the weighing device until the predetermined weight is reached or exceeded, at which time the apples in the weighing device are dumped onto a pair of spiral brushes which convey the apples to a bagging station. At the bagging station, a bag is clamped and blown open, and is filled with apples being fed one at a time. The bag full condition is automatically sensed, at which point one of the clamps is released, and an arm supporting the other clamp is pivoted to swing the bag into operative association with an automatic tying machine.