Patent GB-1113469-A (GB)
Title: Device and method for sorting in size agricultural or horticultural products
IPC: B07B13/07
Filed: 1966-12-16
Abstract: 1,113,469. Grading apparatus. J. A. DE GREEF. 16 Dec., 1966 [20 Dec., 1965], No. 56409/66. Heading B2H. A machine for sorting agricultural or horticultural produce according to size comprises a frame, a driven conveying member mounted for rotation in the frame about an axis directed downwards, and a driven gauging device supported by the frame through guide members, the gauging device extending above at least part of the periphery of the conveying member and being adjustably spaced from the conveying member at a height increasing in the direction of rotation of the conveying member from a place for supplying produce to the conveying member along and beyond a number of places for delivering produce from the conveying member, the conveying member and the gauging device defining an uninterrupted chute for the produce. The gauging device may be driven at the same speed as, or at a lower speed than the conveying member. In Figs. 1 and 2, a gauging ring 22 is mounted for rotation above a conveying cone 21 rotatable in a frame 20. Fruits or other produce to be sorted are fed one by one at 24 on the upper surface of the cone via a chute 23. The ring 22 is supported by freely rotatable rollers 26 and is driven by a roller 27. The height of the rollers are adjusted by means of sliding members 26 so that the space between the cone 21 and the ring 22 increases from the supply point 24 in the direction of rotation of the cone 21 whereby fruits of increasing size will be discharged through spaces 29a-29d of increasing height into respective boxes 25a-25d. In another embodiment, Figs. 3 and 4 (not shown) the fruits are driven by centrifugal force through the space between a rotary horizontal conveyor disc (40) and a gauging ring (32) carried by a downwardly extending flange of a wheel rotatably supported at an angle above the disc (40) on a hollow shaft (36) through which fruits are fed. A further embodiment, Figs. 5 to 7 (not shown) is similar to that described with reference to Figs. 4 and 5 of Specification 1113470. In a modification of the last-mentioned embodiment, the gauging device consists of an endless metal band 56, Fig. 8. coated on the outside with a layer 57 of foam rubber and supporting hooks 58 which engage nylon guide strips 60 supported by a C-shaped beam 59 on both sides of which the band 56 is guided by guide strips 61 supported by the beam. In another embodiment, Fig. 9, two driven gauging devices in the form of endless bands 64 and two supply chutes 65 are used in combination with a single conveying member 66. two groups of fruits being sorted in parallel, the smallest being delivered at 67a and the oversize at 67e. In a further embodiment, Fig. 11, a steel gauging endless band 69 has an upper edge in engagement with a rotatable ring 71 and with a drive pulley 73. Adjustable guide members 75 serve to adjust the height of the band above a conveying member 77. The ring 71 may be mounted fcr rotation in the same manner as the ring 22 in Figs. 1 and 2. In a still further embodiment, Fig. 16, a number of sector members 110 extend along the generating line of a cone. Each member 110 at its inner end engages a pin 112 on a support 108 slidable on pins 107 disposed on a conveying disc 106. The height of the support 108 is adjustable by means of a screwjack 116 in order to provide a different spacing between each sector member 110 and a gauging band 118. A gauging device having a number of gauging members guided above the conveying member along a stepped path, Figs. 13 and 14 (not shown), is similar to that described in Figs. 1 to 3 of the above application.