Patent GB-1452655-A (GB)
Title: Egg packing method and apparatus
IPC: B65B23/02
Filed: 1974-07-31
Abstract: 1452655 Method and apparatus for packing eggs DIAMOND INTERNATIONAL CORP 31 July 1974 [15 May 1974] 33789/74 Heading B8C A method of packing eggs, and articles shaped like eggs, in the pockets of a carton or tray comprises the steps of separating the eggs into rows, feeding the eggs in each row, one at a time, to a conveyer below which the pockets are located, aligning the eggs in the direction of their pointed ends while moving them along the conveyer so that the direction of their pointed ends extends substantially transversely of the direction of movement of the conveyer, turning the eggs to a point down position near the exit end of the conveyer, and transporting the eggs after they have assumed the point down position, from the conveyer to the pockets, the pockets being located substantially vertically below the exit end and the eggs being supported in a downwardly movable holder to carry them down to the pockets. In an apparatus, Fig. 1, eggs 10 are separated into rows by dividers 14 as they are moved forward by the slats 13 of a reservoir conveyer 12 toward an interrogation system which comprises pivotally-mounted fingers 15 each with a flag 16 the machine being run continuously as long as each finger 15 is raised by a moving egg so that the flaps 16 do not interrupt a light beam from a photo-cell 17. As each egg leaves the conveyer 12 it is transferred, by a pad 21, on to the inclined roller conveyer 20 which comprises rollers 26 which are interconnected by carrier links 31 which also support, non- rotatably mounted, rods 27 the rollers 26 being rotated by pinion gears 28 which engage a stationary rack 28. The pad 21, operated by a cam wheel 24 connected to the drive of the conveyor 20 and a lever 22 with a cam follower 25, lifts each egg 10, in timed relationship, between a roller 26 and its associated rod 27, the eggs being rotated, in a clockwise direction, by the roller 26, as they are transported up the conveyer 20 and each egg, due to its cone shape, travelling in a lateral direction with its small end leading, Fig. 4, to be aligned against a guide plate 30. As each roller 26 enters the radius of the upper sprocket of the conveyer 20 the egg carried thereby moves at a higher velocity through this area 40, the roller pinion 28 disengaging the rack 29 to rotate freely as the egg in each row engages a U-shaped plough 41 which is supported by a spring 42. Each egg then drops, point down, into a plastics retainer 43 where it is temporarily retained by a clam-shell 44 which is operated by cam link mechanisms 34, 40, 47 driven by a shaft 33 of the conveyer 20, Fig. 1, to move away from the retainer 43, after receipt of an egg, and drop the egg into a corresponding pair of clam shells 50, 51. The latter are drawlink connected to move toward each other to match the spacing of the eggs with that of the pockets of a tray or carton. The drawlink connection comprises, for each set of shells 50, or 51, a set of U-shaped links 65 each of which is connected to a shell, the set having lateral, lost-motion, connections between the shells. The end links 65 co-operate with U- shaped links 63, 63, Fig. 7, which, as with the links 65, are mounted on a rod 64, and which are movable toward, and away from, each other by crank arms 59 attached to driving wheels 52, 52, mounted on carrier plates 55, 55. As the latter are raised and lowered by arms 57, 58 to respectively place the shells 50, 51 beneath the retainers 43 and just above the pockets of the carton, the wheels 52, 52, co-operate with vertical steel wires 54, 59, and rotate so that the shells 50, 51 are correspondingly spread apart and drawn together. As the clam-shells 50, 51 move together and approach the bottom of their descent an arm 67 encounters a projection 68 attached to a fixed frame 35 to move rods, e.g. 69, connected to the shells 50, 51 to spread the latter apart and drop the eggs held therebetween into the pockets below.