Machines for handling seeds

Details Machines for handling seeds Machines for handling seeds

A - Human Necessities

01

C

111/16

A01C 7/04 (2006.01)

Patent

CA 1106702

Machines for handling seeds ABSTRACT OF THE DISCLOSURE A machine for picking up seeds from a mass of seeds and depositing the seeds individually comprises a row of suction heads each having a suction duct terminating in an orifice and a container for holding the mass of seeds. The row of heads are pivotally mounted and are provided with a driving mechanism which swings the heads to and fro along a path between a pick-up position in which each of the orifices is adjacent the container and a discharge position in which seeds picked up by suction through the orifices are discharged. In order to enable each head to discharge at the discharge position only a single natural seed rather than a pelleted seed, a wiper member is provided and extends parallel to the row of heads in their path between the pick-up position and the discharge position. The wiper member has a curved surface and the heads swing close to this surface just before they reach the discharge position. The surface is so shaped that a tapering space is formed between the surface and a flat circular surface surrounding the orifice of each head and this tapering space is of sufficient width to hold a single seed, but squeezes surplus seeds away from the orifice of each head as the orifice passes over the curved surface. Preferably means are provided for applying air pressure to the duct of each head when the head reaches the discharge position to blow the seed held by the orifice from the head and discharge it into a discharge chute. Preferably also the container is an elongated tray having a bottom of V-shaped cross-section and the tray is fitted with a vibrator by which it is vibrated for a short time as the heads reach the pick-up position which is adjacent the apex of the V. The vibration tends to shake the seeds into a single layer on the tray and they advance down one sloping side of -the bottom of the tray to form a row along the apex of the V where they are picked up. This causes each head to pick-up fewer seeds each time it reaches the pick-up position than would otherwise happen.

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