A screening assembly for screening material includes an assembly frame, a multi-deck screening device, a transfer conveyor and a drive means. The drive means is operable to shift at least one of the discharge ends of the screening device and the receiving end of the conveyor relative to the assembly frame to allow the transfer conveyor to selectively receive material from an upper screen and from both screens of the screening device at their respective discharge ends. A mobile material processing plant incorporating the screening assembly is included.

A screening assembly for screening material includes an assembly frame, a multi-deck screening device, a transfer conveyor and a drive means. The drive means is operable to shift at least one of the discharge ends of the screening device and the receiving end of the conveyor relative to the assembly frame to allow the transfer conveyor to selectively receive material from an upper screen and from both screens of the screening device at their respective discharge ends. A mobile material processing plant incorporating the screening assembly is included.

Devices, systems, and methods for transporting or transferring insect pupae in an aqueous solution are described. The system includes a tank containing a solution with insect pupae, a transfer chamber having an outlet at a bottom portion of the chamber, a solution inlet, an evacuation channel, and a depth measurement system. A tube fluidly connects to tank and the transfer chamber. An evacuation device connected to the evacuation channel removes air from the transfer chamber and generates a vacuum therein to draw the solution through the tube into the transfer chamber.

An apparatus may include: a shaker body; a shaker screen disposed within the shaker body; and one or more air nozzles disposed within the shaker body, wherein the one or more air nozzles is positioned below the shaker screen, and wherein the one or more air nozzles is operable to deliver a pressurized stream of air to at least a portion of a bottom of the shaker screen.

A screening apparatus includes a vibrating screen assembly that includes a screen and a vibrating mechanism operable on the screen to cause vibration of the screen, the screen having a feed end and a discharge end. At least one shield member is positioned on the screen and is configured to cover part of the screen between the feed end of the screen and a position intermediate the feed and discharge ends of the screen, such that particulate material for screening by the screen can be fed on to the, or each, shield member, the, or each shield member being positioned on the screen so that a vibrational pattern of the screen is imparted to the shield member. An adjustment mechanism is operatively engaged with the, or each, shield member to adjust a position of a discharge end of the, or each, shield member relative to the discharge end of the screen.

A screening apparatus includes a vibrating screen assembly that includes a screen and a vibrating mechanism operable on the screen to cause vibration of the screen, the screen having a feed end and a discharge end. At least one shield member is positioned on the screen and is configured to cover part of the screen between the feed end of the screen and a position intermediate the feed and discharge ends of the screen, such that particulate material for screening by the screen can be fed on to the, or each, shield member, the, or each shield member being positioned on the screen so that a vibrational pattern of the screen is imparted to the shield member. An adjustment mechanism is operatively engaged with the, or each, shield member to adjust a position of a discharge end of the, or each, shield member relative to the discharge end of the screen.

The present invention relates generally to the field of sifters. More specifically, the present invention relates to a sifter lid device. The device is comprised of a body further comprised of a funnel area and a continuous opening in the top surface of the body that receives a sifter insert. The device can be placed on a container such that the contents of the container are sifted through the sifter insert and then can be poured using the funnel area into a secondary location or other container as desired. The sifter insert is further removable and may have a plurality of screen spacings. The device may also be comprised of a lid that covers the sifter insert when the device is not in use but is still attached to a container.

An apparatus may include: a shaker body; a shaker screen disposed within the shaker body; and one or more air nozzles disposed within the shaker body, wherein the one or more air nozzles is positioned below the shaker screen, and wherein the one or more air nozzles is operable to deliver a pressurized stream of air to at least a portion of a bottom of the shaker screen.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.