A screw feeder includes: a case that includes a material putting-in portion through which a fluff material is put in and a material putting-out portion through which the fluff material is put out below the material putting-in portion; and a screw that includes a rotational shaft and a blade portion, the rotational shaft being provided rotatably inside the case, the blade portion being spirally mounted on the rotational shaft; wherein the screw is rotated with repeated alternation of a slope-down direction in which the blade portion slopes downward spirally in a vertical direction and a slope-up direction in which the blade portion slopes upward spirally in the vertical direction.

A sweep auger system having a driveshaft with auger fighting and a backboard extending a length from an inward end to an outward end. An input of a gearbox is connected to an outward end of the drive shaft and a sweep wheel having a plurality of notches, arms and feet is connected to an output of the gearbox. A drive shield is placed around a rearward side of the sweep wheel that forms a channel that is configured to capture grain agitated by the drive wheel. A guide plate is connected to the gearbox and covers a portion of the gearbox. The guide plate angles from an upper outward edge downward and forward to a lower inward edge that is configured to urge the grain captured within the channel of the drive shield to move in front of the sweep auger system reducing grain left in the grain bin.

A pressure sealed elevating conveyor for non-ambient temperatures having a pressure sealed shroud allowing lifting of a material while in a pressure sealed environment. In some embodiments, the pressure sealed elevating conveyor has structural details that allow the pressure sealed elevating conveyor to be used at very high or very low temperatures.

The present document presents a system and a method for packaging powders in containers (S) through a hopper (T) and a first tube (TC) connected to the hopper (T). Air is sucked both in the area of the first tube and in the area of the hopper. The powder is then drawn directly from inside the hopper thus keeping the flow rate and the degree of compacting of the system constant. Moreover, the powder sucked inside the first tube is thus compacted and can be conveyed compacted towards the outlet. In this way it is possible to control the dosing of the product exiting from the system with high precision.

In a sheet manufacturing apparatus which includes an installation unit on which a container that stores a powder is installed and which manufactures sheets including the powder and fibers, the installation unit includes an inlet for receiving the powder from the container, and a first shutter for opening and closing the inlet, the first shutter is capable of moving between an open position at which the inlet is opened and a closed position at which the inlet is closed in accordance with attachment and detachment of the container with respect to the installation unit, and the first shutter is provided with a plurality of shutter members and, at the open position, the plurality of shutter members are stored overlapping one another.

A structure of material feeding device is provided for avoiding material obstruction. In the material feeding system, a motor is adopted to drive material feeding member to spin in a material feeding silo. By using mechanical stirs, the blocking phenomenon of material is mitigated and thus achieving the purpose of avoiding material obstruction. According to the present invention, the first material feeding silo is connected with a first screw feeder for conveying materials. The first screw feeder is also connected to a second material feeding silo. The second material feeding silo is connected with a pipe. The pipe includes a first sealing valve and a second sealing valve for keeping the pipe sealed and thus avoiding contamination. Finally, the pipe is connected with a second screw feeder, which feeds materials into a vessel. Then a complete conveying line is formed for facilitating industrial production.

A feeder for bulk solids has a rotatable bin with an open bottom and an open top and is tilted so that one side of the bin is substantially vertical. A rotating auger is located within the bin having a vertically oriented exposed helical fin. Longitudinal ribs are secured on an inner surface of the bin and spaced radially. Material is loaded into the open top of the rotating bin, tumbling the material toward the bottom of the bin causing the material to constantly contact the rotating auger. The auger then feeds the material through the open bottom of the bin. Ribs engage the material in the bin enhancing tumbling and feeding.

In a sheet manufacturing apparatus which includes an installation unit on which a container that stores a powder is installed and which manufactures sheets including the powder and fibers, the installation unit includes an inlet for receiving the powder from the container, and a first shutter for opening and closing the inlet, the first shutter is capable of moving between an open position at which the inlet is opened and a closed position at which the inlet is closed in accordance with attachment and detachment of the container with respect to the installation unit, and the first shutter is provided with a plurality of shutter members and, at the open position, the plurality of shutter members are stored overlapping one another.

A sweep auger system having a driveshaft with auger flighting and a backboard extending a length from an inward end to an outward end. An input of a gearbox is connected to an outward end of the drive shaft and a sweep wheel having a plurality of notches, arms and feet is connected to an output of the gearbox. A drive shield is placed around a rearward side of the sweep wheel that forms a channel that is configured to capture grain agitated by the drive wheel. A guide plate is connected to the gearbox and covers a portion of the gearbox. The guide plate angles from an upper outward edge downward and forward to a lower inward edge that is configured to urge the grain captured within the channel of the drive shield to move in front of the sweep auger system reducing grain left in the grain bin.

A pressure sealed elevating conveyor for non-ambient temperatures having a pressure sealed shroud allowing lifting of a material while in a pressure sealed environment. In some embodiments, the pressure sealed elevating conveyor has structural details that allow the pressure sealed elevating conveyor to be used at very high or very low temperatures.