An apparatus for grinding particulate material comprising: a roller press having a pair of grinding rollers each having a rotation axis and being arranged oppositely and parallel to define a grinding roller gab in a common plane through the axes of the rollers, and a mechanical conveying device for conveying granular material to the roller press having a proximal end and a distal end relative to the roller press, the roller press being arranged at the proximal end of the conveying device. The conveying device is arranged to constrain a flow or mat of the granular material having in a cross sectional view a rectangular shape with a mid-plane and to transfer the flow or mat of granular material directly to the grinding roller gab of the roller press in a linear transfer plane being coincident with the mid-plane and perpendicular to the common plane through the axes of the rollers.

An apparatus for grinding particulate material comprising: a roller press having a pair of grinding rollers each having a rotation axis and being arranged oppositely and parallel to define a grinding roller gab in a common plane through the axes of the rollers, and a mechanical conveying device for conveying granular material to the roller press having a proximal end and a distal end relative to the roller press, the roller press being arranged at the proximal end of the conveying device. The conveying device is arranged to constrain a flow or mat of the granular material having in a cross sectional view a rectangular shape with a mid-plane and to transfer the flow or mat of granular material directly to the grinding roller gab of the roller press in a linear transfer plane being coincident with the mid-plane and perpendicular to the common plane through the axes of the rollers.

A tool for feeding material into a mill having a roller and forming a nip gap. The tool broadly comprises a baseplate, a guide plate, and a ram. The baseplate is configured to be positioned on the mill over the roller and forms a slot. The guide plate is configured to be positioned in the slot of the baseplate near the nip gap. The guide plate forms a chute for feeding the material into the nip gap. The ram is configured to be inserted into the chute to urge the material into the nip gap while preventing a user's fingers and other foreign objects from nearing the nip gap through the chute.

A hay bale feeder is described. Embodiments of the hay bale feeder include a frame, one or more bale support members, and a pair of spaced apart drum assemblies. The hay bale feeder can be implemented to shred a square hay bale. The hay bale feeder can typically be attached to a tractor or other vehicle. The pair of spaced apart drum assemblies can include a pair of drums having protrusions that are adapted to shred a square hay bale as the square hay bale is gravity fed to the pair of drum assemblies.

Apparatus for comminution of dried tea leaves, herbs and other dried plants and their component parts. The apparatus facilitates gentle comminution of the comminuted commodity. The apparatus includes arrangements of driven comminuting rollers and housing (1) with an overhead inlet (6) and a bottom outlet (7) for ground commodity, and may include at least two or more rotatably driven comminuting rollers (2, 3) arranged in at least two or more levels (4, 5) one above the other. The rollers (2, 3) are studded with cams (24) for a comminution operation. Combs (15) may interface with the comminuting rollers. Comb adjusters (23) facilitate adjustment of combs that are adjustable.

Apparatus for comminution of dried tea leaves, herbs and other dried plants and their component parts. The apparatus facilitates gentle comminution of the comminuted commodity. The apparatus includes arrangements of driven comminuting rollers and housing (1) with an overhead inlet (6) and a bottom outlet (7) for ground commodity, and may include at least two or more rotatably driven comminuting rollers (2, 3) arranged in at least two or more levels (4, 5) one above the other. The rollers (2, 3) are studded with cams (24) for a comminution operation. Combs (15) may interface with the comminuting rollers. Comb adjusters (23) facilitate adjustment of combs that are adjustable.

A drive arrangement for a roll crusher includes two rollers arranged in parallel, two trains, each for driving a roller. The two drive trains each has a gear transmission including a drive shaft which can connect to a motor and an output shaft which can connect with a roller. Each gear transmission includes an intermediate shaft arranged between the drive shaft and the output shaft. The intermediate shafts are connected to each other via a slip-free torque transmission device which allows an offset of the gear transmissions in relation to each other in combination with a torque limiting clutch which terminates the connection for a conjoint rotation of the intermediate shafts when an adjustable torque is exceeded.

A roller press arrangement, a connection device for movably attaching certain parts to the roller press and a method for more easily performing maintenance on such parts is disclosed. The roller press comprises a frame assembly and a force generation device. The force generation device configured to move so that it is removable when top members of the frame assembly are connected to the side members of the frame assembly and fixed in a closed horizontal position. The connection device for attaching a force generation device to the frame assembly comprises a mounting plate and a hinge. The hinge is rotatable so that the force generation device is removable when top members of the frame assembly are connected to side members of the frame assembly and the top members of the frame assembly are fixed in a closed horizontal position.

A roller press arrangement, a connection device for movably attaching certain parts to the roller press and a method for more easily performing maintenance on such parts is disclosed. The roller press comprises a frame assembly and a force generation device. The force generation device configured to move so that it is removable when top members of the frame assembly are connected to the side members of the frame assembly and fixed in a closed horizontal position. The connection device for attaching a force generation device to the frame assembly comprises a mounting plate and a hinge. The hinge is rotatable so that the force generation device is removable when top members of the frame assembly are connected to side members of the frame assembly and the top members of the frame assembly are fixed in a closed horizontal position.

A roller press (1) is described for grinding of particulate material such as cement raw materials, cement clinker and similar materials, which roller press (1) comprises two oppositely rotating rollers (2, 3) forming between them a roller gap (4) and a co-rotating annular disc (5), which in concentric manner is attached to an end surface (6, 7) of one of the rollers (2) by means of a number of resilient attachment elements (8) and being movable in the direction of the roller axis, where the outer diameter of said annular disc (5) is greater than the diameter of said one of the rollers (2), hence the annular disc (5) in the area of the roller gap (4) extends toward the other roller (3), thus covering at least part of the roller gap (4). The roller press (1) is peculiar in that the inner diameter of the annular disc (5) is smaller than the diameter of the roller (2), to which it is attached, thus overlapping the end surface (6, 7) of said roller (2), and that the resilient attachment elements (8) are evenly distributed over the circumference of the annular disc (5) and provided with spaces or openings (10) there between. It is hereby obtained that the annular disc (5) does not get stuck by material to be grinded or destructive forces damaging construction parts are not accumulated. This is due to the fact that material in the roller press (1) according to the invention is allowed to escape from the area between the annular disc (5) and the roller (2) to which it is attached.