Abstract: An adjusting apparatus of a feed opening of a crushing chamber of a crusher includes one or more adjusting parts arranged in connection with the feed opening, which one or more adjusting parts is/are movable during crushing for adjusting a flow area of material which is to be crushed and is flowing through the feed opening to the crushing chamber. The front edges of the adjusting parts form a unitary flow opening, the flow area of which is adjustable by moving one or more adjusting parts. An adjusting system includes the adjusting apparatus for a feed opening of a crushing chamber of a crusher. A method for adjusting a pressing crusher or a crushing plant suitable for mineral material crushing. A method for avoiding a start peak of a crusher. A method for limiting power intake and/or crushing pressure of a crusher.

Abstract: A method for grinding bevel gears (1), wherein a first grinding tool (2) is used during a first method section and a second grinding tool is used during a second method section. A measurement system (30) is used to carry out a measuring procedure, in which sampling values can be ascertained for at least a part of first flanks of the bevel gear workpiece (1), which enable a statement about the concentricity error of this bevel gear workpiece (1) in the present chucking. Concentricity correction dimensions are ascertained by computer on the basis of the sampling values, and an adaptation of machining movements of the second method section is performed on the basis of the concentricity correction dimensions.

Abstract: A milling device includes a grinding member, a table, a plurality of actuators and a controller. The table has a grinding surface. The table is positioned adjacent to the grinding member such that the grinding surface faces toward at least a portion of the grinding member. The table and the grinding member at least partially define a grinding chamber sized and configured to receive material. Each actuator is connected to the grinding member such that movement of that actuator causes at least a portion of the grinding member to move from a raised position to a lowered position to grind the material. The controller is connected to the actuators and is configured to cause the actuators to move in a sequence that causes the grinding member to wobble as the grinding member is moved by the actuators to grind material.

Abstract: A crusher apparatus which comprises a crusher device having an inlet for receiving a supply of crushable bulk material, and an outlet for discharging crushed material; and a feeder device arranged to feed the supply of bulk material to the inlet of the crusher device in which the feeder device is adjustable between an operative feeding position in which the bulk material can be supplied to the inlet of the crusher device, and an inoperative position to discharge the material, without being fed to the crusher device, e.g. when undesirable material is present in the material for supply to the crusher device.

Abstract: A device (1) for feeding a material processing plant (2) such as, in particular, a crusher, including an outer shell (3) and a bell (6), provided at least internally in the outer shell (3) and secured to the latter, the bell (6) being provided so as to be orientated substantially parallel to the direction of flow of the material in such a way as to enable the material to be diverted to protect members (9), provided downstream, of the plant (2).

Abstract: Rubber particles having textile and/or metallic inclusions are treated by first placing the particles on a support surface and then pressing the particles against the support surface in a direction transverse to the support surface with a surface of a press body exerting a pressure of in excess of 10 kg/cm.sup.2 without contacting the surfaces with each other. Both of the surfaces are nonsmooth. In accordance with the invention the support surface and the press body are relatively displaced in a direction generally parallel to the support surface to subject the particles to shear.

Abstract: A multi-purpose apparatus to prepare a road surface is disclosed. The apparatus includes a scoop which cuts, profiles and collects material. A conveyor connected to the scoop transports the material from the scoop to a rock crusher. The rock crusher reduces the size of the rock and deposits the crushed rock back on the road bed. An articulated bucket assembly is mounted on the apparatus to excavate overburden and to deposit the overburden into the scoop.

Abstract: A method and apparatus of comminuting ore-like material to produce a disproportionately large volume of flakier product which is easily and more efficiently ground in a mill, wherein the method includes the application of a stream of liquid all around the inlet of a conical crusher, increasing the speed and reducing the throw of the crusher to produce a generally flaky product, crushing the ore in the presence of the liquid and passing the ore and liquid slurry directly to a grinding mill.

Abstract: A cone crusher is provided for fine and superfine comminution and a high throughput performance. The largest open gap clearance between the crushing mantle and the crushing cone in the region of the crushing zone is not smaller than the grain size of the feed product to be comminuted as heretofore known, but larger than such grain size. A so-called stratified crushing occurs under the filling pressure of a relatively high column of feed product, wherein the grains of the feed product are not individually crushed per se between the crushing tools, but largely mutually crush one another in the crushing gap.

Abstract: A document shredder which comprises a strip cutter to cut waste document into strips, a chip cutter to cut the strips into chips, and a minuting device disposed downstream of the chip cutters to cut the chips into pulp-like mass. The minuting device includes a housing having a conical surface formed with cutting teeth, and a conical rotary body formed with cutting teeth in engagement the cutting teeth of the housing.

Abstract: A feeder distributor is mounted above an annular crushing chamber of a gyratory crusher and operates to distribute feed uniformly around the entire circumference rather than at one revolving point. A rotating cylinder has a rotating bottom plate of larger diameter connected to it by ribs leaving a circumferential opening between the cylinder and the plate. The circumferential opening is sized to prevent the flow of material when the cylinder and plate are not rotating. When rotating, the material is thrown off of the plate around the entire circumference of the plate by centrifugal force. This provides good continuous distribution of material around the entire crusher chamber regardless of the feed rate into the cylinder.

Abstract: A device for moving a rock lodged in a rock crusher which includes a support on which is mounted a first turntable. Connected to and extending from the first turntable is a second turntable the rotational axis of which is offset from the rotational axis of the first turntable. Also provided is a boom pivotally connected to the second turntable. The boom includes an extendable boom member slidably mounted in the main boom portion and on the end thereof a pivotal hook together with means for operating the turntables, boom and hook individually or in combination to place the hook adjacent a rock in a crusher and then move the rock to a position whereby the crusher can accept and crush it.

Abstract: A gyratory crusher in which a material distributing disc is disposed within supply conduit means at the top of the crusher housing and secured to the upper end of the crusher cone. The distributing disc is provided on its upper surface with upwardly projecting material guiding means.