Abstract: A roller device for roller trains or roller conveyors has a unit consisting of one side face of a load-carrying roller and a supporting shaft projecting from said side face and being non-rotatably connected to the load-carrying roller and adapted to support a drive pulley which is intended to be driven by a belt, chain or the like and can be passed on to the supporting shaft with any one of its ends facing said side face of the roller and which at one of said ends has coupling means adapted, when the drive pulley is mounted on the supporting shaft with one end facing said side face of the roller, to engage coupling means on the unit so as to provide a non-rotatable engagement between the drive pulley and the load-carrying roller, said drive pulley, at its other end, being so designed that when the drive pulley is mounted on the supporting shaft with the opposite end facing said side face of the roller, it comes clear of the coupling means of the unit and is rotatable on the supporting shaft.

Abstract: Oily waste is separated by gravity settling into a light oil phase forming an upper layer and a heavy phase forming a lower layer. An overflow stream of oil passes from the upper layer to a raw fuel storage tank while an underflow from the lower layer, after addition of diesel oil, is centrifugally separated into a light component of oil with some water which is returned to the gravity settling, an intermediate component of clarified water which is discharged to a sewer, and a heavy sludge component which is fed to a second centrifuge for separation into substantially dry solids and a mixture of water and residual oil which is returned to the gravity settling.

Abstract: An apparatus for regulation feed for gas consumption from a source with a variable gas production. The apparatus is characterized by two chambers (1, 2). These communicate in their lower parts with each other. At least the first chamber (1) is closed in its upper end. The lower part of the chambers (1, 2) is provided with a gas inlet (3) from said source for gas production and a gas outlet (5) to said consumer. In the second chamber (2) there is provided a means (15) regulated by the liquid level for starting and shutting off the gas consumer.

Abstract: Cheese curd is produced by coagulating a milk product during its passage through a long coagulator tube under renneting conditions giving a relatively slow coagulation course. The milk product is renneted in-line and the renneted mixture is fed periodically to the inlet end of the coagulator tube during feeding periods with intermediate stand still periods, the length of a feeding period being selected so that no essential coagulation occurs in the mixture from its introduction into the coagulator tube up to the successive stand still period, and the length of a stand still period being selected so that the mixture after having been subjected to one stand still period in the coagulator tube forms a sufficiently firm coagulum to be transported by feeding new mixture during the successive feeding period towards the outlet end of the coagulator tube as a continuous plug.

Abstract: From a row of objects which are conveyed on an intermittently movable feeding conveyor, every second object is deposited on lines of wrapping materials at a first station, which lines are advanced continuously under the feeding conveyor, and the remaining objects are deposited on the same lines of wrapping materials at a following station. In connection with one or both depositing steps. the objects are shifted transversely of the direction in which said lines are advanced. Thus, the number of lines of wrapping material is only half the number of objects in each row, whereas the distance between the lines will be increased so much that the lines may be sealed lengthwise and crosswise by means of rotating sealing means.

Abstract: In a compressor having at least two cooperating rotors of which at least one has a screw form, the medium to be compressed is supplied through a stationary inlet port located radially outside the screw-formed rotor at the meshing zone between the rotors, where new volume on rotation of the rotors is continuously formed for sucking the medium into the compressor. The inlet port extends in the axial direction of the screw-formed rotor with a substantially constant width and shows an area which is substantially in accordance with the sum of the cross-sectional areas of the grooves of the screw-formed rotor, which grooves communicate with the inlet port and in which the medium is transported further on into the compressor.

Abstract: A teat cup for a milking machine is provided with a liner (3) arranged within the teat cup and with connections (4, 5) for pulsating vacuum and milk transport vacuum. The teat cup has also a valve means in its lower part, which valve means is arranged to open and close a connection between the inner of the teat cup and the milk flow line.The valve means is arranged such that when the valve body is in the position where the connection is open, the through flow for the milk is unobstructed.

Abstract: A stackable load carrier for transporting and furnishing objects comprises an open-top box-like member which has a side wall and a bottom from which there extends downwardly a frame having, on the one hand, two opposed similar open recesses extending from the lower edge surface of the frame substantially up to the bottom and adapted to permit the insertion of at least one fork of a hand-lift truck or the load-carrying part of a sack trolley underneath the bottom, and, on the other, two opposed similar windows laterally spaced apart from the recesses and arranged to permit the insertion of at least one fork of a fork-lift truck or the load-carrying part of a sack trolley underneath the bottom. One or more shoulders or projections disposed on the outer side of the side wall or the frame above or on a level with the upper edge of the windows are arranged for abutting engagement with the lower frame edge surface of another load carrier telescopically stacked on the first load carrier.

Abstract: In the operation of a refrigeration system comprising a compressor, a condensor, an expansion valve and an evaporator which form a circulation circuit containing NH.sub.3 refrigerant as a first medium, the compressor being lubricated by a second medium, oil, part of the oil quantity being continuously discharged from the compressor together with compressed NH.sub.3 -gas into the circulation circuit for recirculation of oil to the compressor, continuously or batchwise, from the low pressure region of the circulation circuit, that is, the region located between the expansion valve and the compressor, the part of the oil transferred to the low pressure region (5, 6, 8, 9, 10, 11) of the circulation circuit is contacted with a third medium, added to the circulation circuit and which is substantially insoluble in liquid NH.sub.

Abstract: The invention provides a breakover detection device for use with a centrifugal separator. The device comprises a main chamber, a float in the main chamber operative to actuate switch contacts in response to the presence of liquid in the main chamber, an inlet and outlet for the main chamber arranged so that small volumes of liquid trickle from the inlet to the outlet without activating the float and large volumes of liquid at least partially fill the main chamber, thereby activating the float, electrodes in the main chamber for connection to circuitry discriminating between different liquids detected by the float in the main chamber. The device can detect the occurrence of breakover in a centrifugal separator, without leading to shutdown solely as a result of an increase in volume of the separated liquid.

Abstract: A strainer device for purification of pulp suspensions comprises a strainer drum with a cylindrical mantle provided with strainer openings. Between the strainer openings are inclined surfaces forming an angle with the flow direction of the suspension, in order that particles contacting the surfaces are given a component of movement radially outwards.

Abstract: In a method and an apparatus for safe-guarding a press (1) by monitoring the press motion, use is made of the fact that the force exerted by the press is an almost invariable function of the position of the upper press platen in relation to the lower press platen. The force exerted by the press is continuously sensed during each pressure stroke by means of transducers (6). The instantaneous value of the force is compared in a monitoring unit (10) with a reference force value, calculated during the first pressure stroke, at each one of the subsequent positions of the upper press platen of the press in relation to the lower press platen thereof. This comparison is repeated for each such position during the pressure stroke. The monitoring unit (10) directly interrupts the press motion if, on comparison, the sensed force value in any position deviates from the reference force value by more than a predetermined amount.

Abstract: A multiple hydrocyclone separator comprises a pair of spaced concentric standpipes mounting a series of mono hydrocyclones each having a body containing a separating chamber and provided with first and second cylindrical external parts on opposite ends of the body. The body has a tangential inlet to the chamber and a first axial outlet formed by a third part screwed into the larger end of the body, the body forming a second axial outlet at its smaller end. Sealing rings are located in grooves in the respective cylindrical parts and seal against the walls defining openings in the respective standpipes. To secure the body, a nut on its smaller end clamps the adjacent standpipe against a collar of the body. Thus, the cylindrical part at the larger end of the body can slide with its sealing ring in the hole of the corresponding standpipe, thereby accommodating thermal expansion and contraction of the body while maintaining the sealing action of the sealing rings.

Abstract: A heat exchanger comprises a plurality of plates arranged adjacent to each other and provided with mutually corssing corrugation patterns of ridges and grooves which form supporting areas in which the plates abut each other. According to the invention, at least some of the heat exchange passages are defined by plates at least one of which has recessed supporting areas, whereby the volume of the passage is reduced.

Abstract: In a process for sterilization of liquids like milk, containing gases such as air and carbon dioxide and microbes, a microbal enriched partial stream is separated by centrifugation and is degassed in a first step, whereupon the so treated partial stream is heated for sterilization and is then remixed with the rest of the original stream. The novelty is constituted by the manner of heating said partial stream, namely by injecting it in finely divided form into a closed container in which there is provided a steam atmosphere, the stream being discharged with level control from said container, whereas the remaining gas is separated and is discharged through an extra outlet.

Abstract: Liquid forming an annular body in a rotating housing is removed therefrom by a stationary paring device with an annular part adapted to extend substantially radially into said body and having a channel for draining liquid from the housing. Sunken into a surface of the annular part is an opening forming an entrance to the channel, and liquid flows in through said opening along a path located at a substantially constant radius from the rotation axis, the opening having a sloping bottom for guiding the liquid into the channel. In that portion of the annular part which is immersed in the liquid body, said channel extends in a plane substantially parallel with said surface of the annular part.

Abstract: Each plate of the heat exchanger has the usual groove for receiving a gasket; but the latter is secured to the plate at fastening points spaced from each other and located outside the sealing area defined by the groove.

Abstract: In a heat exchanger comprising a plurality of plates arranged adjacent to each other and provided with turbulence-generating corrugations, sealed passages for two heat exchanging media are enclosed between the plates, and two heat exchanging media flow through the passages in mutually inclined flow directions. In order to provide different thermal properties of the passages for the two media, the corrugations on an average extend at a wider angle relative to the flow direction of one of the media than to that of the other medium.

Abstract: A valve for connecting two flexible hoses of a milking machine to a milk line and a vacuum line, respectively, comprises a housing containing two opposite valve seats and a rotatable slide having sealing surfaces cooperating with said seats. The slide is provided with a recess for receiving a connection piece connected to the hoses and having sealing surfaces cooperating with the valve seats. The connection piece is rotatable together with the slide between a connected position in which the hoses are connected to their respective pipe lines, and a disconnected position in which these connections are shut off by the slide. The valve housing is preferably attached to one of the pipe lines and connected to the other one by means of a flexible hose.

Abstract: The rotor of a centrifugal separator has at its periphery a plurality of valves for discharging medium from the interior of the rotor, which interior communicates with the valves through channels. Each valve is opened by a slot through a sleeve-formed section of a first part being uncovered by an edge of a second part of the valve. When the valve is closed, it is kept tight by said edge being pressed against an abutment surface of a seat.