Abstract: An assembly for heat treatment of a papermaking wire or felt comprises mutually opposing heating surfaces that are alternately offset in the direction of web travel and can be moved toward the felt/wire, thereby enabling one to obtain an ironing effect on both sides of the web simultaneously. The heating surfaces may constitute parts of respective box members whose interiors are formed for being heated by a heat medium, for example, hot oil.

Abstract: A pharmaceutical composition containing as active ingredient 5-aminosalicyclic acid or a pharmaceutically acceptable salt or ester thereof allow the treatment of colitis ulcerosa or Crohn's disease by oral administration. A particular slow-release tablet formation and its preparation is disclosed.

Abstract: The invention relates to a circuit for controllably driving an A.C. motor which includes a voltage supply with a pulse modulation regulator followed by an intermediate smoothing circuit and an inverse rectifier. Each phase of the inverse rectifier has two controllable load switching elements in series between two supply lines with each element being bridged by a recovery diode. The voltage of the intermediate circuit is adjustable by a desired value generator and the frequency of the inverse rectifier is adapted to follow the existing value of the voltage of the intermediate circuit. At least one phase of the inverse rectifier is associated with a braking circuit having a brake resistor between one phase connection and a brake connection which is disposed between two series connected brake switching elements disposed between the supply lines.

Abstract: A calcium sulfate anhydrite material is prepared from a spent absorbent resulting from desulfurization of flue gases. First the sulfite in the spent absorbent is oxidized into sulfate, preferably by heating in an oxygen containing gas, and thereafter the chloride content of the spent absorbent is reduced by heating the spent absorbent at a temperature of 600.degree.-950.degree., preferably 750.degree.-950.degree. C. together with fly ash. Said fly ash may be recovered together with the spent absorbent in the desulfurization process, or it may have been recovered separately and mixed with the spent absorbent.The product may be used as cement additive or for other purposes in which calcium sulfate anhydrite is conventionally utilized.

Abstract: A stepped grate for an incinerator plant consists of grate blocks (1) placed adjacent in rows, and placed in succession in the travelling direction of the refuse and garbage resting on parallel placed grate beams (9), where every second row of grate blocks (1) is adapted to make a reciprocating movement, whereas the intermediary rows of grate blocks are stationary. The movable and the stationary rows of grate blocks (1) are placed in staggered position in the travelling direction of the garbage at a distance corresponding to half the length of a grate block, the one type of rows being terminated with half grate blocks (8). Preferably, it is the stationary row that is terminated with half blocks (8). The displacement of the rows of grate blocks removes the danger of blocking the movable row of grate blocks caused by collision between the front edge of a grate block from the movable row and the rear edge of a grate block from the stationary row.

Abstract: Soft contact lenses are made by polymerizing a substantially anhydrous polymerization mixture containing a polymerizable acrylic or methacrylic monomer, and a water displaceable ester of boric acid and a compound containing 3 or more hydroxyl groups so as to form a hydrophilic polymer containing at least 30% of said boric acid ester. In a preferred embodiment, the polymerizable is effected in a mould cavity where the contact between a sharp circular edge in one mould part and a spherical surface in the other mould part defines the edge of the lens and the distance between the two mould surfaces outside the sharp edge increases in all radial directions away from the center.

Abstract: A powdered composition for use in dry sensitization for electroless metal deposition. The composition contains a hydrophobic thermoplastic material having deposited on its surface a surfactant and a sensitizing tin compound.

Abstract: Mooring systems for floating vessels positioned off-shore. A rigid column extends from the sea floor and provides a single-point mooring for a barge or other floating structure which includes facilities for storing oil or liquified gases. The barge may also include facilities for liquefying gases. A fluid line for oil or gas extends from below the water line inside the vertical column to the mooring point above the water line. A pair of mooring arms is pivotally attached to a table pivoted on the mooring point, and the arms diverge with their other ends attached to the barge at zones spaced from each other. The arms are extensible and each of them has a compensator which tends to hold each arm to a predetermined length. Each compensator also restrains the rate of movement during extension and contraction of its arm. A fluid-flow line extends from the mooring point to the barge with flexible interconnections between the fluid-flow lines above the water line.

Abstract: Gene products of plasmid DNA, such as proteins, are prepared in high yields by cultivating bacteria carrying a plasmid which shows a controlled constant plasmid copy number at one temperture and a much higher or totally uncontrolled copy number at a different temperature. The plasmid may be prepared by recombinant DNA technique using a cloning vector showing the temperature dependent plasmid copy number pattern.

Abstract: A means for recovering the heat of a room space and for ventilation, consisting of at least two heat accumulators, to which the outgoing air delivers its heat and from which the incoming air takes up heat, and each of which has one end connected to the room space outflow duct and inflow duct, in which ducts the direction of flow is always the same under control by a flap. The opposite ends of the heat accumulators have been connected to the fresh air intake duct and to the outgoing exit duct, in which ducts the direction of flow is always the same under control by another flap.

Abstract: When receptacles (1) having a substantially cylindrical side wall and a welding seam extending in the direction of the axis are to be angulary positioned it is known to rotate the receptacle about the axis and detect the passage of the welding seam past a probe and thereafter stop the receptacle a predetermined number of degrees after the detection. Provided that the receptacle wall is of a ferromagnetic material and that there is a substantial material overlapping at the welding seam the detection can take place by means of a magnetic probe for measuring the material thickness. However this method can not be used if there is only a slide material overlapping at the welding seam. In this case the use of a magnetic probe (11) urged against the receptacle wall (1) by spring means is suggested.

Abstract: A fluid bed dryer comprises a pre-dryer of the back mixed type and a post-dryer of the plug flow-type. In the pre-dryer the main part of heat is transferred to the product being dried by means of heating panels arranged above the bed plate. A control bed is interposed between the pre-dryer and the post-dryer and includes one or more temperature sensors for sensing the temperature of the product in the control bed. Heat supply to the heating panels is controlled in response to the temperature sensed by the sensor or sensors in order to maintain the product temperature in the pre-dryer at the dew point and so as to ensure that the drying process proceeds within the region of constant drying rate, and that the product contains little or substantially no unbound moisture despite possible changes in product fed to the pre-dryer.

Abstract: The invention comprises safety belt fastening means of the type having a locking tongue slideably engageable with a locking device. The locking device includes a locking flap releaseably engageable with the tongue, and release means for lifting and releasing the flap from engagement with the tongue; according to the invention, blocking means are provided which retain the locking flap in a raised position when the belt is unfastened, which resist initial releasing action to increase the necessary force for unfastening the belt, and which urge the locking flap into close engagement with the tongue on fastening the seat belt. The blocking means includes a blocking flap which coacts with the locking flap, and biasing means acting on the blocking and locking flaps.

Abstract: An incremental digital converter for converting two phase displaced signals of a pulse generator, which signals represent the position and direction of an object moved in two opposite directions, to a parameter which represents the position digitally. The converter includes a reversible position counter and a signal generator which derives from the phase displaced signals a direction signal for determining the counting direction of the counter and timing pulses to be counted by the counter.

Abstract: A device for positioning a magnetic head in a magnetic tape device includes a head carrier on which the head is mounted, a spiral gearing connected to the head carrier, and an operating device for rotation of the spiral gearing. The head carrier is disposed in a support system comprised of a first bearing rigidly disposed in the housing frame, a bearing plate adjustably attached to the frame and which can be positioned relative to a reference surface, and a second bearing disposed at the bearing plate.

Abstract: A vertical roller mill has a rotary grinding table (1), grinding rollers (3) and a nozzle ring (13) surrounding the table for providing an air stream to entrain ground material. Downstream of each roller is a scraper (20) with a nozzle for directing a blast of air onto the crushed material leaving the roller to break up the material so that finer fractions pass into the conveying air stream and coarser fractions are carried on the table to the next roller.

Abstract: An agglomerated powdery milk product is prepared by spraying a concentrate of milk or a fraction thereof into a stream of drying gas directed against the surface of a fluidized layer of already spray dried particles in a conical chamber, thereby obtaining a favorable interaction. Special parameters including temperatures, rates of streams of drying air and residence time are adjusted to obtain an extensively agglomerated product, high production capacity, improved heat economy, low heat damage of the product, and to make possible an easy spray drying of materials, which have hitherto been regarded as unsuitable for spray drying.

Abstract: In a tiltable or pivotal window in which the frame and sash side members that are perpendicular to the axis of rotation have oppositely facing abutment surface sections on either side of the axis area, said abutment surface sections merge smoothly into each other through an abutment surface section formed as a helical surface of about 180.degree.. A continuous weather strip may be provided on one or both of the abutment surfaces. If such strips are provided on both surfaces, they may be magnetic with opposite transverse polarization to improve tightness and minimize sliding contact between the strips in the helical surface area.

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: A process for converting human des-B30-insulin, namely ##STR1## into h-In-Thr.sup.B30 esters through amidation with an L-threonine ester in a mixture of water and a water miscible solvent in the presence of trypsin and optionally an acid.Yields in excess of at least 90% are obtained by limiting water content to 10%-30% v/v of the reaction mixture.