Abstract: Disclosed is an apparatus and method for the packaging of salable articles. The articles to be packaged are placed within spaced holders carried by an endless belt which advances the article through the apparatus while various operations are being performed thereon. A drive mechanism advances and periodically interrupts movement of the endless belt and operates a display card transfer mechanism. Movement by the transfer mechanism is in two directions, vertically, to pick up a display card from a supply and subsequently place it in juxtaposition to the article in the holder, and horizontally whereby a display card is transferred from the supply to a position over the conveyor belt and holder. Simultaneous with the placement of the display card in juxtaposition to the article, one or more labels are applied to an article and display card positioned in another holder to form a package. At least one of the labels is preformed in order to better conform to the contours of the article and display card.

Abstract: Disclosed is a method of packaging asbestos fibers wherein damp asbestos fibers are consolidated into blocks having a density of at least about 100 lbs./cu. ft. (PCF). These blocks can then be stacked on pallets, pulpable pallets if desired, and secured to said pallet with various means, for example with a shrink film, to produce a clean, compact package. At the point of use, the blocks are disintegrated using a block-breaker and the resultant pieces are then opened into a loose mass of asbestos fibers in a conventional opening apparatus.

Abstract: Multiple rows of nestable containers are continuously filled with product and sealed with a cover structure. Every other container in each row is inverted and the container inversion is alternated between rows to produce alternate rows of alternately inverted containers which are accumulated into nested groups. Cardboard support blanks are fed beneath the container groups in timed relationship with their accumulation into groups. Each group and cardboard support are simultaneously conveyed from the accumulation area to position the group on the cardboard support and form an assembly. The assembly is enveloped in a sheet of heat shrinkable film which is shrunken about the assembly to complete the package.

Abstract: A method and apparatus for forming individual containers from a length of an unexpanded continuous tube of expandable net-like material having an open end portion and a length several times longer than the length of the individual containers to be formed therefrom wherein a working length of the unexpanded continuous material is expandably opened by expansion means defining a container forming cavity; a container forming length portion of the continuous material, including the open end portion which is closed, is turned inside-out by placing goods to be packaged in the container forming cavity to cause the container forming portion to be located and expanded in the cavity with the closed end at the bottom of the cavity; and the end of the container forming portion containing the goods opposite the closed end is then severed from the continuous tube of material to form a separate individual package of goods.

Abstract: Disclosed is an apparatus for closing open-topped flexible containers, the apparatus being of the type having a pair of movable gathering arms which can gather and compress the flexible material to a configuration, and at an appropriate location, suitable for applying a fastener to the gathered material. The gathering arms cooperate with fixed guide means to sweep the flexible material to the gathered location. The gathering arms and the guide means are shaped, and positioned relative to one another, such that, at each location in the motion of the gathering arms, they make at least a right angle with respect to both the adjacent guide means and each other, thereby reducing the possibility of damaging shearing action on the flexible material.

Abstract: Packaging method and apparatus for positively nesting a plurality of individual pieces or articles in a nesting media for containerizing or storage. This nesting media comprises a base member of permanently deformable material such as cellular polystyrene. The individual pieces to be nested are initially placed on the upper surface of the base member in a desired oriented position relative to each other. Thereafter, the base and pieces are conveniently moved along a work path which includes a movable force member disposed thereabove over a portion thereof. As the base member is moved beneath the force member, the force member is moved toward the work path and base member a distance sufficient to engage the pieces or articles and force them at least partially into the base, thus creating the nested relationship between them. The force member is then moved away from the work path and base member in preparation for receiving another base member with pieces or articles positioned therein.

Abstract: A device for applying a section of pressure sensitive tape as a cover over the surface of a test tray having a multiplicity of upwardly open wells comprises a base having a sealing zone intermediate a tray loading zone and a tray removal zone. The tray is placed on a slide guide at the loading zone and moved to the sealing zone where a rotatable resiliently surfaced feed roller presses the leading end of the tape upon and along the top surface of the tray while moving the tray through the device.

Abstract: A harvester-thresher has a frame adapted to be pulled along the ground and formed with a forwardly-opening slot which is flanked by a pair of flailing elements that are displaced back and forth relative to this slot without cutting or pulling up this crop in order to thresh grain or the like from a crop passing upwardly through the slot. The flailing elements can be a pair of vibratorily reciprocal elements operated by a crank arrangement. It is also possible to use a pair of rotatable supports which each carry a pair of polygonal-section rollers that are orbited next to the slot and are themselves rotated about their own axes to flail the grain off the crops. The two assemblies are interconnected by a pair of gears and the individual rollers are themselves rotated by means of a V-belt or an internal gear connected to the ends of these rollers.

Abstract: Disclosed is a high speed binding device wherein a package wound with a binding thread is fixed to a flange of a flyer with its thread-winding axis in parallel with the rotation axis of said flyer and the binding thread is drawn out in the direction of the winding axis; and thereafter said binding thread is passed through a first tensioner for imparting to the binding thread a back tension decreased with a rise in the rotation speed of the flyer and then through a second tensioner for imparting to the binding thread a back tension increased with a rise in said rotation speed, thereby to cause said decrease in the back tension to be offset by said increase in the back tension, thus to bind, with a substantially constant back tension, the binding thread about the outer periphery of an element assembly passing through a through hole coaxially bored through the flyer.

Abstract: Thermoplastic yarn ends are spliced by overlapping side-by-side and spinning with an air jet circumferentially around a longitudinal axis of a cylindrical cavity with sufficient initial slack to insure engagement with the wall of said cavity. Heat is generated by the spinning action and concentrated in high twist nodal points giving rise to plasticization of the yarn and bonding of adjacent fibers. The spinning device has gripping elements for securing the yarn ends and introducing the necessary predetermined slack.

Abstract: A running yarn is spliced into a running tow by entangling filaments of the tow with and about filaments of the yarn with an air-jet device, the leading portion of the yarn is severed to leave a small protruding tail, and the tail is entangled within the tow with a second air-jet device. The air-jet devices comprise two halves which are separated and positioned on each side of the tow until a splice is to be formed; they are then closed to form cylindrical treatment chambers of diameters which impart a rounded shape to the tow, so that filaments are entangled about the yarn by the air jets. The air-jet devices are preferably designed to provide a forwarding action on the filaments.

Abstract: An improved bear down system for a yarn handling machine is described and claimed herein. A traverse element such as a spinning or ring rail, a spindle rail, or the like is provided with a power driven ball bearing screw which is connected to an upright arm or the like of a means to traverse the element up and down. Control means allows the system to automatically bear down the traverse element at the appropriate time at completion of building of yarn packages on yarn carriers on the machine. Thereafter, new carriers are placed on spindle receivers for same and the cycle is repeated. The bear down system may be operated manually to move the traverse element up or down as desired.

Abstract: A high-speed twisting machine for stranding wires or the like wherein there are a plurality of rotor units or assemblies, one on each side of a cradled take-off spool, each rotor unit consisting essentially of a rotatably driven hollow bearing tube with inlet and outlet openings for the transported wires in combination with open-ended concave guide pots attached at their base to the opposing faces or ends of the bearing tubes on either side of a cradled take-off spool, the outer peripheral guide surface of each pot being symmetrical around the machine axis to define a curved surface corresponding closely to the path of the transported wires taken off during normal twisting operation. The wire openings or bores near the end of the bearing tube must be located outside the curved guide surface of the guide pot connected to the same tube end to provide easy access and visibility.

Abstract: In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed obliquely of the rotor axis in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.

Abstract: This is concerned with a friction element for a false twisting apparatus for yarns, whereby a friction element consisting of a hard material has a longitudinal groovelike composition on the surface thereof extending parallel with the axis of rotation of the element.

Abstract: A friction false-twist device for texturing textile yarns of thermoplastic synthetic material comprises a main friction element mounted to rotate about a first fixed axis and formed as a sphere or ellipsoid with at least one circular groove centered on the axis, into which projects the rim of a friction disc rotatable about a second fixed axis parallel to the first. Yarn to be twisted is wrapped partially over the curved surface of the main friction element and past the edge of the friction disc to a yarn-guide unit adjustable over substantially half the curved surface of the main friction element at a constant distance from that surface. The yarn-guide unit includes a guiding disc which causes the yarn to deviate after leaving the main friction element. To avoid excessive yarn tension the guide unit is adjusted to provide a comparatively small wrap angle over the curved surface during threading, and is then adjusted to provide a larger wrap angle for effective twisting.

Abstract: Yarn of a fineness between Nm 60 and Nm 250 comprises fibres from the fur of angora rabbits. The fibres are pretreated with a two-component composition of an antistatic agent and an agent for increasing the adhesability of the fibres. The pretreated fibres, with or without other fibres such as synthetic fibres, are spun together with an uninterrupted carrier thread of a cross-section up to one third of the cross-section of the spun yarn.

Abstract: A four-sided, water-resistant watch-case comprising a caseband having a plane upper face, a crystal made of an inorganic material, an annular gasket inserted between the crystal and the caseband, and a bezel fastened to the caseband, partially covering the plane upper face, and holding the crystal in place, wherein the crystal comprises bevels along its periphery, and the bezel comprises a frame having inner faces in the form of ruled surfaces generated by lines perpendicular to said plane upper face, feet integral with the frame, projecting from the surface of the bezel facing the caseband and engaged in openings in the plane upper face, and claws projecting inwardly from opposite sides of the frame, the inner faces surrounding the gasket over at least part of its thickness, and the claws pressing upon the bevels in order to press the crystal against the gasket.

Abstract: A timepiece escapement has a balance carrying an eccentric pallet pin periodically and regularly oscillating forward and backward about a balance axis with the pin engaging on each forward oscillation between the teeth of an adjacent escape wheel so as angularly to step this escape wheel. The pin is engageable with the escape wheel through a predetermined lift angle which is equal to less than half of the engagement angle during which the pin is within the orbit of the teeth of the escape wheel and, therefore, prevents this wheel from rotating independently of the balance.

Abstract: An electro-mechanical sign which alternatively exhibits two different kinds of information, for example clock or sign display information, on two respective faces of several adjacent dihedral angles.

Abstract: A stationary power-generating plant of the type which includes a turboset comprising an axial-flow combustion gas turbine, an axial flow combustion air compressor and a driven machine such as an electrical generator which are all coupled together and mounted for rotation about a common axis. The driven machine is located within a hollow chamber surrounded by an intake duct which provides for a flow of combustion air to the compressor and the intake duct is arranged co-axially with the rotational axis of the turboset and is connected to the air inlet end of the compressor by means of a convergent conical annular duct thereby providing axial flow of air to the compressor inlet.

Abstract: An infrared suppression system is provided for an aircraft gas turbine engine for reducing the level of emitted infrared radiation from the engine exhaust. The hot exhaust stream emitted from the engine is mixed with the cooling airflows received from a plurality of sources in order to more effectively reduce the level of emitted infrared radiation. In addition, the infrared suppression system prohibits a direct line of sight back into the core engine.

Abstract: A system for heating the intake pipe of an internal combustion engine including a combustion equipment disposed adjacent to the intake pipe, a fuel supply system for supplying the fuel into the combustion equipment and an air supply system including an air pump for charging the air into the combustion equipment, the intake pipe being heated by the heat generated by the combustion of the air-fuel mixture in the combustion equipment. The fuel supply system includes a main fuel injection nozzle and an auxiliary fuel injection nozzle which is controlled by control means so as to start or stop the fuel injection depending upon the operating conditions of the engine. When the engine is started, both the main and auxiliary fuel injection nozzles inject fuel so as to attain the rapid heating of the intake pipe, but when the temperature of the intake pipe exceeds a predetermined level, the injection by the auxiliary fuel injection nozzle is stopped.

Abstract: A device for the after-burning of combustible components of engine exhaust gases, particularly for mounting on an engine block of an Otto engine, comprises a reactor housing which has an interior elongated reaction chamber. The reaction chamber is divided by a perforated bottom plate which extends across the reaction chamber and divides it into first and second chamber portions. An exhaust gas conduit is connected into the first chamber portion along with a secondary combustion air supply conduit, and the second chamber portion is connected to a treated gas discharge conduit for conducting away from the gases. The exhaust gas conduit is made very short and it has a flange thereon for mounting the device directly on the combustion engine block. The plate is perforated, and it includes one or more plate portions which permits the portions to be displaced relatively in order to accommodate any thermal expansion and contraction.

Abstract: A control system for plural motor driven pumps is disclosed. The control system includes a control valve which provides for unloading one pump by diverting the flow of operating fluid from that pump back to reservoir whenever the flow through the valve or the load pressure exceeds a preselected level.

Abstract: A mixed loop hydrostatic transmission circuit for use principally with orbit, gear, vane and other non-piston type motors, which generate contaminants making them less suitable for applications using conventional closed loop hydrostatic transmission circuits. The mixed loop hydrostatic transmission drive retains the precise load control and high efficiency of a closed loop system, while introducing the benefits of contamination control of open loop hydrostatic transmission circuits. While maintaining the speed of the motor proportional to the output flow of the pump, both in positive and regenerative modes of operation, the flow of fluid is diverted from the motor to an injector type inlet booster connected to the reservoir, which supplies the full flow of fluid, required by the pump.

Abstract: The invention is concerned with an improvement in a motor-pump assembly for operating a hydraulic implement, said assembly including a hydraulic pump for controlling flow of a hydraulic fluid to said hydraulic implement and an electric motor for driving said pump. The improvement comprises means for coaxially aligning a driving shaft of the motor with the driven shaft of the pump, means for directly drivingly engaging said driving shaft with said driven shaft and means for fixing said pump to said motor. The invention is particularly concerned with the case wherein said hydraulic implement comprises a hydraulic lift cylinder for adjusting the height of a fork carrying carriage of a lift truck, controlling the tilt of the lift truck mast and controlling power steering functions.

Abstract: A pressure force generator for machine tools is disclosed as having at least two pneumatically-hydraulically operated pressure multipliers in which the multipliers and their plungers are connected to a single high-pressure container containing a liquid.

Abstract: A solar energy converter uses gallium arsenide photovoltaic cells to convert light to direct current. Optical concentrators reduce the needed area of cells. Gallium arsenide retains high conversion efficiency up to several hundred degrees, so the waste heat may be used to produce mechanical power in a Rankine cycle engine.

Abstract: A solar heated device including a conduit for expansion and flow of gases, and a solar light collector for heating the gas in the conduit, is provided with a gas turbine that is driven by the gas as it expands as a result of the solar heating. The conduit may include an inlet for introducing air, or an inlet for introducing water spray (later steam), or both, thus supplying the gas which is heated and expanded in the conduit to drive the gas turbine. The light collector is preferably a parabolic reflector that directs sunlight on the conduit in order to heat and expand the gas therein. The turbine ordinarily drives an electric generator.

Abstract: A rotary displacer mechanism of the rotary-abutment type utilizes improved piston and sealing rotor design to reduce internal leakage and increase volumetric efficiency. A rotary-abutment positive displacement mechanism typically comprises a housing which encloses a rotary piston having a plurality of lobes and a cylindrical sealing rotor having a plurality of cavities for accepting the piston lobes during rotation. The improved piston design consists of a cylindrical stationary block around which only the lobes of the piston are rotatable. This design reduces bearing loads and allows for improved sealing characteristics. In addition, the sealing rotor is constructed with two axial sections of unequal diameter to provide a valving operation on either the intake or the discharge ports of the displacer, as required, and, at the same time, maintain communication between working volumes in the main rotor and sealing rotor bores.

Abstract: A matting, anchored to the ground surface of an enbankment adjacent a body of water for preventing erosion of said ground surface due to action of said water thereon, is so constructed that it provides less resistance to the flow of water therethrough in the direction from the ground surface toward the body of water than it does in the opposite direction from the body of water toward the ground surface. The preferential flow characteristic can be accomplished by providing the uppermost layer of the matting, facing the body of water, with a plurality of holes that are selectively covered by pressure responsive flaps. In the alternative, the preferential flow characteristic can be accomplished by providing the matting with plural layers of different fiber thickness and different pore spaces, with the uppermost layer of the matting having fibers of finest thickness and least pore spaces, and with the fiber thickness and pore spaces in the matting each increasing toward the base or ground side of the matting.

Abstract: Mobile shoring rig to be used during excavation of trenches for laying underground pipe of varying diameter, includes a self-propelled carrier movable at ground level straddling the margins of the trench. A shoring frame supported within the carrier is vertically movable relative to the carrier for raising and lowering the frame into the trench being straddled by the carrier. The shoring frame includes a plurality of individual sheets or plates carried by a frame which are vertically movable with and relative to the frame on a plurality of longitudinally spaced guideways. The plates are of varying width to span one or more of the longitudinally spaced guideways and are slidable thereon for vertical movement together with and independently of the shoring frame.

Abstract: A mine roof support of the type having a canopy supported from a base structure by hydraulically extensible legs and a cantilever roof-engaging member pivotally attached to the forward end of the canopy, is provided with a selectively positionable laterally extending cantilever member by means of which the effective roof-engaging surface of the canopy can be extended, the lateral cantilever member being optionally provided with a forwardly projecting cantilever member by means of which the effective width of the roof-engaging member can also be extended.

Abstract: A self-advancing support for use in the pit of coal or metal mine designed to support the pit roof after the mining operation by a shearer and having a mechanism for enabling the self-advancing support to be moved without using such means as a truck and a lift, said mechanism being housed within the self-advancing support and/or detached therefrom.

Abstract: A platform is raised from water level up to the tops of prepositioned template legs by means of jacking units comprising jacking mechanisms and jacking legs mounted near the upper ends of the template legs and extending down to the platform. Bridge beams of open framework construction span the distances between the upper ends of the template legs and these bridge beams provide support for the jacking units as well as reinforcement for the platform when it has been raised.

Abstract: In a cryogenic cooler, wherein a fluid under pressure is transmitted through an expansion orifice in a nozzle into an expansion chamber at a rate which is controlled by the movement of a needle valve in the expansion chamber, an expander member extends from the nozzle and carries the needle valve. The expander member expands and contracts in response to the temperature in the expansion chamber at a different rate than the needle valve to automatically regulate the flow of fluid into the expansion chamber.

Abstract: A method and apparatus provides conditioning of an air stream by cooling in a regenerative heat exchanger having two groups of channels separated from one another by walls through which heat exchange occurs. The air stream to be conditioned flows through one group of channels while an auxiliary air stream flows through a second group of channels the walls of which comprise wettable material maintained wet by means of water which is caused to evaporate by the auxiliary air stream to result in cooling. The wettable material provides a substantially stationary liquid layer maintained in the channels of auxiliary air flow so that evaporation takes place directly from the walls separating the two groups of channels to obtain high heat exchange efficiency.

Abstract: An automatic ice maker having a motor starting circuit that is unaffected by barometric pressure changes thus obviating the need for altitude adjustment of the ice maker. A mercury column thermostatic sensor is used to provide control that will be accurate regardless of the ambient or altitude pressure while also having the ability to rapidly reset, thus eliminating the need for a back contact thermostat. The sensor, upon sensing the last ice cube to freeze in the ice tray, opens so that a rectifier SCR will be switched to conducting, shorting out a diode bridge circuit and energizing the ice maker motor after which the basic ice maker circuits lock the motor in its running mode for one cycle of ice harvesting.

Abstract: A process is provided for the separation and recovery of a major portion of the C.sub.2 + hydrocarbon content of a feed gas comprising hydrogen, methane, ethylene, and ethane. The feed gas is introduced to a dephlegmator to effect its separation into a vapor stream and a condensate stream. The condensate stream which is rich in C.sub.2 + hydrocarbons is passed to a demethanizer column where it is fractionated into an overhead methane-hydrogen stream and a bottoms product ethylene-ethane+ stream.

Abstract: A damped vibration system includes a plurality of rotationally inert bodies arranged on a common axis of rotation facing each other with a small gap therebetween. Spring elements are provided between the facing bodies that are displaceable circumferentially with respect to the axis of rotation. Damping elements, preferably in the form of steel balls disposed in radial or circular grooves having sufficient clearance to permit relative angular movement between the facing inert bodies, are provided between the facing bodies. The apparatus is directly connectable to the crank-shaft of the internal combustion engine and also engageable with the drive train of a vehicle. The damped vibration system has a resonant angular frequency preselected to be a certain value below the angular frequency of ignition of the internal combustion engine.

Abstract: A process and apparatus for continuously supplying a textile machine, such as a circular knitting machine, with yarn under constant tension, the yarn being stored transiently and continuously in optimum amount on a negative feed drum type storage feeder, wherein when excessive tension arises during feeding lasting for only a short period (for example 3/10ths of a second) the restoring mode of the feed device is stopped whereby the existing supply of yarn on the drum will be fed to the needles. Additionally, when said excessive tension lasts for a period longer than the above short limit but at most equal to a middle limit (for example 3 to 30 seconds) the machine is temporarily stopped. In both cases reactivation of the feed drum so that the yarn can be restored to its optimum amount and restarting of the machine automatically occurs if the excessive tension is eliminated within the above time periods.

Abstract: A slide-fastener stringer foundation is formed of support tapes which are warp-knit. Two different types of weft filaments are used, one being textured and of limited shrinkability and the other being highly shrinkable. The tape so knitted is heat-shrunk so as to cause the shrinkable yarn to form the textured yarn into a mass of bulges or loops on the surface of the tape, thereby imparting to this tape a very smooth texture.

Abstract: An apparatus for effecting the coloration of synthetic textile materials, at a reduced pressure, by a transfer process which comprises a pair of opposed rigid platens mounted for relative movement towards and away from each other, means for heating at least one of said platens to a temperature above 100.degree.

Abstract: A sheet material decurling apparatus for use with a machine having a sheet conveyor comprises a trough member which includes two elongate, sheet supporting members, each having an arcuate upper surface with a radius greater than 250t, where t is the thickness of the sheet material. An elongate fillet, curved in the direction opposite to and joining the sheet supporting member surfaces, has a radius less than 15t. Further, the angle formed between the planes tangent to the sheet supporting member surfaces at the lines of transition therefrom into the fillet is in the range of 60.degree. to 120.degree.. A series of vacuum conduits are disposed in the trough member adjacent the bottom of the fillet and have a total cross-sectional area of approximately 0.07 inches square per linear foot of trough member. A vacuum pump is connected to the vacuum conduits to effect air flow downwardly through the trough member.

Abstract: The disclosure relates to a new procedure for the stretch reducing of tubular stock, in a manner to reduce the so-called crop end loss off of specification product at the ends of a tube section. In the process of the invention, a multi-stand stretch reducing mill is provided with a plurality of speed variable mill stands, at least at the upstream or entry end of the multi-stand mill. As the head end of a finite tubing section enters the upstream end of the mill, and as the tail or trailing end of the finite section enters the mill, programmed speed variations are made in the selected mill stands, to compensate for the fact that the head end or tail end sections of a finite length of pipe are acted upon at any given instant by fewer mill stands than intermediate sections of the tube.In the process of the invention, selected mill stands are speed controlled such that certain ones thereof apply maximum pulling force to the tube end section, while certain other mill stands apply maximum retarding force.

Abstract: A forming tool comprising a relatively rigid shank portion or holder mounting in bearing relation thereto and for limited rotation thereon an operating head. In the preferred embodiment illustrated the operating head is in the nature of a generally cylindrical body having a V-shaped notch. The formation of the notch in the cylindrical body produces thereon a pair of laterally spaced bearing surfaces for application to material to be worked, one of which functions as a fixing means and the other of which functions as a bending means.

Abstract: Force maintaining toggle systems wherein maximum or near maximum force is maintained by a series of step wise toggle engagements. The forces may be applied between spaced objects arranged oppositely or circularly.

Abstract: A method and apparatus for determining the behavior of a shock absorber arranged in a wheel suspension unit within the sprung-mass-system of a vehicle. The method includes measuring the static wheel load, causing the wheel to vibrate by applying forces to the wheel according to a predetermined relationship of amplitude or stroke to frequency, measuring at least one of the minimum and maximum value of the vertical contact force supplied by the wheel to a support surface while subjecting the wheel to such applied forces as an indication of the minimum and maximum wheel load, respectively. The measured minimum or maximum wheel load is then divided by the static wheel load so as to form a dimensionless factor which serves as an indication of the usability of the shock absorber. The apparatus includes devices for vibrating the wheel, measuring the necessary values and providing an indication of the dimensionless factor.

Abstract: In a first step, a chromatographic column is calibrated by passing separately through the column each constituent substance of the mixture to be analyzed and by recording at the exit the pulse response of said substance. In a second step, the mixture is passed through the columm and the total pulse response corresponding to the mixture is recorded. In a third step, the concentration of each substance is determined from the total pulse response corresponding to the mixture and the specific pulse responses of each substance.