Patents Assigned to Luwa AG
-
Patent number: 5931376Abstract: The description relates to a device for air conditioning control in an air-conditioned room containing textile machines, especially circular spinning and spooling machines, with an air feed and an air discharge duct connecting the air-conditioned room to the air conditioning unit. A first set of sensors for measuring the temperature and relative humidity of the air in the room is connected for the control purposes to a first regulating circuit, and a second set of sensors for measuring the temperature and relative humidity of the feed air is connected for control purposes to a second regulating circuit. The first and second regulating circuits are connected in cascade, the first regulating circuit supplying a reference value to the second regulating circuit which controls the adjusting components of the air conditioning unit.Type: GrantFiled: May 6, 1997Date of Patent: August 3, 1999Assignee: Luwa AGInventor: Urs Meyer
-
Patent number: 5666996Abstract: An air channel extends parallel to and underneath the straight runway of a travelling cleaner, and the runway and air channel extend above a row of weaving machines. Provided above each weaving machine on the underside of the air channel is a downward-directed piston-flow outlet which is supplied with suitably conditioned air by the air channel. Provided in the floor underneath each weaving machine is an air outlet which is connected to a suction channel. Via an air-treatment system, the air returned from the suction channel, after being filtered and conditioned as necessary, is fed into the air channel again. The air channel and the runway extend in parallel relation with respect to each other, form a unit, and are jointly supported.Type: GrantFiled: December 16, 1994Date of Patent: September 16, 1997Assignee: Luwa AGInventors: Walter Bollier, Arnold Keller
-
Patent number: 5651802Abstract: A fluid filter is provided for separating entrained particulate matter from a moving fluid stream. The fluid filter includes a filter structure for mounting the filter on a supporting surface, a plurality of nested filter frames, and a filtration medium carried by each of the filter frames. The filter structure has a fluid inlet and a fluid outlet for conveying the fluid stream therethrough. The nested filter frames are located within the filter structure in spaced-apart relation to each other. The filtration media are interposed between the fluid inlet and the fluid outer of the filter structure, and define on one side thereof an upstream filter surface and on the other side thereof a downstream filter surface.Type: GrantFiled: September 15, 1995Date of Patent: July 29, 1997Assignee: Luwa AGInventors: Jerry T. Carter, Josef Rutishauser
-
Patent number: 5472018Abstract: A process for the air conditioning of a weaving machine includes generating, for the weaving machine, at least one conditioning air stream spaced from a warp of the weaving machine and directed towards the warp, and distributing the conditioning air stream in stages so as to form a downwardly directed displacement-type flow towards threads of the warp. The displacement-type flow is a non-turbulent, uniform flow over a cross-sectional profile of the flow.Type: GrantFiled: August 18, 1993Date of Patent: December 5, 1995Assignee: Luwa AGInventors: Pavel Verner, Walter Bollier
-
Patent number: 5453117Abstract: The invention is a fluid filter and method of separating entrained particulate matter from a moving fluid stream. The fluid filter includes a filter structure for mounting the filter on a supporting surface, a plurality of nested filter frames, and a filtration medium carried by each of the filter frames. The filter structure has a fluid inlet zone and a fluid outlet zone for conveying the fluid stream therethrough. The nested filter frames are located within the filter structure in spaced-apart relation to each other. The filtration media are interposed between the fluid inlet zone and the fluid outlet zone of the filter structure, and define on one side thereof an upstream filter surface and on the other side thereof a downstream filter surface.Type: GrantFiled: March 22, 1994Date of Patent: September 26, 1995Assignee: Luwa AGInventors: Jerry T. Carter, Josef Rutishauser
-
Patent number: 4900179Abstract: The mounting cross-piece or node assembly serves for the leak-tight connection of the cut ends of profile sections with one another. These profile sections are provided with an upper lengthwise extending opening and thus form a support or carrier construction or framework in the form of a grid or grid structure suspended at the ceiling of a room, especially a clean room. Filter frames and clean room filters can be mounted in gas-tight fashion in the grid structure. The mounting cross-piece assembly comprises at the cut surfaces of the profile sections to be interconnected and at the sides of the mounting cross-piece confronting such cut surfaces connection elements which can be secured in both of these components.Type: GrantFiled: January 25, 1988Date of Patent: February 13, 1990Assignee: Luwa AGInventor: Walter Kundert
-
Patent number: 4768443Abstract: The working apparatus, useful as a cleaning apparatus for textile machines, comprises a mobile servicing or working unit possessing a ventilator cooperating with air guide elements and operates in cleaning zones located at these textile machines. The servicing unit is movable on a track or rails. A stationary drive motor provides the relatively high power drive for the travel motion of the servicing unit along the track and for the ventilator by means of an endless belt trained over transmission members arranged at the servicing unit. These transmission members each contain different size coaxially arranged pulleys. By changing the position of one strand or run of the belt from a smaller size to a larger size pulley and vice-versa, the direction of movement of the travelling servicing unit can be selectively reversed. The movement of the servicing unit is monitored by a control device arranged at the servicing unit with the aid of terminal or limit switches and sensors.Type: GrantFiled: November 12, 1986Date of Patent: September 6, 1988Assignee: Luwa AGInventors: Bruno Bruggisser, Walter Gehrig
-
Patent number: 4693904Abstract: A process and apparatus for continuously sterilizing a cocoa paste, wherein the cocoa paste is subjected to a thin layer continuous treatment of deacidification, dehumidification and degasification in a thin layer device prior to delivery to a sterilization reactor. Following sterilization and cooling, the treated cocoa paste is conveyed to a second thin layer device for residual deacidification, dehumidification and degasification. While in the sterilization reactor, the cocoa paste is heated by mechanical mixing, generating a temperature in the range of 100.degree. C. to about 150.degree.C. which is necessary for degermination. The degermination temperature is held at its average value by an external heat exchanger. A cooling device is connected to the sterilization reactor at the outlet side thereof for cooling the treated cocoa paste to below 100.degree. C. before being conveyed to the second thin layer device for further treatment.Type: GrantFiled: February 2, 1984Date of Patent: September 15, 1987Assignee: Luwa AGInventor: Armin Schmitt
-
Patent number: 4557956Abstract: A container made of deformable sheet material comprises two panels generally facing one another and having perimetric edge zones bonded fluidtight to one another. In at least one of the panels deformation-enhancing corrugations are provided whereby the container is expandable from a flat state into an inflated state. The container may have a filler unit which comprises a tubular nipple attached to the container; a closure cap received on an outer end of the tubular nipple; a collar attached to the inner circumferential surface of the tubular nipple at an end thereof oriented towards the container; a breakable closure disc extending across the flow passage and having a circumferential edge zone in engagement with the collar; and an inner ring threadedly engaging the inner circumferential surface of the tubular nipple and pressing the breakable closure disc against the collar.Type: GrantFiled: December 21, 1983Date of Patent: December 10, 1985Assignee: Luwa AGInventors: Fritz Volpert, Hans-Werner Stocker
-
Patent number: 4446781Abstract: A process and apparatus for continuous mechanical/thermal treatment including sterilization of fluids and pastry masses such as cocoa masses. In accordance with the invention, a fluid or cocoa mass is subjected to a thin layer continuous treatment of deacidification, dehumidification and degasification in a thin layer device prior to delivery to a stow or sterilization reactor. Following sterilization and cooling, the treated cocoa mass is conveyed to a second thin layer device for residual deacidification, dehumidification and degasification, while in the stow or sterilization reactor, the cocoa mass is heated by internal friction, generating a temperature in the range of 100.degree. C. to about 150.degree. C. (preferably 135.degree. C.) which is necessary for degermination. The degermination temperature is held at its average value by an external heat exchanger.Type: GrantFiled: March 19, 1982Date of Patent: May 8, 1984Assignee: LUWA AGInventor: Armin Schmitt
-
Patent number: 4389931Abstract: A substantially funnel-shaped constricting fiber chute or shaft possesses at its lower portion blade springs forming a diaphragm or the like. These blade springs extend at an acute angle with respect to the lengthwise axis of the fiber chute. At their free ends these blade springs delimit an exit or outlet opening, by means of which the fiber chute opens into a container, such as a bag or sack or the like which is exchangeably secured at such fiber chute. A driveable plunger arranged coaxially with respect to the fiber chute possesses a plunger head which tapers in the outlet direction. The plunger head possesses a toothed or serrated band. Upon penetration of the plunger into the fiber chute or shaft the plunger head compacts fibers which have collected in the fiber chute and expresses such, while further compacting the same, into the sack. The equipment is particularly suitable for use at a fiber separator at which the fibers separated from a transport air current or stream drop into the fiber chute.Type: GrantFiled: July 20, 1981Date of Patent: June 28, 1983Assignee: Luwa AGInventor: Hanspeter Sutter
-
Patent number: 4382401Abstract: In the openings at the side wall of an infeed or inflow channel there are inserted outlet or discharge elements having an oval cross-section which continuously tapers in the flow direction. The inlet-side portion of the outlet elements, protruding into the interior of the infeed channel, possesses an outwardly drawn or flexed end portion or section which terminates in spaced relation from the channel side wall and forms therewith a catch trough. Within this trough there is entrapped water which is deposited at the inner surface or wall of the infeed channel and which flows downwardly along the channel side wall. At the outlet side of each outlet or discharge element there is arranged a further catch trough which extends at the inner surface of the outlet side or opening along the circumference. This inwardly open catch trough is formed by an end portion or section of the outlet element which is flexed or bent back towards the inside.Type: GrantFiled: August 13, 1980Date of Patent: May 10, 1983Assignee: Luwa AGInventor: Paul Simmler
-
Patent number: 4361006Abstract: A spinning frame having a frame mount, a plurality of spindles and, suction elements for each spindle, a ventilating fan arranged in the frame mount and connected to the suction elements, and a filter on the pressure side of the ventilating fan, the filter forming at least part of the rear wall of the frame mount, and including pneumatic cleaning means for the filter, said cleaning means including a suction arm which is movable along the filter and is connected to a suction device.Type: GrantFiled: June 30, 1980Date of Patent: November 30, 1982Assignee: Luwa AGInventors: Hermann Gasser, Karl Curiger, Peter Novak
-
Patent number: 4357793Abstract: For automatic feeding of slivers through drawing rollers there is provided a sliver-processing frame having drawing rollers, tubes for conveying slivers to be drawn and a plurality of suction elements connected to a common source of low pressure wherein the drawing rollers are enclosed in a casing of which the interior is connected to the source of low pressure the casing having inlet orifices for admitting cleaning air to the surfaces of the drawing rollers, one end of each tube leading into the casing.Type: GrantFiled: June 30, 1980Date of Patent: November 9, 1982Assignee: Luwa AGInventors: Hermann Gasser, Karl Curiger, Peter Novak
-
Patent number: 4350007Abstract: The spindles of a flyer spinning frame are each mounted in respective chambers which are defined by telescopically slidable rings. The lowest ring on each sleeve is sealingly fixed on a spindle rail, while the uppermost ring on each sleeve is attached to a common, vertically movable support. The chambers, which are open at the top, are connected to the suction side of a ventilating fan by ducts, which extend through the spindle rail, and by flexible lines.Type: GrantFiled: June 30, 1980Date of Patent: September 21, 1982Assignee: Luwa AGInventors: Hermann Gasser, Karl Curiger, Peter Novak
-
Patent number: 4332130Abstract: An apparatus for infeeding textile band material to a consumer, especially for infeeding a sliver deposited in a can to a spinning machine, comprising a transport tube extending between a feed location and a consumer. There is provided means for generating, within the transport tube, an infeed flow or current which flows in the direction of the consumer. Also, holder means are operatively correlated with an inlet opening of the transport tube in order to hold a starting portion of the sliver or other band-like material, such holder means enabling seizing of the starting portion of the sliver with the aid of the infeed flow.Type: GrantFiled: June 30, 1980Date of Patent: June 1, 1982Assignee: Luwa AGInventors: Hermann Gasser, Paolo di Benedetto, Johann W. Ferri
-
Patent number: 4329840Abstract: In a method of and apparatus for feeding a tow to a textile machine, the leading end of the tow is automatically twisted by a vortical gas flow during transport through a tube to the machine. Preferably the vortical gas flow is also used to draw the tow through the tube.Type: GrantFiled: June 30, 1980Date of Patent: May 18, 1982Assignee: Luwa AGInventors: Hermann Gasser, Paolo Di Benedetto, Johann W. Ferri
-
Patent number: 4325781Abstract: In a vessel (1), several mutually parallel evaporator tubes (2) are arranged which, on their outside, are surrounded by heating steam introduced into the interior (1a) of the vessel. A coaxial displacement body (3) is arranged in the interior of the evaporator tubes (2). A gap (5) is formed between the displacement body (103) and the surrounding evaporator tube (2). The displacement bodies (3) are fixed to a bottom (6) which is demountably joined to the vessel (1). The displacement bodies (3) can be removed by removing the bottom (6). The pre-evaporated product, introduced from below and leaving the evaporator tubes (2) at the top, is passed to a vapor-release vessel (11) in which a separation of vapors and concentrate takes place. Each displacement body (3) is formed by a rifled tube which has been provided by deformation with at least one spirally running recess (4). The product flows through both the gap (5) and this recess (4).Type: GrantFiled: July 21, 1980Date of Patent: April 20, 1982Assignee: Luwa AGInventors: Gerhard Proske, Rolf Van der Piepen, Hans-Joachim Bittner
-
Patent number: 4321106Abstract: A method of thermally treating flowable material by spreading the material mechanically on a wall of a treatment chamber, wherein resulting vapors are passed co-currently with the material in a first upstream section of the treatment zone, and counter-currently in an adjoining second, downstream, section of the treatment zone and removed from the treatment zone through an inlet to a discharge tube which inlet is generally in a transverse plane between the sections.Type: GrantFiled: June 30, 1980Date of Patent: March 23, 1982Assignee: Luwa AGInventors: Lorenz Burkhard, Hans Fas
-
Patent number: D288476Type: GrantFiled: September 17, 1984Date of Patent: February 24, 1987Assignee: LUWA AGInventor: Guido Ebnoether