Abstract: Process for calibration of spectroscopic instrumentation for non-invasive monitoring of resin-loading of furnish-type wood materials, such as particles or fibers for particleboard or medium density fiberboard, respectively. Selection of ranges of wavelengths within a 350 nm to 2500 nm region by providing selection of spectrometers and sensors for wavelength ranges of 350-1000 nm, 1000 to 1800 nm, 1000 to 2500 nm, and 400 to 2200 nm, for use by engineered-wood manufacturing installations. Resin-loaded wood material is exposed to selected VIS/NIR energy and monitored as it moves on-line in relation to calibrated spectroscopic instrumentation; a sensor collects non-absorbed radiation energy reflected by the wood materials. Measurements are processed, in relation to pre-established calibration data, to determine whether the resin-loading is within manufacturing objectives; monitoring and feedback are used to maintain desired specifications.

Abstract: A method of extruding a mixture made of a granulate, chips, or powder, etc. of a first thermoplastic and a second thermoplastic is described, the melting range of the first thermoplastic differing from the melting range of the second thermoplastic, using an extruder which has a heatable housing and a screw, which has an intake zone, a melting zone, a delivery zone, and a hole, extending from the intake zone up to the delivery zone, into which a temperature control media may be introduced, in which the temperature control medium causes heating of the screw in the intake zone to a temperature below the melting range of the thermoplastic having the lower melting range and temperature control of the screw in the delivery zone to a temperature which lies between the melting range of the first thermoplastic and the second thermoplastic.

Abstract: The present invention provides a method of fabricating a polishing pad having a detection window thereon. A mold having a cavity therein and a transparent thermosetting plastic part that is incompletely hardened are provided. The transparent thermosetting plastic part is disposed in the mold and a high molecular weight foam is injected into the cavity of the mold. The transparent thermosetting plastic part and the high molecular weight foam are hardened at the same time. After the step of demolding is performed, a polishing pad having a detection window thereon is formed. Moreover, the transparent thermosetting plastic part can be designed to have the central portion thicker than its peripheral portion for preventing deformation that is caused by the material difference of the detection window and other portions of the polishing pad.

Abstract: Process for the manufacture of an article comprising a rigid support element of which a “show” face is partially covered by a supple covering. The covering is connected to a relatively rigid holding element having its own shape and a strength such that it is not substantially deformed under predetermined foaming conditions, in order substantially to maintain the covering in a predetermined shape. Then, the covering and the support element are placed in a foaming mould, and, since the support element has a hollow region delimited by a peripheral rim, a docking surface of the covering is disposed opposite the peripheral rim. Foam is thus introduced into the mould, between the support element and the covering, under the predetermined conditions, in order to connect the covering and the support element.

Abstract: A method for manufacturing a molded product with an improved quality. A metal core is set at a predetermined position in a mold. Then, the mold is closed, a first liquid containing a releasing agent and a solvent is injected into the cavity, and the cavity is depressurized. This forms a uniform releasing agent layer on the wall surface of the cavity. Then, a mold-coat layer, which provides a surface layer of the molded product, is formed on the releasing agent layer, a molding material for forming a molding layer is injected in the cavity, and the mold is opened.

Abstract: The present invention relates to an apparatus for manufacturing foamed thermoplastic resin pellets and method thereof. The manufacturing apparatus includes a cylindrical dice, a plurality of extrusion holes formed along a radial direction of the dice and communicated with a resin flow path formed at the dice, a guide symmetric with the extrusion holes and protrudingly formed at the whole or a portion of outer circumference surface along the longitudinal direction of the dice, an operation member slidably installed along the guide, and a cutting knife with penetration holes being formed along the longitudinal direction of the knife and being communicated with the extrusion holes, wherein both ends of the knife are fixed at the upper edge of the facing planes of the operation member, and its center in the traverse direction is downwardly curved such that it is contacted with the contact line of the extrusion holes. A foaming-rate regulating member is installed at the outer circumference surface of the dice.

Abstract: Polyisocyanurate systems, pultrusion of those systems to produce reinforced polyisocyanurate matrix composites, and to composites produced thereby. The polyisocyanurate systems include a polyol component, an optional chain extender, and an isocyanate. The polyisocyanurate systems have extended initiation times of about 5 minutes to about 30 minutes at room temperature, and can be snap cured.

Abstract: Several methods and machines for continuously forming a fastener product having an array of fastener elements extending from a continuous, sheet-form base, employing a mold belt on which the sheet-form base of the product is formed and from which it is subsequently stripped. The belt defines an array of cavities extending from its outer surface, for molding either the array of fastener elements or an array of preform stems that are subsequently reformed into the fastener elements. In some cases the cavities are blind, such as for forming hook-type fastener elements; in other cases, the cavities extend through the belt, such as for forming mushroom-type fastener elements. Various belt constructions and fastener element shapes are also disclosed.

Abstract: A method for forming boards of foamable materials, includes preparing two plastic materials and disposing or extruding and mating a foamable material between the plastic materials, to form a board having two outer layers formed by the plastic materials, and an intermediate layer formed by the foamable material. An air or a foamable agent may be injected or combined into the foamable material before conducting the extruding process, in order to foam or expand the foamable material, and to decrease the density and the weight of the foamable material and the boards. The air may be selectable from carbon dioxide, propane, or butane, or other air.

Abstract: A multi-shaft extruder is disclosed with at least two shafts for compounding and/or molding an elastomer staggered with filler, in particular rubber, with at least one softener and/or additives.

Abstract: Described is a composite material and therefrom produced cured, preferably shaped, articles having a thermal conductivity and specific gravity on demand by selecting an appropriate inorganic aggregate and a cementiteous binder composition, said binder composition comprising a binder and ultrafine particles. With the addition of a polymer based superplasticizer self compacting properties at any desired specific gravity can be achieved. No mechanical compaction or vibration is needed for the production of shaped articles. The mixture can be polymer- and/or fiber reinforced. Workability time and hardening can be adapted to job site needs by addition of set retarders and/or accelerators and/or by heating.

Abstract: A custom shoe sole manufacturing system for efficiently creating a custom shoe sole. The custom shoe sole manufacturing system includes the steps of forming a negative impression of a foot within a foam member, vacuum forming a seal about the negative impression, positioning a casting frame about the negative impression, filling the casting frame with a casting material, removing the casting frame after casting material is hardened, positioning a liner upon the positive impression, securing a cover member about the casting frame, inputting a polymer into the cover member and casting frame, and removing custom shoe sole from casting frame after polymer has hardened.

Abstract: A method of forming a polyurethane article wherein first and second components of a polyurethane system are sprayed into an unconfined space above a mold. The first and second components are sprayed together to mix initially in the space above the mold and then are deposited in the mold on an in-mold coating that was previously applied to the mold. The two components of the polyurethane system and in-mold coating are subsequently removed from the mold as a flexible polyurethane skin. The skin may then be placed in a second mold along with a reinforcement. Structural polyurethane foam may then be injected to the second mold where it bonds to the reinforcement and the skin to form a finished polyurethane article having a flexible skin adhered to its surface. A post-mix spray nozzle assembly is provided with a central nozzle forming a first hollow conical spray pattern and a coaxially aligned annular nozzle forming a second hollow conical spray pattern.

Abstract: Method for manufacturing injection molding pieces consisting of at least two components whereby a first injection molding piece is formed of a first component in a first mold impression and a second injection molding piece is formed by putting the first injection molding piece in a second mold impression, and by providing a second component on it, characterized in that a mold with at least three series of mold parts is used, whereby the first series and the second series thereof alternately work in conjunction with the third series, and whereby a mutual repositioning of every first injection molding piece takes place in between.

Abstract: A process for manufacturing a dressing for an inner lining comprising molding an intermediate layer of a semi-rigid fibrous blanket, applying onto each surface of the layer a thermosetting resin and then a reinforcement layer made of fibrous material; applying at least one protective sheet on one side, covering one of the reinforcement layers defining a concealed surface; and applying onto the opposite side of the lining the decorative lining layer defining an exposed surface; and finally subjecting the layer thus obtained to a shaping or molding process in a hot press, and also polymerizing the thermosetting resin. The invention also relates to the product obtained by the process.

Abstract: An equipment and method of manufacturing an amplifier utilizes different injection molding machines to respectively manufacture an external case of an amplifier by using unlimited kinds of material to increase the connection between a diaphragm and a suspension, reduce the cost and enhance the speed of manufacture and the utilization rate of producibility tremendously.

Abstract: A device (1) for cooling and/or thermal conditioning of hot preforms or parisons (6), in particular of parisons for the production of blow-moulded bottles made of plastic material, limits and/or reduces the deformations of said parisons during cooling by containing the transverse deformations of the end close to the opening (8) of the parison. The device is provided with a tubular portion of prolongation which wraps totally around the parison that rests on its internal surface with one of its sections (9). Described herein is the corresponding method for cooling the parison (6).

Abstract: In stereolithographic apparatus and method, a mask is formed on a light-transmissible member (glass plate) on the basis of stereolithographic data for one layer of photohardenable resin; photohardenable resin of one layer is successively supplied to form an unhardened resin layer of photohardenable resin; if necessary, a film having light transmission is attached onto the unhardened resin layer so as to cover the unhardened resin layer in close contact with the unhardened resin layer; the light-transmissible member having the mask on or above the film; the unhardened resin layer is plane-exposed to light through the mask to harden the photohardenable resin of the unhardened resin layer; and the light-transmissible member and the film are evacuated from the hardened photohardenable resin layer after the exposure by the exposure means, thereby obtaining a desired three-dimensional object through stereolithography. As the photohardenable resin may be used having a melting temperature ranging from 5 to 90° C.

Abstract: The invention relates to a ceramic joint body and a method of producing the same and a ceramic structural body for a semiconductor wafer, and is particularly used in a semiconductor producing apparatus or an inspection apparatus such as a hot plate (ceramic heater), an electrostatic chuck, a wafer prober or the like, and basically relates to a joint body obtained by joining two or more same or different ceramic bodies, characterized in that ceramic particles grown are existent in joint interfaces of the ceramic bodies so as to infiltrate into the ceramic bodies located at both sides around the interface and the layer of a concentrated sintering aid is eliminated from the joint interface.

Abstract: The invention relates to a method and an installation for processing thermoplastic synthetic materials. According to the invention, the melt strands or the like are displaced in oscillation or pulsation in order to indent or penetrate the joint lines between at least two injection strands.

Abstract: An electrospinning device for generating a coat from a liquefied polymer, the device comprising: (a) a dispenser for dispensing the liquefied polymer; (b) a cavity having a longitudinal axis, comprising a first system of electrodes; the dispenser and the first system of electrodes being constructed and design such that the liquefied polymer is dispensed from the dispenser and forms a plurality of polymer fibers moving along the longitudinal axis; and (c) a mechanism for relocating the polymer fibers out of the cavity, in a direction of an object, so as to generate a coat on the object.

Abstract: A method for making a composite construction panel includes at least the steps of (a) providing a mold, (b) applying a UV-curable gel coat to the mold, (c) directing UV radiation to the gel coat to cure the gel coat, (d) applying a first vail mat layer to the gel coat, (e) applying a first UV-curable wet out resin coat to the first vail mat layer, (f) directing UV radiation to the first wet out resin coat to cure the first wet out resin coat, (g) disposing a core material onto the first vail mat layer, (h) applying a second UV-curable wet out resin coat to the core material layer, (i) directing UV radiation to the second wet out resin coat to cure the second wet out resin coat and to thereby yield a composite construction panel, and (j) removing the composite construction panel from the mold.

Abstract: A method for making a composite construction panel includes at least the steps of (a) providing a mold, (b) applying a UV-curable gel coat to the mold, (c) directing UV radiation to the gel coat to cure the gel coat, (d) applying a first vail mat layer to the gel coat, (e) applying a first UV-curable wet out resin coat to the first vail mat layer, (f) directing UV radiation to the first wet out resin coat to cure the first wet out resin coat, (g) disposing a core material onto the first vail mat layer, (h) sealing the core material to provide a stand alone composite, and (i) removing the stand alone composite from the mold.

Abstract: A process for preparing a blow molding preform comprises melting plastic flakes in a plasticizing screw extruder to prepare a homogeneous stream of hot polymer melt at the discharge of the extruder, cooling the polymer melt stream to a temperature at least 20 degrees Centigrade below the extruder discharge temperature by heat exchange with a liquid heat transfer medium, and forming the cooled polymer melt into a blow molding preform.

Abstract: An inflation film is formed by extruding a raw resin in a molten state through a circular die to form a tubular film, expanding the tubular film by the pressure of a gaseous medium introduced into an inner space of the tubular film, while the tubular film is being cooled to be solidified by blowing a cooling gas to the outer surface of the tubular film, and drawing the film while being progressively flattened by guide members. During the manufacture, the temperature Tf (° C.) of the solidified tubular film at the time it contacts the guide member for the first time is so adjusted as not to be higher than Tr (5) [° C.]; wherein Tr (5) represents the temperature at which the thermal deformation ratio of the solidified tubular film becomes 5% when it is measured, being loaded with a stress of a value equal to the frictional force received from the guide members under the conditions of manufacture of the film.

Abstract: A modular metalmaking lance having a pre-fabricated “plug-in” lower sections. The plug-in section is preferably of sufficient length to ensure that the joint between a plug-in section and an upper lance section is not in the area of the lance that typically is damaged in refining service. At the same time, the plug-in section is preferably short enough to be transported from an off-site assembly/repair shop to the refining shop via standard-length cargo trucks or truck-trailer rigs used throughout the world.

Abstract: The invention relates to a spring suspension system comprising a helical spring, a sheath, and at least one centering and bearing cup, said spring having an end turn with at least a fraction thereof being covered by said sheath, and which is centered on and bears against said centering and bearing cup. The sheath presents an opening extending around the inner periphery of the sheath and facing towards the spring axis. The fraction of the end turn covered by the sheath is centered on and bears against the centering and bearing cup via spacer means between said sheath and said centering and bearing cup.

Abstract: A PU foam shock absorber in accordance with the present invention is composed of a tube (10), a resilient core (11) mounted inside the tube (10) and a cap. The resilient core (11) is made of PU foam to absorb and to buffer shock. Additionally, the resilient core (11) may be selectively divided into multiple sections of different density and hardness to adjust the damping coefficient of the shock absorber.

Abstract: A shock-absorbing structure includes an elastic helical body, and an elastic helical curved tube. The elastic helical body is formed with a plurality of loops and a plurality of buffer spaces each defined between any two adjacent loops. The elastic helical curved tube is formed with a plurality of curved convex portions each inserted into a respective buffer space and urged between any two adjacent loops. Thus, the buffer spaces of the elastic helical body provide a cushioning effect. In addition, the elastic helical body and the elastic helical curved tube produce an elastic restoring force, so as to damp and reduce the stress applied on the shoe sole, thereby providing a shock-absorbing effect.

Abstract: Suspension system comprising a flat spring member having four legs. The legs are symmetrically arranged with respect to the center position of the spring member and each of the legs has a longitudinal axis and an end portion. A suspension frame is provided to support the spring member (by fixing the end portion of two legs. Two preload elements are arranged close to the end portions of two of the legs in a manner to apply a preloading force at those legs. The preloading force essentially points in the direction of the longitudinal axis.

Abstract: A wire-stitching apparatus for producing wire-stitched print items includes a conveying arrangement for supplying folded, printed products in a straddling position; a wire-stitching unit installed at an adjustable distance above the conveying arrangement and including a bending device; at least one wire-stitching aggregate; and a stitching carriage for moving the at least one wire-stitching aggregate back and forth along a path. The wire-stitching aggregate includes a bender for forming legs of a staple and a driver for pushing the staple legs through the printed products. At least one wire feed feeds wire to the one wire-stitching aggregate at a stitching wire length. At least one adjustable wire-cutting device for adapts a wire staple to the thickness of the printed products. A control unit measures the thickness of the printed products positioned on the conveying arrangement upstream of the wire-stitching unit, and/or processes stored data related to the printed products.

Abstract: Method and apparatus for assembling sheets of printing media for booklets. In one aspect the sheets are folded, sheet-by-sheet, and in another aspect the sheets are collected, sheet-by-sheet, and registered on a fold in each sheet. In still another aspect printed sheets are loaded, sheet-by-sheet, into the apparatus. Each sheet is trimmed to a pre-determined width depending on the position of the sheet in the booklet being assembled. The sheets are thereafter folded, sheet-by-sheet, and collected into a stack. The method and apparatus have particular application in finishing duplex printed sheets of paper into saddle-stitched booklets.

Abstract: A system and method for merge-sequencing ordered subsets of items into a single merged set in a predetermined sorted sequence and error-checking the resulting merged set to provide information about out of order items to allow for efficient error correction methods. The system uses an outcome verifier module to ensure that items placed onto the single merged set are in the proper sequence. Items that are not in the proper sequence are temporarily removed from the merged set. If it is determined that items are missing from the sorted sequence a placeholder may be inserted to mark the place of missing items.

Abstract: Disclosed herein is a media handling device for handling sheets of media contained in a conglomerate stack.

Abstract: A sheet feeding apparatus includes a sheet feeding device that picks up sheets from stacked sheets and feeds the sheets one by one, a drive device that drives the sheet feeding device, first and second detecting devices that detect the fed sheet, and a control device that feeds the sheet while setting a drive amount of the drive device. The control device calculates a first drive amount of the drive device during a first interval from when the first detecting device detects the sheet to when the second detecting device detects the sheet based on information detected by the first and second detecting devices, and the control device sets a second drive amount of the drive device during a second interval from when the second detecting device detects the sheet to when the drive device is stopped based on the calculated first drive amount.

Abstract: An apparatus for feeding porous sheets of media from a stack of such sheets includes a retaining structure that is configured to retain the stack in an aligned condition. A pick-up device is operatively arranged with respect to the retaining structure. The pick-up device includes a gas conduit that is in fluid communication with a gas supply and a nozzle arrangement that is in fluid communication with the gas conduit. The nozzle arrangement is shaped to define a pick-up surface. The pick-up device is displaceable along a feed path relative to the retaining structure. The pick-up device is positioned so that the nozzle arrangement is capable of directing a flow of gas onto a first sheet of the stack such that the gas passes partially through the first sheet and impinges on a second sheet, generating a cushion of air between the first and second sheets to separate the first and second sheets.

Abstract: An automated banking machine (10) includes sheet dispensing mechanisms (34, 36, 38, 40). Each sheet dispensing mechanism includes a picking member (72). The picking member rotates, with each rotation generally causing one sheet to be picked from a stack (42) of sheets. The picking member includes movable engaging portions supported on arcuate segments (128, 144). The engaging portions move radially outward to apply additional moving force to an end note bound in the stack responsive to movement of the picking member exceeding the movement of the end note. Sheets are carried in the machine by a transport (54) including a plurality of belt flights (174, 176, 178). Sheets are carried between the belt flights and projecting member portions (180, 182). At least one of the belt flights includes a plurality of longitudinally spaced projections (194, 200, 204, 207) on a sheet engaging surface thereof.

Abstract: A sheet stacking device for stacking sheets of generally rigid material, comprised of at least one gripper device operable to releasably grip an edge of a sheet material and gripper drive means operable to move the gripper device from a first location to a second location. A support device supports the sheet as the sheet moves from the first location to the second location. The support device has a supporting position, wherein the support device supports the sheet and a non-supporting position wherein support for the sheet is removed. A stacking platform is provided below the second location. Control means control the gripper device, the gripper drive means and the support device.

Abstract: A method for aligning print media on a feedpath includes the steps of: aligning a sheet of print media using a deskew mechanism; measuring the skew of the sheet after it has been aligned; and comparing the measured skew with a specified skew, and if the measured value is greater than the specified value, reversing the sheet through the deskew mechanism followed by repeating the aligning, measuring and comparing steps. An apparatus for implementing alignment of print media on a feedpath comprises a deskew mechanism and sensors positioned downstream on the feedpath from the deskew mechanism to provide data sufficient to calculate the skew of the sheet.

Abstract: The skew of a sheet of print media is precisely controlled by intentionally inducing print media deformation, so that cooperative mechanical and gravitational forces may be used to align the leading edge of the sheet. The sheet is driven into a nip region of deskew rollers in a manner that causes the print media to deform, lifting a movable member in a direction substantially perpendicular to the feedpath into the nip region. The movable member applies a return force that is generally equal along a widthwise surface region of the print media. As a result, there is a reduced likelihood that the print media will be skewed relative to the nip region. In some applications, the return force is adjustable.

Abstract: A method for initiating interaction between clients and psychological therapists, social workers or family mediators, as well as initiating interaction in other social settings, such as in parlor games or the like, where members may otherwise be inhibited from interaction with a central character or with other members. The method utilizes one or more game pieces having patches distributed about surface(s) of the game piece(s). The patches correspond to general topics for discussion or issue-related topics, depending on the make up and purpose of the group of participants. The game pieces are then tossed to a participant, rolled across a floor or table, or thrown at a wall or receiving board whereby one patch per game piece is displayed and the identified participant is required to discuss or react to the topic corresponding to the displayed patch(es).

Abstract: This invention relates to the game board that can be adjusted up to 6 levels or positions for suitable with each type of game. This level adjustment effected by turning the control button to the left or right and the game board is elevated to a different position as desired. The movement of the game board in each level is set by the control lever placed on the control holed sheet. The axis is controlled through the control hole and placed on the plastic cogwheel teeth according to the up and down positions of each game level.

Abstract: A portable multi-player card game having a unique set of playing cards and a unique system for scoring and keeping track of score, wherein the method of playing is distinct from cribbage based card games. A game board is provided, having a card holder portion and a score board portion; wherein, the score board portion includes a games won section and a points scored section. Both of these sections include three scoring rows. Within each scoring row are one or more rows of peg holes within which the scorekeeper keeps track of the number of points accumulated by each player, or team of players. Scoring occurs as players' cards are matched to cards of identical color, or to cards depicting other images or numbers, in a central pile. The object is to score eleven points and win an individual game. Whoever wins three games first wins the entire game.

Abstract: A create a song game capable of being played by any plurality of participants. The game includes at least one deck of cards, and preferably a plurality of four decks each which corresponding to words referencing a given subject matter category. A pair of time measuring devices, such as sand-filled hourglasses, identify both an initial start time and a subsequent stop time during which a player must improvise and subsequently sing a song based upon the selected and category specific word. Each player in succession selects a card, improvises a song based upon the word illustrated on the card, and commences the singing of the song within the predetermined start time and until elapsing of the subsequent stop time. A winner of the game is determined by popular vote of the participants and after any equal number of game playing turns have been accomplished.

Abstract: A western heritage ranch sports event includes elements which test horsemanship and other skills of the participants. The present event requires that one or more preselected herd animals (e.g., cows or calves) be cut or culled from a herd located at one end of an arena, and then driven or herded by the contestant(s) for the length of the arena, perhaps along a predetermined route, to a goal gate or enclosure. The object is to achieve this in the lowest total elapsed time. When more than a single competitor is participating, the competitors act as a team. More than one herd animal may be used as desired, with time credit given for successfully cutting and herding more than one animal. While roping the animals is not required, successful roping of the animals provides an additional time credit for the contestants, with unsuccessful roping attempts resulting in a time penalty.

Abstract: A seal includes a bore seal portion comprising a first leg terminating in a first sealing profile and a second leg terminating in a second sealing profile, a crush seal portion, and a web extending between the crush seal portion and the bore seal portion. A method of installing a seal includes pressing a bore seal portion of the seal into a first bore of a first member such that a first sealing profile is urged against an inner surface of the first bore, pressing the bore seal portion of the seal into a second bore of a second member such that a second sealing profile is urged against an inner surface of the second bore and the first bore is generally aligned with the second bore, and crushing a crush seal portion of the seal within grooves defined by the first member and the second member.

Abstract: Unitary radial lip seals are useful to provide permanent lubrication to rotary shaft and bearing assemblies. In addition, these seals also function as excluder seals to keep dirt, chemicals, and other contaminants from contacting the lubricated surfaces. However, previous radial lip seals have a tendency to wear or cut a groove into the associated rotary shaft, as the shaft is rotated during normal operation of the machine. The present disclosure describes a radial lip seal having a sleeve, a seal case, a faceplate and flexible member. This improved seal also has a second sleeve operably positioned between the shaft and the faceplate wiper ring that alleviates the tendency of the wiper ring to cut a groove into the shaft during normal operation of the machine.

Abstract: A brush seal is provided between static components of a turbine. The turbine flowpath has an inlet spaced from another the inner web of the first stage nozzle. A brush seal is disposed between the two static components to minimize leakage flow to the packing casing region. The bristles of the brush seal are preloaded to fill any gap between the static components caused by distortion or out-of-roundness of the opposed surfaces being sealed. A side plate may contact the opposed sealing surface, increasing the pressure capability of the brush seal and minimizing overall seal leakage by providing the minimum possible flow area restricted solely by the bristles.

Abstract: The invention relates to the sealing-off of the rotor (3) of hydraulic turbomachines with respect to the turbine casing (2) by means of a seal.

Abstract: The invention relates to a slot piston ring (1) for the pistons of internal combustion engines or compressors, having a peripheral recess (9) (a so-called scraper ring) that extends close to the slot (2) on the external periphery (3) of the piston facing away from the combustion chamber. The aim of the invention is to reduce oil consumption and the amount of leakage gas of such a piston. To this end, the recess is configured to extend from a zone (10) diametrically opposite the slot, starting with a maximum height (12) which gradually decreases to zero (13) in the direction of the slot or close to the slot.