Abstract: A pipe end cleaner device formed in a set of sizes to be mounted in the chuck of an electric drill for cleaning the ends of pipes in preparation for connections by threading or soldering. The cleaner device has a plurality of internal grooves configured and dimensioned to secure a conventional bristle brush having external grooves on its ring.

Abstract: A method of cleaning a semiconductor wafer using a cleaning brush assembly having an arbor with: (1) an expandable member configured to have a non-expanded position and an expanded position, and (2) a cleaning brush, located about the expandable member, having an inner diameter greater than an outer diameter of the expandable member in the non-expanded position and less than an outer diameter of the expandable member in the expanded position.

Abstract: A vacuum cleaner brushroll including a spindle, bristle tufts carried by the spindle, and sleeves fitted on the ends of the spindle, the bristle tufts including angled end tufts that extend through the sleeve outwardly beyond the ends of the spindle to provide a wide cleaning path and improved edge cleaning capability upon rotation of the brushroll. The sleeve on one end of the brushroll has a pulley.

Abstract: A vacuum cleaner brushroll having skirted, one piece plastic ferrules inserted into the ends of a tufted, wood spindle so that the ferrule skirts embrace the spindle end portions to prevent the ferrules from loosening upon expansion of the spindle due to moisture. The skirts are drilled to permit angled tufting to be inserted very near the spindle ends with the tufting extending axially and radially outwardly beyond the spindle ends to provide improved edge cleaning and create a wider cleaning path compared to conventional brushroll designs.

Abstract: A brush core and the method for making a brush core for use in substrate scrubbing are provided. The substrate can be any substrate that may need to undergo a scrubbing operation to complete a cleaning operation, etching operation, or other preparation. For instance, the substrate can be a semiconductor wafer, a disk, or any other type of work piece that will benefit from a brush core that can deliver uniform controlled amounts of fluid through the brush along an entire length of the brush core. The brush core is defined by a tubular core having a length that extends between a first end and a second end. The first end has an opening into a bore that is defined through a middle of the tubular core and extends along an inner length of the tubular core. A first plurality of holes are oriented along a plurality of first lines that extend in the direction of the length of the tubular core, and each of the first plurality of holes define paths to the bore of the tubular core.

Abstract: An agitator for use with cleaning machines, as well as methods for making the same, are shown and described. The agitator is configured to facilitate the removal of elongated fibers therefrom. In one embodiment, the agitator has a rotatable member with opposing first and second ends, an axis of rotation extending between the first and second ends, and an external surface extending at least partially between the first and second ends. A number of projections are attached to the external surface of the agitator. One or both of the ends of the agitator are configured to rotatably engage the cleaning machine, such as at a bearing or other connector. The external surface of the rotatable member has a first portion that is substantially cylindrical about the axis of rotation, and a second portion separate from the first portion that has at least a first depression.

Abstract: A vacuum sweeper roller brush having tuft segments arranged in straight lines is employed to slap the carpet and dislodge particulate dirt and dust lodged therein. The tuft segments are made up of groups of tufts and each tuft segment has a corresponding tuft segment spaced apart from the first tuft segment. The tuft segments are arranged in a double helix or partially in a first double helix and partially in a second double helix. Alternatively, a single helix may be used. Other embodiments employ tufts which link one tuft segment to another in a stepped pattern or employ tuft segments which link tuft segments together in a helical pattern.

Abstract: A modular roller for industrial rotary cylindrical brushes, particularly for outdoor use, of the type constituted by a central support in which a plurality of tufts of bristles are fixed, the support being constituted by a cylindrical ring whose faces are cut along two mutually parallel planes that are inclined with respect to planes that are perpendicular to the direction of the axis of the cylindrical ring, the tufts of bristles that are distributed along the ring lying on planes that are substantially radial with respect to the ring and parallel to the inclined planes of the faces.

Abstract: A hub is disclosed for supporting and retaining at least one surface conditioning article relative to and spaced apart from a rotary shaft. The hub may be a hub of a brush assembly. The hub includes an arbor tube and a pair of plates. Shoulders are provided on the arbor tube and the plates are coupled to the arbor tube at a pre-determined distance set by shoulders. The surface conditioning article is provided between the plates. Since the distance between the plates is set by the shoulders, the density of the surface conditioning article between the face plates also is predetermined. The plates may include a key-shaped region with a circular portion and a keyseat. An adapter also may be provided. The adapter is configured and dimensioned to be engaged in the key-shaped region, permitting a shaft having a smaller diameter to be coupled to the hub.

Abstract: A vehicle washing brush assembly which includes a cylindrical holder configuration having plural cloth or foam pads secured thereto and configured to be centrifugally extended radially outwardly from the holder and into surface treating engagement with a vehicle surface. A first longitudinal length of the holder has a selected number of separate cloth or foams pads oriented around the perimeter of said holder so that the ratio of the number of cloth or foam pads per 360° of the holder to the outer diameter of the holder is in the range of 8 to 12. A second longitudinal length of said holder having a selected number of separate cloth or foam pads oriented around the perimeter of the holder so that the ratio of the number cloth or foam pads per 360° of the holder to the outer diameter of the holder is less than 4.0.

Abstract: A brush mounting system for a wafer scrubbing device includes a brush mandrel and a mounting assembly on which the brush mandrel is mounted. The mounting assembly includes a mounting member adapted to be mounted to a wall of the wafer scrubbing device, and a bearing secured to the mounting member. A brush support is rotatably mounted on the bearing and has an outer end that includes a contact surface adapted to contact the brush mandrel. The contact surface has a spherical profile. The brush mandrel includes a corresponding contact surface having a spherical profile, so that the brush mandrel and the mounting assembly form a spherical joint at the point of contact.

Abstract: A sweeping machine for picking up debris from a surface includes a frame and wheels attached to said frame to support the frame of the sweeping machine over the surface being swept. A cylindrical brush is rotatably attached to said frame. The cylindrical brush includes a tubular main body and tufts attached to said tube such that the tufts extend radially outward from said tube. The tube has regions devoid of tufts bounded by regions having tufts. The sweeping machine also includes a mechanism for rotating said cylindrical brush.

Abstract: A cleaning brush for a power-driven pool cleaner having a rotatable shaft incorporates a flexible web having first and second opposing edges, the first edge having at least one first element extending in the direction of the first edge, and the second edge having at least one second element extending in the direction of the second edge. The web is deformable about the rotatable shaft to bring the first and second edges into contact, with the first element being in spaced relation to the second element such that the first element is aligned with the second element. Additionally, a positive locking structure is provided to hold the first and second elements together in a secure, locking fit.

Abstract: The present invention provides a semiconductor wafer cleaning brush assembly having an arbor with: (1) an expandable member configured to have a non-expanded position and an expanded position, and (2) a cleaning brush, locatable about the expandable member, having an inner diameter greater than an outer diameter of the expandable member in the non-expanded position and less than an outer diameter of the expandable member in the expanded position. The present invention further provides a method of replacing the cleaning brush of the assembly, and a method of cleaning a semiconductor wafer with such an assembly.

Abstract: A rotary shaft having a predetermined diameter and a cylindrical cleaning element having an axial through-hole formed therein and being capable of being either in a wet state or a dry state are prepared. The through-hole has, in a wet state, a predetermined diameter smaller than the diameter of the rotary shaft. The cylindrical cleaning element is caused to be wet and the through-hole of the wet cylindrical cleaning element is enlarged so that it has a diameter larger than the diameter of the rotary shaft. The enlarged cylindrical cleaning element is dry-set, and the rotary shaft is inserted into the through-hole of the dry-set cylindrical cleaning element. The cylindrical cleaning element into which the rotary shaft has been inserted is wet, to thereby contract the diameter of the through-hole of the cylindrical cleaning element and provide a press-fit between the cylindrical cleaning element and the rotary shaft.

Abstract: A hub is disclosed for supporting and retaining at least one surface conditioning article relative to and spaced apart from a rotary shaft. The hub may be a hub of a brush assembly. The hub includes an arbor tube and a pair of plates. Shoulders are provided on the arbor tube and the plates are coupled to the arbor tube at a pre-determined distance set by shoulders. The surface conditioning article is provided between the plates. Since the distance between the plates is set by the shoulders, the density of the surface conditioning article between the face plates also is predetermined. The plates may include a key-shaped region with a circular portion and a keyseat. An adapter also may be provided. The adapter is configured and dimensioned to be engaged in the key-shaped region, permitting a shaft having a smaller diameter to be coupled to the hub.

Abstract: A sweeping machine for picking up debris from a surface includes a frame and wheels attached to said frame to support the frame of the sweeping machine over the surface being swept. A cylindrical brush is rotatably attached to said frame. The cylindrical brush includes a tubular main body and tufts attached to said tube such that the tufts extend radially outward from said tube. The tube has regions devoid of tufts bounded by regions having tufts. The sweeping machine also includes a mechanism for rotating said cylindrical brush.

Abstract: A brush alignment apparatus and method of using the same for aligning a hollow cylindrical brush on a cylindrical roller member comprising first and second ends and an outer surface defining a internal cavity, provided with a plurality of orifices extending from the outer surface to the internal cavity, a first receptacle having a channel running therethrough in fluid communication with the first end of the roller member, a second receptacle, a spine member, a first support arm supporting the first end of the roller member and a second arm supporting the second end of the roller member.

Abstract: A brush alignment apparatus and method of using the same for aligning a hollow cylindrical brush on a cylindrical roller member comprising first and second ends and an outer surface defining a internal cavity, provided with a plurality of orifices extending from the outer surface to the internal cavity, a first receptacle having a channel running therethrough in fluid communication with the first end of the roller member, a second receptacle, a spine member, a first support arm supporting the first end of the roller member and a second arm supporting the second end of the roller member.

Abstract: A coupling particularly suited for brushes for tube cleaning operations includes interfitted shaft and brush coupling members retained by a locking mechanism in axial alignment for rotation in tube cleaning operations. The shaft and brush coupling interfit and the locking mechanism are suited for rapid mounting and replacement of the brush coupling. In a preferred form the locking mechanism comprises a sleeve and spring in nested relation to each other mounted axially of the coupling. A brush coupling adapter may form part of the coupling for receiving a standard brush element.

Abstract: A brush cutter adapted to be driven in rotary motion by a conventional machine tool. The brush cutter includes an annular wall having a cylindrical outer surface defining a longitudinal center axis. Front and rear faces are connected to opposing ends of the cylindrical outer surface. An arbor bore and a counterbore are concentrically disposed and coaxially aligned with the center axis. A plurality of brush assemblies are received within a plurality of circumferentially spaced axial and radial receiving bores. The axial receiving bores extend axially inwardly from the front face and the radial receiving bores extend radially inwardly from the cylindrical outer surface.

Abstract: A sweeping machine for picking up debris from a surface includes a frame and wheels attached to said frame to support the frame of the sweeping machine over the surface being swept. A cylindrical brush is rotatably attached to said frame. The cylindrical brush includes a tubular main body and tufts attached to said tube such that the tufts extend radially outward from said tube. The tube has regions devoid of tufts bounded by regions having tufts. The sweeping machine also includes a mechanism for rotating said cylindrical brush.

Abstract: The invention concerns a rotatable grinding/polishing tool, an apparatus with such a tool and a method for using such a tool. The tool has grinding elements in the shape of grinding/polishing flaps extending radially outward from a roller. Reinforcing support brushes also extend radially outward and adjacent to the flaps. Furthermore, the tool has holding elements, preferably in the shape of brushes, likewise extending radially outwards from the roller. The holding brushes have substantially lesser length than the flaps and the reinforcing support brushes. At the same time, the tangential stiffness of the holding brushes is considerably greater than the tangential stiffness of the flaps and the support brushes. The length of the grinding flaps is preferably so that by grinding or polishing, the flaps are capable of extending beyond an adjacent holding element.

Abstract: The invention is directed towards plastic bristles for the washing brushes of automatic car washes which operate with moving brushes, where the bristles are hollow-profile bristles. The hollow-profile bristles preferably exhibit a diameter of from 0.5 to 5 mm and a round or oval cross section.

Abstract: A method for manufacturing a sweeper or abrasive element is disclosed. The abrasive element is manufactured from a U-shaped plastic profile having an aperture in which are placed abrasive lamellae, supporting bristles and heat-dissoluble plastic threads. By heating above the plasticization temperature of the plastic, total embedding of the bristles and abrasive lamellae occurs thereby forming an integral unit. This ensures that the bristles and/or abrasive lamellae will not separate during use of rotating abrasive or polishing tools in which the abrasive elements are included. As the abrasive elements are of plastic material they are flexible and able to adapt to different diameters of abrasive or polishing tools. The user, therefore, only needs to have a supply of abrasive elements, cut into suitable lengths depending on the diameter of the tool in which the abrasive elements are to be replaced.

Abstract: The invention provides a wire brush disc shaped grinder accessory that has segments removed from the circumference of the disc to provide visibility of the work surface while in use and with the bristles of the wire brush arranged in groups around the disc. It also provides a cup shaped wire brush tool wherein the bristles are arranged in groups. In this way both provide a cooler cutting action.

Abstract: Disclosed is a rotating brush for surface treatment of working pieces. The rotating brush includes a brush fitting clamped between two clamping disks. The brush is so designed that the two clamping disks present on their opposing sides an axial shoulder of such inside and outside diameters that, when the disks are secured to each other, the axial shoulders of the one engages into that of the other to form an assembly, thereby forming a cylindrical holding element in which the brush fitting is inserted.

Abstract: A repair kit and method facilitate a quick and durarble paint repair on any color vehicle or other painted item. The kit includes a fine abrasive surface preparation tool, an applicator, and a universal touch-up paint. A second embodiment adds a small flexible rubber sanding block, a plurality of pre-cut ultrafine sanding papers, and an ultrafine polish having an abrasive selected to remove sandpaper scratches and restore the gloss to sanded paint. These elements combine to produce a smooth unbroken surface finish in a repaired area when used for paint repairs with a matching color touch-up paint. One embodiment of the fine abrasive surface preparation tool is a reusable, retractable brush to hold fiberglass bristle cartridges and provides room for a warning label and storage for a spare cartridge. A second embodiment is a low cost fiberglass brush which is disposable and has a cap cover the bristles when not in use and during shipping.

Abstract: A tubular type brush for use in a cleaning machine includes a generally cylindrical driver tube adapted to be rotated about its axis for use in cleaning an adjacent floor surface. The driver tube has an exterior surface with circumferentially and axially located bristles extending outwardly therefrom. The bristles extend, when the driver tube is in an at rest position, in a direction which is closer to parallel with the driver tube exterior surface than perpendicular to the driver tube exterior surface. The bristles have tips which move outwardly from the driver tube exterior surface as the tube rotates, with the degree of the outward movement being dependent, at least in part, upon rotary speed of the driver tube.

Abstract: A vacuum cleaner beater brush for lifting dirt from carpeted surfaces without damaging the carpet's fibers. The vacuum cleaner beater brush includes an elongate roller with a pair of opposite ends, and an outer side surface. Each of the ends of the roller has a mounting stud outwardly extending from the respective end of the roller. The outer side surface of the roller is divided into a pair of generally equal sized regions. The roller has a plurality of resiliently deflectable elongate prongs outwardly extending from a first of the regions of the outer side surface of the roller. The roller has a plurality of resilient bristles outwardly extending from a second of the regions of the outer side surface of the roller.

Abstract: Apparatus for removing residual charged toner particles from a charge retentive surface characterized by a self-biasing pyroelectric cleaner brush and a detoning member for removing the charged particles from the self-biasing pyroelectric cleaner brush. The brush includes a pyroelectric polymer supported by a conductive roll with resistive fibers attached to one surface of the pyroelectric polymer. Heating and cooling of a pyroelectric polymer induces thermal expansion or contraction which create surface charge density charges that are used to supply charge to the resistive fibers. The oppositely charged resistive fibers contact the toner particles on the charge retentive surface to thereby remove them from the charge retentive surface.

Abstract: A brushroll having a pulley driven spindle with an end assembly at each end rotatably mounting the spindle in a vacuum cleaner nozzle. On the pulley end of the spindle, a projecting pin is knurled at one end and inserted into the end of the spindle. An outboard portion of the pin is threaded. The knurling on the pin forms an abutment shoulder outboard of the end of the spindle. The drive pulley is threaded onto the threaded end of the pin until it contacts a bearing and presses it against the abutment shoulder, so as to prevent the pin from being jacked out of the spindle when the pulley is threaded onto the pin.

Abstract: A rotary bristle tool having a backing with a plurality of bristles extending therefrom. The bristles have a cross section and preferential orientation to control deflection during rotation of the tool. One embodiment is well suited for refining the inside surface of two-way and three-way corners. The backing and bristles are preferably integrally molded. The rotary bristle tool is molded from a moldable polymer such a thermoset polymer, thermoplastic polymer, or thermoplastic elastomer. The rotary bristle tool can include an attachment member molded integrally with the backing. Also disclosed is a method of making a rotary bristle tool and a method of refining a workpiece surface with a rotary bristle tool.

Abstract: A cleaning device for cylinders of printing presses, having at least one wash roll engageable with and disengageable from the cylinders, the wash roll being formed as a brush roll and being sprayable with cleaning fluid, includes straight bristles and wavy bristles arrayed on the brush roll.

Abstract: A method and apparatus for cleaning the edges of substrates. The present invention provides a cleaning mechanism that cleans particles off the edge of the wafer based on friction at a point of contact between the wafer and a wafer edge brush. In one embodiment, the cleaning mechanism includes a side brush that cleans the top-side or bottom-side of a wafer. The side brush is rotated by a motor that is attached to a first end of the side brush. An edge brush is attached to a second end of the side brush and is rotated along with the side brush to clean the edge of the wafer.

Abstract: A bristle strip includes a channel, a mat, staples and nails. The mat is made of a plurality of bristles. The staples penetrate the channel and the mat and one staple is placed within one-half inch of each end of the channel to retain the bristles therein. The nails are inserted in each end of the channel to further ensure retention of the bristles.

Abstract: An abrading tool or brush is formed with an open center low density tuft. The tufts are laterally slightly compressed and encapsulated in a medium density elastomeric foam reinforcement having a density of from about 20 to about 50 lbs/cu/ft (320-800.90 Kg/cu. meter). When the tufts are formed, preferably of wire, they are twisted about a core extending axially of the tufts. The core includes angled facets which form corners around which the wire is bent to form closely spaced bends to promote short fracture of the wire in use.

Abstract: The mechanical roughening of the surface of a printing plate substrate comprising aluminum or an aluminum alloy is carried out by wet brushing with the use of a cylinder brush 1 in which brush rows 2, 3 having bundles of organic fibers 22 and metal wires 33 are arranged side by side on the surface 7. The suspension used for the wet brushing contains from 5 to 80% by weight of abrasive particles in water.

Abstract: A refuse collection device (1) including a collector roller (11) and an inclined conveyor (27) which deposits collected debris into a hopper (127) along arcuate paths (128, 129), thereby filling the hopper (127) initially in the region adjacent to its rear wall (130). Mounted on the collector roller (11) is a plurality of rubber fingers (13, 14, 15, 16) arranged in rows (17, 18, 19) which are laterally offset from substantially identical rubber fingers (39, 40, 41), also arranged in rows (32, 33, 34) so as to occasionally form a substantially continuous, upwardly moving entrainment platform (150) and to also occasionally form an arrangement of spaced apart fingers which each transport debris onto the conveyor (27). The collector roller (11) is attached to a hydraulic ram (118) so as to permit the collector roller (11) to travel over excessively large debris without interference.

Abstract: Brush bristle assemblies are formed into strips with strips of length of thermoplastic monofilaments which are mutually fused at their bottoms and formed into coupling bars with snaps fastening heads. The bars are slidably coupled to linear or helical channels or slots formed in rotary driven brush drum bristle substrates. In one form, the individual monofilament lengths are bent to form dart shaped loops. The bent thermoplastic lengths are longitudinally stacked with the apices of the contiguous loops being mutually fused to form a bristle strip. A hand brush is formed of a bunch of polypropylene filaments, the bottom section of which being mutually fused and shaped to form a bristle base and handle.

Abstract: A cleaning and polishing assembly having a compressible main body with a releasable attachment material on one face and a fibrous working surface on its other face. The fibrous working surface is composed of fibers having a trilobal cross-section. The cleaning and polishing pad can be mounted on a power drive tool, or in a hand-actuated embodiment, can be mounted to a gripping pad specially adapted for hand use.

Abstract: An intracoronal bristle brush for preparing a tooth cavum comprising a plurality of bristles and a dental bit having a first end being a shank adapted to be received by a dentist's handpiece and a second end for receiving the plurality of bristles. The plurality of bristles emanate outwardly in a uniform manner from an axial hole within the second end. The diameter of the intracoronal bristle brush is substantially uniform along its entire length such that the bristles of the brush may penetrate into an interior surface of a tooth cavum.

Abstract: A repair kit and method facilitate a quick and durable paint repair on any color vehicle or other painted item. The kit includes a fine abrasive surface preparation tool, an applicator, and a universal touch-up paint. A second embodiment adds a small flexible rubber sanding block, a plurality of pre-cut ultrafine sanding papers, and an ultrafine polish having an abrasive selected to remove sandpaper scratches and restore the gloss to sanded paint. These elements combine to produce a smooth unbroken surface finish in a repaired area when used for paint repairs with a matching color touch-up paint. One embodiment of the fine abrasive surface preparation tool is a reusable, retractable brush to hold fiberglass bristle cartridges and provides room for a warning label and storage for a spare cartridge. A second embodiment is a low cost fiberglass brush which is disposable and has a cap to cover the bristles when not in use and during shipping.

Abstract: A concentric roller pin for use in combination with a roller member of a vacuum cleaner wherein the concentric roller pin includes an inner end, an outer end and an intermediate portion. The inner end of the concentric roller pin is tapered and terminates in a transverse face. The transverse face of the concentric roller pin abuts a corresponding face in a tapered bore of the roller member. The intermediate portion of the concentric roller pin includes an outer knurled surface for securing the concentric roller pin to the roller member. The outer end of the concentric roller pin includes a bearing surface, a bearing lip, and an axial bore. The axial bore of the outer end of the concentric roller pin facilitates deformation thereof for securing a bearing against the bearing lip and the bearing surface.

Abstract: A drive hub spindle assembly for use in connection with a cylindrical broom (12) is provided which enhances power transmission and facilitates drive hub/spindle engagement. The drive hub (10) includes three radially projecting lugs (24) for engaging mating recesses (72) of the spindle (60). A novel reinforcing structure (52) associated with each of the lugs (24) is also disclosed. The hub (10) is self-centering and requires minimal manipulation during engagement.

Abstract: An apparatus and method for making a composite roofing material includes a reel support for reels of each of a vulcanized rubber sheet, a polymeric film and a fleece matting and pinch rollers which advance the rubber sheet from its reel through a path including a cleaning and scrubbing vat, a stretcher, and a heater. In the cleaning and scrubbing vat, counter-rotating brush cylinders with special abrasive bristles effectively remove the non-stick talc coating from the vulcanized rubber. Once the rubber sheet is heated, polymer film and fleece matting from separate rollers are sandwiched with the rubber sheet and passed through a pair of compression pinch rollers where the polymeric film is melted.

Abstract: A concentric roller pin for use in combination with a roller member of a vacuum cleaner wherein the concentric roller pin includes an inner end, an outer end and an intermediate portion. The inner end of the concentric roller pin is tapered and terminates in a transverse face. The transverse face of the concentric roller pin abuts a corresponding face in a tapered bore of the roller member. The intermediate portion of the concentric roller pin includes an outer knurled surface for securing the concentric roller pin to the roller member. The outer end of the concentric roller pin includes a bearing surface, a bearing lip, an axial indentation, and a beveled edge surrounding the axial indentation. The axial indentation and beveled edge of the outer end of the concentric roller pin facilitates deformation thereof for securing a bearing against the bearing lip and the bearing surface.

Abstract: An apparatus for making a composite roofing material includes a reel support for reels of each of a vulcanized rubber sheet, a polymeric film and a fleece matting and pinch rollers which advance the rubber sheet from its reel through a path including an abrading roller, a cleaning and scrubbing vat, a stretcher, a heater and then, along with the polymer film and the matting, through a pair of compression pinch rollers. The cleaning and scrubbing vat effectively removes the non-stick talc coating from the vulcanized rubber. The thus cleaned rubber sheet is heated by the heater to a temperature which is sufficient to melt the polymeric film as it comes into contact with the vulcanized rubber sheet. The melted film acts as an adhesive to cause the fleece matting to adhere to the vulcanized rubber sheet as the rubber sheet, the polymeric film and the fleece matting are compressed together by the compression pinch rollers.

Abstract: A rotary brush is especially useful in vacuum cleaning of duct interiors. The brush has a hub with a center hole for receiving a drive shaft of a power tool, an annular collar positioned over the hub, and a low density strand set of polymeric flexible strands extending from the annular collar. The collar has a set of substantially uniformly spaced radial holes to receive the strands. The strand set of polymeric flexible strands is capable of being bent axially of the annular collar so as to access the duct's interior through a small opening. The strand set is also capable of bending radially during a cleaning process. The low density of strands ensures that efficient vacuuming of debris loosened by the rotary brush is accomplished.

Abstract: A roller brush and method of making same for sweeping machines for cleaning streets and roads. The brush includes cassettes arranged in brackets around the periphery of a roller and extending in the longitudinal direction of the roller. The cassettes receive spring members, such as radially projecting bristles, the ends of which are brought in contact with ground when the brush is used for cleaning. The cassettes are received in grooves in the brackets. The spring members are bent double around a locking wire which acts to hold the members in the cassettes and which passes through holes in connecting cross walls extending from facing long sides of the cassettes. The connecting cross walls are provided at spaced locations along the cassette thereby defining cells on the cassette. The spaced connecting cross walls act to increase the rigidity of the cassette.