Abstract: A photo-mask to be used in a light exposure step for manufacturing semiconductor devices is cleaned by wetting front and rear surfaces of the mask with a liquid, brushing the wetted surfaces with a pair of rotary brushes, wetting the brushed surfaces with an electrolytic solution containing sufficient electrolyte to substantially eliminate electrostatic charge from the surfaces, spraying and immersing the photo-mask in an organic liquid such as an alcohol, and then drying the photo-mask.

Abstract: Effective cleaning of an article can be achieved by a method comprising scrubbing the surface of the article by means of a cleaning roll having a surface layer of polyvinyl acetal porous elastic material having a porosity of 85% to 95%, an average pore opening of 10 to 200 .mu.m, and a 30% compression stress in the state characterized by a water content of 100% based, on the dry weight of the material, of 15 to 150 g/cm.sup.2.

Abstract: A method and apparatus of cleaning with a roll brush a three-dimensional surface of a curved glass sheet. Levels at both ends of a rotating shaft of the roll brush are independently controlled and an inclination angle of a support frame of the roll brush about the rotating shaft of said roll brush is controlled when the roll brush is moved along the three-dimensional surface. The posture of the roll brush is controlled in such a manner that the rotating shaft of the roll brush becomes substantially parallel to the three-dimensional surface and that a roll brush extended opening of the support frame surrounding said roll brush is directed in a direction substantially normal to the three-dimensional surface. The posture control of the roll brush is carried out in accordance with prestored data sampled along the curved surface of the glass sheet.

Abstract: An apparatus and method for cleaning a digitally encoded disc by moving a circumferential wiping surface in a circular path across the periphery of the disc toward the middle of the disc, and again outwardly toward the periphery of the disc. This is accomplished by having a gear drive connection between a rotatable disc support member and a rotatable wiping member positioned above and offset to one side of the support member. Rotation of the cleaning member causes a relatively slower rotation of the support member so that all parts of the disc are properly cleaned.

Abstract: An overhead frame supports a gear housing which supports a strip support frame from which flexible cleaning strips are hung. A motor driving a main shaft to which the housing is connected moves the strip support frame in a circular path about a first axis over the top of a vehicle while the strips contact the body of the vehicle for the scrubbing action. As the strip support frame is moved in the circular path, it is positively moved about a second axis parallel to the first and in a direction opposite the direction of movement in the path. The strip frame is rotatably mounted on an inclined portion of a second shaft whose main portion is on the second axis, so the strip support frame is rotatable on a third axis which is inclined with respect to the first and second axes. Rotation of the shaft having the inclined portion is provided by a gear coupling to a stationary gear in the rotating housing.

Abstract: An article and a method for cleaning a contact lens is disclosed, said method comprising providing a moistened non-woven fibrous web wherein the average fiber diameter is up to 50 microns, contacting and rubbing the lens with the fibrous web, and removing the lens from contact with the fibrous web.

Abstract: A fingernail refinishing product and method for dissolving and removing old lacquer nail polish, for softening and conditioning fingernails, cuticles and surrounding skin, and for depositing a clear nail-strengthening priming coat, all simultaneously, in preparation for the application of fresh nail polish. The product comprises a spill-proof applicator in the form of a reclosable container filled with a slitted sponge saturated with a water-miscible liquid composition which contains solvents, film-forming and nail-strengthening ingredients, and substantial amounts (up to 25% by weight) of an emollient-emulsifier-cleaner formed by the sulfonation reaction of the ricinoleic acid in castor oil. The three-function fingertip treatment--polish removal, conditioning, and nail prime-coating--takes place inside the applicator and is accomplished by the insertion of each fingertip, at least one at a time, into contact with the liquid saturated sponge.

Abstract: A cleaning composition particularly suited for removing dried printing ink residue from a substrate is described comprising a chlorinated hydrocarbon liquid, a petroleum distillate, an aliphatic alcohol and aqueous ammonia.

Abstract: The invention relates to a composition suitable for use in cleaning panes of glass, consisting of a pelleted blend of surfactants, the composition containing:(a) a water-soluble alkali metal polyphosphate of high molecular weight with a P.sub.2 O.sub.5 -content of 60 to 70 weight %;(b) at least one alkali metal carbonate or hydrogen-carbonate;(c) at least one crystalline substance producing an acid reaction in aqueous solution;(d) at least one anion-active and/or non-ionic surfactant; and(e) at least one filler, if desired or convenient.

Abstract: Toner is removed from the surface of a drum coated with a photo-sensitive material by bringing a cleaning blade into contact with the surface when the drum is stationary, rotating the drum at a monotonically increasing rate of speed until a predetermined rotational speed is reached, monotonically increasing the contact pressure exerted by the blade against the drum surface while the drum speed is being increased so that the contact pressure reaches a maximum contact pressure when the drum reaches the predetermined rotational speed, and maintaining the maximum contact pressure while the drum continues rotating at the predetermined rotational speed.

Abstract: A method and apparatus for cleaning the faces of plastic forming metal molds in which brush members opposite to the mold faces are vibrated by a suitable vibration-applying member. The tips of the brush members beat and break flashes of residual plastic stuck to the metal mold faces, thereby to remove the flashes. The thus removed flashes are sucked and taken out from the metal mold faces by sucking means, thus cleaning the metal mold faces.

Abstract: An apparatus for cleaning a lighting fixture louver of the type which has parabolic cells that are open top and bottom. A cleaning roller of a graft polyol polyether urethane having an indentation load deflection of the order of 100 has a surface which consists of circumferentially discrete rows of individual cleaning lugs, and each row has enough lugs to clean an entire row of cells in a louver module, with a longitudinal and circumferential lug pitch equal to the pitch of the louver cells. Each cleaning lug has a perimetrical surface that may scrub the surface of the entire wall means of a cell, and has a radial depth slightly greater than the louver depth. The cleaning roller is journalled atop a cleaning liquid tank with its lower portion in the liquid, and a pressure roller surmounts the cleaning roller to press a louver onto the cleaning roller with a row of louver cells fully engaged with the row of cleaning lugs at the top of the roller.

Abstract: A water disperser, carried by the water closet of a flush toilet, to dispense water to wet toilet paper before use. Water is provided by the water closet supply system and the unused portion is wasted to upon associated toilet bowl. The device disperses water on manual activation through a secondary reservoir in relatively low volume flow, in a linear pattern of some length and for a pre-determined period of time.

Abstract: A method and apparatus for collecting flat or semiflat materials while simultaneously retrieving bottles and cans includes a ground engageable rotating drum (52) with a plurality of fingers (60) extending radially from the drum. A plurality of toothed discs (210) is rotatably mounted on a shaft and driven in conjunction with the rotation of the drum in a direction opposite that of the drum. The toothed discs (210) are positioned adjacent to but above ground level during operation of the apparatus and assists in the engagement and movement of objects by the drum and fingers to a collection location (32). A plurality of belts (130) is engaged between pulleys (212) mounted intermediate of the toothed discs (210) and corresponding pulleys (126) on a shaft spaced from the toothed discs. The belts are positioned on the trailing side of the drum and above the toothed discs and assist in engagement and movement of objects by the drum and fingers to the collection station.

Abstract: A method of exfoliating the coating of a coated optical fiber is described. A crack in the coating layer of the optical fiber is produced by bending means, cleaving the coating into a plurality of cleaved strip pieces while longitudinally enlarging the crack, and then cutting the strip pieces with an advantageous exfoliating tool. The exfoliating tool thus used is constructed to conveniently cleave the coating layer of the optical fiber and to cut the cleaved strip pieces. It does not damage the optical fiber upon exfoliating of the coating layer from the coated optical fiber, and can efficiently exfoliate the coating of the optical fiber.

Abstract: A process of cleaning the film transport rolls of developing apparatus having a transport system comprising a plurality of pairs of rolls for transporting the film from an inlet through successive aqueous baths and a drying section and out of a discharge, some of the rolls being above and others below the liquid level in the baths comprises passing lengthwise through the transport system of the apparatus a rectangular sheet of fleece material having fibers oriented parallel to one another and to the longitudinal edges of the sheet. The fibers are made of a material which is substantially free of swelling by the action of the baths of the developing apparatus. However, the liquid of the baths is absorbed in the interstices between the fibers of the fleece material so that as the cleaning material passes along the transport system it moistens those rolls which are above the liquid level and may have dried out. Any soluble impurities on such rolls are thereby dissolved.

Abstract: Improved apparatus for cleaning generally cylindrical articles of irregular configuration and, particularly, for cleaning straps of the type used to hold magnetic tape and supplied by manufacturers for use with magnetic tapes. The apparatus comprises a porous cleaning element comprised of multiple felt-cleaning faces resiliently mounted for contact with the inside of the cylinder, or ring, of the strap. The porous elements form means to remove dirt from the article being cleaned without any accumulation of excess dirt on the cleaning head.

Abstract: An adjustable clamp (26) for selectively varying the hinging action of a flexible, inflatable fluid-stripping bag (12) including an elongated bag inlet (14) having a predetermined cross-sectional area and a nozzle (16) at one end thereof and wherein the bag inlet (14) is mounted about an opening (24) of a plenum (20) for supplying air to the bag (12). The clamp comprises an adjustable frame (26) adapted to be disposed about the bag inlet (14) and spaced therefrom to adjustably limit the extent to which the bag inlet (14) opens to determine the cross-sectional area and a band member and fastening device for securing the frame (26) about the bag inlet (14) whereby a change in the cross-sectional area produced by the frame (26) changes the resistance of the hinging action of the bag (12).

Abstract: Less viscous liquids (7) such as diesel oil may be unintentionally spread on water surfaces or on the ground (6). Loose sawdust (2) or chemicals are used to clear said surfaces (6). These clearing aids (2) with the liquid (7) absorbed in them are difficult to remove. The use of cases (5) of filter material, filled with sawdust (2) provides an aid which is easy to remove when the liquid has been cleared.

Abstract: Electrostatic toner particles are removed from the cylindrical surface of a cold pressure fusing roller by contacting the surface with a section of wire helically strung across the surface. The wire is secured to a pair of discs flanking the ends of the roller and having diameters less than that of the roller.

Abstract: An apparatus for removing dirt and debris from clumps of down cotton that are released from slots of a group of retrieving belts as the belts pass around a rotating pulley that causes the slots to open includes a first group of approximately semi-circular, parallel tines disposed adjacent to the portions of the belts passing around the pulley. A plurality of fingers extending from the pulley and between the belts into the region bounded by the first group of tines and the belts urges the released clumps slidingly along the tines, and apply forces that loosen dirt and debris, which pass between the tines. The clumps ejected from the upper end of the region are received by pegs of a rotating peg drum and are moved against a second group of approximately semi-circular, parallel tines. The pegs tend to "thump" the cotton clumps as they slide along the second group of tines, further breaking up dried mud and debris therein and causing it to pass outward between the tines of the second group.

Abstract: An improved filtering system that includes a cleaning assembly and a filter element in the form of a plate or drum with a plurality of long, narrow through openings or slits in each of a plurality of rows. The improved cleaning assembly and filter element includes slit cleaning elements connected downstream of the hill and dale filter element or an improved slit cleaning element upstream of the flat surface or drum surface of a filter with upstream connecting slits. The cleaning assembly may also include a scraper cleaning element positioned for relative movement in relationship to the filter element. As fluid enters the filtering system, the debris or trash is filtered from the fluid and deposited on the upstream surface of the filter element and in the slits for removal by the cleaning assembly.

Abstract: Method and device for treatment of balls, in particular balls for rolling bearings, by gentle mechanical treatment in the presence of a cleaning fluid or the like. According to the invention, the treatment of the entire surface of each ball is accomplished in that the balls are moved between two mutually rotating discs (12,24) while being forcedly guided (19,20) in a spiral path outwardly from the center while skidding.

Abstract: A method and apparatus for sterilization of contact lenses characterized in that the lenses are enclosed in the interior of a sealtight chamber having rigid and indeformable walls, the following sequence of steps being performed:(a) introducing in said chamber a carbon dioxide stream;(b) producing a vacuum in the interior of said chamber, and(c) filling said chamber with carbon dioxide until a preselected pressure is attained.

Abstract: A lens cleaning and polishing method utilizes a stretcher frame mounting a soft pliable lens cleaning and polishing cloth. A hand held suction handle is used to hold one side of a contact lens against the cloth. When the concave side is held against the cloth, the cloth is tented with the finger of the user or a similar shaped object to have the cloth conform to the concave surface. When the convex surface is to be polished, it is placed directly against the cloth and pressure applied. In each case, the cloth covers a substantial portion of the curved surface. The cloth is wetted with a polishing cleaning material and the lens is rubbed with respect to the cloth in order to polish and clean the lens rapidly and efficiently in a hand operation.

Abstract: Apparatus for cleaning glass or other nonporous surfaces having an applicator pad of open pored spongy material for juxtaposition with the surface to be cleaned. A disposable cloth or tissue is interposed between the pad and the surface to be cleaned. A flexible conduit directs moisture laden gas, usually human breath, from the user's mouth, to the applicator pad and thence to the surface to be cleaned where moisture condenses for easy removal of soil therefrom. The escape of gas in undesired directions is avoided by a hood element which confines the gas to the spongy material except where it contacts the surface to be cleaned.

Abstract: A method for washing a vehicle is disclosed in which a brush assembly, which includes a brush, a brush shaft supporting the brush, a brush motor for driving the brush shaft and a flexible coupling, is permitted to swing or tilt in response to the force exerted on the brush by the movement of the vehicle relative to the vehicle washing apparatus. The flexing of the flexible coupling, which couples the brush shaft to the support arm, permits the brush to tilt or swing in any direction. The brush motor rotates the brush in a direction which causes the brush to walk along the front of the vehicle. As a result, the cooperative action of the rotary reaction force of the brush and the flex of the flexible coupling causes the brush to turn the front corner of the vehicle and pass along the side of the vehicle. Similarly, the flex of the flexible coupling together with the rotary reaction force of the brush against the vehicle enables the brush to wash the side and turn the rear corner to wash the rear of the vehicle.

Abstract: A method and machine for cleaning carpet, and the like floor surfaces, are disclosed which include a vibrating type machine having a vibrating drive plate which carries a layer of plastic barbed bristles facing the carpet. A piece of terry cloth is placed between the bristles and the carpet and the barbed bristles hook the loops of the terry cloth for attachment and massage the carpet through the terry cloth to impart a scrubbing motion to the cloth. Use of short looped terry cloth having terry loops of about one-fourth of an inch (1/4") or less effectively results in transmission of machine motion for effective machine movement and cleaning. The method contemplates moistening a piece of terry cloth with a cleaning solution so that soil is removed and absorbed by the terry cloth without any significant wetting of the carpet after which the terry cloth may be removed from the barbed bristles and utilized on a reverse side or replaced.

Abstract: The system comprises a flexible line provided with means for collecting products scattered at the water bottom by circulating the flexible line in contact with these products. On the rising portion of the path followed by the flexible line, the collecting means are passed through a tubular casing for simultaneously protecting the surrounding water against pollution from products released, while hoisting the products to the surface.

Abstract: Contaminants that accumulate on test probes utilized to contact aluminum pads on integrated circuit chips cause the probe resistance to become unacceptably high. As disclosed herein, the contaminants (predominantly a mixture of aluminum and aluminum oxide) are substantially removed by immersing the probes in boiling water. Adding small quantities of phosphoric and/or hydrofluoric acids to the water further improves the cleaning action.

Abstract: A solvent-evaporation type of deodorant is added to the windshield washer fluid reservoir of a motor vehicle. When the material is sprayed onto the windshield of the vehicle while the vehicle's air conditioning (heating, cooling or ventilating) system is running, the deodorant is drawn into the vehicle passenger compartment where it dissolves odor-causing particles and removes them.

Abstract: An improved composition suitable for cleaning and protecting various substrates, comprising 1,1,1-trichloroethane, poly-(methylhydrosiloxane), tin octoate and zinc octoate.

Abstract: An improved front-end loader apparatus for collecting particulate material on a roadway surface comprising a frame assembly drivingly supported on the roadway, a windrow formation assembly supported at the forward end of the frame assembly for brushing particulate material into a windrow, and a feeder assembly disposed to engage the windrowed material up and onto a roadway scraper blade supported at the forward end of the frame assembly. An elevator assembly is disposed to receive the particulate material from the feeder assembly and elevate the material to a rear overhead discharge position. A residual material cleaning assembly is supported beneath the frame assembly and rearward to the feeder assembly for cleaning up residual material not collected by the feeder assembly, the residual material cleaning assembly directing the residual material to the elevator assembly so that the residual material is elevated to the rear overhead discharge position.

Abstract: A car to be washed is moved longitudinally along a path through a washing station, a prerinsing station, a rinsing station and a drying station. At the washing station the car is scrubbed with hot, soapy water. In the prerinsing station the car is sprayed with water mixed with a surface-tension-increasing agent. In the rinsing station the car passes under a curtain down which flows a film of pure water. The curtain is formed of a multiplicity of parallel vertical filaments that conduct this rinse water with the surface-tension-increasing agent as a substantially continuous film over the vehicle.

Abstract: A method and apparatus for washing the surface of an object in which a rotating brush is provided. The bristles of the brush are supplied with a washing liquid through a hollow shaft for a limited angular rotation so that the washing liquid effectively is transmitted to the ends of the bristles substantially only during the time they make contact with the surface.

Abstract: A method for clearing a railway roadbed of loose material employs elongate sweeper bristle elements, each element comprising a stem terminating in a knob portion which functions as a solid weighting mass and which forms a forward wearing surface. The method includes the steps of rotating a plurality of the sweeper bristle elements over the railway roadbed to be cleared so that the ends of the elements contact the loose material; imparting a centrifugal force on the stem and knob; and striking the loose material with the knob, thereby causing the loose material which contacts the knob to be driven away from the element.The preferred sweeper bristle elements are each comprised of a solid elastomeric stem preferably made of 80 durometer rubber. The stem extends substantially the length of the element and has upper and lower portions. A solid weighting mass forming a forward wearing surface and preferably made from 60 durometer rubber is attached to the lower portion of the stem.

Abstract: A composition containing organic compounds for plasticizing resins, an emulsifying agent, a thickening and suspending agent and possibly an inert filler and/or water, is applied to an emulsion-painted wallpaper surface and left for several hours to allow the compounds to act on the binder resins in the paint coating. The resulting cohesive, plasticized paint film may then be removed by scoring and removing strips of the film and adhering wallpaper, starting from the score mark, any remaining paint and underlying paper being removed by scraping after possible application of water.

Abstract: A rotating brush provided with a flexible plastic brush shaft is placed in contact with the front of a vehicle in a vehicle washing apparatus. The combined action of the rotation of the brush and the flex of the plastic brush shaft causes the brush to walk along the front of the vehicle and to turn the front corner of the vehicle and pass along the side of the vehicle. In a similar manner, the brush can be made to turn the rear corner of the vehicle thus enabling the brush to wash the front, side and rear surfaces of the vehicle.

Abstract: A water damaged carpet and pad assembly are restored to their normal condition while substantially maintained in an installed, normal floor covering position by extracting excess water from the upper surface of the carpet, applying mildecides, cleaning and drying agents to the upper surface of the carpet, blowing air under the carpet and pad assembly for drying purposes and then deodorizing the carpet and pad assembly by introducing a deodorizing agent into a current of forced air directed to flow between the under surface of the carpet and the upper surface of the pad.

Abstract: Method for removing material from the surface of fruits and vegetables (produce) and separating the removed material from the resultant mixture utilizes the rotation of an upwardly directed cage formed of elongated rotating spindles having a material removing surface thereon, the cage rotary speed being sufficient, at the interior radius thereof, to maintain the produce in continuous centrifugal force contact against the spindle material removing surface, but generally insufficient to prevent downward movement or migration of the produce within the cage under the force of gravity. Produce to be treated is urged into engagement with the spindles and the rotating cage causes the produce to accelerate substantially to said rotary speed, whereby the produce travels with the cage in contact with the rotating material removing spindle surfaces.

Abstract: A drum-type rotary scraper, for use in a corner, scraping a surface by the snapping reformation of elastically restrained portions of flexible fingers deformed from their normal circular path by the constraint of the planes forming the corner.By way of an example, a cylindrical bird-cage broom whose tips rotate bluntly and ineffectively against a first plane surface while the drum surface of the fingers immediately adjacent the tip ends, in deforming and scraping on the second and snapping onto the third of surfaces defined by the intersection of three planes at right angles, removes paint from two of these relatively inaccessible surfaces.

Abstract: Vehicle washing apparatus includes a turntable for reception of a vehicle on it at an entrance point. Two arm and brush assemblies are provided at opposite sides of the path of the vehicle onto the turntable to scrub upstanding exterior body surfaces of the vehicle. The turntable is rotated with the vehicle on it, as the brushes are moved by the vehicle body surfaces and scrub the entire perimeter of the vehicle at least once with both brushes, using a 360 degree rotation of the turntable. Articulated brushes, in one embodiment, are employed with brush reversal for additional brushing of the rear end as the vehicle is moved off the turntable. Oscillating friction strips are provided at the entrance for cleaning top surfaces of the vehicle, and a dryer unit is provided at the exit point for drying the vehicle. Conveyors are employed at the entrance and exit points as well as on the turntable itself, for conveyor movement of the vehicle, if desired.

Abstract: During the labeling of a vial, mislabeling can occur. The unwanted label is cleanly and economically removed by forcing the vial through a novel collet-cutter. The cutter has at least two cutting edges and two slots. The slots permit expansion of the diameter of the cutting edges during the passage of a vial. At least one of the edges of the slots is outwardly sharpened. Further, its cutting edges are at an angle to the incoming vial and have an internal diameter whereby the label is removed completely and cleanly when the vial is forced through the cutter.

Abstract: A method for removing a reflective decal from a vehicle's body surface, especially a baked enamel surface as would be found on a truck or an automobile. The method includes the steps of contacting the decal, for a period of time sufficient to loosen the decal from the surface, with a composition consisting essentially of methylene chloride, a lower alkyl alcohol, a lower aliphatic symmetric or unsymmetric ketone, methyl cellulose and polyethylene glycol, and separating the loosened decal from the surface with a high pressure stream of liquid.

Abstract: The use of a diluted aqueous extract of oak leaves as a cleaner and plant growth stimulant is described. To provide the extract, dried leaves are preferably boiled in water to extract and disperse natural tannins and waxes from the leaves into the water. The extract is diluted with water for use as a cleaner, particularly for window glass, or for use in stimulating the growth of plants.

Abstract: In electrographic apparatus having a cleaning station with a rotating cleaning brush which removes residual toner from a reusable imaging surface, a rotating comb has bristles in engagement with the brush. The bristles of the comb are arranged in two opposed helical segments for removing toner particles from the brush and for transporting such toner particles along a path to a collecting region to facilitate their effective removal by a vacuum system. Residual toner is removed by rotating the comb at an angular velocity 25 to 50 percent greater than the angular velocity of the cleaning brush.

Abstract: An electrophotographic developing apparatus comprises a developing roller and a refreshing roller. The developing roller applies liquid developer to an electrostatic latent image carrier moving in a predetermined direction. The refreshing roller comes into contact with the developing roller and rotates at the same peripheral speed as that of the carrier and in the opposite direction to the moving direction of the carrier. The rotational motion of the refreshing roller causes the developing roller to rotate so as to effect developing the electrostatic latent image on the carrier.

Abstract: A cleaning fluid is used in a method for cleaning the white undersurface of a flexible or partly flexible mat cover of a photocopy machine. The cleaning fluid is essentially 1,1,1, trichloroethane to which a small amount of linseed oil is added to prevent evaporation and to provide a very thin coating of antistatic film to the cleaned surface of the mat. To this chemical cleaning agent a small amount of perfume or scent and a coloring agent are preferably added to make the chemical more appealing to the casual user. The mat is cleaned by scrubbing it with a coarse-faced pad or sponge impregnated with the cleaning fluid to remove accumulated dirt, oil, carbon inks and the like from the white undersurface.

Abstract: A process for washing exposed photosensitive resin printing plates to remove uncured resin with a washing liquid, said process comprising a first step in which the washing liquid is sprayed on the surface of the resin plate attached to the surface of a rotary drum while rotating said drum to remove most of the uncured resin, and a second step in which the remaining uncured resin is perfectly eliminated by contacting a rotating brush against the surface of the resin plate on said rotating drum.

Abstract: Method and wrap around car wash apparatus are disclosed for maintaining uniform crush pressure of a rotary brush against a predetermined surface area of an advancing vehicle. A constant counterclockwise torque is produced on an outer arm by means of a rotating gear connected to the outer arm and a rack driven by a first pneumatic cylinder. After the rotary brush passes around the front edge of the vehicle, an inner arm pivotally connected to a support and the outer arm rotates counterclockwise until a maximum knuckled relationship between the inner and outer arms is attained. As the rotary brush, rotating clockwise, passes around the rear of the vehicle, the rotary brush bites into the rear corner producing a reaction force which causes the inner arm to be forced counterclockwise against a compression spring. The compression spring then boosts the inner arm in the clockwise direction, causing the rotary brush to be pushed into the rear end of the vehicle.