Abstract: A process and apparatus for an electrostatic spray coating operation wherein liquid overspray in the spray coating operation is collected and drained onto a workpiece support. The overspray is then removed from the workpiece support by a squeegee blade wherein the collected overspray is drained into a sump. From the sump, the spray, and optionally with makeup liquid, is recycled to the spray head.

Abstract: Methods and apparatus for automatically cleaning a roll for handling sheet stock while in service, including single ended reciprocally actuated scrubbing of a fully roll surface width polishing surface swingingly engaged with the roll surface to provide effective cleaning action without leaving residual scars on the roll surface. Single ended actuation of the scrubbing action is enhanced with special self aligning bearings.

Abstract: Particulate material from a conveyor belt may be removed by a conveyor belt scraper comprising a flexible wear element for bearing against the working surface of the conveyor belt and a housing shaped and dimensioned for dispensing one end of the wear element against the conveyor belt and for storing the rest of the wear element in the interior of the housing. The transverse dimensions of the interior of the housing are less than the length of the wear element. The housing is pressure-tight up to a given operating pressure when the wear element is within the housing. The housing is adapted to be filled by a fluid, such as a gas or liquid, which when compressed acts directly on the wear element within the housing to force the wear element against the conveyor belt and to maintain the wear element against the conveyor belt as the wear element wears.

Abstract: A conveyor belt cleaner including an elongated support member extending across but spaced from the conveyor belt comprises a mounting plate including a plurality of anchor apertures at spaced intervals along its length and a corresponding plurality of molded, resilient resin cleaner blade support arms each slotted to receive the mounting plate and each secured on the mounting plate by an anchor lug engaged in an interference fit in one of the anchor apertures. A corresponding plurality of molded, resilient resin cleaner blade units are mounted on the outer ends of the blade support arms; each blade unit has a keyed, slotted interference fit with its support arm. C-shaped metal reinforcements molded into both ends of the blade support arms reinforce the slot mountings.

Abstract: The invention relates to a stripping device for the return area of conveyor belts. To set up parallelity between the individual stripping lamellae (4) and the belt surface, an adjustment about an axis (20) a swivelling movement is proposed which forms an angle .alpha. with the belt surface which differs from 90.degree., In a further development, it is provided that it is also possible to adjust the height setting and the contact pressure force of each stripping element (1) against the belt surface. For this purpose, a displacement of the stripping element (1) about and axis (40) is taught which extends essentially vertically with respect to the surface of the belt (8).

Abstract: A method and apparatus for cleaning a conveyor belt includes placing a rotatable cleaning roller in close proximity with the belt. The roller includes a plurality of radially extending vanes configured in the form of a so-called chevron helix. The roller is supported within a frame member, which in turn is attached to the support structure of the conveyor. The frame member includes an adjusting mechanism which adjusts the position of the belt relative to the roller. A sealing arrangement establishes an effective air seal between the roller and the belt to permit a vacuum source to aid in the removal of material from the belt.

Abstract: A scraper device to clean conveyor belts includes a bearing axle located below the conveyor belt for a blade holder having spring arms which can be mounted on the axle. The holder carries scraper blades at the end which in a preset angle of pitch are pressed against the conveyor belt. The spring arms comprise parallel guide rods of resilient material. The arms support the blade in a vertical position pressed against the lower segment of the belt. The angle of pitch is, in an advancing position of the scraper blades, maximally up to 10.degree.. In this way, with minimal wear and tear, optimum cleaning effects are achieved which, at the same time, show careful treatment of the belts.

Abstract: A cleaner for a conveyor belt includes a scraper arranged transversely of the belt on the return side of the same. The scraper is adjustably mounted for displacement about an axis extending in the transverse direction of the belt. The scraper has a scraping portion thereof which intends to come in close contact with the surface of the belt and is deflected from the common axis at a point midway between both side ends of the belt so as to form an arch shape.

Abstract: A tensioning arrangement is provided to position belt cleaner blades relative to conveyor belt, which arrangement includes an inflatable bladder which acts to move a pivotally mounted crank, which, in turn, moves a support shaft, which carries the cleaner blades. Pressurization of the bladder causes it to expand thereby engaging the arm which moves the support shaft to a position at which the cleaner blades engage the belt to be cleaned.

Abstract: A conveyor belt scraper assembly includes an array of transversely extending, flexible scraper members engaging, in an operative position, a conveyor belt surface to be cleaned. The flexible scraper members are resiliently biased in frictional engagement with the curved surface of the conveyor belt by a tension spring. Each scraper member includes a flexible tension member, a plurality of scraper blades movably coupled to the tension member, and spacer springs yieldably separating the scraper blades. The scraper blades are differently sized relative to each other to impose different static deflections at separate points along the flexible tension member relative to the conveyor belt surface. According to this arrangement, the deflection forces are shifted to the scraper blades along the trailing end of the cable, thereby avoiding a concentration of forces on the leading scraper blade which could lead to premature wear and breakage of the tension member.

Abstract: A conveyor belt comprising an endless belt of a flexible material, and having an upper carrying run and a lower run (1) in which at least one stripper device is provided. The stripper device comprises a frame (2) including a plurality of stripper bars which are mounted on the frame. The stripper bars bear their free edges against the upper face of a run of the conveyor belt, and are formed by a V-shaped bar (4) with relatively short legs (4', 4"). The V-shaped bar has its tip upstream in relation to the direction of movement of the belt. The stripper device also includes a plurality of elongate bars (5, 6) which substantially form extensions of the legs of the V-shaped bar (4). These bars (5, 6) are placed further inwards in relation to the respective legs (4', 4") of the V-shaped bar (4) in such a manner that neighbouring ends of the legs of the V-shaped bar and of the elongate bars overlap.

Abstract: A conveyor belt scraper unit has two pairs of arms for connection to fixed supporting structures on either side of a conveyor belt. The two arms of each pair can be pivoted with respect to one another. One arm carries a reaction roller on one side of the belt and the other arm carries scraper blades. A spring urges the arms together so that the scraper blades scrape the belt in opposition to the roller. The various components of the unit are manufactured from corrosion-resistant materials, making the unit eminently suitable for use in corrosive atmospheres.

Abstract: A cleaning device for a drum being partially looped around by a conveyor belt having an upper and a lower stringer, the cleaning device being arranged in between the upper and lower stringers and comprises a plurality of strippers disposed for abutting the drum; a hydraulic cylinder mounts said strippers and a piston rod mounts carrying a piston, mounts the hydraulic cylinder which reciprocates on the piston; a plurality of downwardly extending soil shifting plates are mounted on the cylinder and move therewith; a dirt catching trough is pivotally mounted underneath the cylinder and stripping bars extend across an open surface of the trough and being in engagement with the soil pushing plates for cleaning these plates upon pivoting of the trough.

Abstract: A scraper device for fitting to an endless conveyor belt or similar device, comprising of a set of scraper elements (1, 1') supported by an elongate carrier member. The scraper elements (1, 1') are mounted on at least one bar-like member (2, 2') which extends parallel to the carrier member and rests on the upper face of the carrier member. The bar like member is fastened relative to the carrier member by detachable fasteners (8, 9; 10, 11, 12) which are mounted at the ends of the bar-like member. Preferably the fasteners are formed by at least one pin (9) projecting from a side edge of the carrier beam (7) and at least one recess formed in the bar-like member (2, 2') in which recess the pin is received and by an upstandiong flange (10) which is provided with an opening. The upstanding flange lies next to a flange formed on the carrier beam which is also provided with an opening. A securing fastener is inserted through the respective coinciding openings in the flanges.

Abstract: A conveyor belt scraping apparatus includes a pair of scraper blades connected to a pivoting mounting member. The upstream blade is oriented so as to engage the belt at substantially a 50.degree. angle while the downstream blade is oriented substantially perpendicular to the belt. The scraping pressure applied to each blade is controlled by a pair of actuator cylinders connected between a rigid frame and the pivotal blade mounting member. By extending or retracting piston rods of the cylinders, pressure on one blade is increased while pressure on the other blade is reduced. The blade scraping pressure is adjusted in this manner to provide the best scraping action. The apparatus also includes a mechanical back-up system to provide scraping pressure to the blades in the event the actuator cylinders fail. Further, the apparatus includes a switch that is connected to the conveyor controller.

Abstract: A scraper device having a number of identical scraper elements that extend one beside another substantially over the width of a conveyer belt. Each scraper element basically comprises: a metal scraper or doctor blade that is in resilient engagement with the conveyer belt; an arm that supports the scraper blade; and a resilient articulation that is disposed at the free end of the support arm. The stationary part of the articulation is releasably secured to a common support tube that extends transverse to the direction of conveyance and parallel to the conveyer belt. The point where the scraper edge engages the belt in relation to the pivot axis of the resilient articulation is such that the base of a perpendicular line from such axis to the belt lies on the approach side of the belt at a slight distance ahead of the point of engagement.

Abstract: Conveyor belt cleaning apparatus having a scraper assembly including at least one scraper element urged into engagement with the conveyor belt, the opposite ends of the scraper assembly being connected to respective locating arms and the locating arms being mounted at their ends remote from the scraper assembly on respective mounting blocks of composite construction which can be subjected to torsion, there being at least one other resilient means acting to urge the at least one scraper element into engagement with the conveyor belt.

Abstract: A conveyor belt cleaning assembly including at least one generally transversely extending cleaning device, engaging, in an operative position, a conveyor belt surface to be cleaned. The cleaning device includes a plurality of wear resistant scraper elements supported by a flexible tension member and resilient spacer coils coupled between the tension member and scraper elements for compressively engaging and yieldably maintaining the scraper elements at separate scraper positions along the tension member. Cable strand damage caused by pinching engagement of the scraper elements in response to deflection movement is reduced by mechanically decoupling the spacer coil end turns with respect to the cable. The scraper elements are mechanically engaged by oversized compression coils and spacer sleeve combinations, with scraper element deflection forces being reacted by axial compression of the spacer coils.

Abstract: The invention provides for a mounting for a belt scraper assembly to permit displacement of the assembly when the belt executes a reverse movement. It includes a pivoted lever arm arrangement whereby the assembly can execute an arcuate movement during reverse movement of the belt. It further includes torque storage means which maintains the scraper in contact with the belt and resists arcuate displacement of the assembly.

Abstract: A conveyor belt scraper blade assembly having an elongate blade body made of a resilient material and having a longitudinally-extending belt scraping surface, a frame attached to the body which imparts a convex shape to the belt scraping surface, and a pair of brackets mounted on the ends of the body for attaching the blade assembly to supporting structure. In a preferred embodiment, the blade body includes a central longitudinal slit and the frame includes an insert having a double convex shape which is fitted within the slit. The frame further includes a pair of opposing side walls which are attached to the insert and include a plurality of inwardly-directed prongs which engage the blade body and hold the body in position relative to the insert.

Abstract: A scraper cleaning apparatus for reversible conveyor belts comprising a plurality of individual scraper elements which are all simultaneously pressed against the belt by the coordinated operation of first and second flexible vessels by which the scraper elements can be disengaged from the belt when reversing the direction of movement of the belt.

Abstract: A scraper device for conveyor belts, having a scraper which extends in the direction of the width of the conveyor belt and is seated on arms which extend in the longitudinal direction of the conveyor belt and are adjustable with respect to the bottom of the conveyor belt, each arm being formed by a package of leaf springs of different length, arranged in the form of fish scales one above the other, the longest of which leaf springs, which faces the conveyor belt, bearing at its end region the holding bracket for the scraper and extending, together with the remaining leaf springs, from a support (20) which is swung by rotation of a shaft (22). In order to obtain a rapid adjustment of the application pressure, a spring (31) which urges the support (20) in the application direction of swing is arranged between the shaft (22) which is provided with a graduated-scale (38) and the support (20) which is turnable relative to the shaft (22).

Abstract: A conveyor belt scraper assembly includes an array of transversely extending, flexible scraper members engaging, in an operative position, a conveyor belt surface to be cleaned. Each flexible scraper is resiliently biased in frictional engagement with the curved surface of the conveyor belt by a tension spring. The scraper members are supported in the operative position by upper and lower crossbar support members. In the preferred embodiment, the upper crossbar support member is articulated or segmented. The separate crossbar portions are independently rotatable from a nominal resting position in which the associated scraper member is held in helical engagement with the conveyor belt. The segmented crossbar portions are pivotally mounted onto an axle and are rotatable through an arc of approximately 90.degree.

Abstract: The present invention relates to a self-adjusting apparatus for use in cleaning the surface of endless belt conveyor belt apparatuses and the like. The apparatus is characterized by a blade tip which is positioned to contact the surface of the conveyor belt at a location where the conveyor belt is in contact with a head pulley, snub pulley, idler roller, or the like. The blade tip is attached to a rotatable and translatable support structure. The support structure comprises a plurality of tortion units which permit the blade tip to move in response to deformations of the surface of the conveyor belt during the operation of the conveyor belt.

Abstract: A motorized vehicular vacuum street sweeper (2) has a hopper (12) for receiving suctioned debris and includes unloading devices (36) provided by a flexible sheet-like wrapper (38) in the hopper forming a receptacle cavity (76). The wrapper is flexed by actuation devices (74) to shrink the cavity and expel debris through an exit door (40) in the hopper.

Abstract: A conveyor belt cleaning arrangement consisting of a transversely disposed support which includes a plurality of connector slots. One or more elastomeric cleaner blades, either of the doctor blade type or the arm and blade type, include a locking device to releasably connect the blade to the support without the use of fasteners and secure the blade against lateral motion and hold the blade in position for cleaning the belt.

Abstract: A device in bearing element (1) for a rotating shaft (2) in a machine, including a bearing housing (4) for each individual bearing element secured to a machine member (7) by a locking ring formed with a set of screw holes (13) through which pass a set of screws (12) in order to be secured to the bearing housing with the machine member sandwiched therebetween. The device comprises a retainer element (15) having an attachment plate (17) with a circular aperture and with a retainer (19) arranged on the attachment plate to fasten a member associated with the machine.

Abstract: A tensioning arrangement is provided to position belt cleaner blades relative to a conveyor belt, which arrangement includes a linkage connection to vary the force which the blades exert against the belt and an over-center camming feature which locks the blade in the cleaning position to prevent disengagement.

Abstract: This invention relates to a conveyor scraper assembly which includes a track arrangement which is adapted for location beneath a conveyor belt, a carriage which is adapted for engagement with and sliding movement on the track arrangement, means for locking the carriage to the track a plurality of aligned scraper blade assemblies and springs resiliently connecting the blade assemblies to the carriage.

Abstract: A conveyor belt cleaner having at least one blade mounted on a blade carrying member for scraping an endless conveyor belt. The blade carrying member substantially encloses and is telescopically received on a vertically adjustable elongate support member. A plurality of rollers are located between the blade carrying member and support member for rolling the blade carrying member on and off the support member to service the conveyor belt cleaner. An adjustment mechanism is provided for shifting the support member to change the amount of pressure with which the blade engages the endless belt. The tubular support may be segmented to facilitate removal in confined areas and to permit repair or replacement of individual segments.

Abstract: A conveyor belt cleaner having at least one blade yieldably mounted on a blade support assembly for scraping an endless belt. The blade support assembly includes a spring support and a spring cradle pivotally mounted within and angularly adjustable upon and secured to the spring support. A helical spring is mounted within the spring cradle and has one end anchored thereon. The other end of the helical spring terminates in a spring arm for supporting the blade.

Abstract: A conveyor belt cleaner having at least one blade mounted on a blade carrying member for scraping an endless conveyor belt. The blade carrying member substantially encloses and is telescopically received on an arcuately pivotal elongate support member. A plurality of rollers are located between the blade carrying member and support member for rolling the blade carrying member on and off the support member to service the conveyor belt cleaner. An adjustment mechanism is provided for arcuately shifting the support member to change the amount of pressure with which the blade engages the endless belt. The tubular support may be segmented to facilitate removal in confined areas and to permit repair by replacement of individual segments.

Abstract: A plurality of molded, resilient elastomer blade supports are mounted on and keyed to a shaft extending across and spaced from a conveyor belt; each blade support includes an integral blade mount projection on which a scraper blade is mounted. A torsion bias mechanism, using a resilient resin torsion tube, biases the shaft to rotate the scraper blades toward the conveyor belt to compensate for wear and absorb shocks. In some embodiments, the blades are integral with the blade supports; in others, each blade is connected to its support by a connecting rod that includes a resilient joint for added flexure in the overall scraper structure.

Abstract: The invention has to do with a system of elements for keeping a scraper blade in position under an endless conveyor belt, the system being made up of a support, a spring joint and a cross piece running across and under the belt. There is an element bracket so that the unit made up of these parts may be rocked about an axis running in the length direction of the belt. In this way it is possible to put every scraper edge on a blade into a position in which it is truly parallel to the lower face of the endless belt in very simple way.

Abstract: Scrapers of particular mechanical, chemical, and electrical properties are arranged to maintain mechanical and electrical contact with the surfaces of moving belt conveyers so as to provide for rapid electrical discharge of such surfaces and the particles on such surfaces and the mechanical removal of such particles from such surfaces during the brief time that such surfaces are in the intended zone of discharge of particulate material therefrom.

Abstract: A conveyor belt cleaning assembly including at least one generally transversely extending cleaning device, engaging, in an operative position, a conveyor belt surface to be cleaned. The cleaning device includes a plurality of wear resistant scraper discs supported by a flexible tension member and resilient spacer coils coupled between the tension member and scraper discs for compressively engaging and yieldably maintaining the scraper discs at separate scraper positions along the tension member.

Abstract: An improved scraper blade for use in cleaning particulate conveyed material from a belt conveyor, the blade being mounted on a shaft which extends across the conveyor belt in spaced relation thereto. The scraper blade includes an elongated block of molded elastomer material, mounted on the shaft, which has a leading edge and a trailing edge extending across and in contact with the conveyor belt. The scraper blade surface intermediate its leading and trailing edges has a shallow concavity or pocket, spaced from the belt, in which a limited quantity of particulate conveyed material collects. The collected material itself scrapes the conveyor belt to assist in dislodging particulate matter from the belt.

Abstract: A pallet cleaning device used to clean pallets moved from a pallet magazine or supply hopper to the molding section of a concrete block molding machine includes a frame for mounting the pallet cleaning device directly in front of the pallet magazine of the block making machine. A first sub-frame is pivotally mounted on the main frame and is biased by gravity against a stop located on the main frame to establish the position of a set of four pallet scraper blades mounted side by side across the path of a pallet passing beneath the device. A blade holder is pivotally mounted on the sub-frame to locate the scraper blades at an angle; so that they contact the pallet on a line located behind the vertical projection of the pivot mounting of the blade holder on the sub-frame in the direction of travel of a pallet for cleaning. Resilient springs are used to bias the scraper blade holder against a stop engaging the sub-frame to locate the scraper blades.

Abstract: A conveyor belt scraper is used in combination with a conveyor belt and consists of a primary axle, at least one primary actuator arm attached to and extending from the primary axle, a secondary axle which is preferably concentric with the primary axle and is capable of rotational movement with respect thereto, at least one secondary actuator arm attached to the secondary axle and extending outwardly therefrom, a primary scraper extending from the primary axle which includes a primary blade for engaging a belt, a secondary scraper extending from the secondary axle and including a secondary scraper blade for engaging a belt, an air cylinder attached to and extending between the primary and secondary tension arms, and a mounting bracket for mounting the primary and secondary axles to a support.

Abstract: A cleaning device for cleaning a conveyor belt comprises a cleaning member mounted on a lever which can move angularly about a pivot axis extending transverse to the run of the belt, the lever also carrying a pressure member arranged to contact the face of the belt opposite to the face to be cleaned, the cleaning member being urged into contact with the surface of the belt by the reaction of the pressure member to movement of the belt causing angular movement of the lever about its pivot axis. The pressure member and cleaning member may be resiliently urged towards one another in the direction of the axis of the lever to enable wear of the cleaning member to be compensated automatically while reducing the angle through which the lever pivots during the useful life of the cleaning member.

Abstract: A conveyor belt cleaner mounted on a transverse support member including an arm extending from a mounting bracket and a belt cleaner blade secured on the arm. A positioning arrangement is provided between the arm and the cleaner blade to allow the blade to rotate about the central axis of the arm within predetermined limits in either direction so as to allow the scraping edge of the cleaner blade to align with the surface of the conveyor belt being cleaned. A nut and a resilient washer are provided to secure the blade against a collar. An alternative securement includes a pin-and-slot connection which allows the same rotative action of the blade relative to the arm and having multiple seals against the entrance of dirt into the connection.

Abstract: Reversable scraper blades engaging against one side of a belt run respond through a resilient connection to the movements of a roller engaging against another side of the belt run.

Abstract: A conveyor belt cleaning assembly (10) including at least one generally transversely extending cleaning member (20), engaging, in an operative position, a conveyor belt (14) surface to be cleaned. The cleaning member (20) is characterized in that over at least a short portion of its length, a lead-in surface is provided on its leading end (20A), such that it makes an acute angle with the belt. The belt cleaning member (20) is constructed of an abrasion resistant material and is flexible. In one embodiment, the flexible belt cleaning device (20) is resiliently biased in frictional engagement with the curved surface of the conveyor belt by a tension spring (30). In other embodiments, yieldable tension is developed by a counterweight (34) and alternatively, by a compression spring assembly (48).

Abstract: A scraper device for a belt conveyor has an elongate scraper blade for extending the width of the belt conveyor and carried by a support unit mounted on a supporting framework. The support unit includes an elongate bar engaged at each end in a ring rotatably supported in a slide block resiliently slidable in a U-bracket of the supporting framework. An axial shear pin traverses the slide block and ring to resist relative rotation therebetween until excessive torque is applied to the blade.

Abstract: A conveyor belt scraper blade, of synthetic plastics or hard rubber material and of elongate form bonded to an elongate metallic reinforcing and/or supporting strip extending parallel to the longitudinal axis of the blade, the latter having at least one longitudinally extending scraper edge, adapted, in use, to make contact with a conveyor belt surface to be scraped, and the blade having a lateral dimension such that said at least one scraper edge extends beyond an adjacent lateral periphery of the strip, the latter being apertured at at least two places along its length to provide a connection means for attaching the blade, in use, to a blade supporting arrangement.

Abstract: The cleated belt forage conveyor of the invention is directed to a forage belt conveyor in which the belt in service is protected against side discharge of conveyed forage by upstanding and intermittent central cleats and outwardly spaced side cleats. Sealing strips extend above the belt in the spaces between the respective central and side cleats to limit outward movement of the bulk of the forage and an edging extends on each side of the belt to prevent spillover. In the event of some side discharge from the belt to the inside of the lower reach of the belt, a plow overlying the inside of the lower reach of the belt directs the forage for discharge to vibrating deflector plates which deflect the forage to the bottom of the housing of the conveyor to be carried by the cleats to the input side of the conveyor and around the idler pulley for reconveyance.

Abstract: A conveyor belt cleaning device has a scraper blade element, preferably supported by a carrier, which is urged into contact with a surface to be scraped by a pressurized flexible-walled bag. The pressurization of the bag maintains the scraper blade in contact with the belt and ensures a uniform contact pressure over the entire length of the blade.

Abstract: The cleaning of conveyor belts has been a problem since their widespread acceptance and the adoption of belts for the transporting of materials. Many materials so conveyed have a tackiness and/or an affinity or attraction for the outer surface of a conveyor belt. When this attraction occurs, the cleaning or removal of this material from the surface of the belt is a problem. Many methods have been used for removing this material or residue adhering to the conveyor belt. In the present invention there is shown a vibration device which is attached so as to vibrate the lower belt extent. This apparatus is carried on the under and inner side of the conveyor belt so that a vibration occurs shortly after the discharge of the material from this belt.

Abstract: Muck and very wet material is removed from the surface of a moving conveyor belt by means of three scraper assemblies adjacent the head pulley of a conveyor belt installation. Each scraper assembly has a resilient, normally flat scraper blade with a tapered side, the opposite side being supported on an angle secured at each end to an operating lever which may be rotated by an air cylinder to engage the tapered side of the scraper blade with, and to flex the scraper blade against, the moving conveyor belt. The pressures in the air cylinders are adjusted so that the first scraper blade receives the greatest flexing force, and the second scraper blade a lesser flexing force, and the third scraper blade the least flexing force. This is done by supplying the air cylinders through progressively differently set pressure reducing valves connected to a common compressed air main.

Abstract: A conveyor belt cleaner comprising at least one scraper blade adapted to clean the surface of a conveyor belt as a result of its being urged towards said conveyor belt surface, the conveyor belt cleaner being characterized in that the scraper blade extends transversely with respect to the belt and is rotatable about an effective axis extending transversely with respect to the belt so that the scraper blade can assume either of two terminal positions in both of which the region of the belt moving towards the scraper blade makes an acute angle with the blade.