Abstract: A system for preparing a surface for painting, staining, or other treatment is provided. This system includes a surface preparation material and an optional dispenser for dispensing the surface preparation material. The surface preparation material includes a single-layer or multi-layer substrate material or fabric; a sanding portion formed on the substrate, wherein the sanding portion further includes at least one abrasive substance deposited thereon or embedded therein; and a wiping portion formed on the substrate separate from the sanding portion, wherein the wiping portion further includes cleaning means for removing debris created by the sanding portion from the surface to be painted, stained, or otherwise treated. The cleaning means may be one or more dry textured regions or areas formed on the substrate or it may be one or more sticky or tacky regions or areas formed on the substrate.

Abstract: A dust collection device for a sanding machine includes a casing located at the lower end of the upright sanding belt and the casing includes a bottom hole which communicates with the open top of the dust collection part. The dust collection part communicates with an exterior collection area defined within an outer cover. A fan unit an a separation plate are located within the outer cover, so that dust during operation of the sanding belt can be collected into the exterior collection area and brought out via an escape pipe connected to the outer cover. A sanding wheel is located beside the separation plate and a housing is mounted to the sanding wheel. The housing includes a restriction plate so as to guide dust during operation of the sanding wheel into the escape pipe. The sanding belt, the fan unit and the sanding wheel share a common axle.

Abstract: A volume-adjustable device for the delivery of multiple medications to a subject, the device comprising multiple medication elements; an outer containment means having at least one open end into which the medication elements are removeably inserted; and a closure means removeably and adjustably inserted into at least one end of the outer containment means is disclosed.

Abstract: An improved grinder/polisher includes a base having a bowl, a rotating drive plate and a drive plate drive that is adapted to support a platen. The grinder/polisher includes a head configured to support a specimen holder. The head has a first drive for rotational drive of the specimen holder and a second drive for moving the specimen holder toward and away from the drive plate. The head includes a load cell operably connected to the first drive and a counter operably connected to the second drive. The counter is configured to determine movement and the extent of movement of the head toward and away from the drive plate. The grinder/polisher includes a control panel mounted within a housing and including a microprocessor controlled control system having a touch panel or screen.

Abstract: A dust box includes: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle. The dust-collecting portion mainly consists of a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a paper bag received in the box and configured to store the dust particles to be discharged from the nozzle.

Abstract: A tool for shaping a material which, in use, generates dust. The tool (e.g., sander) has an outlet for discharging air and dust, a dust recovery chamber which is sealed during operation and at least one cyclone. The cyclone has an inlet port which is coupled to the outlet, an outlet port which communicates with the dust recovery chamber and an air vent from which cleaned air is expelled.

Abstract: The invention relates to a dust collection container for a hand-held power tool, especially an electric sander, having a dust extraction connection (12). Said dust collection container has an inlet connection (17) configured to be slid onto the dust extraction connection (12) and a seal (18) that is effective between the inlet connection (17) and the dust extraction connection (12), the peripheral surface (182) of said seal sealingly fitting against the inner wall (172) of the inlet connection (17). In order to facilitate an easy and jerk-free handling of the dust collection box during attachment to the hand-held power tool and during detachment of the hand-held power tool, the seal (18) has a sealing surface (181) which is oriented at a right angle to the connection axis and which is configured to sealingly fit against the free, annular face (121) of the dust extraction connection (12).

Abstract: A grinding machine with a length-adjustable dust collecting structure includes a dust collecting structure, and the dust collecting structure includes a dust collecting pipe and a moving element, and the moving element is installed at a front end of the dust collecting pipe for collecting dusts produced after a grinding process, and the moving element can be pushed or retracted from the front end of the dust collecting pipe, such that the displacement of the moving element at the front end of the dust collecting pipe allows the dust collecting pipe to effectively suck the dusts produced during the grinding process.

Abstract: A universal dust shroud includes mounting brackets held above the shroud body by springs. The brackets move radially and vertically relative to the body to accommodate different angle grinders, and allow vertical movement of the shroud body relative to the grinding disk while using the grinder to allow the user greater control over the angle grinder.

Abstract: A dust-collecting receptacle for an electric hand machine tool, in particular an electric hand grinder, having a dust-collecting chamber (17), an inlet fitting (21), an exhaust opening (18), and a dust filter (20) situated between the dust-collecting chamber (17) and the exhaust opening (18). To achieve a compact design of the dust-collecting receptacle (14) that on the one hand, does not impair operation of the electric hand grinder or only does so to an insignificant degree and on the other hand, has a high dust-collecting efficiency, the inlet fitting (21), the dust-collecting chamber (17), the dust filter (20), and the exhaust opening (18) are situated one above another and preferably, the form of the dust-collecting receptacle (14) is adapted to the outer contour of the electric hand machine tool (FIG. 1).

Abstract: There is also provided a dust extraction module for use with a power tool, the dust extraction module having: a dust collection chamber (50) having an inlet (52) connectable in fluid communication with an outlet (44) of a dust-extracting duct (40) of the power tool, and having an outlet (54) in fluid communication with atmospheric air; and a filter (60) locatable in fluid flow between the outlet of the dust collection chamber and the atmospheric air; wherein the dust collection chamber (50) has a substantially circular cross section, the inlet (52) to the dust collection chamber is at the perimeter of the circle and the outlet (54) of the dust collection chamber is from the middle of the circle.

Abstract: A cutter grinding device has a housing, a motor, a grinding wheel, a holding cap, multiple cutter holding brackets and a cutter clamping assembly. The holding cap is mounted on the housing, encloses the grinding wheel and has multiple holes formed on corresponding axis coinciding with different portions of the grinding wheel. The brackets are mounted respectively in the inserting holes in the holding cap and each has a working hole aligning with the corresponding hole in the holding cap and at least one pair of holding blocks. The holding blocks on the holding brackets have different heights to hold fins of a milling cutter at different positions and angles when inserted into the brackets. Accordingly, the milling cutter can be ground at different angles with the cutter grinding device conveniently and easily.

Abstract: An improved dust collector for a power tool is employed. The dust collector includes a body portion, a neck portion and a head portion, wherein the body portion is disposable on the power tool so that during the cutting operation the body portion will receive and direct the air, dust, and debris to the head portion via the neck portion to either be exhausted out or to be collected in a dust collection volume. Preferably, the body portion has a series of openings to allow the user to view the cutting wheel during the cutting operation. The body portion may also have an internal directional member for efficiently directing the flow of air, dust, and debris. The head portion is preferably rotatably connected to the neck portion to allow the user to rotate the head portion to a desired position.

Abstract: A riding floor sander for large hardwood floor surfaces, such as gymnasiums and dance floors, has a powered cart with one or more sanding machines connected to it. A blower picks up the process waste in a stream of air and and moves it to a cyclone separator that is mounted on the riding sanding machine. There the dust is separated from the air stream, leaving clean air to be returned to the ambient. The dust that falls from the cyclone into a dust collection drum or bag on the cart. There can be are primary cyclonic separators on the sanding machines, and a cyclonic separator on the back of the riding cart. Alternatively, the cyclone and drum may be located remote from the riding sander, and can have an in-line auxiliary pump or impeller.

Abstract: The present invention generally comprises a method and an apparatus for recycling electrochemical mechanical polishing (ECMP) fluid. A selected portion of used ECMP fluid may be delivered to a recycling unit where the fluid may be refurbished. The concentration of the components that are present in the selected portion of used ECMP fluid may be measured. Based upon the measurements, individual components of the ECMP fluid may be selectively dosed into the selected portion in an amount sufficient to ensure that the selected portion of used ECMP fluid, once refurbished, contains the appropriate concentration of components. Alternatively, a predetermined amount of virgin ECMP fluid may be added to the selected portion. The refurbished ECMP fluid may be recycled into an ECMP system for use in another ECMP process.

Abstract: A machining system having a machining envelope, a housing, a hopper, and a seal. The housing defines at least a portion of the machining envelope. The hopper has a top surface defining an opening. The seal is disposed between the housing and the top surface. The hopper is configured to receive particulates when positioned below the machining envelope.

Abstract: An electric hand-held power tool is disclosed that includes a machine housing (11) that has at least one dust-ejection opening (12), and a dust-collection container (13) attached to dust-ejection opening (12), the dust-collection container (13) including a dust-collection box (15) and a cover (16) that closes the dust-collection box (15). To reduce manufacturing costs and provide simple handling of the electric hand-held power tool, dust-collection box (15) of dust-collection container (13) is integrally joined with machine housing (11).

Abstract: A dust collection device for a hand-held sanding block is disclosed. The dust collection device has an outer shell. The device also has a series of ribs and blocks to hold the sanding block in place along with a seal and baffles to contain the dust generated during the sanding process.

Abstract: An auxiliary dust collection system can be interposed between a sander or other dust producing tool and a vacuum source, e.g., shop vacuum. This auxiliary system has a cyclonic separator connected by a flexible hose to the tool and by another hose to the vacuum source. The cone of the separator is mounted onto the lid of a drum into which the dust precipitates. For a tool that has its own blower, the vacuum source can be omitted, and the air leaving the outlet duct of the separator can be filtered and returned to the ambient. A drop in silencer formed of a sleeve or tube of acoustic foam can be positioned into the inlet side of a filter cartridge following a cyclonic separator. The silencer absorbs a significant fraction of the process noise.

Abstract: An orbital sander is provided having a number of novel features including a high speed permanent magnet DC motor having a relatively flat rpm versus torque curve. The sander includes an AC to DC power supply, a remotely located on/off switch operated by a switch actuator bar extending transversely through the housing enabling the operator to actuate the on/off switch by alternatively pushing opposed ends of the actuator bar. The orbital sander further includes a fan having non-uniformly spaced blades, eliminating the need for a conventional counterweight, and a dust outlet adapted to be alternatively connected to a dust canister or alternate size collector vacuum hoses.

Abstract: Methods and apparatus for chemical mechanical polishing are described. In one embodiment, an apparatus includes a table top and a transfer station and multiple polishing stations are mounted on the table top. The apparatus further includes multiple washing stations, where each washing station is located between either two polishing stations or between a polishing station and a transfer station. Multiple carrier heads are supported by a support member that is rotatable about an axis. The transfer station and the multiple polishing stations are arranged at approximately equal angular intervals about the axis.

Abstract: A cutting machine includes a bottom collecting tray, a cutting blade overhanging on a cutting table and having a cutting area defined at an outer circumferential portion thereof when the cutting blade cuts the work piece, and an environment control arrangement. The environment control arrangement includes an end collecting tray, which is upwardly extended from the bottom collecting tray, having a collecting chamber for collecting residual particles of the work piece while the cutting blade cuts the work piece, wherein the end collecting tray must be upwardly extended to a position above the cutting area of the cutting blade, and a suction source having a sucking inlet provided at a lower portion of the end collecting tray for collecting the residual particles within the collecting chamber by means of sucking effect.

Abstract: A drill sharpener is provided which has a point-splitting port which simplifies the procedure for producing a split point on a drill bit undergoing sharpening. The point-splitting port is positioned relative to a grinding wheel assembly such that, when the drill held by a chuck is advanced toward the grinding wheel, a flute of the drill at the drill tip is brought into contact with the grinding wheel. The port has alignment stops therein which mate with flats provided on the barrel of the chuck to ensure proper alignment of the chuck and drill relative to the grinding wheel. The stops also limit the extent of inward travel of the chuck and drill to a predetermined distance. A debris or grit collection tube is also provided to be inserted into an unused port of the drill sharpener, to contain and confine any debris or grit attempting to exit the sharpener through the unused port.

Abstract: The present invention refers to a motorized tool with suction and dust collection capacity. The tool comprises: means for extracting dust suitable for producing a flow of air; means for collecting dust having a first duct for the entrance of the air, that can be connected separately to said tool, and at least one second duct for the air, connected to the outside environment; said means for collecting dust include a filtering element positioned between said first duct and said second duct. Said filtering element defines an internal space and an external space surrounding said internal space, one of which is in communication with said first duct and the other is in communication with said second duct.

Abstract: Drywall sanding apparatus employing a spring tensioned frame surround about its sanding component to capture substantially all generated dust within a collecting bag secured with said frame, to be thereafter emptied.

Abstract: Disclosed is a cylindrical grinding machine of the type that a workpiece support device composed of a work head and a foot stock is mounted on a forward upper portion of a bed while a wheel head unit composed of a slide base and a wheel head is mounted on a rear upper portion of the bed. A coolant collecting vent which takes a rectangular shape as viewed from above vertically extends in the bed and opens to the upper surface of the bed to cover an area that extends from under the workpiece on the workpiece support device to under the forward portion of the wheel head unit. A horizontal vent is provided in the bed to open to the rear surface of the bed and to communicate with the collecting vent. A coolant supply device is inserted at a part thereof into the horizontal vent from the rear surface of the bed to extend an inlet opening into the collecting vent.

Abstract: A liquid jet machining apparatus including holding means for holding a workpiece, liquid jet application means for applying a liquid jet to the workpiece held by the holding means, and catching means for catching the liquid jet which has penetrated the workpiece. The catching means includes a tank for accommodating a liquid. At the bottom of the tank, a cushioning member is replaceably disposed, and an abrasive is accumulated. The liquid jet having penetrated the workpiece acts on the liquid accommodated in the tank, and then acts on the cushioning member and the abrasive. Wave suppressing means for suppressing generation of waves due to the liquid jet acting on the liquid accommodated within the tank is disposed in an upper portion of the tank.

Abstract: A concrete engraver apparatus including a carrier for use with a hand-held engraver. The hand-held engraver is detachably mounted to the carrier. The carrier has wheels and a handle attached to an enclosure. The enclosure includes a vacuum mount for attaching a vacuum tube to evacuate loosened particles from the enclosure during operation of the hand-held engraver.

Abstract: An eyeglass lens processing apparatus for processing an eyeglass lens includes: a processing chamber inside which a lens grinding tool is disposed; a tank which stores grinding water; a drain hose connecting the processing chamber with the tank; a filter for eliminating bubbles attached to an outlet of the drain hose, which includes a large number of pores having a size such that permits passing of processing debris stemming from rough processing and inhibits passing of bubbles larger than the processing debris.

Abstract: A sanding tool 10 includes a block 11 mounting an abrasive member 50, and a shroud 12 which extends around the block and includes a channel 20 which is configured to receive abraded dust. The abrasive member is configured to project beyond an outer edge regions 16 of the shroud 12. The shroud further includes an outlet 21 which is connected to a source of suction, and at least one inlet 22 which is formed as an interruption in the edge regions 16 of the shroud 12. In use, when the sander is located on a planar surface, and suction is applied to the outlet, air is able to be drawn into the channel over the edge region of the peripheral wall and the inlet is configured to introduce a draft through said channel to facilitate clearing of abraded dust from the channel to the outlet.

Abstract: A dust abatement vacuum hood, provided for a flush-cutting concrete saw, includes a rigid shell that is preferably either vacuum formed or injection molded from a tough polymeric material that may be reinforced with structural fibers. Alternatively, the vacuum hood may be stamped or cast from a durable metal. The vacuum hood is equipped with a vacuum port to which one end of a vacuum hose may be attached. The opposite end of the vacuum hose is attached to a vacuum cleaner system. The vacuum hood has a spring-mounted attachment bracket that can be bolted directly to the concrete saw. As the blade of the concrete saw rotates, pulverized concrete is discharged into a chamber opening of the vacuum hood. Internally, the vacuum hood is shaped so that the pulverized concrete is directed toward the vacuum port, from where it is directed to the vacuum cleaner system.

Abstract: The invention is based on a guard device (33) for a power tool, in particular for a sanding power tool, having a protective cover (40) that is provided to at least partially encompass a disk-shaped, rotating tool, and having a dust removal tube (52), the longitudinal axis of which is located at an angle of up to 80° to the axis of rotation of the tool. It is proposed that part of the dust removal tube (52) passes through the plane of a flat side of the tool.

Abstract: The dust removal device comprises a fan (18), a dust collection receptacle (24), and a suction passage (28). The dust collection receptacle (24) equipped with a dust filter (26) is located in the path of air flow (34, 36) between the suction passage (28) and the fan (18). The dust is therefore filtered out of the air stream before it reaches the fan, which prevents dust-induced wear. It is also possible to use the same fan for engine cooling as well as dust removal.

Abstract: A dust and chip removal device for sanding hand power tools has a storage container securable to a hand power tool, a transport channel via which dust and chips are directed into the storage container, a retaining element preventing the dust and chips from flowing back out of the storage container, the retaining element having at least one passage, an elastic element which has a holding force closing the at least one passage, the passage being openable automatically against the holding force at starting at a certain delivery pressure, while the elastic element automatically closes the passage below a certain delivery pressure, and a channel having cross-sectional area which tapers toward the passage.

Abstract: A dust collection system for use in connection with a portable power tool is provided. The dust collection system generally includes a dust collection port having an intake that is interconnected to an air impeller by an intake duct. The impeller is driven by a motor, to create a vacuum at the intake port of the dust collection port. The outlet of the air impeller is in communication with a dust collection volume. In operation, the dust collection system is fixed to a portable power tool. Dust created during sawing or other operations is collected by the dust collection port, and is drawn away from the location at which the dust is created by a vacuum established by the air impeller at the intake port. The dust thus collected is deposited in the dust collection volume, which may include a filter bag.

Abstract: A work table includes a workpiece-supporting box having a bottom plate formed with an outlet port connected to a suctioning device, and a peripheral wall. Left and right guide plates extend inclinedly and downwardly from the peripheral wall toward the outlet port, and have opposing end walls distal from the peripheral wall. A distributor member is disposed between the end walls, and cooperates with the bottom plate to define a lower chamber in fluid communication with the outlet port, and further cooperates with the guide plates and the peripheral wall to define an upper chamber. A working panel is mounted on the peripheral wall, and is formed with apertures for access to the upper chamber.

Abstract: A lapping machine operable with a lap wheel for lapping gold jewelry and adapted to collect gold dust produced by the lapping machine, includes: (a) a base, (b) an electric motor mounted to the base, the electric motor having a rotatable output shaft extending upward and adapted to be coupled to the lap wheel which is situated above the electric motor and rotates about the axis of the output shaft, with a gold dust debris space defined as the area surrounding the lap wheel and extending from below the lap wheel downward and surrounding at least part of the output shaft, (c) a shroud comprising rear and opposite side parts that surround the rear and opposite sides of the gold dust debris space respectively, thus leaving the front of the gold dust debris space open and accessible, the shroud including a continuous front wall and a continuous rear wall spaced radially outward of the front wall, with air flow passages defined between the front and rear walls of the rear and side parts, the front walls of the side

Abstract: A non-rotary, linear reciprocating floor sander includes a housing having a bottom opening, wherein a rotating electric motor is supported by the housing. A vertical output shaft extends within the housing and engages gears controlling a pair of flat platens enclosed above and on sides by the housing. The platens have lower surfaces with bonded sandpaper pads adapted to be in contact with a floor to be sanded. The vertical output shaft controls reciprocating movement of the platens linearly in a plane in opposite directions, so that the platens move toward and away from each other, thereby reducing little induced force or vibration transmitted to the housing.

Abstract: An air-guiding structure for an air sander includes a muffler assembly integrally formed from plastic material, a main passageway and a sub-passageway formed in the muffler assembly, a dust collection port formed at a bottom end of the sub-passageway, and a baffle integrally formed within the main passageway to divide the main passageway into a front section and a rear section. One side of the main passageway communicates with the sub-passageway, and the main passageway has a joint port and an exhaust port opposite to the joint port. The joint port and the dust collection port of the muffler assembly connect to the outlet port and joint port of the air sander, respectively. The baffle is formed with a predetermined number of thin holes to communicate the front section with the rear section, wherein the rear section of the main passageway communicates with the sub-passageway.

Abstract: The present invention is a splash shield housing for encompassing wet saws having a trough positioned along the interior of the housing for containing the overspray. The housing can be extended to encompass three sides of a wet saw with the extension maintaining the integrity of the housing. Positioned above the trough on the back side is a splash guard comprised of an extendable retractable impermeable sheet having means for extending and attaching the sheet to the back table lip to prevent any overspray coming back between the table and rear wall trough.

Abstract: A vertical band saw machine includes an endless band saw trained on a lower blade mounting pulley which is driven by an output shaft of a motor for sawing a workpiece placed on a worktable. A sawdust collecting member is mounted on a lower support below the worktable, and has first and second sawdust passageways with first and second intake ports disposed above and under the worktable in the vicinity of the blade. An impeller is rotatable coaxially with the lower blade mounting pulley so as to draw sawdust from the sawdust collecting member into a blower casing for discharge through a discharge port.

Abstract: An orbital sander is provided having a number of novel features including a high speed permanent magnet DC motor having a relatively flat rpm versus torque curve. The sander includes an AC to DC power supply, a remotely located on/off switch operated by a switch actuator bar extending transversely through the housing enabling the operator to actuate the on/off switch by alternatively pushing opposed ends of the actuator bar. The orbital sander further includes a fan having non-uniformly spaced blades, eliminating the need for a conventional counterweight, and a dust outlet adapted to be alternatively connected to a dust canister or alternate size collector vacuum hoses.

Abstract: A rotary sanding machine includes a driven wheel coupled to a transmission shaft which is driven by a motor so as to actuate an emery coated belt for sanding. A barrier wall is disposed to hold back dust flying during sanding action to permit the dust to fall into a dust passageway in a dust collecting member. An impeller is mounted in a blower casing, and is coupled to an impeller driving shaft which is rotated with the transmission shaft by means of an endless drive transmission member such that the dust falling in the dust passageway can be drawn into the blower casing for discharge through a discharge port.

Abstract: A rotary woodworking machine includes first, second and third rotary woodworking members, and a dust collecting mechanism. The dust collecting mechanism includes first, second, and third dust collecting units for collecting wood dust generated during a woodworking operation of the first, second and third rotary woodworking members, respectively, a dust accommodating unit for receiving the wood dust from the first, second and third dust collecting units, and a blower mechanism which is connected to and which is in fluid communication with the dust accommodating unit and which is operable so as to draw the wood dust in the dust accommodating unit out of the rotary woodworking machine.

Abstract: A dust director portable vacuum guard for mounting onto a bore of a portable angle grinder. The dust director includes a housing with parallel inner and outer walls and an end web adjacent to a straight barrel that is secured along aligned edges of the walls. The barrel is slotted from a forward dust collected end to the web and is stepped at a selected distance apart from the inner wall upper edge, functioning as a baffle. An attachment ring is pivotally mounted in the housing inner wall to releasably couple to an angle grinder bore and pivot around that bore upon release of a spring loaded thumb screw. An extension cover is included on an end of the housing to allow for sawing through a corner.

Abstract: A substrate cleaning apparatus is provided which comprises a box in which a substrate is cleaned with a cleaning liquid, and an exhaust system for exhausting the box, wherein the box is provided in its upper wall with an air intake opening and the exhaust system is fluidly connected to the box at a lower wall of the box so that air is introduced into the box through the air intake opening, flows down in the box passing around the substrate and finally exits the box through the exhaust system. A door is provided to close the air intake opening when an inside air pressure in the box becomes greater than an outside air pressure outside the box.

Abstract: A wood machining apparatus includes a sawdust collector having a supporting wall that supports a base of a cutter carriage thereon, two upright walls extending downward from the supporting wall to define a bin-receiving space therebetween, a mounting rod extending between bottom ends of the upright walls, and a sawdust collecting bin pivoted to the mounting rod in such a manner that the bin is turnable about the mounting rod between a sawdust collecting position, in which, a top opening of the bin is confined in the bin-receiving space to receive sawdust discharged from the cutter carriage, and a sawdust removing position, in which, the top opening is exposed outwardly of the bin-receiving space to facilitate removal of the sawdust from the bin.

Abstract: An enclosed wet saw table for containing debris distributed by a wet type table saw. The enclosed wet saw table includes a table apparatus with a sink section for placing a wet saw on. There are walls on three sides of the sink for containing any splashing of liquid and debris during the cutting process. The liquid and debris drains through into a container having a pump member for filtering and re-circulating the liquid back up to the wet saw. All of the sections of the table apparatus are selectively couplable allowing the user to transport the unit and set it up on site in short order.

Abstract: The present invention provides a polishing slurry reclamation system. In one embodiment, the polishing slurry reclamation system comprises a polishing apparatus having a polishing platen and a fluid delivery system positioned to deliver a slurry or a rinse to the polishing platen, a recovery drain adjacent the polishing platen, and a fluid diverter associated with the platen and configured to deflect a selected one of a slurry or rinse emanating from the polishing platen to the recovery drain.

Abstract: A power tool (10) having a dust suction device (19) integrated into its housing (12) and having an ejection fitting (20) which is connected to the dust suction device (19) and can be detachably fastened with its injection fitting (22) to a dustproof dust box (21) is particularly suitable for containing sanding dust because of a number of side walls (34) of the dust box (21) have air openings (40) and on the inside, support at least one filter element (48), in particular a folded filter, which overlaps the air openings (40).