Abstract: The present invention provides a wiper assembly capable of minimizing the slant of a connecting rod interposed between wiper driving arms and a motor-driven arm by positioning the wiper driving arm to the substantially same height with the motor-driven arm. Further, the wiper assembly is capable of preventing water or other contaminants from entering a gap between a wiper arm shaft and a wiper driving arm by employing a cap covering the wiper driving arm and the wiper arm shaft, thereby effectively preventing wiper arm assembly malfunction that is caused by the entry of water or contaminants. The cap engages with the wiper arm shaft through a thread formed inside thereof.

Abstract: A wheel cleaning apparatus adapted to be secured to an axle hub centered in a wheel of a vehicle. The apparatus comprises a mounting bracket having a bearing for securing the wheel cleaning apparatus to the axle hub, an arm extending radially from the mounting bracket and a cleaning element attached to the end of the arm adjacent to and in contact with the wheel. The bearing allows gravity to act upon the wheel cleaning apparatus ensuring the arm is oriented in a constant substantially downward direction so that contact with the entire surface of the wheel is achieved as the vehicle is in motion.

Abstract: A paint flow control apparatus for insertion into paint cans, buckets, and other storage containers for regulating the application of paint to rollers and brushes dipped therein. The apparatus generally includes a porous grid member, a perimeter member fixedly attached to the grid member, a filter screen detachably attached to the grid member, and two handles fixedly attached to the perimeter member. The perimeter member maintains the porous grid member slightly submerged beneath the surface of the paint so as to prevent drying and flaking of the paint, and the perimeter member abuts/interacts with the walls of the storage container to maintain the position of the grid member. The filter screen strains the paint, and the handles allow convenient extraction/removal of the apparatus. A paint roller can be rolled across the top of the grid member to pick up an appropriate amount of paint.

Abstract: A suspension mechanism includes: a drive unit that includes the drive wheel, a drive source for rotating the drive wheel, and a transmission mechanism that transmits a driving force of the drive source to the drive wheel, being integrally provided with each other; a supporting member that supports the drive unit and is fixedly mounted on the cleaner main body; a biasing member that biases the drive unit towards a traveling surface of the self-propelled cleaner; a first and a second linking members that connects the drive unit to the supporting member at two different points, respectively.

Abstract: A hand held steam cleaner of relatively small pistol shape has a rearward projecting water container from which water is pumped by a pump within the main housing of the cleaner to a tank having a heater embedded in one wall thereof for the conversion of the water to steam. A one-way valve permits the entry of air into the container as water is pumped from it. A steam relief valve connected into a water line running from the pump to the tank opens when steam pressure becomes excessive, as when the steam cleaner nozzle is blocked. The tank in which water is converted into steam has two serpentine paths generally paralleling two sides of a U-shaped electrical heater in heat conducting relation to the paths. The path's topography is such that the surface area of the wall of the tank shared with the heater is greatly increased by a multiplicity of projections. A nose member of the cleaner receives the stem of various cleaning tools, locking them in place in fluid communication with the nozzle.

Abstract: A backpack mounted portable vacuum system is provided having a motor portion and a filter portion. The motor portion is cylindrically shaped and has a first vertical axis. The filter portion is also cylindrically shaped and has a second vertical axis that is horizontally offset from the first vertical axis. The horizontal offset provides for a larger debris container and debris fluid path.

Abstract: A multi-purpose tool powered by an attached power source is used as an air blower capable of delivering a high-velocity stream of air when the multi-purpose tool is in a blower mode of operation and as a rotating string trimmer capable of trimming vegetation when in a trimmer mode of operation. The tool includes a tubular shaft boom and an internal drive shaft configured to be rotated by the power source, and an impeller operatively connected to the internal drive shaft so as to be rotatable within the chamber and a trimmer head positioned below the impeller, the trimmer head operatively connected to the internal drive shaft so as to be selectively rotatable by the power source.

Abstract: A vacuum cleaner is provided having a cleaning head and a main body pivotally mounted to the cleaning head which includes a counter-balance mechanism having at least one torsion spring with a first end thereof mounted for pivotal movement about a fixed axis in either the cleaning head or the main body and a second end thereof mounted for pivotal movement about a fixed axis in the other of the cleaning head or the main body, with the at least one torsion spring having a main body portion which is free to move as the main body of the vacuum cleaner is pivoted relative to the cleaning head, the counter-balancing force of the at least one torsion spring increasing as the main body of the vacuum cleaner is pivoted from a generally vertical position to a generally horizontal position while the cleaning head remains generally horizontal.

Abstract: A vacuum cleaner height adjustment mechanism including a cleaning head having a pair of laterally spaced front wheels and a pair of laterally spaced rear wheels mounted for rotation within the cleaning head for supporting the cleaning head on a floor during vacuum cleaning operations, the front wheels being mounted to a common axle mounted in the cleaning head for pivotal movement around a fixed axis, the wheels being mounted to the axle offset from the pivotal axis of the axle, an arm extending from the axle, a shaft mounted substantially horizontally in the cleaning head for rotation about a central axis disposed in a plane perpendicular to a plane containing the axis of the axle, one end of the shaft having spiral threads thereon and an opposite end having an adjustment knob fixed thereto for manually rotating the shaft, and a guide member having internal threads matching and engaged with the spiral threads on the shaft for movement along the shaft, the guide member being coupled to the arm extending from

Abstract: A suction brush for a vacuum cleaner has a bottom plate rotatably disposed under a cover to contact with a cleaning surface. Even when the rear end of the suction brush separates apart from the cleaning surface during the cleaning operation, the bottom plate maintains the close contact with the cleaning surface by rotating downward, thus enhancing the cleaning efficiency.

Abstract: An omni-directional rolling support device includes a ball member; a cup member, a shaft having a first end and a second end, and a hollow supporting unit. The ball member is disposed in contact between the cup member inner surface and a planar surface. The ball member is in sliding contact with a cup member inner surface and non-sliding contact with the planar surface. The shaft first end is attached to the cup member and the cup member is rotationally fixed relative to the elongated member. The shaft second end can be attached to a supported object to provide rolling support across the planar surface in any direction. A hollow support unit attached to the shaft and surrounding the cup member can selectively advance and retreat along a central axis. The hollow support unit can extend to contact the planar surface and inhibit rolling across the planar surface.

Abstract: The invention concerns a handle, in particular for motor vehicle strip doors, of the type fixed in the rear frame (20) of the window of each door comprising a gripping part (1a) capable of being manually actuated through a groove (2), as well as means for transmission of the movement (6, 7, 9 to 13) from said gripping means (1a) to a lock so as to activate a bolt of said lock to open said door. The invention is characterized in that said transmission means (6, 7, 9 to 13) are arranged along a direction substantially parallel to the gripping part (1a), and mainly in the lower zone thereof, to optimize the longitudinal lower spade of said rear frame (20).

Abstract: The present invention provides as an object a novel hinge device which is extremely valuable as a commercial product and an electronic instrument using the hinge device.

Abstract: A hinge device for an electronic appliance for rotatably linking a first member and a second member, comprises a bearing section arranged on one of the first member and the second member, and a rotary shaft section arranged on the other of the first member and the second member. The rotary shaft section is rotatably engaged with the bearing section. The rotary shaft section is provided with a hollow section configured to arrange a functional member relating to a function of the electronic appliance to which the hinge device is applied.

Abstract: a metal hinge assembly for adjustably mounting a gate in a corresponding gate frame. The two nuts attached to the treaded rod on the upper portion of the hinge allow for the horizontal distance between the gate and the gate post adjustment The vertical distance is achieved by a chamber in the base of the hinge in which an alien key is received and torqued to change the distance between the gate and the gate post.

Abstract: This aims at providing a hinge device compact in size, and at securing a space sufficient for an FPC, etc. in manufacturing a cellular phone compact by use of the hinge device. The hinge device includes a shaft substantially long, a fixed cam provided allowing the shaft to rotate and having an angle holder, a movable cam provided to rotate about the shaft with rotation of the shaft and to slide along the shaft, and having an angle holder for holding at a predetermined angle an own rotation angle relative to the fixed cam cooperatively with the angle holder of the fixed cam, an elastic element always biasing the movable cam toward the fixed cam, a first arm fixed to the fixed cam, and a second arm fixed to the shaft. Here, the elastic element is to have a diameter provided as comparatively small correspondingly to the shaft substantially long.

Abstract: A handle of a hand-held working tool has a handle pipe made of a laminate with fiber-reinforced plastic material. The handle pipe is reinforced by a locally adjusted laminate structure at locations of high dynamic vibration-caused deformation energy, respectively. The laminate of the handle pipe has a base laminate and an additional laminate provided at the locations of high dynamic vibration-caused deformation energy. The additional laminate is applied to the exterior of the base laminate.

Abstract: A handle of a handheld working tool has a handle pipe reinforced by at least one reinforcement element locally arranged on the handle pipe at a location of high dynamic vibration-caused deformation energy. The handle pipe and the reinforcement element are made of plastic material. A laminate that is made of fiber-reinforced plastic material can be used for making the handle.

Abstract: A connector device includes a base coupled to a strap and having a chamber formed between two side panels and having a protuberance extended from one of the side panels, a pole straddled between the side panels, a frame rotatably secured to the base with an axle and engageable with and movable over the protuberance, and another strap having an intermediate segment engaged over the pole and engaged around the frame. The frame is engageable with the other strap, to force and to tighten the strap when the frame is rotated relative to the base and locked to the base at a locking position with the protuberance.

Abstract: A load binder for use in connection with a typical tie strap for securing a load for transport is provided. The load binder includes elements that are conformable to the shape of a particular load and which prevent the tie down from twisting upon itself. The load binder essentially comprises a body having and a handle pivotally attached to the body, a link pivotally attached to the handle, a first tie down engaging element attached to the link by a ball joint and a second tie down engaging element attached to the threaded shaft by a ball joint. The freely movable ball joints coupling the tie engaging elements to the binder allow the binder to conform to the shape of the load and also prevent the tie down from twisting upon itself. Additionally, a safety latch is incorporated into the binder which positively locks the handle in position relative to the body.

Abstract: At least one embodiment for an apparatus and methodology for reversibly attaching accessory(ies) to a least one article of clothing. The apparatus comprises of at least a magnetically attachment apparatus having at least primary and secondary magnets, which between which is generally reversibly sandwiched at least a portion of an article of clothing. The primary magnet is generally located on the rear of the article of clothing. The secondary magnet is generally located on the front of the article of clothing to reversibly retain at least one accessory, which essentially has at least some component or portion of a component containing ferrous and/or ferromagnetic material. In at least one embodiment, the accessory may be a golf ball marker. In at least one embodiment, the accessory may be jewelry.

Abstract: Described are methods for surface modification of an object (10) in order to increase the adhesive power of the object, wherein the surface (11) is subjected to structuring so that a multitude of projections (12) are formed, each comprising a foot part and a head part, wherein the head part comprises a front surface (13) which faces away from the surface, wherein each projection (12) is made in a size such that all front surfaces (13) project to the same vertical height above the surface (11), and form an adherent contact surface (14) which is interrupted by mutual spacing between the front surfaces (13).

Abstract: A grommet snap fastening device for fastening leather, fabrics, and sheet-like materials including a male component and a female component. Each of the male and female components include upper and lower elements. The upper and lower elements of each of the male and female components are secured to one another, with the leather, fabrics, or sheet-like materials located between the upper and lower elements of each component. A flexible annular compression ring having spring properties is located between the upper and lower female elements, and a groove is located upon the upper male element. The male component is detachably secured within the female component by engagement of the flexible compression ring with the groove.

Abstract: A modular drip tray for use in a casket includes a plurality of modules and an overlapping member. The plurality of modules are placed into a casket adjacent to each other and the overlapping member creates an overlap region that spans a portion of the two modules and any gap between the modules such that liquids impinging upon the overlap region will be impaired from progressing beneath the overlap region. The overlapping member may be formed integrally with one or more modules. Each module may further comprise a plurality of discrete isolated compartments for retention of liquids.

Abstract: A method and an apparatus for stuffer box crimping a multifilament yarn consisting of one or more fiber bundles, wherein a conveying fluid is introduced into a yarn channel via a plurality of fluid feed channels, with each channel carrying a partial flow. The yarn is pneumatically taken into the yarn channel, and guided, and possibly twisted in the yarn channel by the conveying fluid, and subsequently advanced into a stuffer box chamber. Inside the stuffer box chamber, the yarn is formed into a plug which is compressed and advanced, with the conveying fluid emerging from the stuffer box chamber through side openings. To influence the actions of the conveying fluid on the yarn within the yarn channel, at least one of the fluid feed channels is configured such that the partial flows of the conveying fluid are introduced from the fluid feed channels into the yarn channel under the action of different overpressures.

Abstract: A tool for removal of U-shaped brake spring or clip associated with a drum brake assembly, includes a foot, which will engage against one leg of the brake spring, and a side arm, which will engage against said leg of the clip or spring, and which will thereby upon pivotal motion of the tool, effect compression of the spring to permit removal thereof from a retention pin.

Abstract: A tool for removal of a fuel line from a vehicle fuel module by engagement of and displacement of a locking member, said tool including first and second arms with semi-cylindrical sections at each end that may be used in combination to engage the locking member.

Abstract: An apparatus for press-fitting a bearing cap into a cylinder block includes a frame. A first cylinder is connected to the frame. A guide rod is coupled to an operating rod of the first cylinder to ascend or descend in response to an operation of the first cylinder and configured to be inserted into bolt holes respectively formed in the bearing cap and the cylinder block in response to a descending thereof. A second cylinder is connected to the frame. A pressure detection sensor detects an operating pressure generated by the second cylinder. A press pad is coupled to an operating rod of the second cylinder to ascend or descend in response to an operation of the second cylinder and configured to press the bearing cap so that the bearing cap is press-fitted into the cylinder block.

Abstract: A method and apparatus for assembling a first thermoformed workpiece, such as a tab closure, to a second thermoformed workpiece, such as a lid.

Abstract: A method of forming a seal for a subterranean drilling tool employs irradiation. The seal is formed of a single homogeneous elastomeric material. The seal has an exterior surface with at least one portion that is in sliding engagement with part of a seal gland of the drilling tool. A property gradient is formed in the elastomeric material on at least this portion. The property gradient is formed by exposing the seal to an environment to define a property that changes from a first level to a second level without essentially changing the composition of the elastomeric material. The step of exposing is done by irradiating the seal with an electron beam.

Abstract: A tube connecting apparatus capable of stably and reliably connecting tubes in which liquid is contained and sealed is provided. A tube connecting apparatus 1 equips a first tube-holding assembly 2 and a second tube-holding assembly 3, each holding tube 8, 9 in which blood is contained and sealed in a parallel state. A first clamp 6 and a second clamp 7, each pressing the tubes to a flat state, is provided at the first tube-holding assembly 2 and the second tube-holding assembly 3. A tube-pushing member 10 which presses the tubes to a flat state is disposed movably to and integrally with the first clamp 6 at a side of the second clamp 7. The tube connecting apparatus 1 has a cutting mechanism 4, disposed between the first clamp 6 and the second clamp 7, for melting and cutting the tubes, and has a movement mechanism which moves the first tube-holding assembly 2 and the second tube-holding assembly 3 such that end portions to be connected contact closely each other.

Abstract: A method for producing a gasket insert comprising: providing a strip of insert material having a predetermined thickness; providing a pair of rigid parallel surfaces spaced apart by a distance approximately equal to, but greater than, the thickness of the insert material; placing the insert material between the surfaces; and bending the insert material to a desired shape. Also disclosed is a method for producing a gasket comprising: providing a strip of insert material having a predetermined thickness; providing a pair of rigid parallel surfaces spaced apart by a distance approximately equal to, but greater than, thickness of the insert material; placing the insert material between the surfaces; bending the insert material to a desired shape; and molding an elastomeric material to the insert.

Abstract: A metal container processing method includes steps of: a) stamping a metal sheet material into a blank container subject to the desired shape, b) removing sharp burrs and dents from the surface of the metal sheet material of the blank container with sodium nitrite solution, c) covering the surface of the metal sheet material of the blank container with a layer of surface coating of phosphorous compound, and d) covering said layer of surface coating with a layer of heat insulation coating containing Teflon and heat insulating material at the ratio of about 100:25˜35%.

Abstract: Implementations of the present invention include a thread-rolling tap, which is designed and intended for the non-cutting finishing of a previously created thread, in particular internal thread. For example, one implementation of such a tool includes at least one thread-forming portion that rotates about a tool axis, the thread-forming portion having multiple forming wedges. The forming wedges in cross-section include two flanks that diverge from one another beginning at a forming wedge tip. The forming wedge tip can be shaped as any of an acute angle, a rounded region, or a flattened region. At least one of the two flanks also include at least one expansion for positioning the forming wedge in the previously created thread. Additional implementations of the invention relate to a methods of manufacturing such a tool, as well as to methods of creating a thread.

Abstract: A section (10; 110) is provided for the manufacture of hollow body elements, in particular for the manufacture of pierce and rivet nuts having a square or rectangular outline in plan view and a ring-like piercing section (36; 236) at a side confronting a component consisting of a sheet metal material or the like. The section (10; 210) is at least substantially rectangular in cross-section with two bars (14, 16; 214, 216) at the side (12; 212) later confronting the component. The bars are spaced apart and extend parallel to the longitudinal sides (18, 20; 218, 220) of the section, are likewise at least substantially rectangular in cross-section and form, in the finished element (11, 211), a feature providing security against rotation. The bars respectively each have an inclined flank (68, 70; 268, 270) at the inner side which forms an undercut (69, 71; 269, 271).

Abstract: A manufacturing method includes a step of setting prescribed dimensions L and p, a wire feeding step of feeding a wire on a turning base surface by the dimension L, a turning step of turning the wire on the turning base surface to thereby form a first turning portion, a straight first portion, a second turning portion and a straight second portion, and a pushing step of pushing the straight first portion or the straight second portion so that it goes away from the turning base surface by the dimension p. A manufacturing apparatus that executes the above steps is also disclosed.

Abstract: A fixing tool for quickly setting up a least a secure device is used for mounting the secure device, which is provided with an engaging member and a secure unit, to an electronic unit. The fixing tool includes a main member, a driving member with an extending part pivotally connected to the main member and an ejection member with an ejecting part disposed at the bottom cover of the main member. The bottom cover defines a moving direction and a rotating direction and the driving member can rotate between a prior-trigger position and a trigger position along the rotating direction and the ejection member can move between a prior-ejecting position and an ejecting position. When the driving member is disposed at the prior-trigger position, the ejection member is at the prior-ejecting position.

Abstract: An apparatus for demounting and mounting for an integrated circuit, includes a base having a arm, a platform disposed on the base, a tooling head disposed on the arm, and a positioning device disposed on the base. The platform and the positioning device horizontally move together and a linking portion of a combination of a integrated circuit, and display, disposed on the platform and the positioning device, is moved under the tooling head and then pressed by the tooling head when the tooling head descends to press the linking portion. And both of the platform and the positioning device move back so that the tooling head scrapes the integrated circuit from the display.

Abstract: A component placing head provided with spline shafts, which are each elevatably supported by two spline nuts, is provided with a cylindrical member that is fixed to the outer peripheral portions of the spline nuts and joins the spline nuts to each other to put the same into an integrated state. Further, the cylindrical member is rotatably supported on a head frame via two bearing sections, reducing the amount of the bearing sections to be provided. With this arrangement, high-accuracy component placement and downsizing of the component placing head can be achieved.

Abstract: An apparatus for installing a spacer of a field-emission display is provided with a suction mechanism for sucking the spacer. The suction mechanism has a suction terminal, which an opening to apply suction force on top of the spacer and a positioning part located on top of the suction terminal for positioning the spacer sucked by the suction terminal. The suction terminal includes a pipe having a diameter smaller than that of the spacer. The positioning part is configured according to a configuration of the spacer. The opening has a uniform cross section from a bottom edge to a top surface thereof or a cross section gradually decreasing from a bottom edge to a top surface thereof.

Abstract: A process for producing a tape-like material uniformly containing highly pure single-walled or multi-walled carbon nanotubes with a high density highly pure single-walled or multi-walled carbon nanotubes; a high-performance field emission electrode including the tape-like material; and a process for producing the field emission electrode. For synthesis of carbon nanotubes by arc discharge, an inert gas or inert gas-containing mixed gas is jetted onto a cathode (2) comprising a carbon material from the inside (11a) of a hollow electrode (11) used as an anode, and simultaneously an arc is generated to form a path of arc discharge along the stream of the gas. Consequently, the cathode spot is prevented from irregularly moving, and thus highly pure carbon nanotubes can be produced. At the same time, by relatively moving both electrodes so as to move the cathode spot of the arc (3) on cathode, the synthesized carbon nanotubes are formed into a tape.

Abstract: The present invention discloses a modular method for manufacturing circuit boards, which is a method of manufacturing multilayer printed circuit boards with blind and buried vias structure by using basic components as the assembly units. The method comprises the steps of producing electric circuits on the surface of a copper clad laminate by photolithographic and etching methods, pressing a dry film dielectric onto the surface of the laminate by the dry film lamination method after the electric circuit layer is formed, drilling a via and plugging a plastic conductive material into the via to obtain a basic component.

Abstract: A method of forming a printed circuit card with a metal power plane layer between two photoimageable dielectric layers is provided. Photoformed metal filled vias and plated through holes are in the photopatternable material, and signal circuitry is on the surfaces of each of the dielectric materials connected to the vias and plated through holes. A border may be around the card including a metal layer terminating in from the edge of one of the dielectric layers. Copper foil with clearance holes is provided. First and second layers of photoimageable curable dielectric material are on opposite sides of the copper. Patterns are developed on the first and second layers of the photoimageable material to reveal the metal layer through vias. Through holes are developed where holes were patterned in both dielectric layers. The surfaces of the photoimageable material, vias and through holes are metallized by copper plating, preferably using photoresist.

Abstract: A manufacturing method of a multi-layer circuit board with an embedded passive component includes: providing a conductive layer which has a first surface and a second surface; forming a metal paste on the first surface to form metal joints; using a sintering process to connect a passive element to the corresponding metal joints; stacking a core substrate and an organic isolated layer on the first surface of the conductive layer; and forming electrical pattern connecting to the passive element on the second surface of the conductive layer.

Abstract: A method and an assembly system for manufacturing an assembled camshaft having a metallic shaft and at least one shrunk-on cam, includes initially heating the at least one cam, threading the at least one cam onto the shaft in a predetermined position in the heated state, and subsequently shrinking the at least one cam onto the shaft due to a cooling down. The shaft is cooled down prior to thread-on of the cams so that the cams are shrunk onto the shaft due to a temperature equalization which includes heating of the shaft and cooling down of the cams. The assembly system includes multiple drums in which the shafts and the cams to be fitted are accommodated and cooled and/or heated. The shafts are cooled preferably with the aid of a cooling lance inserted into a hollow space of the shaft.

Abstract: The invention concerns a geometrical construction process for a flash land, to be provided in a die for the forging of a turbomachine vane, in accordance with determined parameters (l, d, ?, ?, h), where the vane has a blade and the blade is defined by plane sections (Si) in predetermined planes (Pi), where the flash land and its flash gutter must be defined in the said predetermined planes so as to obtain plane sections of the blade and of the flash land.

Abstract: A method of forming a jacketed steam distribution tube assembly includes simultaneously extruding an inner tube, an outer tube, and a plurality of connecting members for connecting the inner tube to the outer tube, thereby forming a jacketed steam distribution tube assembly.

Abstract: The invention relates to a method and an injector for determining a position of a second part (10) inside a stepped boring (6). This part should assume an exact distance (H) from a first part (2). In order to determine the distance (H) between both parts (2, 10), a collar (3) is firstly introduced into a second boring (6b) of the stepped boring (6) until it rests upon a step (16) of the stepped boring (6). Afterwards, a punch (4), together with a touch probe (5), which is located inside a longitudinal boring (d), is placed upon a lower annular surface (17) of the collar (3) or on an underside (17a) of the first part (2), and the collar (3) is compressed until the predetermined distance (H) is obtained. The distance (H) is measured to a reference measure (x) between a projecting end piece (E) of the touch probe (5) and a reference mark (B) outside of the punch (4). The stamping process is stopped once the reference measure (x) has been obtained.

Abstract: A process for integrating a ball valve in a pump body, comprising the following stages: the pump body is moulded by arranging radial ribs on its internal surface, in the proximity of the valve seat, each of which has an end portion which can be bent towards the inside of the body, a ball is inserted inside the space enclosed by the ribs, the said end portions are bent with the help of a tool in order to imprison the ball. Application on pumps fitted with ball valves.

Abstract: A process of manufacturing a wheel hub comprises coating a blank made of aluminum alloy on a surface of the blank, removing a portion of the blank for exposing the aluminum alloy of the blank to be electroplated, polishing the exposed portion of the blank, removing wax and oil stains from the surface of the blank, sequentially electroplating nickel and copper on the exposed portion of the blank, polishing the copper layer on the exposed portion of the blank, removing wax and oil stains from the surface of the blank, sequentially electroplating a plurality of nickel layers having different concentrations of sulfur on the copper layer, and electroplating chrome on the nickel layers for producing the wheel hub.