Abstract: A machine for slotting hexagonal heads of bolts at right angles to oppositely located edges of the heads. The machine includes a rotatable driven conveying wheel having radially arranged grooves for receiving the shafts of bolts therewith; an alignment device, for aligning the edges of the bolt heads in a predetermined position relative to the conveying plane; a clamping device, for clamping the shafts of the bolts relative to the grooves of the conveying wheel over a predetermined conveying or clamping region of the bolts; a cutting device arranged relative to the clamping region of the bolts for cutting a slot into the heads of the bolts during transport thereof through the clamping region; and a device for removing burrs resulting on the bolt heads during cutting of the slots.

Abstract: A "roll over" type vehicle wash apparatus includes a frame which is movable on a track and which is driven between a front end and a rear end of the track. The apparatus includes a pair of front arms and a pair of rear arms which are pivotally connected to the frame. Side wrap brushes are rotatably connected to each of the front and rear arms and are rotated about vertical axes. Positioned proximate the rear end of the track are arm deflectors which cause the rear arms to be driven inward toward one another as the frame approaches the rear end. This prevents the rear arms of the apparatus from being accidentally driven through doors at the ends of the bay area in the event of a failure of the actuators of the rear arms.

Abstract: A floor mop provided with an attachment carrying an abrasive pad on one side and a semi-abrasive pad on the other side of the mop swab. The pads are of rectangular shape and are connected to part of the mop strands in such a way that each pad remains flat and applies substantial equal pressure to a floor surface.

Abstract: A toothbrush having an elongated handle portion and an integral head portion which is elongated but normally shorter than the handle portion with both portions being substantially flat and lying in a common plane. The head portion includes an elongated shaft which extends from a juncture with the handle portion to a terminal bristle support section; the length of said head portion being sufficient to permit the bristle support section to reach the molars of a user when the juncture between the head and handle portions is positioned adjacent the lip of the user. A plurality of bristles are fixed to the bristle support section of the head portion and project therefrom in a direction generally perpendicular to said common plane. The axis of said head portion is disposed at an acute angle relative to the axis of the handle portion, and the bristles extend in the direction of the axis of the head portion.

Abstract: A wiper for a mirror such as the side view mirror on a truck or the like including a mirror mounted in a frame with a pair of chains and sprocket assemblies drivably positioned in said frame on opposite sides of the mirror and a wiper blade connected at opposite ends to the chains, the chains being driven in unison by an electric motor to move the wiper blades successively across the face of the mirror in wiping engagement therewith and behind the mirror back to a position for repeating the wiping engagement with the mirror face.

Abstract: A self-propelled cleaning device with wireless remote control includes a body, a driving device on the body for moving the same rotatably about its axis or in a straight line along the underlying ground surface, and a vacuum cleaning device carried on the body with its suction port open to the underside thereof. The cleaning device normally rotates on its axis at a stationary or fixed location on the underlying surface for concentrated spot cleaning of the underlying surface. The wireless remote control is effective to change the operative mode of the cleaning device from stationary rotation to straight-line travel.

Abstract: A vacuum cleaner floor tool is provided which comprises a housing, an air-powered turbine motor in the housing and an agitator partially extending from the housing. The agitator has spiral grooves therein which hold agitating devices, such as brushes or beater bars, and one end of the agitator is reduced or turned down to form a reduced diameter portion. The diameter of the reduced diameter portion is such that the spiral grooves form substantially flat surfaces and these surfaces are engaged by lugs on a connector fitted over the reduced portion. A transmission belt interconnects the connector with the turbine motor in order to drive the agitator. The floor tool has a removable base plate mounted on the housing which forms one wall thereof, and the agitator extends from the housing through an opening in the base plate.

Abstract: An attachment is disclosed for converting a rotary type lawnmower to a vacuum cleaner for picking up debris, such as grass cuttings, from sidewalks, driveways, and the like. The attachment includes a baffle member for positioning across the opening in the bottom of the housing of the rotary cutter blade. The baffle member has an opening through which air is pulled by the rotating cutter blade to lift and entrain debris from a sidewalk, driveway, or the like, and carry it into the housing for discharge through the discharge port of the housing. Means are provided for releasably attaching the baffle member to the housing so that the baffle can be attached when it is desired for the mower to act as a vacuum cleaner and removed when the mower is to function in the normal manner.

Abstract: An apparatus for suspending a traverse curtain on a common track assembly. The track assembly has opposed generally horizontally extending flanges. Mounted on the track is a carriage having spaced apart rollers, each of the rollers rotating about a respective and substantially vertical axis of rotation. A separate one of the rollers engages each flange for moving the carriage along the track. The rollers rotate in a plane parallel to the plane defined by the flanges. The rollers are located for preventing jamming of the carriage at curved portions of the track. Curtain supports are attached to the carriage for supporting a respective portion of the curtain.

Abstract: Poultry gizzards are washed down an inclined inspection table toward a worker standing at a pair of peeler rolls. The worker visually inspects each gizzard and removes those gizzards needing additional peeling to a repeel hopper and removes those gizzards that do not need additional peeling to a discharge hopper. The gizzards moved to the repeel hopper are washed to one end portion of the peeler rolls and are moved along the rotating peeler rolls and peeled. After peeling, the worker removes the gizzards from the peeler rolls and places them in the discharge hopper.

Abstract: A rotatable holder has a plurality of parallel carriers onto which sausage casings are gathered. The holder rotates to dip the casings sequentially in a treating liquid after which the carriers and casings emerge. When a carrier is aligned with a filling tube of a sausage-filling machine, the casing is transferred still in gathered condition from said carrier to said tube. Means are provided to hold the casing in place and to facilitate start up of filling of a new casing.

Abstract: An apparatus and a method is disclosed for cutting poultry, previously cut into front halves and rear halves, wherein each half is automatically and simultaneously cut into a desired number of pieces, a bucket conveyor being synchronized with the cutting operations so as to eventually receive a complete cut-up chicken in a single bucket.

Abstract: A pliers-like head-gripping tool for immobilizing and holding fish for skinning or scaling, or animals for skinning, has a flat-faced mouth-insertable lower jaw and an upper jaw provided with a skull-penetrating sharp-tipped conical point depending from a flat surface roughly parallel to the (preferably serrated) flat face of the upper jaw during normal use. The handle members of the tool are dip-coated with a tough and preferably slightly resilient plastic material. The lower handle member is downwardly and forwardly curved to partly embrace the hand of the user as an aid to a pulling action. The tool parts are so shaped and proportioned that the sharp tip of the point will be protectedly slightly spaced from the lower jaw surface when the handle members touch. A clip-on centrally apertured disc adjusts the tool to smaller game by reducing the effective dimensions of the conical point and the jaw gap.

Abstract: A pneumatic cleaning apparatus arranged at the infeed table of a spinning machine, especially a drafting arrangement, wherein the infeed table possesses a number of sliver infeed locations. Each infeed location has operatively associated therewith a pair of rolls, forming a nip, for conveying in each case a sliver from a sliver supply, for instance a can. Each infeed location further has operatively associated therewith sliver guide elements arranged neighboring the related pair of rolls. At least the sliver guide elements are operatively associated with an air conducting means operatively connected with a negative pressure source.

Abstract: A slide fastener stringer includes a stringer tape and a series of fastener elements sewn to the stringer tape on one of the opposite surfaces thereof along its one longitudinal edge by means of double locked stitches composed of at least one needle thread and a looper thread. The needle thread includes a thermoplastic monofilament yarn, and the looper thread includes a spun or multifilament yarn. The stitching has been done from the tape side of the slide fastener stringer. Loops of the looper thread project hardly from the topmost surface of the needle thread loops so that a slider is not likely to wear it out. Each of the needle thread has a constricted portion which serves to keep the looper thread loops from becoming loose. After stitching of the fastener elements to the tape, the thermoplastic monofilamentary needle thread has been heatset to suitably shrink and then become dimensionally stable.

Abstract: A pipe or casing spider coaxially overies a base ring and is provided with a plurality of slips supported by a slip ring above the spider. The slip ring and slips are moved vertically by a plurality of pressure cylinders interposed between the base ring and slip ring. A support plate coaxially underlies the base ring and is provided with a radial latch tongue slidable toward and away from the axis of the spider for maintaining a tubular string coaxially aligned with the spider.

Abstract: This invention relates to an improvement in an externally held cylindrical spreading means for tubular fabric, particularly for the treatment of the fabric with a fluid treating agent, with a central carrier for radially displaceable supports and segment-like guide elements carried by the supports, body means at each end of the central carrier, each of the body means being tapered in the longitudinal direction, and the guide elements extending in the longitudinal direction of the spreading means between the body means, the improvement comprising that the spreading means includes a pair of threaded sleeves mounted on opposite threads on the central carrier, radially-extending means with external magnetic pole means non-rotatably connected to the central carrier, and means for applying an external magnetic force on the magnetic pole means whereby the central carrier may be rotated.

Abstract: This invention relates to an improvement in an externally held cylindrical spreading means for tubular fabric, particularly for the treatment of the fabric with a fluid treating agent, with a central carrier for radially displaceable supports and segment-like guide elements carried by the supports, body means at each end of the central carrier, each of the body means being tapered in the longitudinaL direction, and the guide elements extending in the longitudinal direction of the spreading means between the body means, the improvement comprising pneumatic drive means within the spreading means connected to sleeve means on the central carrier, the sleeve means being connected to the radially displaceable supports and being displaceable on the central carrier, compressed air junction means in at least one of the guide elements and having a back pressure valve means therein, and means connecting the compressed air junction means with the pneumatic drive means.

Abstract: For manufacturing a crank arm for a welded crankshaft a flat blank is gripped along its contour in a ring-shaped holder and is subjected to pressing forces acting perpendicular to the plane of the blank to produce, by extrusion, a crank pin stub and a journal pin stub projecting from opposite sides of the blank, respectively. Each stub can be extruded in two stages, the first of which results in a by and large axial material flow while the second stage produces a combined axial and radial expansion of the first formed stub to circular cylindrical shape. Simultaneously with the first extrusion a fillet merging smoothly into the stub is pressed into that lateral surface of the blank from which the stub is extruded. The fillet may extend continuously around the stub or alternatively it may be indented only along that part of the stub surface which is oriented towards the other stub.

Abstract: A fabrication procedure for crystal resonators in which belted component holders are used, each accomodating the constituent elements of a resonator. When the above-mentioned elements are assembled, the component holders serve the purpose of assembly fixtures. The assembled resonators are retained in the component holders which thus also provide a packaging function for the final products. The component holders have elastically deformable clamps which accomodate the constituent elements of the resonators to be assembled and have support sections which receive the crystal element of each resonator.

Abstract: A tool is provided which enables one to place a reinforcing ring on both standard and miniature flexible magnetic discs. By a simple reversal of the parts two sizes of discs can be accommodated.

Abstract: A tool for use by pipefitters in joining a length of pipe to a fitting in which one end of the pipe is accommodated with a predetermined spacing between the end of the pipe and an internal shoulder within the fitting. The tool comprises jaws which may be clamped on the pipe when the end of the latter abuts the shoulder and includes shims movable from a position spaced from the pipe toward the latter to occupy a position between the jaws and the adjacent free end of the fitting, thereby providing for a predetermined spacing between the free end of the pipe and the shoulder of the fitting.

Abstract: A tool for removing a washing machine spin tube including a first member having an end surface which contacts the end of the spin tube. A pair of recesses on the end portion of the first member accomodates a pair of ears on the spin tube. A second member connects to the first member and is adapted for insertion within the spin tube and for contacting a bearing mounted within the tube. The second member is sized such that the first and second members contact the spin tube and bearing at substantially the same time.

Abstract: A method for manufacturing slide fastener elements from a metal strip by press working, each element comprising a head portion and a pair of spaced leg portions extending rearwardly from the head portion is disclosed. The head portion includes on each side of the top and bottom surfaces thereof a first projection extending substantially perpendicular to the longitudinal direction of the leg portions and a pair of second projections each extending from near one end of the first projection to rearward.

Abstract: A riveting device for joining a suspension or fastening device, particularly a ring mechanism, to a folder, comprises, a holder for positioning a folder in vertical alignment with a fastening device and below riveting means which is capable of moving through the fastening device and the folder to rivet them together. The support structure includes a lifting element engageable with one of the folder or the fastening device to move it relative to the other below the riveting means and into interengagement in a position for it to be riveted from the opposite side by the riveting device. With the invention, either the folder or the fastening device is arranged one over the other and below a riveting head and a lifting element is disposed to engage with the lower one of the two elements and move it upwardly into engagement with the other in a position to receive the rivet from the rivet head.

Abstract: A wire installing tool for inserting wire into a multifingered electrical connector comprising a handle containing a reversible elongated stem having recesses on both ends; the recesses being sized differently in depth to adapt to electrical connectors having various thicknesses, and a disposable blade releasably mounted on the stem and aligned with the recess to form a cavity which is bounded on three sides by the stem and on the fourth side by the blade, the depth of the cavity dependent upon which end of the stem is aligned with the blade. At least one end of the blade has a two-sided edge, the outer side shaped at an optimum shear angle for shearing wire to be inserted in the electrical connector, and the inner side of the edge being shaped to allow for a wire tail to protrude a predetermined distance from the electrical connector.

Abstract: A combined tool storage and tool change arrangement for use with a machine tool of the type which includes a power driven rotatable spindle having a socket which receives a tool shank of a predetermined size. The tool storage arrangement comprises a main tool storage magazine with a plurality of tool receiving sockets sized to respectively receive a tool having a shank of said predetermined size. Means is provided for moving the main tool storage magazine whereby to present a predetermined tool receiving socket and the tool therein to a first tool transfer point. An auxiliary tool storage magazine is provided for receiving and storing a plurality of tools having shanks of a different size than said predetermined size. The auxiliary tool storage magazine has a shank of said predetermined size whereby the auxiliary tool storage magazine may be stored in a socket of the main tool storage magazine.

Abstract: A method for producing semiconductor laser elements from a wafer wherein the wafer is prepared having light emitting regions and then the wafer is scribed and cracked in order to form the semiconductor elements. The scribing is executed on a major surface of the wafer in such a way that scratches are formed along a separation line only on the surface of a crystal substrate of the wafer but not on the substrate over the formed light emitting regions. The cleaved surface developed by the cracking step is very flat in an area where the light emitting region is exposed to provide a mirror surface that forms a laser resonator. Desirably, the major surface of the wafer is covered with a protective film on at least the part of the surface over the light emitting region, prior to performing the scribe step. More desirably, this protective film consists of an electrode metal, such as Au or a resin, such as a photoresist material.

Abstract: A field effect transistor having an extremely short channel length in which a doped semiconductor layer of one conductivity type has oppositely doped source and drain zones in a surface side thereof. A first gate electrode is separated from the semiconductor layer surface by an insulating layer. The first gate electrode covers the region between the source and drain zones with the exception of a strip-like semiconductor region directly adjoining the source zone. A second gate electrode is provided above the strip-like semiconductor region and is insulated from the first gate electrode by a second insulating layer. The first gate electrode is connected to a bias voltage source and the second gate electrode is arranged to be connected to a control voltage.

Abstract: Integrated MOS circuits with and without MNOS memory transistors in silicon-gate technology are produced with overlapped contacts using a silicon nitride mask. After production of structured SiO.sub.2 layers on a p- or n- doped semiconductor substrate to separate active transistor zones in accordance with the so-called LOCOS process, a silicon nitride layer is deposited onto the surface and is then structured so that the zones in which a gate oxide is to be produced, are uncovered and during gate oxidation, the surface of this structured silicon nitride layer is converted into an oxynitride layer. In contrast to previously known processes, the invention provides self-aligned overlapped contacts with oversized contact holes. The silicon-nitride layer functions as an etch-stop during etching of an intermediate oxide. This avoids under-etching of the polysilicon during contact hole etching. The overlapped contacts allow a substantial increase in the packing and integration density of the so-produced circuits.

Abstract: A method of manufacturing a cradle adapted for use in a thermostat to support a plurality of switch means respectively adapted for operation at predetermined trip points. This method includes: fabricating from generally planar and thin material a plurality of cradle legs respectively having a pair of opposite end portions with at least one opening in one of the opposite end portions of at least one of the legs and at least one integral extension on at least another one of the opposite end portions of at least another one of the legs; and pivotally interconnecting the other of the opposite end portions of the legs with respect to each other and inserting the at least one integral extension means through the at least one opening.

Abstract: A method for automatically installing covers on industrial lead-acid battery cells including the steps of placing cell groups within a cell jar, then automatically straightening the posts of the group. The cover is then placed on the jar containing the group, the cover is sealed to the jar, and the excess flash, which may have been produced during the cover sealing operation, is removed. Next, the posts are welded to bushings mounted in the cover. The sealed cell is then tested to insure that no leaks are present. Those cells passing the seal test will be passed on for further assembly operations while those cells which do not pass the seal test will be automatically shunted aside for subsequent manual inspection and rework where possible. The apparatus comprises a series of interlocked and interrelated conveyors, accumulators and pinchstop mechanisms which automatically convey the cells being sealed to machines which perform the operations delineated in the aforementioned method in the proper sequence.

Abstract: A punching machine comprising a housing, a plunger having a punch at one end, and an electromechanical drive such as a solenoid carried by the housing and operatively connected to the plunger for driving the plunger in a direction along the longitudinal axis thereof when electrically energized to drive the punch into a workpiece and then withdraw the punch therefrom. The plunger is disposed in a housing passage in a manner permitting a degree of rocking movement of the plunger in a plane substantially parallel to the plunger longitudinal axis. A flexible guiding device in the form of a sleeve surrounding the plunger and an O-ring engaging the sleeve and the housing guides the plunger in a direction toward and away from the workpiece and also in the direction of the rocking movement. Electric current is supplied to the electromechanical drive by a circuit including a controlled rectifier connected in controlling relation to the drive and having a gate terminal connected to trigger pulse producing device.

Abstract: An improved tamperproof container for lyophilized material wherein the container comprises a vial having flange about its opening. Below the flange, but spaced apart therefrom is a shoulder to define an indented neck therebetween. The opening is sealed with a pierceable stopper. An overcap extends over the flange and about the neck to form a skirt about the neck. The skirt has at least a portion thereof extending inwardly in gripping reaction with the neck and limited in removal by contact with the underside of the flange whereby the cap cannot be removed without destroying its structural integrity.

Abstract: An apparatus for the drying of a slurry being conveyed on a movable support including a steam producing arrangement below the movable support forming a steam atmosphere. A film of condensed vapor is produced above the slurry caused by heat transfer through the movable support, and an air drying arrangement is adapted to propel a stream of air across the slurry surface so as to entrain the vapor therein and to remove it from the slurry.

Abstract: Material treatment apparatus includes a vibrating conveyor and a gas flow system for fluidizing particles on the conveyor as they move through the treatment zone. Containment structure extends along the length of each side of the treatment zone and includes a side wall surface portion affixed to and movable with the conveyor and a cooperating fixed structure with an edge closely adjacent but spaced from the surface portion that defines an elongated orifice extending along each side of the treatment zone. Gas flows through each orifice and downwardly along each side wall surface towards the treatment zone and provides effective containment action that prevents particles on the conveyor from passing laterally from the treatment zone.

Abstract: A receptacle that can be incorporated into a molded body includes a metal receptacle and a case in which at least part of the metal receptacle is imbedded. The receptacle made in accordance with the present invention can be embodied in sport shoes, particularly golf shoes, to receive cleats. Such a receptacle is particularly suited to direct incorporation into relatively soft molded materials, such as polyurethane.

Abstract: A shoe of natural shape having a flexible material forming the upper part of the shoe, replacing the insole, and extending all over the sole surface to comprise a stocking-like part which extends over the last to envelop the foot on all sides, there being a recess in the heel portion of the footbed with a bearing surface rising from this recess on a forward rising angle to the arch, the bearing surface being cup-shaped with a peripheral edge connected to the stocking-like part.

Abstract: A blade assembly for a tractor or other like vehicle of the type adapted for movement over snow covered terrain, having a horizontally extending first blade with second blades mounted at the opposite ends thereof for pivotal movement about vertical axes. Top plates are fixed relative to and extend forwardly from the first and second blades. The second blades are pivotally adjustable between open positions extending angularly outwardly from the first blade, and closed positions extending angularly inwardly from the first blade to cooperate therewith in defining an enclosure. The enclosure has a bottom opening defined by the lower edges of the blades, and a top opening which is smaller than the bottom opening and which is defined at least in part by the top plates.

Abstract: A side cutter apparatus for an excavating machine having a plurality of spaced rotating digging wheels mounted on a common horizontal shaft, each wheel having a pair of spaced sidewalls, and having frame rails partially extending into the spaces between adjacent wheels; which includes a base plate affixed to the periphery of a cut-away section of a sidewall adjacent to the open space between the wheels; a pivotal side cutter including a back panel disposed in the cut-away section and pivotally mounted at its lower end on the base plate so as to pivot into the open space, a front panel disposed essentially parallel to the back panel and pivotally mounted at its lower end on a common axis with the back panel so as to be pivotally movable therewith, a cutting tooth affixed to the upper portion of the front panel and extending into the open space, a roller rotatably mounted on an axis perpendicular to the front panel and extending through the same into a vertical space between the panels wherein the roller is dir

Abstract: A continuous vertical the ground-excavating method which comprises driving a guide post vertically into the ground deeper than the predetermined depth of excavation so that said guide post can stand independently of excavation, fixing a lower earth loading mechanism to a desired part of said guide post by using slidable securing means, excavating the ground and placing the excavated earth onto said lower earth loading mechanism, carrying up the excavated earth vertically from said lower earth loading mechanism by a conveyor system comprising endless chains and conveying containers, and further carrying the earth along an upper horizontal earth discharging mechanism secured to the top end of said guide post so as to extend horizontally, lowering said lower earth loading mechanism by a distance equal to the depth of the ground excavated, then cutting the endless chains and adding complementary endless chains while mounting supplementary conveying containers, and repeating said steps the required number of times

Abstract: A tag fastener assembly wherein the tag is locked to the fastener and wherein the fastener is provided with means by which it may be secured to an article such as the carcass of an animal.

Abstract: A card for displaying price or other graphic information is mountable on a price rail of a conventional store display shelf, stand, or the like, and includes a central information carrying portion, and opposed tabs extending therefrom which are adapted to be retained in a conventional price rail. One of the tabs includes a remote enlarged portion suitable for containing information thereon and connected to that tab by a rib or a bridging portion which extends from an edge of that tab which is not retained by the price rail when the card is mounted therein.

Abstract: In cartons made from laminated packaging material wherein a peelably removable section of the outer ply is defined by a weakened tear line and said section is unadhered to the substrate, resistance to unauthorized tampering or removal of such section from said container is achieved by utilizing a water soluble adhesive as a laminant and including a border area of said section at the starting point of the tear outline within the area of adherence by said laminant to thus require application of moisture to said border area to dissolve said adhesive at said area before the tearing away of such section can be accomplished.

Abstract: A communications device including a display panel having a plurality of symbols arrayed thereon in a circle, each of the symbols indicating a particular idea to be communicated, and a pointer projecting radially from the center of the circle. An indexing mechanism is provided for producing incremental relative rotational movement between the pointer and the display to cause the pointer to be aligned with the next successive one of the symbols upon receiving a single manual input. Preferably, there are two display panels facing in opposite directions and a pointer corresponding to each panel. Each symbol on one panel has counterpart on the other and the pointers move in synchronization.

Abstract: Readily assembled animal trap comprising a one-piece spring-actuated jaw/torsion spring and a one-piece molded plastic base with projections for receiving the jaw/spring unit.

Abstract: The invention relates to an animal trap comprising a tunnel shaped housing, which is open at one of its ends, at the opening or entrance end of which housing a clamping device is provided, which is movable in the cross direction of the housing, the clamping device being released by actuation of a sensing organ located behind the same.

Abstract: A doll house has a base with a series of interconnected grooves, a first front wall, two tall vertical front walls, a shorter side wall and a shorter interior wall. A floor member engages those walls and cantilevers outward over the shorter interior wall. Together the floor member and base and walls form a rigid frame to which remaining panels of the doll house are connected. A front door assembly with side lights and platform steps are grooved to be tightly held within a door opening. A second short front wall and a side wall are captured between the cantilevered portion of the floor member and the base, further promoting stability. An intermediate floor and front, top, and side roof panels and chimney connectors complete the basic structure.

Abstract: A set of building blocks readily assembled to form a variety of houses comprises several flexible wall elements, flexible roof elements, roof forming elements, roof connecting elements, cubic elements, and base boards which can be connected side by side to construct a base as a ground member of the houses. The wall elements can be bent into different configurations so as to act as side walls at one's desire.

Abstract: An improved frictional interconnecting toy block arrangement having a hollow body means fabricated of a semi-flexible material such as a blowmolded plastic. The interconnecting of the toy blocks with each other is achieved by female coupler means and male couplers. The male couplers are part of the body means and unitarily fabricated of blowmolded plastic during the fabrication of the body means. The female coupler means are fabricated of a more rigid plastic such as an injection molded plastic which can be fabricated to close tolerances. The female coupler means fits and is retained within apertures molded into the walls of the body means. Relief means, such as slots, are provided in the female coupler means to allow for dimensional variations of the male couplers that are inherent in the blowmolding process and still provide interlocking with the male couplers.