Abstract: Electrophoresis gels are formed using a gel-forming insert having a beveled edge which results in loading sites having a beveled bottom surface. The gel forming insert can have a continuous beveled edge across the entire width of the gel, in which case a special loading insert is used which matches the bevel of the gel. Alternatively, the gel forming insert may be formed with a plurality of fingers with beveled ends, each finger defining a well in the gel. In one form of the gel-forming insert, the fingers are formed from a soft, flexible polymer such as silicone applied on a rigid support.

Abstract: A manhole lift insert positioning apparatus consisting of: (1) a threaded nut imbedded in a thermoplastic elastomer molding that fits snugly within a lift insert, and (2) a threaded wing bolt to engage the nut and expand the molding within the insert, thereby locking it in position and drawing the molding against the inside face of the concrete form, thus sealing the insert opening to avoid obstruction of that opening with concrete.

Abstract: A wedge apparatus for use with molds and a mold utilizing at least one wedge apparatus. The wedge apparatus includes a pair of attachment portions, each having an attachment surface and a wedge surface, a wedge portion, and a shaft. The wedge portion is slidably attached to the attachment portions and has a center portion terminating in a pair of center edges disposed at opposite angles to the wedge edges such that the center surface and the wedge surfaces form a substantially continuous mold surface. The shaft is attached to the center portion and extends through an opening through a cross member to maintain the center edges of the wedge portion in alignment with the wedge edges of the attachment portions.

Abstract: A reusable anchor bolt template (10) and method for suspending an anchor bolt (56) into a concrete material (53) and adapted to be fastened to a single form element (54) at a top end and a bottom end of the form element (54). The preferred embodiment (10) of a reusable anchor bolt template is comprised of a form plate (11) that engages and rests upon the top portion of the form element (54). Adjustably attached to the form plate (11) is a securing strap (12) for engaging the bottom end of the form element (54), thereby securing the template (10) to the form element (54). Attached to the form plate (11) is a means for suspending an anchor bolt (56) into poured concrete (53), preferably comprising a first and second primary support elements (18, 19) attached in cantilever fashion to the form plate (11). In the preferred embodiment (10), two parallel secondary support members (27, 28) are adjustably attached at each end to the first and second primary support members (18, 19).

Abstract: A mold for casting ground covering, such as a plurality of stepping stones, has a generally polygon concrete molding frame having top and bottom surfaces in parallel planes and divided into openings. The frame is generally square and may include nesting polygonal configurations. Each wall has a plan shape of contiguous line segments connected at obtuse angles. A first diagonal wall extends approximately from the first corner to the third corner, and a second diagonal wall extends approximately from the second corner to the fourth corner. The first perimeter wall is geometrically congruent with the third perimeter wall and the second perimeter wall is geometrically congruent with the fourth perimeter wall. The diagonal walls are geometrically congruent with the second and fourth perimeter walls.

Abstract: The present invention is directed to a mold for forming concrete walkways or surfaces. The mold incorporates a plurality of openings for receiving concrete therein. The mold forms a single concrete slab having a simulated brick or rock pattern on it's surface. Concrete walkways are formed by placing the mold of the invention on a surface and pouring concrete in the openings. Upon removal of the mold, the concrete retains the pattern. The procedure is repeated to form a walkway of a desired length, width and configuration.

Abstract: A frame for supporting a mold for use in manufacturing a product from expanded polystyrene. The frame includes angled corner locking members having longitudinally projecting guide portions located at each end, and longitudinal side members having longitudinally projecting complementary guide portions located at each end. The guide portions and the complementary guide portions are adapted to slidably interfit with one another to form an interlocked engagement. The angled corner locking members and the longitudinal side portions further include recessed portions located on interior facing walls for supporting the mold on the frame.

Abstract: A removable support apparatus for supporting a swimming pool cover employs adjustable frame assemblies capable of spanning between opposite edges at opposite sides of the pool. Each frame assembly includes a pair of separate frame members placed in side-by-side relation to one another so that together they define the overall length of the frame assembly. The frame members are displacable longitudinally relative to one another to adjust the overall length of the frame assembly to match the distance between the opposite edges of the pool so that the frame assembly can fit across the pool between its opposite edges. Each frame assembly also includes an end support member attached to the outer end of each frame member and supporting the frame member from one of the opposite edges of the pool.

Abstract: Disclosed is a collapsible plug which is insertable into the interior section of an appliance cabinet and expandable therein to simultaneously extend the plurality of panels to provide lateral shoring support to each of the interior surfaces of the cabinet so as to prevent bulging thereof during the injection and curing of insulating foam in the cavity between the interior surfaces and external surfaces of the cabinet, and collapsible so that the plug can be inserted into and removed from the cabinet interior without contacting the interior surfaces during insertion nor removal. Particularly, the disclosed design allows different thicknesses of tooling panels having surfaces complementary to the interior surface of the cabinet to be employed without concern for contact between adjacent panels upon their retraction due to the additional thickness.

Abstract: A large, curved or spherical shell of reinforced concrete is cast without utilization of supporting framework. A casting formwork is in the form of a thin, suspended membrane that is reinforced with a collar. During construction and transport, the membrane is preliminarily equipped with a reinforcing compression ring.

Abstract: A device for temporary retention of a lifting element on a metal surface of a form during the concrete pouring and setting phases of a prefabricated concrete member includes a part which is designed to form a depression in a concrete section and is equipped with magnets for attachment to a metal surface of a form. The device includes a part having a flat face, a recess terminating at a face opposite the flat face and orthogonal thereto desinged to permit passage with sealing action of a lifting element, and a slot terminating in the flat face. A locking element is mounted in the slot and pivots around an axis transverse to the slot. The locking element has a hook which forms a bolt designed to ensure retention of a free end of the lifting element when the locking element is in an unlocked position in the slot.

Abstract: A device is provided to facilitate the dispensing of ice cubes from a flexible plastic ice cube tray having long edge lips. The device, of monolithic construction, has a small chamber for receiving and dispensing ice cubes from separate rows of the ice cube tray, and an adjacent large chamber for receiving and dispensing ice cubes from the entire ice cube tray. The device is provided with engagement rails that slideably engage the large edge lips of the ice cube tray.

Abstract: An adjustable hanger for supporting a concrete form which includes a first bracket having a downwardly-extending portion for engaging an edge of an I beam flange, a second bracket for engaging an I beam flange, and a threaded rod screwed into and extending between the first and second brackets so that the second bracket can be adjusted in spacing from the first bracket to enable the hanger to accommodate a variety of I beam flange widths. In the preferred embodiment, the second bracket includes an upwardly extending portion having a wedge-shaped slot and an outer arcuate bearing surface. The upwardly extending portion receives a bolt for supporting cantilevered formwork and the bolt is retained within the slot by a nut which rests against the arcuate bearing surface. The retained bolt can be pivoted throughout a range of angular orientations relative to the second bracket as the circumstances of use may require.

Abstract: A consumable tent which is positioned above a metal mold before pouring of the molten metal. The tent is formed of one or more sheets of corrugated stock which angle is downwardly and outwardly of the mold to deflect sand away from the mold interior. The tent defines an opening spanned by a cover which is consumed by the molten metal to allow the metal to reach the mold through the opening.

Abstract: A mold assembly for producing a skin-covered foamed plastic article is disclosed, which includes a lower mold having a cavity formed therein, the lower mold having a first flange portion which extends around a mouth of the lower mold; an upper mold which is to be put on the lower mold to close the cavity, the upper mold having a second flange portion which is mated with the first flange portion of the lower mold when the two molds are properly coupled; a recess at an inside part of the first flange portion which is defined by a horizontal wall and a vertical wall; a press plate which is pivotally connected to the horizontal wall of the recess; a spring for biasing the press plate in a direction to achieve an abutment with the horizontal wall; and a press structure provided on the second flange portion of the upper mold, the press structure abutting on the press plate to press the same toward the horizontal wall when the upper mold is properly mounted on the lower mold.

Abstract: A mold assembly for producing a skin-covered foamed plastic article is disclosed, which includes a lower mold having a cavity formed therein, the lower mold having a first skirt portion which extends around a mouth of the lower mold; an upper mold which is to be put on the lower mold to close the cavity, the upper mold having a second skirt portion which is mated with the first skirt portion of the lower mold when these two molds are properly coupled; and a pair of holding plates which are detachably connected through fasteners to spaced portions of the lower mold, each holding plate including a first portion which is detachably connected to the first skirt portion and a second portion which extends over a given wall portion of the cavity of the lower mold, whereby when a bag-shaped outer skin member is properly set in the cavity, the holding plates press given portions of the outer skin member against the inner wall of the cavity.

Abstract: A power press for manufacturing profiled bodies from a thermohardening bonding agent mixed with fibrous materials and utilizing at least two hot pressing steps, including an inner pressing tool part having a first surface, an outer pressing tool part having a second surface and engaging the inner pressing tool part wherein the first and second surfaces of the inner and outer pressing tool parts are shaped to correspond to the shape of the profiled body to be pressed, and a holding arrangement for holding the profiled body to be pressed fixed during at least two of the hot pressing steps so that the power press acts at the same place on the profiled body to be pressed during each one of the hot pressing steps and thus prevents damage to the profile body to be pressed caused by shrinkage occurring during at least one of the hot pressing steps.

Abstract: A mold comprises a pair of openable and closeable mold halves separable along a parting line. By this invention, each mold half defines a recessed outer surface portion which communicates with the recessed portion of the other mold half in the closed position. Each mold half defines a bridge portion which extends over its recessed portion and is positioned adjacent to the parting line. Thus, a lifting hook may pass into the recess defined by the outer surface portion to engage the bridge portion of a separate mold half, or to engage both bridge portions of both mold halves in the closed position.

Abstract: In a low pressure mold, the mold parts have surfaces for forming a mold cavity and which are covered in a thermally insulating coating with a thickness from 0.005 inches to 0.050 inches. The coating may be formed from epoxy resin or polytetrafluorethylene. Also provided is a sealing member for a low pressure mold, the sealing member having in-series edge regions around a body and each edge region is formed with a semi-circular sealing edge or arrangement of edges. The sealing edge or arrangement of edges of each edge region is different from other edge regions. When the two sealing members are mounted upon mold halves at each end of a low pressure mold, they may be changed in position to locate any associated pair of sealing edges in opposition across the mold closure line.

Abstract: A top concrete section for a manhole assembly is cast with a plurality of bolt slot inserts each insert having a substantially inverted T-shaped hollow interior for slideably receiving a nut which may be moved to any desired position along the base of the insert for threadedly engaging a threaded rod employed to rigidly secure a cast iron cover frame to the top section.The method for casting a manhole top section comprises the steps of releasably mounting each insert within the mould assembly by means of a retaining slide which itself is slideably received within a pair of holding brackets provided on each of the inner and outer mould members, the insert being substantially fully closed on all sides thereof and having a top surface formed of a thin web which is easily fractured or cut away after the top manhole section is cast. The fully enclosed insert prevents any concrete from entering into the interior thereof.

Abstract: Bosses project from the outer surface of the ingot mold and are arranged in a planar zone, each of the bosses contains a channel that has slidably positioned therein an anchor which is projected beyond the outer surface of each boss into each boss. The projecting portions of the anchors are attached to a continuous reinforcement band extending between the projecting portions of the anchors. The continuous reinforcement band is spaced from the ingot mold. Stresses and strains caused by teeming (pouring) hot molten metal into the ingot mold are absorbed by the continuous reinforcement band.

Abstract: A mold holding apparatus is disclosed for securely holding plaster molds used in the production of ceramic, porcelain and plastic items permitting molds to be oriented so as to permit filling of pour holes present in molds, and to facilitate the uniform pouring off of excess slip. The apparatus includes adjustable retainers for removeable attachment of a mold to a rotatable platform, and center of mass adjustments and frictional contact surfaces for uniform rate of pouring off of excess slip.

Abstract: An integral wire clip one end of which is to slip over the top edge of an elongated cement form and be snugly connected thereto. The opposite end of the clip is formed into a spring biased section which includes a pocket. Within the pocket there is to be located a section of a reinforcing bar. With the reinforcing bar located within the pocket, the reinforcing bar is snugly held in its established position against the elongated form. The wire clip also includes a handle section to facilitate movement of a portion of the wire clip for the purpose of facilitating initial positioning of and disengagement of the reinforcing bar within the pocket.

Abstract: A concrete crosstie has a recess for holding a rail securing member engaging beneath a nose in the recess. Upper ends holding the rail down resiliently are loop-shaped, to obtain a low surface pressure at two spaced areas and exact positioning of the rail securing member in the recess. The greatest possible crosstie cross-section is retained in that the recess only partially penetrates the concrete crosstie. The nose lower and side faces and the rail foot support surface are formed by steel reinforcements connected to the concrete.

Abstract: A bead seal ring for use in the retreading of radial tires by use of a bead sealing ring unit that provides positive mechanical pressure for sealing the curing envelope between the bead sealing ring unit and the bead area of the tire by a radial force. In its relaxed or initial condition, the bead sealing ring unit has a diameter smaller than the bead diameter of the tire. The bead sealing ring unit is placed into sealing position and then expanded by a locking device secured to a metal band which is part of the bead sealing ring unit.

Abstract: A bolster pin is provided which automatically cleans the flask bushing of a mold set. The bolster pin has brushing elements which clean the flask bushing each time the mold set is joined or separated. Use of the bolster pin provides a method for automatically cleaning the flask flange bushing of entrapped sand.

Abstract: A support structure formed in one or more sections, the support structure having vertical legs which are extensible at upper and lower ends thereof and being able to support concrete building forms at two different levels utilizing horizontal saddle beams near the top thereof to support a building form at one level with the extensible upper legs supporting a second building form at a second level. The saddle beams each include a pair of vertically spaced support surfaces preferably in the form of a pair of outwardly extending flanges proximate the top and bottom of a central web extending outwardly from the beam to form opposed surfaces, flanges or ledges and a connector at either end of the saddle beams, for securing the saddle beams to the legs, each connector preferably connected to the saddle beam by a bracket supported by the spaced support surfaces and secured to the web of the saddle beam to abut the opposed flanges.

Abstract: A hoisting attachment for a tilt-up wall slab is provided with a remotely operable quick release mechanism which is under the control of the positional attitude of a hoisting cable-attached shackle.An improved assemblage of wall slab insert anchor, support stand for the insert anchor, and a recess former frictionally attached to the upper end of the anchor is also provided.

Abstract: In a die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die, the invention provides individual longitudinal position adjustment for the core rods by fitting the end of the core rods in a threaded member such as a set screw threading in a threaded bore in a core rod support member. The core rod support member is in the form of a pair of plates one defining a core rod support plate and the other a retainer plate, sandwiching a plastic locking plate. The core rods are immobilized in their adjusted position by the plastic locking plate, sandwiched between the core rod support plate and the retainer plate, being provided with a threaded bore aligned with the threaded bore in the support plate and having a slight screwthread mismatch with the threaded bore in the support plate.

Abstract: A die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die. The invention provides individual longitudinal position adjustment for the core rods by fitting the end of the core rods in a threaded member such as a set screw threading in a bore in the core rod support plate. Alternatively, the invention provides for position adjustment of the core rod support plate by supporting the support plate below the die plate by spacer sleeves having a threaded peripheral portion threading in a bore in the core rod support plate. By combining an adjustable core rod support plate with individually adjustable core rods, the core rods can be adjusted longitudinally relative to each other, and in unison by way of the position adjustment provided for their support plate.

Abstract: A leader pin for guiding and directing the halves of a mold as it opens and closes. The pin has a base, a shoulder at one end of the base, and a frustoconical tapered section which extends outwardly from a ledge on the base. A cylindrical guide pin projects outwardly from the narrow end of the tapered section. The tapered section and the guide pin fit into a complementary tapered and cylindrical opening in the sleeve of a bushing. The two tapered sections accurately guide, direct, and align the mold halves, without the assistance of separate cones and conical orifices.

Abstract: Alignment apparatus for use in erecting shelter structures, the apparatus comprising an eccentrically-shaped cam portion having an endless cam surface extending between first and second faces, a recess disposed in the first face, and a shaft extending from the second face in alignment with the recess, the shaft being adapted to be received in a bore in a vertical wall, the cam surface being adapted to receive and support a portion of a horizontal wall member.

Abstract: An apparatus for producing a cage made of castable or injection moldable material for cylindrical rollers in which the pockets of the cage are defined by webs having projections projecting into the pockets at their longitudinal sides for radially retaining the rollers comprising slide plates radially moveable for forming the roller pockets, each slide plate being formed of several partial slide plates, the end faces of the slide plates having cover plates arranged thereon to cover the connection juncture between the partial slide plates and secured to one of the partial slide plates.

Abstract: During positioning of the cylindrical, open ended, outer member relative to a point on a slab form, a cap member may be used to cover the top and support a location determining member. The length of the outer member is adjustable to the thickness of the concrete layer to be poured. A cylindrical inner member, with a closed bottom and an open top, is inserted into the outer member. As the concrete is poured, it is received in the inner member and forms the test core. After the concrete sets, the inner member is removed, resulting in a hole in the concrete. The cap member is alternatively adapted to close the bottom of the outer member, prior to mounting the outer member on the form, to permit the hole to be subsequently filled, if the form has been removed.

Abstract: A tire press bag well is insulated with at least one envelope. The envelope extends substantially around the bag well within the bag well housing and can be inflated. The envelope, in addition to its insulating properties, can have insulation thereon and the ends of the envelope can be fastened to itself. The configuration of the envelope, once installed, desirably conforms to the shape of the bag well housing. Since heat is applied to a tire press via the bag well, insulation thereof considerably reduces heat loss as well as reduces cure time.

Abstract: This invention relates to a method for reinforcing and repairing cast iron molds by surrounding the mold with a closely fitted steel plate or plates, connecting the ends of the steel plate or plates to form a continuous band, attaching the continuous band to the cast iron mold and locating spacers between the cast iron mold and the continuous band to elevate the band from the cast iron mold wall surface. This invention further relates to a method for reducing shear stress on the means by which the continuous band is attached to the mold by locating the means of attachment around a corner from the source of stress at an obtuse angle to the mold wall being reinforced.

Abstract: The method for forming a concrete deck includes top adjustable removable hangers depending from opposed walls, beams or girders to support length adjustable ledgers, which ledgers support deck joists and decking associated therewith and upon which concrete deck will be poured to form a slab supported upon the walls, beams or girders. Means are incorporated to permit assembly from the top of the hangers, ledgers, deck joists and decking and to permit vertical adjustment of the ledgers from the top to bring the decking to grade elevation. Further means are incorporated to permit disassembly of the hangers, ledgers, deck joists and decking from the bottom after cure of the poured concrete deck.

Abstract: Top adjustable removable hangers depend from opposed walls, beams or girders to support length adjustable ledgers, which ledgers support deck joists and decking associated therewith and upon which a concrete deck will be poured to form a slab supported upon the walls, beams or girders. Means are incorporated to permit assembly from the top of the hangers, ledgers, deck joists and decking and means are included in the hangers to permit vertical adjustment of the ledgers from above or below to bring the decking to grade elevation. Further means are incorporated to permit disassembly of the hangers, ledgers, deck joists and decking from the bottom after cure of the poured concrete deck.

Abstract: Apparatus for forming a concrete deck includes top adjustable removable hangers depending from opposed walls, beams or girders to support length adjustable ledgers, which ledgers support deck joists and decking associated therewith and upon which a concrete deck will be poured to form a slab supported upon the walls, beams or girders. Means are incorporated to permit assembly from the top of the hangers, ledgers, deck joists and decking and to permit vertical adjustment of the ledgers from the top to bring the decking to grade elevation. Further means are incorporated to permit disassembly of the hangers, ledgers, deck joists and decking from the bottom after cure of the poured concrete deck.

Abstract: A generally cylindrical body is molded from a soft plastic such as polyethylene. A reduced diameter coupling boss is formed at one end of the body, projecting from an alignment shoulder. An exterior alignment flange is formed at the other end; and a coupling recess is also formed in that other end having a diameter for a friction fit with the coupling boss of a mating natch body. The body includes means defining a relatively large retainer flange intermediate its ends, having opposed recesses so that its periphery is noncylindrical. Natches of this configuration are used as mating natches for both parts of a two part mold, with the alignment shoulder and alignment flange coinciding with the parting lines of the respective mold parts.

Abstract: A hold-down anchor device for securing reinforcing strands in a mold while the strands are tensioned, the mold filled with concrete, and the concrete allowed to set, is held in place by an anchor means traversing the mold wall. The hold-down anchor device includes a pair of side frame elements which are disposed parallel to each other and positioned generally vertically in the mold. A number of strand hold-down means extend transversely between the side frame elements. A swivel means is pivotally secured to the lower ends of the side frame elements and includes means for engaging the anchor means. The swivel means further includes means for retaining one or more reinforcing strands near the lower ends of the side frame elements in corresponding closely spaced relation with the mold. The swivel means may include either grooves or rollers for retaining the reinforcing strands near the lower ends of the side frame elements.

Abstract: An attachment for use in anchoring a safety belt on a vertically extending supporting member such as a frame member of a concrete wall form side includes a plate-like bracket member and a connecting member extending outwardly from one face of the bracket member. The bracket member is disposed on one side of the supporting member and projects outwardly beyond a vertical free edge thereof in use, while the connecting member is inserted through an opening in the supporting member, which may be an opening provided for other purposes in a frame member of a form side, for securing the attachment to the supporting member. An opening is provided in the projecting portion of the bracket member, and it serves to receive an element of a safety belt for connecting the belt to the bracket member.

Abstract: A die assembly includes relatively movable first and second dies, and a plurality of guide pin assemblies mounted on the first die and an equal plurality of aligning passageways formed in the second die for receiving the respective guide pin assemblies. Each of the guide pin assemblies includes a first section mounted within the first die, and a second aligning pin section connected to the first section. Each aligning pin section extends above the surface of the first die for entering one of the plurality of aligning passageways for aligning the first and second dies. Each aligning pin section is detachably connected to a first section and is detached after the first and second dies have been aligned and are ready to be used. In this manner, when the first and second dies are differentially heated during use, the problem of scoring or damaging the aligning pin sections is avoided.

Abstract: A screed bar support stake and method are uniquely adapted to concrete screeding operations utilizing a vibratory-type screed. The stake is formed with means which allow it to be located after the concrete has been poured and is also adapted with means enabling the stake to be removed for reuse before the concrete hardens thus saving the cost of the stake. A mating drive member facilitates easy placement of the stake.

Abstract: A clip is disclosed for insertion in a hole in the side of a paving form. A paper sleeve, diamond-shaped or rectangular in cross section, covers one leg of a tie bar, and the sleeve is supported in the clip. After a slab is poured and the form is removed, the clip and hole identify the position of the tie bar, which is pulled outwardly in preparation for the next pour. The rectangular protective sleeve can be used without the clip, in that it positions the leg of the tie bar closely adjacent the paving form, without the interposition of extra concrete around the edges of the sleeve.

Abstract: An apparatus, and method, for producing finger and thumb holes in one bowling ball which are identic to those existing in another bowling ball; the essential purpose being to duplicate--in a new bowling ball, for example--the exact size, shape, direction, and span of the finger and thumb holes in an existing, properly hand-fitting, bowling ball.

Abstract: A mould for use in a metallothermic welding process of at least two metal items together comprises at least two parts for arrangement around butts of each of the metal items to define a pouring cavity which is adapted to receive hot welding fluid. At least one of the faces of the mould, which in use will contact either a part of one of the items to be welded or another portion of the mould, defines a projection which presents sloping side towards the exterior of the pouring cavity. A strip of a compressible material which is little affected by heat is fitted on the projection in order to abut said part of one of the items or the other portion of the mould.

Abstract: A rim shield is disclosed for use in conjunction with a porous mold in molding ceramic articles using a slip casting process. Use of the rim shield prevents the deposit of excess clay to the lip or rim of a molded article.

Abstract: A closure mechanism for a metallographic sample pressure molding system includes a mold cylinder having a bayonet socket for receiving a closure member which includes an upper ram mounted thereto for lockably enclosing the mold chamber defined by the cylinder. The closure member includes a cam and means for actuating the cam for moving the upper ram an incremental distance to break flashing from the molded metallographic specimen once cured for facilitating removal of the specimen and its surrounding thermoset or thermoplastic mount. In the preferred embodiment, the mold cylinder is demountable to a mold collar at an end remote from the closure member. A piston extends into the mold chamber through the collar and an alignment coupling joins the piston to a piston rod facilitating installation of the mold cylinder to the collar. The system provides a positive locking mold chamber with easy access and facilitates removal of the molded article by breaking the flashing from the article once molded.

Abstract: There is disclosed a chamfer device for use in the construction of concrete structures having chamferred edges. The chamfer device is adapted to be affixed to a support structure and the device is adapted to receive and support in a concrete sealing relationship the upright edge of a nominally sized two inch form of lumber.