235 results about "Joint compound" patented technology

A drywall finishing system for finishing 1) normal inside and outside corners of any angle, 2) stub wall or closet corners, 3) window wrap corners, and 4) L-metal for window sills and areas where drywall ends against some other surface like brick. The finishing system comprises a preformed trim piece comprising a semi-rigid member that is relatively thick in the center and tapers laterally to a thin edge. A layer of paper is bonded to the inside surface of the semi-rigid member for receiving joint compound to continuously bond the trim piece to the dry wall. A layer of finishing material is bonded to the exterior surface of the semi-rigid member. To install one of the pieces, it is selected from stock and cut to length. A flat coat of mud is applied to both sides of an exterior or interior angle, and the trim piece is placed over the mud and smoothed into place. Since it is preformed, the piece makes a straight line at the required angle. Once, the piece is in place, the edges are feathered once with a small amount of mud and a wide blade. At that point the corner is complete except for drying. It generally does not need to be sanded or touched up or at most, requires very little sanding or touching up. The finish material on the exterior surface can be directly textured or painted. Most of the intense labor associated with prior art methods is eliminated since none of the parts need to be coated with mud or sanded. In addition, the parts form straight, finished lines and angles as soon as they are installed.

A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a ready mixed joint compound composition wherein the amount of the cellulose ether in the joint compound composition is significantly reduced. When this joint compound composition is mixed with water and applied to a substrate, the water retention, sag resistance, and workability of the wet joint compound are comparable or improved as compared to when using conventional similar cellulose ethers.

A mud box includes a bottom surface with an outlet orifice, sides, a cover pivotally attached along one edge, and a handle attached to the cover for positioning the box on a surface and applying extruding pressure to the cover for ejecting material through the orifice. A spring assembly is attached to the box and connected to apply extruding pressure to the cover. A primary lock is coupled to the spring assembly and the box, the primary lock has a locked position in which the spring assembly is prevented from applying extruding pressure to the cover and an unlocked position in which the spring assembly applies extruding pressure to the cover. The primary lock is activated by a wheel assembly which moves it into the locked position when the box and wheel assembly are disengaged from a surface and which moves it into the unlocked position when the wheel assembly and box are engaged with a surface.

A junction box cover assembly for mounting a fixture on a wall or ceiling. The assembly includes an adapter plate for being mounted on a junction box. A patch for supporting the cover assembly on the wall or ceiling in a mounted condition is provided. The patch is adapted to rest flush against the wall or ceiling and to be covered by and embedded in a joint compound. A hub having a body is insertable through openings of the patch and the adapter plate. The assembly includes elements for securing the hub to the adapter plate and elements for securing the hub to the patch. An insert is attachable to the hub for mounting a fixture or providing a blank-up cover.

A dosage size multi-chambered, container having separate sealed compartments is provided and includes constituent materials for forming a wallboard joint compound. The container includes a first compartment containing a first mixture including calcined gypsum, a set preventer and water, and a second compartment sealed from the first compartment with a seal and containing a second mixture including a set initiator and water, wherein upon breaking of the seal, the first and second mixtures are combinable by kneading action to provide a dose of the wallboard joint compound.

Disclosed are aspects of board finishing systems. For example, in various aspects, disclosed are joint compound compositions, wall assemblies, methods of treating walls, and products related to any of the foregoing, including reinforcement trim, e.g., for protecting corners where boards meet, fasteners, and tape. The joint compound preferably is a drying type composition with reduced shrinkage property, and includes binder and hollow spheres, resulting in an ultra lightweight formulation in some embodiments. The joint compound composition can be applied in a one-coat treatment in preferred embodiments. Other aspects of board finishing system accommodate such a one-coat treatment to thusly allow a user to manipulate the compound closer to the plane of board as compared with conventional formulations. Joint tape and reinforcement trim can include non-swelling synthetic paper facing material in some embodiments.

The invention provides a composition useful as a joint compound comprising water, a filler comprising one or more of calcium carbonate, calcium sulfate dihydrate or calcium sulfate hemihydrate, a binder and / or a biocide, wherein the composition after curing is formaldehyde-free.

A jointing compound or plaster for construction elements, particularly paper-faced plasterboards. This plaster includes, in percentages by weight with respect to the total weight of plaster 50 to 85% of a mineral filler; 1 to 20% of an organic binder dispersible in an aqueous phase; 1 to 15% of a silicate-based agent other than the mineral filler; 0.2 to 5% of a hydrophobic agent which is a silicone derivative; 0.05 to 5% of polyvinyl alcohol; and water to make up to 100%. A method of producing a work such as a partition, a wall covering or a ceiling is also disclosed.

An acoustical panel for forming a monolithic ceiling or wall, the panel extending across a rectangular area, and having a core made primarily of gypsum, the core being essentially coextensive with the panel area such that it has two opposed sides, each of an area substantially equal to the area of the panel, the core having a multitude of perforations extending generally between its sides, the perforations being distributed substantially uniformly across the full area of the core and being open at both sides of the core, the face side of the core being covered by a porous layer, the perforations being optionally restricted at a rear side of the core, the porous layer at the face side of the core being suitable for adherence of drywall joint compound and a water-based non-blocking paint.

This method relates to making a joint compound that includes predispersing a dedusting agent in water to make a predispersed dedusting agent. Dry components, including at least one filler, are combined to make a dry mixture. Process water is pumped into a vessel and the predispersed dedusting agent is introduced to the vessel. The dry mixture is then added to the vessel and all components are blended to make a homogeneous product.

The present invention provides combined property, dual-action aqueous and dry compositions for application to a material, such as conventional Gypsum Wall Board, ceiling tiles, joint compounds, concrete and other interior building materials, prior to an exposure of the material to fire, or prior to, during or after exposure of the material to conditions favorable to the growth of microbes, and related methods. When compositions within the present invention are properly applied to a material prior to the material being exposed to fire, or prior to, during or after the material being exposed to conditions favorable to the growth of microbes, these compositions have the effect of reducing the amount of burning that occurs to the material, and / or reducing the amount or density of smoke and associated toxic gases produced by the material, when the material is exposed to fire. These compositions also have the effect of inhibiting or reducing the growth, build-up or deposit of microbes on the material when the material is exposed to conditions favorable to the growth of microbes.

The invention discloses a joint compound motion mechanical arm used for rehabilitation training of an upper limb. The mechanical arm comprises a base, an electric lifting column, a T type supporting frame, a main fixed base and an outer skeleton mechanical arm system, wherein the base is placed on the ground; the electric lifting column is fixedly connected with the base; the electric lifting column is fixedly connected with the T type supporting frame; the main fixed base is mounted on a supporting frame; the outer skeleton mechanical arm system is connected with driving motors through the main fixed base; and the driving motors are all mounted on the main fixed base. When the mechanical arm is in use, only the outer skeleton mechanical arm system moves according to a control instruction; the motors are motionless relative to the base; the mechanical arm is light, convenient and flexible, creative in structure, small in occupied space, and stable and reliable in movement; the joint compound motion mechanical arm can be used for assisting a patient with upper limb dyskinesia to finish all kinds of rehabilitation training actions; and meanwhile, the mechanical arm can be used for single-joint rehabilitation training for a shoulder joint and an elbow joint, and also can be used for compound motion rehabilitation training for multiple joints of the upper limb.

The present invention relates to drywall corner beads, particularly drywall corner beads having an outer paper layer, and paper therefor. The improved paperbead includes an elongated core having an outer surface. A paper strip is bonded to the outer surface of the core. The paper is impregnated on one side with a polymer, preferably latex, that penetrates only about half the thickness of the paper. The other side of the paper is roughened to improve adhesiveness to joint compounds. The latex impregnated side of the paper maintains increased strength making the paper resistant to scuffing while at the same time, the roughened side of the paper improves its adhesiveness to joint compounds.

A rigid faced foam cored panel system utilized to produce an insulating finishable surface in interior and exterior applications. The long edges of the rigid foam panels may be indented to form a recessed space for tapping, applying joint compound and assisting in achieving a level finished surface. The inside surface of the rigid foam panel may be radiant reflective with air spacers attached to the reflective surface to produce the needed air space for effective radiant heat reflection. The interior application may entail using the rigid foam panel both as insulation and as a finishable varied color painted or textured wall or ceiling surface. In exterior wall or other exposed surface applications the insulating rigid foam panel may be covered with moisture resistive coverings such as stucco style textures.

The present invention provides a low dusting joint compound comprising a filler, a binder, a thickener and one or more synthetic polymeric waxes that are at least slightly soluble in water and are solid at room temperature. Preferably the wax includes a high molecular weight polyethylene glycol or methoxy polyethylene glycol having an average melting point of from about 80.degree. F. (27.degree. F.) to about 150.degree. F. (80.degree. C.). These additives impart low dusting properties without a sticky or oily feel. High molecular weight synthetic waxes also act as an internal binder to hold the joint compound together and improves paint gloss retention. The invention results in a joint compound with improved properties for drywall finishing.

Disclosed are aspects of board finishing systems. For example, in various aspects, disclosed are joint compound compositions, wall assemblies, methods of treating walls, and products related to any of the foregoing, including reinforcement trim, e.g., for protecting corners where boards meet, fasteners, and tape. The joint compound preferably is a drying type composition with reduced shrinkage property, and includes binder and hollow spheres, resulting in an ultra lightweight formulation in some embodiments. The joint compound composition can be applied in a one-coat treatment in preferred embodiments. Other aspects of board finishing system accommodate such a one-coat treatment to thusly allow a user to manipulate the compound closer to the plane of board as compared with conventional formulations. Joint tape and reinforcement trim can include non-swelling synthetic paper facing material in some embodiments.

A drywall finishing system for finishing normal inside and outside corners of any angle. The finishing system comprises a preformed trim piece comprising a semi-rigid member that is relatively thick in the center and tapers laterally to a thin edge or is stepped forming a thick and thin portion. A layer of fibrous can be bonded to the inside surface of the semi-rigid member for receiving joint compound to continuously bond the trim piece to the dry wall. A layer of finishing material can be bonded to the exterior surface of the semi-rigid member. The finishing system can be attached to a wall with fasteners such as nails.

Drywall tapes, drywall joints and methods for their construction are provided by this invention. The drywall tape of this invention includes a web of glass fibers and a coating disposed over a portion of the glass fibers. The coating includes a resinous binder which is at least partially soluble or dispersible in joint compound. The resinous binder is capable of forming an adhesive bond with the joint compound when set.

Disclosed are aspects of board finishing systems. For example, in various aspects, disclosed are joint compound compositions, wall assemblies, methods of treating walls, and products related to any of the foregoing, including reinforcement trim, e.g., for protecting corners where boards meet, fasteners, and tape. The joint compound preferably is a drying type composition with reduced shrinkage property, and includes binder and hollow spheres, resulting in an ultra lightweight formulation in some embodiments. The joint compound composition can be applied in a one-coat treatment in preferred embodiments. Other aspects of board finishing system accommodate such a one-coat treatment to thusly allow a user to manipulate the compound closer to the plane of board as compared with conventional formulations. Joint tape and reinforcement trim can include non-swelling synthetic paper facing material in some embodiments.

A drywall sealing tape which includes a substrate layer and a mesh layer made of mesh filament. The mesh layer is an array of filaments formed together which, when adjacent the substrate, create an inter-filament cavity for receiving and retaining joint compound between the substrate and the drywall panel. In use, the drywall sealing tape of the present invention may be coated with joint compound and applied to a drywall panel. The inter-filament cavities retain a volume of joint compound corresponding to the approximate thickness of the mesh filament. The joint compound retained within the cavities serves to bond the drywall sealing tape of the present invention to the drywall panels, and provides a seamless, crack-resistant surface.

Low density joint compounds, and methods for their use are disclosed. Joint compounds comprising water, calcium carbonate, a foaming agent, and a rheology modification agent contain a plurality of stable air bubbles. Joint compounds can have densities of about 4 pounds per gallon to about 8 pounds per gallon. A presently prepared composition has a density of about 4.8 pounds per gallon. A presently preferred foaming agent is a polyether siloxane copolymer. A presently preferred rheology modification agent is poly(ethylene oxide). The joint compounds can comprise additional components such as perlite, mica, talc, preservatives, and latex.

The invention pertains to a drywall tape having a nonwoven fabric and a reinforcing scrim, wherein the nonwoven fabric has chopped glass fibers laid flat in the nonwoven fabric, the fibers being substantially straight, random laid and bonded to one another to resist forces exerted in random directions, and the reinforcement scrim has elongated reinforcing strands of low profile thickness joined against a side of the nonwoven fabric, such that the scrim and the nonwoven fabric reinforce each other, and reinforce a joint compound in which the drywall tape is imbedded.

The corner bead of the present invention includes an elongated strip of metal material with a central arcuate nose and a pair of flanges extending outwardly from the nose. A paper strip is bonded only to the outward faces of each of the flanges, with a wing portion extending beyond the outer edge of each flange. Each paper strip begins proximal to, but does not cover the nose, such that the nose is exposed after installation of the corner bead on a wallboard corner. The paper strips are applied only to the outward face of each flange. In the method of the invention, a tape-on corner bead is provided with paper strips bonded only to the outer face of the flanges of the core strip, with portions of the strips overhanging the outer edges of the flanges to form wings. A layer of joint compound is applied to a wallboard corner, and the corner bead is applied, with the inward faces of the flanges and the wings in direct contact with the joint compound. A finish layer of joint compound is then applied over the outward face of the paper strips, extending from the nose of the corner bead and feathered onto the wallboard, leaving the nose of the corner bead exposed.

The invention discloses a multipath flexible piece two-joint compound robot finger device and belongs to the technical field of human simulating manipulators. The multipath flexible piece two-joint compound robot finger device comprises a base, a motor, a speed reducer, a base shaft, a near joint shaft, a middle finger section, a remote joint shaft, a tail end finger section, a multipath transmission mechanism and a spring piece. In the device, by the single motor, the multi-shaft and multipath transmission mechanism with a different transmission ratio, the spring piece and the like, a compound underactuated catching effect is comprehensively achieved; the finger rotatably moves to an object in a coupled way and adaptively catches the object; the catching process stimulates the operation of a human, the action is flexible, and the object is caught stably; furthermore, the robot finger device can automatically and adaptively catch objects with different sizes and shapes, has low requirement on a control system, a simple and compact structure, high transmission efficiency, low cost, and an appearance similar to that of a human finger, and is easy to operate, and convenient to assemble and maintain, and is low in energy loss, and applicable to the human- manipulator at the same time.

The invention is directed to a joint tape for finishing a joint between boards comprising a nonwoven substrate that does not swell substantially in the presence of water. The invention further provides a method of finishing a joint between boards comprising (i) applying a joint tape of the invention to a joint between boards by embedding the joint tape in a first coat of joint compound, (ii) applying a second coat of joint compound over the tape, wherein step (ii) is carried out before the joint tape and joint compound applied in step (i) have substantially dried, and optionally (iii) applying a third fill or finish coat of joint compound over the tape, wherein step (iii) is carried out before the joint tape and second coat have substantially dried.

CMC with CMDS greater than or equal to 0.76, optionally with a non-ionic co-thickener or a CMC with CMDS less than 0.75 is used as both the rheology modifier and partial clay substitute in tape joint compounds. This significant reduction of clay level is sufficient to eliminate most of the negative characteristics of clay in joint compound.

A kit for assembling walls and ceilings is provided. The kit comprises at least two gypsum boards, each with at least one tapered edge, and a self-drying joint compound comprising a polymeric binder and hollow spheres. Methods for wall and ceiling installation are provided as well.

A wet / dry vacuum assembly is described which includes a powerhead assembly capable of removable attachment to the open upper end of a container, the powerhead assembly including a housing, a motor, a fan, and air inlet, and an air exhaust port; and, a container having an open upper end, a closed lower end, and at least one sidewall there between, the container including a continuous handle member for carrying the container in a suspended position. Also described are water filter attachments having particle diffusing means formed therein, for use with the wet / dry to vacuum assembly for use in dust control when the vacuum assembly is used for vacuuming up fine particulate dust, such as dust generated from sanding drywall joint compound.

A flexible setting type hydraulic joint compound and a method of forming flexible joints. The flexible joint compound of this invention primarily contains 2 to 20 parts by weight of an emulsion polymer having a Tg that is less than about −40° C., and 22 to 44 parts by weight of total water, based on 100 parts by weight calcium sulfate hemihydrate filler. It can be applied to joints between two adjacent sheets of gypsum board to form a flexible joint that is resistant to cracking.