Abstract: A drywall joint tool includes a housing with upper and lower surfaces and an interior. A drivetrain is mounted in said interior and originates at a drive input shaft. The drivetrain reduces the rotational speed and increases the torque force from the drive input shaft to multiple rollers depending downwardly from the housing lower surface. A guide fence also depends downwardly from the housing lower surface and includes a guide wall. The spacing between the guide rollers in the guide wall correspondence to nominal and compressed thicknesses of a gypsum board panel along a cut edge traversed by the tool. In an alternative embodiment, four guide rollers are provided.

Abstract: An acoustical building panel is disclosed that comprises a fibrous panel comprising: a central portion having a first major surface; a perimeter portion surrounding the central portion; a recess press-formed into the perimeter portion, the recess circumscribing the first major surface and comprising a recess floor surface; a second major surface opposite the first major surface; and side edge surfaces that define a perimeter of the fibrous panel and extend from the second major surface to the recess floor surface.

Abstract: Embodiments of a system and a method for measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A compression assembly can be used to compressively engage the cementitious board in a controlled manner as it passes by the compression member along the conveyor between the forming station and the cutting station. A force gauge can be associated with the compression member to measure the resistance force exerted by the cementitious board in response to being compressed by the compression member. The resistance force can be correlated to a set characteristic of the cementitious board, such as a numerical value of percent hydration of the cementitious slurry of that particular portion of the cementitious board.

Abstract: The invention relates to a method for producing a plaster board having the steps: —provision of a conveyor belt apparatus having a carrying belt, —application of a first sheath to the carrying belt, —application of a plaster slurry to the first sheath to form a plaster coat and —application of a second sheath to the applied plaster slurry to form a plaster layer comprising first sheath, plaster layer and second sheath, —levelling of the plaster layer with a levelling bar or a levelling roller, wherein the amount V(t) of the plaster slurry introduced between the first sheath and the second sheath is reduced at a predefined clock frequency f over a predefined time period t? compared to a target amount VV.

Abstract: This forming device is intended to be mounted on a flight (6) of a conveyor for transporting a fibrous product through a heating device, where the flight (6) defines a receiving surface (63) for the fibrous product. The forming device has a forming block (8), a main part (81) of which is intended to be arranged at the front of the receiving surface (63), and at least one anchoring element (9) which is intended to be fixed to the flight by being arranged at the rear of the receiving surface (63).

Abstract: The exterior-wall structure comprises two or more kinds of exterior panels. The two or more kinds of exterior panels have the same outline shape, the same dimensions, and the same surface texture, and, the two or more kinds of exterior panels have respectively a different number, including zero, of grooves on each surface. Each groove runs an entire length of each exterior panel continuously in a longitudinal direction of the exterior panel. The two or more kinds of exterior panels are arranged side by side to form an exterior-wall surface.

Abstract: Aspects of this disclosure relate to a method of manufacturing wallboard which includes providing a first layer of facing material, creasing the first layer facing material intermittently to create a series of creased portions, providing a gypsum slurry on the first layer of facing material and providing a second layer of facing material over the gypsum slurry. Further, creasing the first layer of facing material intermittently can include intermittently creasing the first layer of facing material in a substantially linear fashion extending in a first direction of the first layer of facing material so that the first layer of facing material exhibits a linear series of creased portions extending in the first direction of the first layer of facing material and a series of portions that are not creased extending in the first direction of the first layer of facing material.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: Aspects of this disclosure relate to a method of manufacturing wallboard which includes providing a first layer of facing material, creasing the first layer facing material intermittently to create a series of creased portions, providing a gypsum slurry on the first layer of facing material and providing a second layer of facing material over the gypsum slurry. Further, creasing the first layer of facing material intermittently can include intermittently creasing the first layer of facing material in a substantially linear fashion extending in a first direction of the first layer of facing material so that the first layer of facing material exhibits a linear series of creased portions extending in the first direction of the first layer of facing material and a series of portions that are not creased extending in the first direction of the first layer of facing material.

Abstract: Aspects of this disclosure relate to a method of manufacturing wallboard which includes providing a first layer of facing material, creasing the first layer facing material intermittently to create a series of creased portions, providing a gypsum slurry on the first layer of facing material and providing a second layer of facing material over the gypsum slurry. Further, creasing the first layer of facing material intermittently can include intermittently creasing the first layer of facing material in a substantially linear fashion extending in a first direction of the first layer of facing material so that the first layer of facing material exhibits a linear series of creased portions extending in the first direction of the first layer of facing material and a series of portions that are not creased extending in the first direction of the first layer of facing material.

Abstract: A vibrating flexible smoothing sheet or shroud disposed transversely of a direction of travel of a formed fiber panel including gypsum-cementitious slurry and embedded chopped fibers. The sheet is used to smooth the surface of the panel as it exits a fiber embedment station of a structural cementitious panel production line to remove grooves and other non-uniform surface imperfections to reduce the need for costly finishing after the panels are cured and cut to size. The flexible sheet is designed to float over the surface of the formed panel without tearing or otherwise damaging the surface of the heavily fiber reinforced surface layers of the panel. The vibrating sheet is pivotally mounted on the side dams of the web production line so it can float over the panel surface during use, but be raised off the line when not in use.

Abstract: Here disclosed is a method of manufacturing a plasma display device in which a panel is easily separated from a holding plate if the separation is required. In the method of manufacturing a plasma display device having a panel, in which a pair of substrates having transparency at least on the front side is oppositely disposed so that discharge space and discharge cells are formed between the substrates, and a metallic holding plate that supports the panel via a thermal conductive member, the present invention employs a thermal conductive member made of a pull-to-remove adhesive. The adhesive is applied to the panel or the holding plate, and the panel and the holding plate are put together. After that, the adhesive is cured by application of pressure and heat.

Abstract: Introduction guides 12 are provided above and below a sheet-introduction opening portion of a pressure-reduced chamber 10, and heating means 17 is provided between the introduction guides. Each resin sheet 3 is attracted and attached respectively to the circumferential surface of a corresponding emboss roller 11 by reducing pressure. Pins 112 of the emboss roller 11 are truncated cone-shaped. The ratio of the total area of the lower bases of the pins 112 to the area of the circumferential surface of the emboss roller is 0.5 or more. The rising angle ? of the pin side face, in the vertical plane including the central axis of the pins 112, is in the range from 50 degrees to 70 degrees. Furthermore, a multilayered hollow structure plate 140 is formed by attaching non-air-permeable sheets 130 onto both the front and back of a core member obtained by fusing together hollow protrusions 112 in two thermoplastic resin sheets.

Abstract: A system and method of making a plaster panel to use in the construction of a wall of a building in a relatively faster, easier, more efficient, and more precise manner for either interior or exterior walls is disclosed. The created plaster panels may include a slab of cementitious composition including a mixture of sizes of cut expanded polystyrene, a quantity of monofilament fiber, and a binding agent. At least one layer of a mesh may surround the slab, wherein the resulting panel is light in weight, flexible and strong. Such panels may be fixed in place to a building frame by suitable fasteners such as nails or screws, while causing little or no fracturing of the panel.

Abstract: A process and apparatus for forming wallboard panels having recessed edges along all four edges which process involves passing an unfinished length of wall board through a lateral recess forming apparatus.

Abstract: A vibrating flexible smoothing sheet or shroud disposed transversely of a direction of travel of a formed fiber panel including gypsum-cementitious slurry and embedded chopped fibers. The sheet is used to smooth the surface of the panel as it exits a fiber embedment station of a structural cementitious panel production line to remove grooves and other non-uniform surface imperfections to reduce the need for costly finishing after the panels are cured and cut to size. The flexible sheet is designed to float over the surface of the formed panel without tearing or otherwise damaging the surface of the heavily fiber reinforced surface layers of the panel. The vibrating sheet is pivotally mounted on the side dams of the web production line so it can float over the panel surface during use, but be raised off the line when not in use.

Abstract: Aspects of this disclosure relate to a method of manufacturing wallboard which includes providing a first layer of facing material, creasing the first layer facing material intermittently to create a series of creased portions, providing a gypsum slurry on the first layer of facing material and providing a second layer of facing material over the gypsum slurry. Further, creasing the first layer of facing material intermittently can include intermittently creasing the first layer of facing material in a substantially linear fashion extending in a first direction of the first layer of facing material so that the first layer of facing material exhibits a linear series of creased portions extending in the first direction of the first layer of facing material and a series of portions that are not creased extending in the first direction of the first layer of facing material.

Abstract: A production line for producing sheets based on hydraulic binder, the production line including in an upstream zone of the production line, marking device for marking a facing material of the preform with a mark; in a downstream zone of the production line, detecting device for detecting the mark made by the marking device; a cutting device; and an actuating device for actuating said cutting device after receiving a detection signal from the detection device.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: A method for producing plaster plates (44), according to which two fine cardboard-covered sheets of paper (8, 9) enclose a plaster-based hydraulic binder (10) in a shaping device (13), creating a composite band (45) that is hardened on one or several hardening bands (14, 15), the edges of said hardening bands (14, 15) being provided with two bands used for tapering in the horizontal direction.

Abstract: A method enables gypsum/fiber board to be manufactured such that recessed areas are formed on the same face of the cut wallboard on all four edges without interrupting the production line. The system accommodates different lengths of cut wallboard as the lateral cut edge recess forming apparatus is adjustable in width to accommodate different lengths of cut wallboard.

Abstract: A reactivatable adhesive that may be used on high speed case and carton sealing lines contains an energy absorbing ingredient that is capable of reactivating upon exposure to ultrasonic energy.

Abstract: The present invention comprises apparatus for the manufacture improved structural panel with synthetic ingredients, such as vermiculite and fibers. The improved structural panel achieves enhanced lateral and surface integrity by the use of fibers within the core of the structural panel and adhesives and smooth materials (such as foil) as a surface coating. The apparatus is particularly suited for manufacture of the structural panel at low cost and high efficiency.

Abstract: Particle boards having at least one surface made of a resin impregnated paper web are provided during their production with a surface structure due to the fact that a glass sphere blasted surface structure is provided for in the pressing surface of a double band press.

Abstract: The invention is directed to an apparatus for the production of plate-sha bodies from a mixture of plaster and fibrous materials. The apparatus has a conveying means, spreading means, a first and second press, an afterwetting station and a setting and drying station. The afterwetting station is located between the first press and the second press and has separate means for wetting the upper side and the underside of a raw board being processed. The separate wetting means can be independently controlled.

Abstract: A method for making gypsum wall board in which during the production of the board pressure is applied to a portion or all of the board surface to reshape, compress and densify the gypsum core to change the shape or contour the face surface of the gypsum board. The pressure must be applied in a systematic fashion to avoid creating lateral shifting or shear stresses in the gypsum core or between the core and paper surface to avoid destroying the paper to gypsum core band. The method can be used to product a cross taper at the cut ends of the board, to produce a decoratively shaped board surface and to densify the entire board core for special gypsum board applications.

Abstract: A cement board of homogeneous composition from face to face and having a substantially uniform thickness is made continuously by distributing a sole cementitious composition on a moving carrier sheet and smoothing the surface by rotating a cylindrical roller in a direction counter to the movement of the carrier sheet. An upper reinforcing network is submerged under the surface by feeding it under the counter rotating roller.