Abstract: A folding mesh chair includes a seat and a backrest carried between opposite frame sides. The chair has an unfolded seating position in which the seat pivots to extend from the frame sides and bottoms of front and rear legs move apart, and a folded position in which the seat pivots toward the frame sides and the front and rear legs move together. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides.

Abstract: A folding mesh chair includes a seat and a backrest carried between opposite frame sides. The chair has an unfolded seating position in which the seat pivots to extend from the frame sides and bottoms of front and rear legs move apart, and a folded position in which the seat pivots toward the frame sides and the front and rear legs move together. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides.

Abstract: A folding and stacking chair system includes a plurality of folding and stacking chairs having an unfolded seating position in which the chairs are configured for sitting upon, and a folded and stacked position in which the chairs are folded and stacked together. Each chair has a seat and a backrest carried between opposite frame sides each with a backrest support, a front leg and a rear leg. The seat and the backrest each have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held between the backrest supports of the frame sides.

Abstract: An underlayment material includes a sheet of masticated rubber. A vapor barrier film is extruded onto the sheet of masticated rubber. In one embodiment, a portion of the vapor barrier film extends beyond at least one edge of the sheet of masticated rubber so as to form a flap extending therefrom. An elongated adhesive strip is disposed on a first side of the vapor barrier film. The elongated adhesive strip includes a removable cover film that protects the elongated adhesive strip until the cover film has been removed. The elongated adhesive strip is positioned so as to facilitate sealing of the flap extending from the vapor barrier film of a first unit of the underlayment material to the elongated adhesive strip of a second unit of the underlayment material.

Abstract: A chair seat for flexibly supporting the buttocks of a user seated thereon. The chair seat includes a seat surface having a pair of adjacent or side-by-side concentric corrugated regions formed therein, and which are configured for flexibly supporting the buttocks of the user by being deflectable with respect to the seat surface. The seat surface further includes a third corrugated region surrounding and concentric with the pair of side-by-side corrugated regions, and which third region is configured for flexibly supporting the hips and thighs of the user while also being deflectable with respect to the seat surface.

Abstract: A tamper resistant attachment apparatus for attaching a backrest to a chair frame. A flap is foldably coupled to an edge of a chair backrest. The flap is foldable over onto the backrest into a folded position. The flap has a channel that fits around a frame of a chair when the flap is in the folded position. At least one aperture that extends through the flap can receive a corresponding pin that is coupled to the backrest when the flap is in the folded position. The at least one pin is deformable to secure the flap and backrest around the chair frame when the flap is in the folded position.

Abstract: A chair foot device for a wire frame chair stackable with other wire frame chairs includes a lower surface disposable on a support surface. An upper surface, opposite the lower surface is sized and shaped to carry the lower surface of an adjacent foot from an adjacently stacked upper chair. The chair foot also includes an alignment protrusion disposed on one of the lower and upper surfaces and an alignment indentation disposed on the other of the lower and upper surfaces. The alignment protrusion is sized and shaped to be receivable within an alignment indentation of a corresponding foot from an adjacently stacked chair. The foot is sized and shaped to carry an applied load from an adjacently stacked upper foot and to transfer the applied load to an adjacent load bearing surface. The foot is also sized and shaped to protect the wire frame chair from damage during stacking.

Abstract: A message sign alert device including a housing having a planar message display window and a first visual alert window positioned on a periphery of the planar message display window. Within the housing are a message display section, a first visual alert section, and a control unit that operates the first visual alert section and the message display section for providing a visual attraction to the display of a message on the message display section. A planar display unit in the message display section includes a plurality of light emitting message elements and projects through the planar message display window at a substantially normal angle to the planar message display window. The first visual alert section has at least one light emitting element positioned adjacent to the first visual alert window for projecting through the first visual alert window at an oblique angle relative to the planar message display window.

Abstract: A locking mechanism for a support leg hingedly attached to a support surface includes a base, attached to the support surface, with a plurality of angularly spaced, radial teeth, and a coupler, attached to the support leg, having a plurality of angularly spaced, radial teeth configured to mate with the teeth of the base. A selectively releasable engagement mechanism is configured to engage and disengage the teeth of the base with the teeth of the coupler, to allow selective rotation of the support leg between an extended position and a folded position, and to lock the leg in the extended or folded position.

Abstract: A chair with a flexible resilient back support structure includes a hollow tubular seat frame, a hollow tubular backrest frame pivotally connected to the seat frame, and a limit stop affixed to the backrest frame or the seat frame adjacent to the pivot points. The limit stop is configured to limit a degree of rotation of the backrest frame between an upright position and a maximum backwardly rotated position. An elongate spring element extends from within the backrest frame into the seat frame, and is configured to bias the backrest frame in the upright position, and to resiliently resist backward rotation. In various embodiments, a cam surface is associated with the spring element, providing an effective fulcrum point which moves rearwardly as the backrest frame reclines, thereby increasing the effective flexural resistance of the spring element during reclining.

Abstract: A mullion arrangement for mounting within a door frame including a top fitting secured to an upper frame member or header of the door frame, a bottom fitting secured to the floor beneath the top fitting, and a mullion removably positioned between the top and bottom fittings. The mullion defines therein a cavity which carries cabling therein for supplying power to a component associated with the entryway, such as an electric strike for regulating opening of the door.

Abstract: A square skylight panel is vacuum-formed of light transmitting sheet plastic and has a lower peripheral flange which projects under roof shingles. The skylight panel covers a one-piece upper coupler member which is vacuum-formed of light transmitting sheet plastic and has an upper flange projecting under the skylight panel flange. A flexible and collapsible cylindrical tube has an upper end portion surrounding a lower wall portion of the upper coupler member and a lower end portion surrounding an upper wall portion of a similarly formed lower coupler member having a bottom flange received within a square frame attached to a ceiling and supporting a light diffusing ceiling panel. The skylight panel, upper and lower coupler members and ceiling panel define three dead air chambers providing for high thermal insulation, and the upper coupler member provides natural light into the attic between the roof and ceiling.

Abstract: A chair with a flexible resilient back support structure includes a hollow tubular seat frame, a hollow tubular backrest frame pivotally connected to the seat frame, and a limit stop affixed to the backrest frame or the seat frame adjacent to the pivot points. The limit stop is configured to limit a degree of rotation of the backrest frame between an upright position and a maximum backwardly rotated position. An elongate spring element extends from within the backrest frame into the seat frame, and is configured to bias the backrest frame in the upright position, and to resiliently resist backward rotation. In various embodiments, a cam surface is associated with the spring element, providing an effective fulcrum point which moves rearwardly as the backrest frame reclines, thereby increasing the effective flexural resistance of the spring element during reclining.

Abstract: An upholstered folding chair includes a chair frame, a base member permanently attached to the frame, and an upholstered insert configured to slide into and removably interlock with either the base member or the chair frame. The base member includes a retaining rim, which covers and protects at least some of the edges of the upholstered insert, and the base member and upholstered insert may have interlocking members which become hidden between the base and insert when the two are interlocked together. The base can be either a back base for receiving and supporting an upholstered chair back insert, or a seat base for receiving and supporting an upholstered chair seat insert.