Screed

Static structures (e.g. – buildings) – Installed screed or unit with specified feature retaining... – Position adjusting means

Reexamination Certificate

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Reexamination Certificate

active

06279282

ABSTRACT:

TECHNICAL FILED
This invention relates generally to the construction of wall product and ceiling structures, and in particular to a screed that provides a truly planar surface, in vertical and horizontal and other orientations, for the constructed wall product that is formed.
BACKGROUND TO THE INVENTOIN
In a traditional method of plastering a wall product, ceiling, or floor, without the placing of tiles on the wall product thereafter, wooden float strips are used to guide a straight edge across an area forming the wall product being plastered, while raking off excess mud, etc., left in the application of the mud. The float strips, or “screeds” are tapped into the prepared or wet mud, such as mortar, cement, or other suitable materials, with a separate level held against one or more of them to obtain a horizontal, vertical, or other orientation or plum. The float strips, straight edge, and the board carrying the mud itself, are usually wet before use so that they won't draw moisture out of the prepared mud. It is important that the float strips themselves are straight and plumbed as much as possible, for the purpose of keeping the finished wall product or ceiling surfaces as straight as possible, however, a true planar wall surface is not generated with the traditional tools, and much is left up to the individual craftsman or novice.
BACKGROUND ART
Prior art known to the inventor is found in the following U.S. Pat. Nos. 1,762,254; 2,025,576; 3,494,090; 3,841,046; 4,073,593; 4,785,601; 4,945,698; 5,363,619; and 5,630,297. Also, the book “Ceramic Tile Setting” authored by John P. Bridge, published by TAB Books, a Division of McGraw-Hill, Inc. (1992).
SUMMARY OF THE INVENTION
The invention is embraced within an article, referred to herein at times as a screed device, and in a method of its use for constructing a wall product and its planar surface, formed of coatings or layers of plaster, mortar, cement, or a combination of these or other suitable construction materials. The screed device is an elongated member in which spaced freely rotatable screws extend through the entirety or thickness of the member, for affixing to a stud forming the skeleton or framing of a wall, ceiling, or the like, and to which tar paper, lath, and wet mud are applied. A pair of bushings or linings, one outside the other, are mounted about and circumscribe the neck of each screw which nevertheless is free to rotate within the outer bushing. The inner bushing is affixed to the neck of the screw while the outer bushing is affixed to the member. A lock washer is mounted in an annular groove in the neck of the screw, abutting a back side or surface of the member, and retains the freely rotatable screw within and throughout the thickness of the member.
In the application of a pair of screed devices, as applied in the formation of a wall product, after tar paper and its lath have been mounted and affixed to adjoining spaced studs (not necessarily immediately next to one another), the screws of each of a pair of them are threaded to its corresponding stud, and each of the devices is plumbed true, vertically or horizontally, by an included level or by another level applied to the screed device. The noted coatings are applied to the apron of the lath and the tar paper, between the adjoining studs, to a depth measured to the front surface of or to points or lines of tangencies with the screeds which have been plumbed true and which are held secure to their studs by the screws. A straight edge is utilized to remove excess mud that has been applied between the screeds to form the wall product. The finish surface of the constructed wall product is truly plumbed, whether it be in a finished vertically-oriented, horizontally-oriented, or other oriented wall product or in a finished ceiling wall product.
An object of this invention is to provide a novel screed device.
Another object of this invention is to provide truly plumbed surfaces of a wall product, ceiling, or floor.
A yet further object of the invention is to reduce in a significant fashion the amount of time consumed in constructing a wall product, vis-a-vis traditional or conventional ways and time taken to do so with conventional or known screeds.
A still further object of the invention is to provide a considerable savings in the amount of time required to form a wall product or ceiling with the device of this invention, thus reducing the laborious effort with its time to build the wall product or ceiling, which heretofore has been more extensive than in the case with this inventive device.
Another object of this invention is to provide a competitive position for doing the work because of the application of the device of this invention compared to the labor and cost involved using a conventional or known screed.
Yet a further object of the invention is to reduce the cost of construction of a wall product or ceiling produced by the utilization of screed devices.


REFERENCES:
patent: 1568375 (1926-01-01), Gillett
patent: 2197278 (1940-04-01), Sverdahl
patent: 2990652 (1961-07-01), Santoro
patent: 3127703 (1964-04-01), Eshelman
patent: 4360993 (1982-11-01), Tomokazu et al.
patent: 4945698 (1990-08-01), Jertberg et al.

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