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AssigneeTrim-Tex, Inc.
InventorsJoseph M. Koenig JR., Mark Budzik
Estimating the term…
As extruded from a polymeric material, such as polyvinyl chloride, a drywall-trimming strip has a central portion, which has a bullnose region and two planar regions, one at each side of the bullnose portion. Further, the drywall-trimming strip has two lateral flanges, each of which is joined unitarily to the bullnose portion by a stepped junction. The bullnose region has an exterior radius of 0.350 inch approximately. Each planar region has a width of 0.217 inch approximately, as measured in a plane normal to an axis defined by the bullnose region. Each junction has a measurement of 0.095 approximately, as measured between a plane defined by the exterior surface of the bullnose portion and a plane defined by the interior surface of the flange at such junction. Having a thickness of 0.055 inch approximately, the strip is adapted to fit along an elongate corner defined by two drywall panels, each of which has a thickness not less than 0.5 inch approximately and each of which is disposed against an interior surface of one of the lateral flanges, while permitting a first panel to abut or to be closely spaced from a second panel without requiring the second of panel to be set back from a plane defined by an outer surface of the first panel, by a distance larger then 0.091 inch approximately, so as to avoid interference with the bullnose portion.
A drywall-trimming strip useful with first and second drywall panels, each of which has a thickness X not less than about 0.5 inch and which are disposed at an angle relative to each other and in an abutting or closely spaced relationship to define an elongate corner, along which the second drywall panel overlaps an end of the first drywall panel through a distance Ov, where Ov is up to X—0.091 inch,
Dependencies are inferred from the claim text.
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Bases for plaster: edge-protecting borders
Edge-protecting borders: for corners
Finishing work on buildings
Term end not estimated
This invention pertains to improvements in a drywall-trimming strip of a type extruded from a polymeric material, such as polyvinyl chloride, and having a central portion having a bullnose region and two lateral flanges, each being joined unitarily to the central portion by a stepped junction.
Conventionally, in the United States, a drywall panel has a thickness of 0.5 inch approximately or a thickness of 0.625 inch approximately. Heretofore, drywall-trimming strips of the type noted above have been used widely in residential and commercial buildings and have been available commercially from Trim-Tex, Inc. of Lincolnwood, Ill., and from other sources. Commonly, as known heretofore, the central portion of such a strip has a bullnose profile having an exterior radius of not less than 0.75 inch approximately, which radius continues to the stepped junction joining each of the lateral flanges to the central portion.
When a drywall-trimming strip, as described in the preceding paragraph, is fitted along an elongate corner defined by two drywall panels, which may be conveniently called a first panel and a second panel, so that each of the drywall panels is disposed against an interior surface of one of the lateral flanges, and so that the first panel approximately butts against the second panel, the second panel is required to be set back from a plane defined by an outer surface of the first panel, by a sufficient distance to avoid interference between the second panel and the bullnose portion of the drywall-trimming strip.
FIG. 1 is a perspective view of a drywall-trimming strip constituting a preferred embodiment of this invention.
FIG. 2 is a profile view of the drywall-trimming strip shown in FIG. 1, as combined with two drywall panels in a manner contemplated by this invention, whereby one drywall panel is set back by a minimal distance.
As shown in FIGS. 1 and 2, a drywall-trimming strip 10 is a one-piece extrusion of a polymeric material, such as polyvinyl chloride, which is preferred. The drywall-trimming strip 10 has a central portion 20 and two lateral flanges 30. The central portion 20 has an exterior surface 22 and an interior surface 24 and each lateral flange 30 has an exterior surface 32 and an interior surface 34. Each lateral flange 30 has an array of circular holes, elongate slots, or other apertures, such as the circular holes 36 shown in broken lines in FIG. 1.
As novel features of this invention, the central portion 20 has a bullnose region 26 and two planar regions 28, one at each side of the bullnose region 26. Each lateral flange 30 is joined unitarily to one of the planar regions 28 of the central portion 20, by a stepped junction 40.
As shown in FIG. 2, the drywall-trimming strip 10 is fitted along an elongate corner C defined by a first drywall panel 50 and a second drywall panel 60. The elongate corner C may be a vertical, inclined, or horizontal corner. Each of the drywall panels 50, 60, may have a thickness of 0.5 inch approximately, a thickness of 0.625 inch approximately, or some other thickness not less than approximately 0.5 inch.