Drywall trim piece
OwnerFrederick J. Robertsoninventor
Life of this patent
Estimating the term…
Abstract
A trim piece for installing at a drywall external right angle corner which is provided with a bullnose corner bead includes an intermediate portion which wraps over the convexly curved portion of the bullnose corner bead and has two edges extending parallel to the edges of the flanges of the corner bead. Two leaves are attached to the intermediate portion of the trim piece at the two edges respectively. The intermediate portion of the trim piece has an interior surface at a first end matching closely the exterior surface of the corner bead and an exterior surface which is convexly curved at the first end and is right-angled at the opposite second end and provides a transition from the convex curve to the right angle between the first and second ends.
Claims15
A trim piece for installing at a drywall external right angle corner at which two drywall boards meet and which is provided with a bullnose corner bead having first and second flanges extending over the two drywall boards respectively and a convexly curved portion joining the first and second flanges, the first and second flanges having respective mutually parallel free edges, said trim piece comprising:
- an intermediate portion which wraps over the convexly curved portion of the bullnose corner bead and has first and second edges extending parallel to the edges of the flanges of the corner bead and also has two opposite ends,
- first and second leaves attached to the intermediate portion of the trim piece at the first and second edges respectively, and
- first and second pins projecting from the first and second leaves respectively, the first and second pins being located so that when the trim piece is placed over the corner bead and the leaves are forced against the flanges of the corner bead, the pins are driven into the drywall boards and a flank of each pin bears firmly against a free edge of a flange of the corner bead, whereby the trim piece is held in position relative to the corner bead,
- and the intermediate portion of the trim piece including a transition region having a first end at one end of the intermediate portion and a second end spaced from the first end, the transition region having an interior surface at said first end matching closely the exterior surface of the corner bead at said first end and an exterior surface which is convexly curved at said first end and is right-angled at said second end and provides a transition from the convex curve to the right angle between said first and second ends.
A trim piece for installing at a drywall external right angle corner at which two drywall boards meet and which is provided with a bullnose corner bead having first and second flanges extending over the two drywall boards respectively and a convexly curved portion joining the first and second flanges, the first and second flanges having respective mutually parallel free edges, said trim piece comprising:
- an intermediate portion which wraps over the convexly curved portion of the bullnose corner bead and has first and second edges extending parallel to the edges of the flanges of the corner bead and also has two opposite ends, and
- first and second leaves attached to the intermediate portion of the trim piece at the first and second edges respectively,
- and the intermediate portion of the trim piece including a transition region having a first end at one end of the intermediate portion and a second end spaced from the first end, the transition region having an interior surface at said first end matching closely the exterior surface of the corner bead at said first end and an exterior surface which is convexly curved at said first end and is right-angled at said second end and provides a transition from the convex curve to the right angle between said first and second ends.
A method of finishing a drywall external right angle corner defined by two drywall boards and provided with a bullnose corner bead mounted at the corner and having first and second flanges that extend over the two drywall boards respectively and have respective mutually parallel free edges, and a convexly curved portion joining the first and second flanges, said method comprising:
- providing a trim piece comprising an intermediate portion having first and second parallel edges and two opposite ends, the intermediate portion including a transition region having a first end at one end of the intermediate portion and a second end spaced from the first end, and the transition region having an interior surface at said first end matching closely the exterior surface of the corner bead at said first end and an exterior surface which is convexly curved at said first end and is right-angled at said second end and provides a transition from the convex curve to the right angle between said first and second ends, and
- mounting the trim piece at a lower end of the corner with the intermediate portion of the trim piece wrapping over the convexly curved portion of the bullnose corner bead and the first and second edges of said intermediate portion extending parallel to the free edges of the flanges of the corner bead.
Dependencies are inferred from the claim text.