U.S. patent application number 11/271622 was filed with the patent office on 2007-05-17 for corner bead having a reinforcing member.
Invention is credited to John S. Conboy.
Application Number | 20070107336 11/271622 |
Document ID | / |
Family ID | 38039299 |
Filed Date | 2007-05-17 |
United States Patent
Application |
20070107336 |
Kind Code |
A1 |
Conboy; John S. |
May 17, 2007 |
Corner bead having a reinforcing member
Abstract
A corner bead for joining adjacent pieces of wallboard including
an arched center section having a pair of wing sections attached
thereto. The arched center section extends outwardly above planes
defined by the wing sections, and the wings and arched center
section define an interior surface which is placed adjacent the
wallboard and an exterior surface which is placed opposite the
wallboard. A reinforcing member is disposed adjacent the interior
surface of the arched center section and attached thereto to
provide rigidity to the arched center section.
Inventors: |
Conboy; John S.;
(Chesterfield, MO) |
Correspondence
Address: |
POLSTER, LIEDER, WOODRUFF & LUCCHESI
12412 POWERSCOURT DRIVE SUITE 200
ST. LOUIS
MO
63131-3615
US
|
Family ID: |
38039299 |
Appl. No.: |
11/271622 |
Filed: |
November 12, 2005 |
Current U.S.
Class: |
52/255 |
Current CPC
Class: |
E04F 2013/063 20130101;
E04F 19/028 20130101; E04F 2013/061 20130101; E04F 13/06
20130101 |
Class at
Publication: |
052/255 |
International
Class: |
E04B 1/00 20060101
E04B001/00 |
Claims
1. A corner bead for joining adjacent pieces of wallboard
comprising: an arched center section having a pair of wing sections
attached thereto, the arched center section extending outwardly
above planes defined by the wing sections, the wings and arched
center section defining an interior surface which is placed
adjacent the wallboard and an exterior surface which is placed
opposite the wallboard; and a reinforcing member disposed adjacent
the interior surface of the arched center section and attached
thereto to provide rigidity to the arched center section.
2. The corner bead of claim 1 wherein the reinforcing member is
tempered wire.
3. The corner bead of claim 2 including an adhesive retaining the
wire to the interior surface of the arched center section.
4. The corner bead of claim 1 wherein the reinforcing member is a
polyamide hot melt glue.
5. The corner bead of claim 1 wherein the material is a flexible
polymeric material.
6. The corner bead of claim 1 wherein the wings are covered with a
plurality of discrete fibers.
7. The corner bead of claim 1 further defining a plurality of
triangular cutouts in the wings that allow the corner bead to
follow nonlinear intersections of wallboard.
8. The corner bead of claim 7 further comprising tear strips
adjacent the triangular cutouts.
9. A corner bead for joining adjacent pieces of wallboard
comprising: an arched center section having a pair of wing sections
attached thereto, the arched center section extending outwardly
above planes defined by the wing sections, the wings and arched
center section defining an interior surface which is placed
adjacent the wallboard and an exterior surface which is placed
opposite the wallboard, wherein both the interior and exterior
surface of the wings comprise a plurality of discrete fibers; and a
reinforcing member disposed adjacent the interior surface of the
arched center section and attached thereto to provide rigidity to
the arched center section.
10. The corner bead of claim 8 wherein the reinforcing member is,
tempered wire.
11. The corner bead of claim 10 including an adhesive retaining the
wire to the interior surface of the arched center section.
12. The corner bead of claim 9 wherein the reinforcing member is a
polyamide hot melt glue.
13. The corner bead of claim 9 wherein the material is a flexible
polymeric material.
14. The corner bead of claim 9 further defining a plurality of
triangular cutouts in the wings that allow the corner bead to
follow nonlinear intersections of wallboard.
15. The corner bead of claim 14 further comprising tear strips
adjacent the triangular cutouts.
16. A corner bead for joining adjacent pieces of wallboard
comprising: an arched center section having a pair of wing sections
attached thereto, the arched center section extending outwardly
above planes defined by the wing sections, the wings and arched
center section defining an interior surface which is placed
adjacent the wallboard and an exterior surface which is placed
opposite the wallboard; and a tempered wire reinforcing member
disposed adjacent the interior surface of the arched center section
and attached thereto to provide rigidity to the arched center
section.
17. The corner bead of claim 16 wherein the material is a flexible
polymeric material.
18. The corner bead of claim 16 wherein the wings are covered with
a plurality of discrete fibers.
19. The corner bead of claim 16 further defining a plurality of
triangular cutouts in the wings that allow the corner bead to
follow nonlinear intersections of wallboard.
20. The corner bead of claim 19 further comprising tear strips
adjacent the triangular cutouts.
Description
FIELD OF THE INVENTION
[0001] This invention relates to wallboard comer bead and
particularly to a wallboard corner bead employing a reinforcing
member.
BACKGROUND OF THE INVENTION
[0002] Wallboard corner beads which are suitable for use on inside
or outside corners are known. However, prior art beads are
insufficient in that they do not provide enough protection from
being damaged by objects that strike them when they are installed.
This is a common, even frequent, occurrence when the corner bead is
installed on an exterior surface where it is likely to be struck by
servicemen using dollies and other equipment, children and their
toys, or careless walkers-by. Moreover, in arch applications, it is
common to get flat spots in the arch due the irregular nature of
prior art arch beads. Therefore, there is a need in the art for a
corner bead having improved strength and resiliency.
SUMMARY OF THE INVENTION
[0003] The present invention comprises a corner bead for joining
adjacent pieces of wallboard comprising an arched center section
having a pair of wing sections attached thereto. The arched center
section extends outwardly above planes defined by the wing
sections, and the wings and arched center section define an
interior surface which is placed adjacent the wallboard and an
exterior surface which is placed opposite the wallboard. A
reinforcing member is disposed adjacent the interior surface of the
arched center section and attached thereto to provide rigidity to
the arched center section.
DESCRIPTION OF THE DRAWINGS
[0004] In the accompanying drawings which form part of the
specification and wherein like numbers and letters refer to like
parts wherever they occur
[0005] FIG. 1 a sectional view of a corner bead according to one
embodiment of the present invention;
[0006] FIG. 2 a sectional view of a corner bead applied to an
intersection of wallboard according to one embodiment of the
present invention;
[0007] FIG. 3 a sectional view of a corner bead according to
another embodiment of the present invention;
[0008] FIG. 4 is a side view of a comer bead according to yet
another embodiment of the present invention;
[0009] FIG. 5 is a fragmentary perspective view of the corner bead
of FIG. 3 applied to an arched opening;
[0010] FIG. 6 is a fragmentary perspective view of the corner bead
of FIG. 3 applied to a rounded wall; and
[0011] FIG. 7 is a fragmentary enlarged perspective view of the
corner bead of FIG. 3 applied to a curved corner joint.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0012] The preferred form of the invention is shown in FIGS. 1 and
2 and comprises a preformed corner bead 10 for covering an exterior
corner where two pieces of wallboard A meet. The corner bead 10 is
made from polyvinyl chloride or composite material and is about
0.035'' thick. The corner bead comprises an arched center section
11 connecting outwardly extending wings 14 and 15. The wings 14 and
15 are most commonly positioned at a generally 90 degree angle with
respect to one another, although other angles can be employed. The
top of the arch section 11 preferably is about 1/16'' to about
3/32'' above the planes defined by the wings 14 and 15.
[0013] A reinforcing member 16 is provided in the general area of a
pocket 18 formed by the arched center section 11. The reinforcing
member 16 is preferably a tempered wire placed in a bed of adhesive
or hot melt glue or thermoplastic 17 in the arched center section
11 and maintained in placed with an adhesive. The reinforcing
member 16 can be applied by either applying a first coat of
adhesive 17 to the pocket 18, inserting the reinforcing member 16
and covering the wire with a second coat of adhesive 17 over the
top of reinforcing member or merely applying the adhesive 17 to the
pocket 18 and embedding the reinforcing member 16 in the adhesive
17. The corner bead 10 is applied to a wall in the same manner as
corner bead of the prior art. Specifically, a coating 20 of drywall
compound is applied to the wallboard A to provide adhesion between
the corner bead 10 and the comer is applied to the wallboard A.
Next, skim coat 22 of drywall compound is applied over the corner
bead 10 and the corner bead is feathered into the wallboard with a
coating 24 as a single process. Sanding and finish coats of drywall
compound provide a smooth surface. Once the corner bead 10 is
applied to the wallboard A, the tempered wire 16 provides rigidity,
strength and resiliency. It will also form an even and consistent
arch without flat spots.
[0014] Alternatively, the reinforcing member 16 may comprise a
polyamide hot melt glue as shown in FIG. 3, the hot melt glue
provides a lesser degree of strength of rigidity, but still
represents an improvement over the prior art. The hot melt glue is
applied to the pocket 18 of the arched center section in a heated,
liquid state and fills the pocket 18. The glue then cools to a
solid state and provides a reinforcing function.
[0015] Preferably, though not required, adhered to the corner bead
are a plurality of discrete fibers, as described in detail in U.S.
Pat. No. 5,418,027, which is hereby incorporated by reference. The
fibers are known as floc and can be Nylon, rayon, Dacron,
polyester, cotton or other cellulose, or other similar fibers or
combinations of fibers. The fibers have a diameter of about 1-3 Tow
deniers, but larger or smaller sizes will work. The preferred
lengths of fibers are about 0.005 to about 0.030 inches. Those
parameters are preferred because when the coated corner bead is
applied to a wall joint and only the corner bead edge is skim
coated, the uncoated surfaces can be painted as a finished wall.
The preferred size fibers are small enough to lay down when painted
so the paint will create a smooth finished surface. Larger sized
fibers do not give the desired smooth, painted surface.
[0016] The previously described embodiment is used when the
wallboard meets along a generally straight line. However, where
archways are employed or other nonlinear junctions of wallboard of
FIG. 1 is modified as shown in FIG. 3. The second embodiment
comprises a curvable corner bead 10 having the outwardly depending
and diverging wings 14 and 15 attached by the arched center section
11. The wings 14 and 15 are provided with V-shaped notches 32 which
have their apex 34 offset from the arched center section 11 and
their widest part is most remote from the center arched section 11.
The notches 32 thus define adjacent triangular solid members 14a
and 15a on their respective wings 14 and 15.
[0017] The notches 32 in each depending wing 14 and 15 are
staggered so that the apex of a notch 32 on wing 14 is aligned with
approximately the center of the triangularly shaped solid member
15a of the opposed wing 15. Thus the wings 14 and 15 are formed of
a continuous series of triangularly shaped pieces 14a, 15a. At the
point on the triangular pieces 14a, 15a which is most remote from
the center section 11 and along the outer edges of the corner bead
10 are releasable and removable tear strips 36 and 38. The purpose
for the tear strips 36 and 38 is to allow the notches 32 to
separate when the comer bead 10 is applied to an arched or rounded
opening or comer as shown in FIGS. 7-9. The pieces 15a on the inner
side of the curved comer gather together as also seen in FIG. 9.
Such an arrangement is disclosed in U.S. Pat. Nos. 5,4.18,027 and
5,037,686, which are hereby incorporated by reference.
[0018] Just as in the first embodiment, a reinforcing member 16
comprising tempered wire is placed in the arched center section 11
and maintained in placed with an adhesive that encapsulates the
wire. Alternatively, the reinforcing member 16 may comprise a
polyamide hot melt glue as in the first embodiment.
[0019] This invention is intended to cover all changes and
modifications of the example of the invention herein chosen for
purposes of the disclosure which do not constitute departures from
the spirit and scope of the invention.
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