[0001] The present invention relates to ceiling coving.
[0002] The correct method of making a ceiling coving is by the use of plaster, using a purposely
designed trowel for the application of the plaster. This method, apart from being
time consuming, requires a skilled plasterer.
[0003] It is known to secure preformed coving to a ceiling. Such coving may be formed of
expanded polystyrene or paper covered plaster. Each of these covings has its attendant
disadvantages. In particular, both materials are easily damaged, polystyrene because
it dents easily and plaster because it is brittle and its ends are easily scuffed.
Storage and transportation present problems as the covings can only be formed in long
fixed lengths. Shorter lengths would result in too many joints.
[0004] The joints between lengths are difficult to disguise when the coving is fixed to
a ceiling and furthermore, in the case of polystyrene, the finished appearance leaves
a lot to be desired aesthetically because even when painted the mottled texture of
the material is in evidence through the paint. Of course, the joints also mean that
the coving can only be given its finish coating after it has been fixed to the ceiling
and if it should need to be painted a different colour from the remainder of the ceiling
then painting it becomes both a skilled and a time consuming task.
[0005] The present invention seeks to provide ceiling coving which mitigates at least some
of the above disadvantages present in the prior art.
[0006] According to the present invention, there is provided ceiling coving comprising a
generally flat, pliable, continuous coving strip, and abutment means for affixing
to the wall and ceiling to constrain the coving strip to adopt a curved configuration.
[0007] In a second aspect of the invention, there is provided a method of securing coving
to a ceiling, which comprises cutting a desired length of pliable coving from a continuous
strip, mounting abutment means on the ceiling and on the adjacent wall, the separation
between the abutments on the wall and on the ceiling being less than the width of
the coving strip, and pressing the coving strip into the corner between the wall and
the ceiling, the abutment means serving to retain the coving strip in position and
to constrain the coving strip in the shape of a curved surface.
[0008] In a particularly simple embodiment, the coving is formed of a flat flexible plastics
strip. The strip may itself be decorative, but alternatively the strip may be laminated,
being formed of a base layer of polyvinyl chloride (PVC) and a decorative layer of
paper.
[0009] The coving strip may be formed with a pair of hinges extending parallel to its length,
the hinges defining two lateral return portions which may be folded back during fixing
to contact the surfaces of the wall and the ceiling concealed by the curved portion
of the strip, disposed between the hinges.
[0010] Advantageously, each hinge is formed of a pair of spaced hinge lines, the portion
of the strip between the hinge lines protruding at right angles to the wall and ceiling
when the coving strip is in position so as to space the curved portion of the coving
from the wall and ceiling.
[0011] The abutment means conveniently comprise brackets affixed between the wall and ceiling
at regular intervals. If desired the ends of the brackets may be configured for interlocking
engagement with the edges of the coving strip or the return portions of the coving
strip.
[0012] The coving strip may be formed by a variety of known method which need not be described
in detail and amongst such methods one can mention extrusion moulding, hot rolling
and cold rolling. The brackets may be made by injection moulding or as sheet metal
stampings.
[0013] If desired a pattern may be embossed onto the visible surface of the coving strip
and the strip may be supplied pre finished and
ready for mounting.
[0014] The advantage of the coving of the invention is that because it is pliable, it can
be supplied in continuous rolls and the limitations imposed by the prior art on the
length of any strip of coving are removed. Thus no length need have a joint and consequently
there is no reason for not applying a finish coating before mounting the coving on
a ceiling.
[0015] The coving is furthermore held in position only by brackets and it is therefore possible
to remove it. This may be desirable during the course of redecoration.
[0016] The coving may be used to hide wires passed around a room, such as telephone wires.
Furthermore, the coving material may itself be translucent permitting a light source
to be concealed behind it and giving a pleasing effect when the lights are switched
on.
[0017] For the corners and ends of the coving moulded corner pieces may be provided and
these may be formed for both convex and concave corners. The corner piece for a convex
corner may also be used as an end stop.
[0018] The invention will now be described further, by way of example, with reference to
the accompanying drawings, in which :
Figure l shows a roll of coving strip,
Figure 2 is a section through the coving strip in Figure l,
Figure 3 is a section through a bracket for securing the coving strip to a ceiling,
and
Figure 4 is a section showing the strip mounted in a corner between a wall and a ceiling
and held by means of the bracket of Figure 3.
[0019] Figure l depicts a roll l2 of coving strip l0 which is shown more clearly in the
section of Figure 2. The strip l0 consists of a plastics base l4 covered with a decorative
paper layer l6. The plastics material of the base may conveniently be polyvinyl chloride
(PVC) and the adhesive used to secure the paper to the plastics material may be polyvinyl
alcohol (PVA). The plastics base l4 has along each edge two score lines l8 which permit
the strip to be bent.
[0020] To mount a coving strip, brackets 20 are nailed to the corner as shown in Figure
4 with the nails 32 being inserted along a line marked at a given distance from the
corner. The brackets 20 are fixed at regular intervals sufficient to hold the coving
strip securely.
[0021] Each bracket 20 is formed of plastics material and comprises an inner section 2l
having a central boss 22 with a concave upper surface 24. Two film hinges 26 formed
on each side of the inner section 2l connect the inner section to two angled end pieces
28 each formed with a hole 30 for receiving a nail 32. A pip 33 is also formed on
the underside of each end piece 28, as viewed in Figure 3, to assist in holding the
coving strip against the ceiling or wall.
[0022] Because the nails 32 pass through the end pieces at a distance from the ends of the
brackets, the latter can be resiliently deflected away from the wall and ceiling sufficiently
to permit the folded over edges of the coving strip l0 to be inserted. After slotting
in of the edges of the strip l0, the latter is held in position by the pips 32. Double
sided adhesive tape 40 is used to secure the coving strip l0 to the central boss 22
of each bracket 20 to maintain the strip in a bowed configuration.
[0023] The parts of the coving strip disposed between the pairs of hinge lines lie at right
angles to the wall or ceiling when the coving is mounted and therefore give an appearance
which is the same as that of conventional coving.
[0024] At corners and at exposed ends of the coving, moulded corner pieces, not shown are
secured to the ceiling and these may be suitably designed for convex and concave corners.
The holes for the nails used to secure the corner pieces may be covered by blanking
plugs.
[0025] To form the coving strip l0, rolls of paper and plain PVC of the same width are rotatably
supported in a jig. A run of material from the PVC roll passes through two rollers
which score the surface t o form the hinge lines l8. The run then passes over
a glue roller and a doctor blade which together apply a thin layer of PVA adhesive
to the underside of the run. The two runs are then brought together in driven pressure
rollers and after the adhesive has dried the completed strip is taken up on a roll
driven by way of a slipping clutch from the motor driving the pressure rollers.
[0026] In addition to assuring a pleasing appearance, unmarred by any visible means of fixing
the coving to the ceiling, the coving of the invention can, if necessary, be removed.
This can considerably simplify redecoration of the room and provide a better finish,
since the panels of wallpaper can finish behind the coving and, if a room is painted,
the risk of painting the coving strip is avoided. Painting of the coving in a different
colour is also considerably simplified.
[0027] The coving strip may be painted before placing it on the ceiling, and can therefore
be purchased ready for use. The task of installation is thus simplified. The strip
may be embossed or electroless plated to provide an appearance not achievable with
conventional methods.
[0028] A further and important advantage of the coving of the invention is that the runs
of coving have some flexibility, even when curved, and the coving can have a neat
appearance even if the walls are slightly convex or concave in places, as is extremely
common in practice.
[0029] It should be mentioned that the invention has been described only by way of example
and various alternative embodiments are possible within the scope of the invention
as set forth in the appended claims. In particular, the strip may be formed entirely
of plastics material and may be formed as an extrusion moulding. The surface of the
strip may also be textured or embossed to give more freedom in the design of the coving.
1. Ceiling coving comprising a generally flat, pliable, continuous coving strip (l0)
and abutment means (20) for affixing to the wall and ceiling to constrain the coving
strip to adopt a curved configuration.
2. Ceiling coving as claimed in claim l, wherein the strip (l0) is laminated, being
formed of a base layer (l4) of polyvinyl chloride (PVC) and a decorative layer of
paper (l6).
3. Ceiling coving as claimed in claim l or 2, wherein the coving strip is formed with
a pair of hinges (l8) extending parallel to its length, the hinges defining two lateral
return portions which may be folded back during fixing to contact the surfaces of
the wall and the ceiling concealed by the curved portion of the strip, disposed between
the hinges.
4. Ceiling coving as claimed in claim 3, wherein each hinge (l8) is formed of a pair
of spaced hinge lines, the portion of the strip between the hinge lines protruding
at right angles to the wall and ceiling when the coving strip is in position so as
to space the curved portion of the coving from the wall and ceiling.
5. Ceiling coving as claimed in any preceding claim, wherein the abutment means comprise
brackets (20) affixed between the wall and ceiling at regular intervals.
6. Ceiling coving as claimed in claim 5, wherein the ends of the brackets (20) are
configured for interlocking engagement with the edges of the coving strip (l0) or
the return portions of the coving strip.
7. Ceiling coving as claimed in any preceding claim, wherein moulded corner pieces
are provided for corners and ends of the coving.
8. A method of securing coving to a ceiling, which comprises cutting a desired length
of pliable coving from a continuous strip, mounting abutment means on the ceiling
and on the adjacent wall, the separation between the abutments on the wall and on
the ceiling being less than the width of the coving strip, and pressing the coving
strip into the corner between the wall and the ceiling, the abutment means serving
to retain the coving strip in position and to constra in the coving strip
in the shape of a curved surface.