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[001] The present invention generally relates to the field finishing internal walls and more particularly, the present invention relates to finishing the corners of plastered walls..


[002] Plaster is very popular for internal wall finishing. The plaster is used to cover the wall and to compensate for any misalignment in the wall. One feature which is basic and essential to plaster construction is the edge. The edge is constructed using some form of corner bead. The corner bead typically provides an accurate corner of rigid construction which prevents chipping and nicking of the corner. Also the corner beading provides a screed edge to screed a level surface over the intersection covered by the corner bead strip.

[003] The corner bead is fastened to the wall by nails, screws or plaster. However, before fastening to the wall, the corner bead has to be aligned to be vertical with respect to the floor, and properly aligned with respect to other corners. Currently the alignment process takes much time. Traditionally, bead is fixed to a wall upon which a render material is to be applied by nailing the bid to the wall or by a process called dobbing on. Dobbing on involves applying a small amount of render to the wall before pushing the one side of the bead against the wall in a desired location before applying further render or aligning other bead end relative to the first bead end and applying further render.

[004] US patent 5,531,051 by G.J. Chenier et al. "Connector clip for Corner Bead" discloses a means for connecting corner beads to form a long straight unit. However it does not address the alignment problem.

[005] UK patent application 2479800 by P. Ryan "Plastering Profile" disclosed a corner bead constructed of two parts, each containing floor brace, ceiling brace and winding mechanism for aligning the corner. It requires to profiles per corner, and the construction and alignment of the profiles is complex.

[006] There is a need for an easy method to align corner beads.


[007] A device for the alignment of corner beads for wall plastering is disclosed. The device simplifies the installation and alignment of corner beads. It is comprised of an L shaped clip which is attached to the corner bead and a clip guide which is easily inserted into the walls. The clip can be moved in the clip guide, and hence moved relative to the walls. Once in place, the corner bead is permanently held in place by applying plaster, after which the clip guide is removed from the wall.

[008] In the he preferred embodiment the clip is made of a flexible plastic material that can be attached to the corner bead by adaptors that fits into the keying aperture of the corner bead. The clip guide includes an integral screw anchor that fits into drilled holes in the walls.


[009] Fig 1 shows a concrete block wall that has to be covered with plaster.

[0010] Fig 2 shows a perspective view of a section of a typical corner bead.

[0011] Fig 3 is a perspective view of the disclosed clip.

[0012] FIG 4 is a top view of the clip.

[0013] FIG 5 presents a perspective view of the guide.

[0014] FIG 6 shows a front view of the guide.

[0015] FIG 7 shows the corner bean with the clip and guide attached to a wall corner.


[0016] The invention will be described more fully hereinafter, with reference to the accompanying drawings, in which certain possible embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0017] In the following description, the same numerical references refer to similar elements. The embodiments, geometrical configurations, materials mentioned and/or dimensions shown in the figures or described in the present description are embodiments only, given solely for exemplification purposes.

[0018] Fig 1 presents a block walls that has to be covered with plaster. There is a corner 120 between walls 100 and 110. Line 140 represents a true vertical line, whereas line 130 represents the actual corner line of the walls. In order to straighten the walls, plaster has to be applied so the surface of the finished wall is aligned with the vertical line 140. Therefore, a corner bead has to be attached to the walls 100 and 110 and aligned with line 140. Note that in the example shown in fig 1, the protruding point of the wall corner 120 is at the top of the wall. The protruding point of the wall corner can be anywhere along the height of the wall.

[0019] A perspective view of a section of a typical corner bead is shown in fig 2. The corner bead 200 has two flanges 210 connected by a junction 220. In the flanges 210 there are key apertures 212 that provide greater engagement of the plaster overlying the flanges 210. The inner side of the corner bead faces the wall and the outer side of the corner bead faces the plaster.

[0020] The adjustable clip unit it is comprised of a clip and a clip guide. A perspective view of the clip is presented in fig 3. The L shaped clip 300, made of plastic material has two legs 310 at an angle of 90 degrees. On the outer side of each leg 310 there is jagged surface 340, and a protruding part 320 that fit into the key aperture of the corner bead. (212 fig 2). At the corner of the two legs 310 there is another protruding part 330 that fit into the inner part of the junction of the corner bead (220 fig 2). A marking hole 350 exists in each leg of the clip. The above

mentioned elements of the clip are also presented in fig 4 which shows a top view of the clip. Note that 310 points to the inner part of the clip

[0021] A perspective view of the clip guide is described in fig 5. The clip guide 500 has a clip passage 510 and a flexible clip holding tooth 520 and holding tooth handle 530. When the clip is inserted into the clip guide 500, the holding tooth 520 prevent it from moving. In order to move the clip, the holding tooth handle 530 has to be raised. A screw anchor 540 attached at the bottom of the clip guide 500 is used to firmly connect the clip guide to the wall by drilling appropriate hole in the wall. A side view of the clip guide is presented in fig 6.

[0022] A corner bean with the clip and clip guide attached to a wall corner is presented in fig 7. We will use this figure to explain the work procedure for aligning the angles of the corner bead using the adjustable clip according to the disclosed invention. The clip 300 is first attached to the corner bead 200 using the protruding parts 320 and 330. Next, the corner bead is pressed against the wall corner, and through the two marking holes 350, a mark is made on the wall. After marking, the corner bead is removed, and two holes are drilled where the marks are seen. The diameter of the drilled holes fit the size of the screw anchor 540 which is located on the clip guide. Next, two clip guides are attached to the walls using the screw anchors 540. Note, that in order to be able to align the corner bead, two sets of adjustable clips are requires, one at the upper side of the corner bead and another at the lower part of the corner bead.

[0023] The corner bead with the two clips is pushed against the corner of the walls while the clip legs are inserted into the clip guides. In order to align the corner bead, it can be moved by lifting the appropriate holding tooth handle 530. After the alignment, the corner bead is held in place by plaster applied to several location along its length. At this time the clip guides are extracted from the wall by a blow of a hammer, so that only part of the clip remains under the plaster layer.

[0024] It should be noted that clip is flexible so it can be bent to bring the corner bead to the desired position. It is assumed that the misalignment of the walls is in the order of few centimetres.

[0025] What has been described above are just a possible embodiments of the disclosed invention. It is of course, not possible to describe every conceivable combination of components and/or methodologies, but one of ordinary skill in the art may recognize that many further

combinations and permutations are possible. Accordingly, the invention is intended to embrace all such alterations, modifications, and variations that fall within the spirit and scope of the invention.