US2593859A - Shoulder-bead for use in dry wall construction - Google Patents

Description

April 22, 1952 NL 2,593,859

SHOULDER-BEAD FOR USE IN DRY WALL CONSTRUCTION Filed July 12, 1949 /5/2 #7 5 9? 19 2 Jay. .3- y- INVENTOR.

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Patented A r. 22, 1952 SHOULDER-HEAD FOR USE IN DRY WALL CONSTRUCTION Arthur H. Dunlap, Seattle, Wash.

Application July 12, 1949, Serial N 0. 104,220

This invention relates to crowning assemblies particularly adapted for use in dry-wall construction on an outside corner formed by two angularly disposed abutting sheets of wall-board, or on the exposed corner presented by a sheet of wall-board which abuts a door or window jamb. The invention aims to provide a structure superior to the corner-bead assemblies illustrated and described in my pending applications for Letters Patent of the United States, Serial No. 63,689, filed December 6, 1948, and Serial No. 81,549, filed March 15, 1949.

It is an object of my invention to provide a corner crowning assembly superior to the cornerbeads shown in the said prior applications in that it can be used without beveling or other wise altering the corner formed by two angularly disposed abutting sheets of wall-board.

1 Claim. (Cl. 20-74) It is a further object of my invention to provide a crowning assembly capable of dressing and protecting the exposed side edge of a sheet of wall-board abutting a door or window jamb.

Still another object of my invention is to provide crowning assemblies adapted for use in drywall construction on a rounded corner, or a rounded side edge of a sheet of wall-board.

A further object of my invention is to provide crowning assemblies capable of being easily set in position and held therein only by putty or the like applied sparingly over portions of my assemblies and the adjacent surfaces of the wallboard.

These and other objects will be revealed in the following detailed description of my invention.

In the accompanying drawing:

Figure 1 is a horizontal sectional view showing an embodiment of the present? invention as applied to dress an abrupt outside corner of a dry-wall room, the wall boards being shown fragmentarily.

Fig. 2 is a similar view of a modification of the invention particularly formed to adapt itself to a rounded corner.

Fig. 3 is a horizontal sectional view of a further modification of the invention shown applied to dress oil a bull-nosed edge of a sheet of wallboard where the latter laps a door or window jamb; and

Fig. 4 is a view similar to Fig. 3 excepting that I have here shown the invention as being particularly formed to adapt itself to a square edge.

Referring to Fig. 1 of the said drawing, the

corner crowning assembly therein illustrated incorporates an elongated corner-crowning piece 5 composed of plastic, metal, or any other relatively inflexible material and formed to an angular shape in cross-section, the V-channel which this angular shape produces enabling the cornerpiece to find close-seating engagement over an outside corner produced by two angularly dis-,- posed lapped sheets of wall-board, designated by I0 and II, applied as a dry-wall surfacing for a room framed with the usual studs l2. Said corner-piece has a strip of tape-like pliable material glued or otherwise securely bonded to its underside, and the width of this tape is such as to leave free wings I projecting well beyond each side edge of the corner-piece. A heavy grade of strong paper and such, for example, as kraft stock is eminently suitable as the material of the tapes composition.

It is to be understood that the corner-piece and its facing tape are available as a factorymade unit assembly, and the manner of application is shown in Figure 1, and namely such as to have the corner-piece seat snugly over the squared-off corner of the lapped sheets of wall-:- board with the free wings projecting in opposite directions loosely overlying the outer faces of the two sheets of wall-board adjacent their meet ing ends. When setting the corner-piece the wing sections may, if desired, be tacked or spotglued to the underlying wall-board preparatory to application of a layer l3 of Swedish putty or other like or suitable plaster-like substance, but this is not necessary inasmuch as an operator can easily hold the corner-piece in position while trowelling a thin layer of said putty over the wings. The usual practice, in applying the putty, is to utilize only so much as is necessary to draw the same flush with the exposed face of the angular corner-piece and the thickness of the corner-pieces side edge l5 serves as a gauge for this purpose. The applied putty may, if de'.- sired, be given thicker substance sufficient to coat the corner-piece. In either such case, the area of greatest thickness occurs adjacent the side edges I5 and tapers therefrom at each side of the corner-piece to a substantial feather-edge at a point laterally removed beyond the end limit of the related wing. When paint is later applied to the wall, the corner which has been faced with my crowning assembly gives a smooth and unbroken appearance almost incapable of being distinguished from a lath-and-plaster surface. In the embodiment which I have illustrated in Fig.

2 the outer one of the two lapped sheets of wallboard, designated by H, is indicated as having been sanded down or otherwise so made as to round ofi the outside corner which the two sheets produce, and the corner-piece here provided is given an arcuate shape in transverse section to compensate the same to this rounded shape. In all particulars other than its said sectional configuration the corner-crowning assembly shown in Fig. 2 is the same as that shown in Figure 1.

In Figs. 3 and 4 I have shown embodiments of the invention adapted to be used for trimming around door and window openings in dry-wall house construction to give, as with the cornercrowning assemblies, the smooth and unbroken appearance which, heretofore, has been thought to be possible only by employing lath-and-plaster as the finishing material. In these views, ll denotes the cripple which frames the door or the window opening, as the case may be, it desighates the jamb, and I8 and 2B designate, in Figs. 3 and 4, respectively, a sheet of wall-board which is brought beyond the cripple into lapping relation to the jamb. In Fig. 3 I show the sheet as having its end edge rounded off and in Fig.4 I show the edge as being squared off. The crowning' members which I provide for these end edges are quite similar, one to the other, and are, in fact, not unlike the corner-crowning members heretofore described. In the instance of either type of end-edge crown, and namely bull-nosed or square, a strip of tape is similarly glued or otherwise affixed to the inside surface of a backing piece of metal, plastic or other like or suitable relatively inflexible material which has been pressed into the shape necessary to adapt itself to the end edge which it is to overlie. In Fig. 3 the backing piece is bent upon itself along a longitudinal line and one of the two sections thereby formed and designated by 6 is substantially straight or plane and the other of the two sections, designated by 8, has an arcuate shape almost identical with the corner-piece 5 shown in Fig. 2. The tape I9 in this arrangement need only project laterally from one side edge limit of the backing piece, and more especially from the side edge of the arcuate-shaped section. In applying the style of crowning member here illustrated, the procedure is to slip the same over the end edge of the wall-board before the latter is set in place and then localize the two by driving a flat-headed nail (not shown) into the cripple 1.1, the nail being driven from the outside face of the wall-board to pass through the board-and coincidently catch the underlying section 6' of the crowning member. The fly section of the tape I9 is then pressed down over the head of the nail and Swedish putty 2-3 is applied over this fly section and trowelled smoothin the manner previously described. In Fig. 4 the backing piece for the tape is sectionally of a double-L shape to present flanges 9 and 5 extending in opposite directions from a center section 9, and the tape 19 of this embodiment projects, as with the embodiment of Fig. 3, only from one side edge limits of the backing piece proper. The double-L. shape has this advantage, to-wit: it permits the crowning member to be set and secured in place after the sheet 20 of wall-board has been nailed to the framing studs of the room, screws (not shown) being applied through the flange 9 into the jamb I6. Whether the backing piece for the tape be of the channel type portrayed in Fig. 3 or the double-L type portrayed in Fig. 4 it is thought to be self-evident that the concerned backing piece can be shaped to give either a rounding or square finish to the edge being trimmed.

It is important to note that my strips 6 could be formed of an open-mesh material so that the putty l3 would impregnate and pass through the wings I and bind them to the wall-board but such is not necessary and it is more economical to use imperforate kraft paper, the lapping putty being sufiicient in and of itself to firmly anchor thesame. v

Minor changes may be resorted to without departing from the spirit of the invention and I therefore intend that the hereto annexed claim be given a scope fully commensurate with the broadest interpretation which the employed language fairly permits.

What I claim is:

In dry-wall construction, in combination: two sheets of wall-board placed angular to one another with an edge of one abutting an edge of the other to conjointly present an outside corner, means crowning said corner and comprised of a wide ribbon of flexible material and a complementing narrower strip of inflexible material centered upon and firmly cemented to the ribbon so as to have edge portions of the ribbon project laterally as wings well beyond each of the opposite side margins of the strip, said inflexible strip being pre-formed to a sectional shape conforming to the cross-sectional profile of the corner so that the strip closely fits the corner with the projecting wings in covering relation to adjacent portions of the wall-board lying at each side of said corner, and putty-like material investing the wings and also covering portions of the two wall-boards which lie beyond the side-edge limits of the wings, the applied putty being dressed flush with the exposed face of the Wall-board to produce a smooth unbroken surface substantially conforming in appearance to a plaster wall and serving to immobilize the wings and responsively hold the inflexible strip in a. fixed position over the corner proper.

ARTHUR H. IDUNLAP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,041,799 Walper May 26, 1936 2,234,701 Lyman Mar. 11, 1M1

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