US1212740A - Metal corner-bead. - Google Patents

Description

N. 5.0mm METAL CORNER BEAD.

APPLICATION FILED MAY 7, 1912.

Patented Jan. 16, I917.

I 6 IIIIIIIIIIII NORRIS ELMORE CLARK, 0F PLAINVILLE, CONNECTICUT.

METAL CORNER-READ.

Specification of Letters Patent.

Patented Jan. 16, 1917.

Application filed May 17, 1912. Serial No. 698,078.

To all whom it may concern.-

Be it known that I, NoRRIs ELMORE CLARK, a citizen of the United States, and resident of Plainville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Metal Corner-Beads, of which the following is a specification.

My invention relates particularly to what are generally termed metal corner beads.

The main object is to provide a rigid but light weight corner bead which can be manufactured at a low cost and which can be readily shipped and erected and will have great holding power.

In its preferred form the corner bead has a rounded edge portion with lateral channels on each side for the plaster, together with spaced lugs and flaring arms. When a more rigid construction is desired wires may be attached to the outer edges of the flaring arms and additional stiffness may be provided if desired in the edge of the bead rounded outer edge and'provides a secure by a supplementary wire or rod.

The corner relatively narrow strip of metal by first cutting portions of the opposite edges to form a pair of arms, then bending the ends of the arms upward from the plane of the strip, then bending the bases of the arms downward from the plane of the strip so as to throw the ends downward and outward, then the ends of the arms are folded against the bases of the arms and flared outwardly and the edges of the body of the bead are The stripcorrugated bent inward toward each other. is preferably longitudinally along the center substantially at the same time that the arms are first cut. This stiffens the strip and facilitates feeding as well as assisting in the following forming operations. The longitudinal side wires may be attached by tangs cut from the arms and curled outward around the wires after the arms have been bent nto their final position The construction and method of manufacture are such that the corner bead may be readily produced by means of an automatic press having a suitable set of cutters and dies and arranged to operate by successive steps so that the blank strip is fed in at one end and the completed bead is delivered at the other end thus merely requiring an attendant for watching the machine.

The machine and tools for forming the bead is manufactured from a the arms are bent up as at bead will be made the subject matterof another application.

Figure 1 is a plan view showing a strip of metal in the various steps of manufacture from the blank strip to the finished bead. Fig. 2, is a side view of the same. Fig. 3, is an enlarged section on the plane of the line X of Fig. 1. Fig. 1, is an enlarged section on the plane of the line X Fig. 5, is an enlarged section on the plane of the line X Fig. 6, is an enlarged section on the plane of the line K. Fig. 7, is an enlarged section of the body of the bead without any supplementary reinforcing wire or rod.

In order to more clearly understand the invention I will describe the finished product first. 1 v f The outer edge of the body 1 is preferably curved as shown in Figs. 1, 2, 6 and 7. The rear edges 2, 2 of the body of the bead are pressed together as shown in Figs. 6 and 7 so that lateral channels are formed back of the shoulders 3, 3. This gives a smooth anchorage for the plaster. Projecting rearwardly from the body portion of the head are the lugs 4:, 4: and flaring outward from these lugs are the arms 5, 5 which are adapted to rest against the corners of the wall. Portions of these arms 6, 6 are folded against the lugs 41:, 4; as shown. The lugs of a single pair are spaced apart laterally and are adapted to act as stops against the corner'post of the wall where the corner bead is to be used. While the shape of thebody and edge of the bead gives it great rigidity for the amount of metal employed, in cases where additional lateral stifiness is desired I employ longitudinal rods or wires such as 7,7 which may be secured to the arms for instance by means of tangs such as 8, 8. light in weight and yet rigid and affords openings through the sides of the bead back of the body portion so that the plaster can be united from the two sides of the angle in back of the body of, the bead. When additional stiffness is required in the bead a supplementary wire or rod 9 may be used.

The corner bead is made from a strip of metal 10. Arms 11, 11 are cut from opposite edges by suitable dies. The center of the strip is also corrugated longitudinally as at 12 preferably adjacent the cut portions.

In the next step of the action, the ends of 13, 13 by suitable This construction is dies leaving the bases of the arms 14c, 14 and the edges 15, 15 of the body portion in the plane of the original strip.

In the next step the central portion of the strip is corrugated more deeply as at 16 and the side edges 17, 17 and the bases 18, 18 of the arms are bent downward carrying the ends 19, 19 of the arms also downward. The metal is given an outward and downward bend as at 20 to bring the parts into a better position for the following actions.

In the next step the arms are folded along the angles 21, 21 so that parts of the arms 22, 22 are pressed against the bases of the arms and their outer ends 23, 23 are flared outwardly, r

In the next-step the edges of the body of the bead are bent inwardly as at 2% by the action of suitable lateral dies. In cutting the arms, dies having rounded corners are preferably used so as to produce a round out 25. In the finished product this rounded portion connects the rear edge of the body of the strip with the lug which carries one of the flaring arms. The use of this rounded corner is advantageous in that the metal is less likely to fracture at this point where the arms and lug are attached to the body of the bead. The base of each arm is made narrower as at 27 to facilitate bending and give greater strength to the lug.

In the next step the edges of the body are closed together as at 2, 2 into a completed bead. This final closing together will produce the finished arch or rounded edge of the bead. The rod or wire 9 may be inserted just before the edges 2, 2are closed together or run along with the strip.

By this method of construction a corner bead having long attaching arms may be made from a narrow strip of metal. As the body is made out of a small amount of metal it is light in weight and inexpensive. The method also is susceptible of operation in an automatic machine which requires but little attention to operate. The advantages of this construction will be apparent to those skilled in the art.

What I claim is 1. A corner bead formed of a strip of metal and having a rounded outer edge, spaced lugs projecting rearwardly from said rounded outer edge and bendable attaching arms out longitudinally from the edge portions of the strip between the positioning Copies of this patent may be obtained for five cents each, by addressing the lugs, each of said arms being integrally united with a lug at one end and free from said strip for the rest of its length, said arms being folded back against the lugs and flaring outwardly therefrom to provide a corner receiving angle in rear of the said lugs, and the sides of the bead in rear of the outer edge thereof being indented to provide shoulders and lateral channels.

2. A corner bead formed of a strip of metal and having a rounded outer edge and rearwardly projecting spaced lugs and arms out from the sides of the strip and folded over against the lugs and flaring outwardly and leaving openings for the plaster, the sides of the bead being bent inward slightly in rear of the edges so as to form lateral channels'and longitudinally extending side wires secured to the outer ends of the arms.

3. A corner bead formed of a strip of metal and having a rounded outer edge and rearwardly projecting spaced lugs and arms out from the sides of the strip and folded over against the lugs and flaring outwardly and leaving openings for the plaster, the sides of the bead being bent inward slightly in rear of the edges so as to form lateral channels and longitudinally extending side wires secured to the outer ends of the arms by means of tangs cut from the arms and curled around the wires.

4. A corner bead comprising a body portion and arms out out longitudinally from the side of the body portion, said arms being bent backward substantially at right angles to the front edge of the body portion and extending 011 divergent lines in rear of the body portion, and said arms being narrowed at their point of attachment to the body portion to facilitate bending of the same.

5. In a corner bead construction, a folded body having its central portion formed to constitute an edge protecting member and having projecting side portions with small integral tangs punched therefrom adjacent the rear edges thereof whereby other members may be secured to said parts by means of said tangs, the bending outward of said tangs leaving small holes in said parts suitable for the reception of fastening nails.

. NORRIS ELMORE CLARK.

WVitnesses Mnnrr'r O. RYDER, MARSHALL P. RYDER.

Commissioner of Patents,

Washington, D. G.

Images