US2054085A

US2054085A - Reenforced plaster base

Info

Publication number: US2054085A
Application number: US625250A
Authority: US
Inventors: Lloyd F Johnson
Original assignee: United States Gypsum Co
Current assignee: United States Gypsum Co
Priority date: 1932-07-28
Filing date: 1932-07-28
Publication date: 1936-09-15
Anticipated expiration: 1953-09-15

Description

Sept. 15,1936. L, JQHNSQN 2,054,085.

REENFORCED PLASTER BASE Filed July 28, 1932 2 Sheets-Sheet 1 .9 J6 mvEN-roR LLOYD FJOHNSQN.

Sept. 15, 1936. F. JOHNSON REENFORCED PLASTER BASE Filed July 28, 1932 2 Sheets-Sheet 2 0 Rs Y .3 W NM R W1 0 NF m D u w v.. B 0 1 Patented Sept. 15, 1936 PATENT OFFICE aosaoss v V REENFORCED rLAs'rE z. BASE Lloyd F. Johnson, Wheaten, 111., assignor to United States Gyp m a corporation of Illinois Company, Chicago, 111-,

Application July 28, 1932, Serial No.- 625,250 10 Claims. (01. 12-124 This invention relates to building construetions, and has reference more particularly to plaster boards having joint reenforcing strips mounted upon the board at the time of shipment.

In erecting plaster boards, such as those madeof vegetable fibers or a cementitious core composition with paper cover sheets, as gypsum board, it is customaryto cover'the joints between plaster boards with metallic reenforcing strips prior to application of plaster, for the purpose of preventing cracks in the plaster at the board joints.

'It is preferable to have these strips attached to the plaster board at the time of shipment so as to reduce the amount of high priced labor necessary for erection at the job. However, the endeavor to market fiber boards with strips of metal mesh extending beyond the edge of the board has met with difficulty since the product is very difficult to pack for shipment, and furthermore, the overhanging metallic strips are apt to injure the handsof the workmen. The over- "hanging strips also make it difficult to nail the plaster board to the supporting studs.

An object of this invention, therefore, isto provide a plaster board having a reenforcing metallic strip sli'dably positioned adjacent an edge or edges of the board at the time of shipment.

Another object of the invention is to provide a plaster board unit consisting of a plaster board with reenforcing strips attached to the face ad- Jacent an edge and movable out of operative position so as to permit ready nailing of the plaster board to studding with a minimum of labor, and also to permit easy packing and shipment.

A further object of the invention'is to provide a plaster board reenforced unit in which a reenforcing strip is slidably attached to the face of the board so that it requires no further nailing prior to the application of a coating of plaster; also to improve building constructions in other respects hereinafter specified and claimed.

Reference is to be had to the, accompanying drawings forming part of this specification, in which Fig. 1 is a face view ofa wall embody ngthe improved reenforcing means of the invention,

Fig. 2 is a sectional view through the wall'con, struction taken on line 2-2 of Fig. 1,

Fig. 3 is a face view ofa plaster board with they reenforcing strip in a position convenient for. packing and shipment,

1'13. 4 is a sectional view throughthe plaster boardtakenbnlinel-lnfl'ig8,

Fig. 5' is a face view 'of 'a modified form of plaster board reenforcement. I r

Fig. 6; is a face view of a further modified form of plaster board reenforcement, and s Fig. 7 is a face view of a wall embodying the 5 reenforcing means shown in Fig. 6.

In Patent No. 1,740,493 to Birdsey and Manske,

a reenforcing strip is proposed for use ini'reenforcing the joints of plaster boards, this strip being composed of two or more longitudinal wires l0 III to which have been welded cross wires I l'which terminate in return bent hooks l2. Patent No. 1,768,127 to Manske and McNeil, describes a machine for making joint reenforcing strips of this nature.

I have discovered that reenforcing strips'of the type described in these patents are especially adapted for use in formingplaster board units consisting of plaster boards of fiber or paper covered composition and reenforcing o strips slidably attached'to the face of the plaster board at the time of shipment. The plaster boards are preferably made of wood or other vegetable fibers, and may be provided with shiplapped longitudinal edges l3 which interlock, ends of the g5 board may be secured adjacentthe board joints by nails H which are driven through the plaster board into a supporting stud l5. In order to attach the reenforcing' strip to the plaster board prior to shipment, I provide staples l6, which have legs ll driven through the plaster board and terminate in points I8 which are clinched at the rear face of the plasterboard. The staple i6 is spaced apart from the front face of the plaster board so as to slidably receive one of the cross 35 wires l I. The staple I6 is set back from the edge of the plaster board so that during shipment and during the time that the boards are erected on studs I! by driving the nails It, the reenfor'cing lies out of operative position as shown in 0 Fig. 3. a

After the boards are nailed to the studs. the

- reenforcing strip is moved transversely with the wires Iii-sliding through the staples 16 so that the reenforcing strip overlies 'the longitudinal 5 joint as seen in Fig. 1. A plaster coat" is now applied over the plaster board, board joints and reenforcing strip in the usual manner. Owing to the fact that the strip lies flat after ithas been L stud is required 'prior to the application of the plaster 20, although supplementary nailing of this nature-may be used if desired. .The boards 1 (Fig. 1) are usually arrangedwith their longitudinal joints extending horizontally, and with the board joints staggered. The reenforcing strip is usually only necessary along the longitudinal edges of the board, but they may be placed along the ends of the boards if desired.

In the preferred form of the invention, the staple I6 extends parallel with the edge of the board and with the reenforcing strip. In the modified form of construction shown in Fig. 5, the staples 16a may be turned at right angles to the reenforcing strip and edge of the board with the staple embracing one of the longitudinal wires Ill. The staple lGa is preferably made somewhat longer than the staple I6 permitting suilicient sliding movement, of the reenforcing strip so that it can lie in either the inoperative position shown in dot and dash lines in Fig. 5, or in the operative position shown by full lines in said figure. With this arrangement of the staple Ilia, the reenforcing strip may be moved longitudinally as well as transversely into operative position so that the end of the strip overlies the corners of the boards to reenfo'rce the corner joint.

While I have describedrthe use of a reenforcing strip as disclosed in the aforementioned patents, any other suitable type of reenforcing strip may be used as long as it permits the sliding movement of said strip from inoperative to operative position. The plaster board unit which I have disclosed is convenient for packing and shipment of the plaster boards due to the fact that the reenforcing strips do not project beyond the edge of the board when they lie in inoperative position, and these units are also an advantage due to the fact that a free space is permitted for nailing the plaster board units directly to the studs without interference by the reenforcing strip. The plaster boards units are also an advantage in preventing injury to the hands of workmen during erection of the plaster board units as the strips have no edges projecting beyond the edge of the board when they lie in inoperative position. As an example of another type of sliding reenforcing strip which might be used, those shown in Figs; 6 and 7 are cited. In this type of strip, diagonally extending cross wires 23 are secured as by welding to longitudinal wires 24. Staples 25 engage the cross wires so that as the strips are moved transversely, they also automatically move longitudinally to cover the joints at the corners of the boards.

I would state in conclusion that while the 11- lustrated examples constitue practical embodiments of my invention, I do not wish to-limit myself precisely to those details, since manifestly,

strip to said board and securing the same in said plane, but permitting sliding movement of said strip in said plane to permit said strip to lie in operative, overlapping position, or in inoperative position.

2. Ina plaster board unit, a plaster board. a reenforcing strip positioned adjacent an edge of said board in a plane substantially parallel to the face of the latter, and means for attaching said strip to said board and securing the same in said plane, but permitting sliding movement of said strip in said plane.

s. In a'building construction, a anof boards allel relation to the face of said board, a portion of said strip being slidably supported between said staple and the face of said board.

5. In a plaster board unit, a plaster board, a reenforcing strip composed of longitudinal and cross wires, said strip being positioned adjacent an edge of said board, and staples secured to said board parallel to the edge thereof and engaging one of said cross wires to slidably secure said strip to said board.

6. In a plaster board unit, a plaster board, a reenforcing strip composed of longitudinal wires and cross wires having hook ends extendingbeyond said longitudinal wires, and staples for slid ably securing said strip to said board adjacent a board edge.

7. In a plaster board unit, a plaster board, a reenforcing strip'composed of longitudinal and cross wires, and staples secured to said boardjand slidably connectin'gsaid longitudinal wires to said board.

8. 'In' a building construction, a pair of plaster .boards in edge abutting relation, a stud, means of securing the edges of said boards to said stud, a metallic reenforcing strip secured to one of said boards in a'plane substantially parallel tothe face of the latter and arranged for sliding movement in said plane over the joint between said boards, and a coating of plaster over said strip and boards. said plaster servihg to lock said strip against sliding movement.

9. In a plaster board unit, a plaster board, a reenforcing strip composed of spaced longitudinal wires and-diagonal cross wires, and staples secured to said board and slidably connecting said cross wires to said board so as to cause the longitudinal actuation of said strip as,said strip is caused to move transversely. 1

10. In a plaster board unit, a plaster board, and a reenforcing strip connected to said plaster board in a plane substantially parallel to the face of the latter so as to be capable of both-longitudinal and transve se sliding move- -ment in said plane.

morn r. JOHNSON.