US1872985A - Reenforcing base for plastic material - Google Patents

Description

Aug. 23, 1932- G. E. LAND REENFORCING BASE FOR PLASTIC MATERIAL FiledMay 8, 1930 INVENTOR Patented Aug. 23, 1932 i P TENT oFF cs GEORGE E/LAND, OF :errrsiacneir, PENNSYLVANIA, ASSIGNOB, BYMnsnnAssIeN; MENTS, TO MARY names MARKS, or snwroxnnr, rnnnsyzcvnnm Y BEENFORCING BASE FOR PLASTIC MATERIAL Application filed May 8,

Mv invention relates to wall construction, and more particularly to a reenforcing base for plastic material. I provide a reenforced base for plastic material consisting of a sheet of fibrous material such as paper, hav- 3 being intimately secured to the side of the sheet away from the plaster by the same operation by which the grooves are formed.

The present invention is an improvement in the base for plastic material of my 00- pending application Serial No. 359,481, filed May 1, 1929.

Modifications of my invention are shown in the accompanying drawing, in which Figure 1 is a view in side elevation of a 9 portion of a wall partly broken away;

Figure 2 is a cross-sectional view of the portion of the wall illustrated in Figure l; and

Figures 3, 4, 5, and 6 are cross-sectional .5 views of bases constructed in accordance with my invention, showing various shapes of grooves.

A sheet of paper less than three-sixteenths of an inch in thickness will not of itself support a layer of plaster because of its lack in inherent strengthj Heretofore metal strips have been used to reenforce and strengthen a sheet of paper so that it can be used as a plaster base. In all of the methods heretofore used to associate the metal reenforcing member with the paper, the strips have been separate parts of the whole and the means used to hold the strips in place have been costly and slow.

I provide a reenforced plaster base in which the reenforcing strips are of the same shape as the grooves or corrugations and in which the reenforcing strips are attached to thepaper and shaped to the form of the grooves by the same press operation.

Referring to the drawing, a sheet of paper 2 is provided with corrugations 3 to the outer side of which are attached metallic reenforcing channels 4 of the same shape as the corrugations 3. The reenforcing membersl 1930. Serial N0. 450,680.

are intimately secured to the sheet 2 by" tionsare then made in the paper and me tallic strips by one operation. By the same operation, the metallic strips are punched to thereby secure the strips to the paper.

' The metallic reenforcing' members may, of

course, be cemented or glued to the paper to form an intimate union between the two.

The grooves may be of various shapes; for example, Flgure 3 shows grooves of pl-shape,

Figure 4 shows grooves of U-shape, Figure- 5 shows grooves of sem1-c1rcular channel grooves of exshape, and Figure 6 shows a-ggerated U-shape.

Where a groove "of an exaggerated U-;

shape is used, as shown in Figure 110 reenforcmg members 6, the metalby the shape of the groove.

.The ribs or grooves-are. preferably formed 6 are held in place in the direction of the natural grain of the about two inches apart.

Referring to Figures 1 and 2, the reenforced plaster base fl is secured to aspaced vertical joist 7'by means of nails 8 that are journ'alled through the bottom ofthe grooves 3 and the reenforcing members 4; into the joist7'. g I

Vertical members 9 maybe used either to, add transverse rigidity or to reenforce alayer of plaster 10. that is placed on the base 1; Commercial reenforcingmaterials, such as metal lath or wire netting, may be attached to the backing by means of staples. It will be understood, however, that the attaching may beaccomplished'by lips integral. with but extending from the stifiening members through the fibrous material and engaging the vertical members 9 or the commercial reenforcing materials.

paper, the grooves being spaced parallel The corrugations in the plaster base lserve to space the inner side of the base away from the joist 7 a distance that is approximately equal to the thickness of a conventional wood lath. I

In my plaster backing, I provide maximum transverse rigidity as Well as maximum longitudinal rigidity in an inexpensive operation.

I further provide for corrugating the paper and fixing the stiffening, members in one operation. In addition to the above, a

plaster backing is provided which presents an unbroken surface for the reception of a layer of plaster. This improves'the bond between the base andthe plaster.

While I have illustrated and described preferred forms of myi-nvention, it will be understood that it is not thus limited, but

may be otherwise practiced and embodied within the scope ofthe following claims:

VI-claim: I v v I 1. ,A backing for plasticmaterial comprising a sheet of fibrous material having spaced parallel corrugations therein and stiffening members for said grooves having integral means extending into the bodyzof said sheet for securing said membersto said sheet.

2. A backing for plastic material comprising a sheet of paper having parallel spaced grooves therein extending in the direction of the natural grain of the paper and stiffening members of the same shape as thegrooves and means uniting said stiffening members to the paper, said means being disposed exclusively on the side of the paper away from the plaster side. V

3. A backing for plasticmaterial:comprising a sheetof fibrous material having spaced parallel grooves therein and stifiening mem bers intimately associated with said grooves,

the stiffening members having lips which penetrate the fibrous material and engage plaster-reenforcing and backing-stifiening 4, VA backing for plastic material comprising a sheet of fibrous material having spaced parallel grooves therein and stiffening mem- .bers intimately associated with said grooves, the stiffening members having lips which penetrate the fibrous material and engage V plast'er-reenforcing; and backing-stifiening means, the grooves being in the direction of the grain of the fibrous materiaL In testimony whereof I have hereunto set,

myhand. r V p q I GEORGE E. LAND.

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