US1638280A

US1638280A - Fabricated board

Info

Publication number: US1638280A
Application number: US374833A
Authority: US
Inventors: Clarence W Utzman
Original assignee: United States Gypsum Co
Current assignee: United States Gypsum Co
Priority date: 1920-04-19
Filing date: 1920-04-19
Publication date: 1927-08-09
Anticipated expiration: 1944-08-09

Description

Aug. 9, 1927.

C. W. UTZMAN FABRICATED BOARD Original Filed April 19, 1920 u s W c m w ,C m Xxx w Jnuem foz Patented Aug. 9, 1927.

UNITED- STATES PATENT OFFICE.

CLARENCE W. 'UTZMAN, 0F BUFFALO, NEW-YORK, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED STATES GYPSQM COMPANY.

rABnIcArED BOARD.

Application fll ed April 19, 1920, Serial No. 374,888. Renewed January 5, 1923.

This invention relates to fabricated board, such, for example, as the co-called plaster board of commerce,'and has for its object the provision of an improved fabricated board having a body portion containing a cementitious hardened mixture. More particularly, the invention aims to provide an improved form or arrangement of covering sheet for protecting the surfaces and edges of the cementitious mixture body portion of a fabricated board.

The so-called plaster board ofv commerce consists generally of a sheet or slab of cementitious mixture, such as plas'ten. having its surfaces covered with enclosing sheets of paper, fabric, or other appropriate material. The body portion of the board is made up for the most part of stucco or calcined gypsum which gives rigidity and strength to the sheet or slab when hardened or set. The function of the covering sheet or sheets is generally to protect the hardened body portion of the board, to give tensile strength and to prevent breakage and chipping during the usual handling to which the board is subjected in the course of manufacture, transportation and assembling.

The present invention contemplates the provision of a fabricated board having a body portion containing a cementitious mixture with covering sheets of such a character.

and so arranged as to provide a maximum of protection against breakage and chipping of the surfaces and edges of the body portion. Moreover, the invention contemplatesthe provision of a double-faced board, that is, a board in which the two flat surfaces or faces are substantially of the same character so that either may be exposed when erecting the board. The invention further contemplates the provision of a fabricated board of the character hereinbefore. described which can be conveniently nailed or otherwise secured to the studding of a build ing without danger of chipping or fracture ing the hardened body portion, and whic is moreover of such configuration that the) attachin means can be easily covered over and o soured after the boards have been erected. T hese and other objects, of the in ventien. will be brought out in the. followfaces or faces thereof. The two covering sheets are of substantially the same width and each is of greater Width than the Width of the body portion. The sides or longitudinal ends of each of the covering sheets are turned or folded. over the longitudinal edges of the flat surface or face of the body portion to which the particular covering sheet adheres, and the turned-over sides of the covering sheets appropriately overlap on the longitudinal edge surfaces of the body portion. Preferably, the folded over sides of one of the covering sheets completely cover the longitudinal edge surface of the bodyportion, and the overlapping folded.-

over sides of the other covering sheet may completely or only partially cover the folded over sides of the other covering sheet. The folded over sides of the covering sheets are cemented together by adhesive other than that comprising the body portion of the board. Preferably, this adhesive is resistant to both water and extreme temperatures.

The novel features of the invention which I believe to be patentabl'e are definitely pointed out in the ap features, together wit the construction of a fabricated board embodyin the same, will be understood from the fo lowing description taken in conjunction with the accompany drawings,

in which Fi 1 is-aperspe'ctive view of a fabricated boar embodying certain improvements of the invention;

Figs. 2 and 3 illustrate modified arrangements of the covering sheets; j Figs. 4: and 5 ,are explanatory views i1- ended claims. These lustrating the mode of assembling the fablustrating different modes of assembling fabricated boards embodying the invention; Figs. 6 and 7 are detail sectional views particularly illustrating certain features of the invention; and p Figs. 8 and 9 'are explanatory views ilricated' boards shown in Figsu6 and 7, respectively.

The fabricated board of the invention, as

illustrated in the accompanying drawings, comprises a; body portion 10 containing hardened plaster. Usually. this body portion-is made up of stucco or calcined gypsum. The stucco or calcined gypsum is first made into a. plastic mass by the addition of water, and usually 10 to 15% of. fibrous material, such as sawdust or wood pulp, is added to the mixture. The plastic mass is then formed into a sheet or slab of the desired dimensions and enclosed in the covering sheets. Usually, these operations of shaping the bodyportion of the board and enclosing it in the covering sheets are performed in a continuous manner in a machine particularly adapted and designed for this purpose. In the accompanying drawin the covering sheets are represented by

re erence numerals

11 and 12.

In accordance with the present invention, the covering

sheets

11 and 12 are each of greater width than the-width of the flat suraces or faces of the body portion of the board. These coverin sheets, therefore, completely cover the at surfaces of the body portion 'and have their sides turned over and terminate along the longitudinal edge surfaces of the body portion. Thus, it will be observed by reference to Fig.1 of the accompanying drawings that the sides 12' of the lower coveringsheet 12 are turned over the lon 'tudinal edges of the lower face of the bodg portion 10- and that these turned-over sides 12" cover substantially the entire lon itudinal edge surfaces of the body portion. imilarly, the sides 11 of the upper covering sheet 11 are turned over the longitudinal edges of the upper face of the body portion, and these turned-over sides 11 appropriately overlap the turned-over sides 12'. The turned-oversides 11 of the one covering sheet may completely overlap the turned over sides 12 of the other covering sheet, as illustrated in Fig. 2 of the accompanying drawings, or these turned-over sides may overlap so as to exposev on the longitudinal edge surface of the board a portion of each turned-over side, as illustrated in Figs. 1 and "3 of. the accompanying drawings.

' The overlapping

sides

11 and 12"of the covering sheets are cemented together by an appropriate adhesive, which is indicated in t e accompanying drawingsby reference nucompanying, drawings. The folded over edge of the covering sheet may thus be either trimmed flush with the full thickness of the board, as shown in Fig. 2, or may be cut back as shown in Fig. 1, or may be bevelled as shown in Fig. 3, thereby providing various conditions at the edge of the board which give a wide range of decorative treatment according to the'manner of application of the board to the wall with either side to the supports, or according to the character-0f the final decorative surface desired..' In Fig. 4 of the accompanying drawings, a manner of assembling the boards is shown so as to provide a. substantially flush and continuousexposed surface which is particularly adapted to be covered with a fabric decoration 14. In Fig. 5 of the accompanying drawings, the boards are, represented as' assembled in such a manner as to provide a space or depression 15 between adjacent boards. This depression is filled with an appropriate binder which is preferably of a composition similar to the composition of the body portion of the board.

By filling in these depressions 15, a'smooth continuous exposed surface is obtained when the boards are assembled side by side. This surface may be covered with a fabric decoration or with a liquid coating decoration 16. In Figs. 4 and 5, the boards are secured to the studding or frame 17 by nails 18.

In Figs. 6 and 7 of the accompanying drawings, I have illustrated a fabricated board in which one or more of the edges of one face of the body portion are given such a contour .as to provide a space or depression between adjacent boards when assembled side by side. One face, that is the i inner face, when assembled, of the body portion of the board is flat throughout, while the opposite face has one or more edges thereof cu'rved. [n Fig. 6 of the drawings, the curved; contour 19 extends down over only a portion iof the longitudinal edge surface of the board, and the remainder of this longitudinal edge surface is square with the inner fiat face of the board. On the other hand, in the modification illustrated in Fig. 7, the entire longitudinal edge of the board is given a rounded contour as indicated by.,reference numeral 20. The sides of the covering sheets termihate on the longitudinal edges of thebda'rd and overlap as in the arrangements viously described.

Figs. 8 and 9 of the accompanying draw-i ings illustrate the manner of assembling fabricated boards of the form illustrated in Figs. 6 and 7, respectively. The fastening means, such as nails 21, are driven through the board at the rounded edge thereof. Inasmuch as the inner face or surface of the board is substantially flat and flush with the sup ort 22, there is little or no danger of crac ing' or chipping the board when the nail 21 is thus driven through. The dcpressionsor spaces 23 between adjacent boards are filled with an appropriate binder in substantially. the. same manner as described in connection with Fig. 5. The

outer or exposed surface of the assembled boards maybe decorated in any appropriate manner, as, for example, by decorative fabric or by paint or other appropriate liqplid coating com osition.

ach covering sheet, in accordance with the present invention, extends over the entire face of the plaster body portion to which it adheres and is securely fastened on both sides to the longitudinal edge surfaces of the body portion. By this arrangement, there results a remarkably strong board having a doubly reinforced edge, and

possessing a high' degree of strength on each face when subjected to either tension or compression strains. Moreover, by positively securing each side of the covering sheet to an edge surface of the'body portion a full grip is provided for the covering sheet thereby increasing the bending resistance. as well asproviding improved shearing strength over the entire area of both faces of the board.

A further advantage of the arrangement of the invention resides in the feature of the edges of the boards, when assembled side by side, forming either a closed joint suflicient-ly. accurate. for all practicalpurposes when used for paper or similar decoration. and at the same time of forming,

-when the boards are assembled side by side with the reversed faces exposed, predetermined and uniformly defined spaces or depressions which can be easily and quickly filled with a binder. The binder effectively connects the adjacent boards and renders the joints invisible when the exposed surface of the assembled boards is covered with paint-or similar decorativeagent.

In manufacturing, the improved arrangement of the eoveringsheets isof particular advantage in that only one width of cover- .ing sheet need be provided for both sides of th bod portion, and in assembling, the improved oard is of special advantage in that both faces or sides are alike, thereby permitting either side to be exposed and I portion mixture,

decorated if desired, so that the utility of theboard is not impaired if one face is damaged in transportation or handling.

I claim:

1. A fabricated board comprising a body portion containing a hardened cementitious mixture, a covering sheet adhering to each of the flat surfaces of said body portion and of greater width than said surfaces, each side of each of said covering sheets terminating on the adjacent longitudinal edge surface of said body portion where the ad-' jacent ends of the covering sheets appropriately overlap so that each covering sheet is folded over and protects the two longitudinal edges of the surface of the body portion to which it adheres, and an adhesive of different composition than said body portion for cementing together the overlapping longitudinal ends of said covering sheets.

2. A fabricated board comprising a body portion containinghardened plaster, a covering sheet adhering to each of the flat surfacesof said body portion'and of greater width than said surfaces, one of said covering sheets having each of its sides folded over. a longitudinal edge of the surface to which it adheres so as to substantially cover the adjacent longitudinal edge surface of the body portion, the other of said covering sheets also having each of its sides folded over a longitudinal edge of the surface to which it adheres so as to overlap but not completely cover the folded over sides of the other covering sheet, and a water-proof adhesive cementing together'the overlapping sides of said covering sheets.

3. A fabricated board comprising a body port-ion containing a hardened cementitious mixture, one face of said body portion being substantially flat throughout and the other face of said body ortion having one or more of its longitu inal edges of rounded contour so as to provide a depression adjacent to the edges of the boards when assembled side by side, a covering sheet adhering to each of the flat surfaces of said body por- 1 covering sheets appropriately overlap, anal means for cementing together the overlapping portions of the covering sheets.

4. A fabricated board coltiprising a body containing a hardened cementitious one face of said body portion being substantially flat throughout and the other face of said body portion having its longithe body portion where the tudinal edges of rounded contour, said T rounded contour including only a part of the longitudinal edgesurfaces of the body portion, a' covering sheet adhering to each of the flat surfaces of said body ortion and terminating on the portion 0 the longltudinal edge surfaces of the body portion which are not of rounded contour where the coverin sheets appropriately overlap, and means or cementing together the overlapping portions of the covering sheets.

5. A fabricated board comprising a body portion containing a hardened cementitious mixture, and a covering sheet adhering and completely covering each of the flat surfaces of said body portion and terminating on the longitudinal edge surfaces of the body portion where the ends of the covering sheets overlap, andan adhesive of dif-Y ferent composition for said body portion for cementing together the overlapping'portions of the covering sheets.

6. A plaster board construction comprising, in combination, separate plaster boards,

one of the faces of which is flat-and the other face of each having adjacent depressed margins, whereby when the boards are erected edge to ed e with right faces adjacent, one

surface wi 1 be plane and the other surface will have a depression; and fibrous covering material covering said depressed surface and arranged to be lnterposed between the depressed surface and the filling material for filling the depression to provide a flush surface, said fibrous material being capable of'mutually reinforcin the filling material and the depressed sur ace.

In testimony whereof I aflix my signature.

CLARENCE W. UTZMAN.