US1526307A - Wall board - Google Patents

Description

Patented Feb. 10, 1925.

cnmEs n mrwsny, or HmsDA FJ,

rumors, AssIoNoR To UNI ED s'rarEs GYP- sum COMPANY, or CHICAGO, ILtINoIs, a ConronArron or ItLINoIs. I,

" WALL BOARD.

lpplicationflled October 10, 1921. Serial. No. 506,675.

To all to/m it may concern a Beitknown that I, CHARLES'R. BInnsEY,

' tion is illustrated State of Illinois,

ed es oft a citizen of the Hinsdale, in the have invented" new and Improvements in ,Wall Boards, of which the following is a specification.

The invention relates to improvements in wallboards and more particularly to a wallboard made of plaster with a paper covermg.

A distinction has arisen in the trade whereby the term wallboard is applied to prepared board that can be secured in place in a building and its surface is ready to paper or paint without any other coating, while the term plaster-board is applied to a prepared board that is secured to the studding in the place of laths and presents a surface to receive plaster beforeit is painted or papered.

It is an, object of this invention to provide a wallboard the body of which is a comuseful position, preferably plaster, covered on each slde with cover sheets, preferably and in so constructing the longitudinal edges of the wallboard that the composition body during manufacture will be retained directly to the edges at a uniform thickness throughout and the cover sheets adjacent the edges so reinforced as to maintain a full straight edge of uniform thickness during transportation and upon a plication, allowing wallboards to be placed edge to edge uninterrupted by any nailed in such position without disruptin the plaster body between the coverings at t e edges.

, While the preferred form of this invenupon the accompanying sheet of drawing, yet it is to be understood that minor detail changes may be made without departing from the scope thereof.

In the drawing:

Figure 1 is a view in cross-section, with parts broken awa illustrating the construction of the ongitudinal edges of a form of this invention. 1

Figure 2 is a perspective view of Figure 1 illustratin the longitudinal and transverse is improved form of wallboard; igure 3 is a detailed view in cross-section illustrating a modified form of edge construct'ed in accordance with this invention. Figure4 is a perspective view of Figure "which the composition with a 1121 edge thereof formed 3 illustrating the longitudinal 'and transg I Verse edges of, this form of wallboard. UnitedStates, residing at county, of Du Page and l Vallboard of thisgeneral type is usually through whichis fed a wide strip ofpaper which forms the bottom covering upon is automatically spread and a similar strip of paper forming the upper sheetis fed thereover, the two cover sheets with the composition body between them passing out of the machine between ,rollers that impart a uniform thickness to the 'wallboard.

, This invention contemplates turning back upon itself, each longitudinal edge of each cover sheet so that the ends'are on the inside and the sheets of uniform width.

As shown on the drawing, 1 is the under or bottom cover sheet and 2 the upper or top cover sheet, 33 are the bent back rtions of the longitudinal edges of the bottom sheet and 4-4 the bent back edges of the upper sheet. This construction gives the cover sheets rigidity to maintain the body 5 continuously to the edge 6 of the wallboard on each side during fabrication,

holds the body firmly between them and is reinforced so as to protect and keep in- 1 rupting the plaster at the edges.

If desired, while in course of manufacture, a cover strip, preferably of paper, 7 may be fed in between the cover sheets 1 and 2 along the exterior of the edges of the body. This strip will become attached to the composition body, form an additional assurance that the body 5 will continue uninterrupted to the edge, and will form an additional protection to the edge during fabrication, transportation and application. What I claim is:

I. A wallboard having a plaster com osition body and upper and lower cover s eets reinforcement alon each longitudiy turning back constructed continuously in, a machine,v

the edges of the cover sheets upon themselves.

2. A wallboard having a rigid composition body and upper and lower cover sheets.

4. A wallboard having a rigid composii tion body and upper andlower cover sheets with reinforcements alon each of the longitudinal edges thereof, ormed by turning back the edges of the cover sheets u on themselves onthe interior and imbeddmg the turned back edges in the body.

5. A wallboard having a composition body and upper and lower cover sheets with reinforcements along the longitudinal edges thereof, formed by turning back the edges of the cover sheets u on themselves on the interior, imbedding t e turned back edges in the body, and a cover strip attached to the plastic body between the opposite longitudinal edges of the cover sheets.

CHARLES R. BIRDSEY.

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