US1268802A - Plaster-board. - Google Patents

Description

1I. E. SCHUMACHER.

PLASTER BOARD.

APPLICATION FILED MAR. I6."I9I7.

l ,268,802 Patented June 4, 1918.

INVENTEIR,

g SJW/- H S. ATT DFINE'IY v of other instrumentalities utilizedin form- JOSEPH E. SCHUMAGHER, 0F LOS ANGELES, CALIFORNIA.

'BLASTER-BOARD.

Specification of Letters Patent.

Patented J une d, 191%.

Application filed March 16,` 1917. Serial No. 155,233.

To all 'whom t may concern.'

Be it known that I, JOSEPH E. SCHU- MACHER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, haveinvented a new and useful Improved Plaster- Board, of which the following is a specification.

This invention relates to an improved article of manufacture and method of producing the same, and more particularlyT to an improved plaster board or plaster lath and method of making same. The invention has for its object to provide an improved article of manufacture consisting of such plaster board or plaster lath, which will be superior in point of simplicity and inexpensiveness ofconstruction and constitution, which will be superior in durability and length of life, and which at the same time may be employed more effectively in conjunction with a further wall element, such as a plaster coating, to support the latter.

The invention likewise has for further objects the provision of such improved plaster board or plaster lath as may be inexpensively produced and put into condition for service in conjunction with such further wall element, and likewise to provide a simple and eicacious method for the production of such article of manufacture.

With the above and other objects in View, the invention consists in the novel and useful formation and construction and organization of parts and features and the novel and eicacious method of producing -the same, all as hereinafter described, shown in the drawing and finally pointed out in claims.

In the drawing:

Figure 1 is a fragmentary face ."iew of a sheet or slab of plaster board or plaster lath constructed, constituted and produced in accordance with the present invention;

Flg. 2 is an enlarged detail sectional view of the same, taken upon the line :r2-m2, Fig.-

1, and looking inthe direction ofthe appended arrows;

Fig. 3 is an enlarged view of a sheet or slab of `such plaster board or plaster lath and ing andl producing the same, or completing the same in the condition` and formation shown in Figs. 1 and `2. Fig. 4 is a working end or face view of the punch member-0r device shown inFig. 3;

Fig. 5 is a view similar to Fig. 1, of a modied form of the invention; and

Fig. 6 is av-iew similar to Figs. 1 and 5, of a still further modified form of the invention.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity to the drawing, the improved plaster board or plaster lath is initially produced, in accordance with any preferred method or process, and comprises a body or filler a of cementitious or plastic material, which is disposed between face sheets b and c of paper or other suitable material which effectively' confines and preserves the unity of the filler or body a during the setting or hardening thereof. Such a plaster board or plaster lath is wellknown in the art, and the present invention relates particularly to certain features resultant upon or produced by modification or alteration of the continuous or imperforate formation of such plaster board or plaster lath sheet or slab, together with the method of procedure for producing such modification. It is understood of course that. in order to perform the function of plaster lath, the article of manufacture comprising the filler or body a. and the surface sheets or strips b and c must be provided with suitable irregularities of surface formation, or openings or holes or crevices or the like for the reception of the plastic or cementitious body, or further wall element, to be applied 'to such lath, so that an effective interlocking may result as between such further wall element and the lath. In accordance with the present invention, I provide through openings, 5, in the otherwise imperforate plaster board, such openings being preferably or at least effectively of constant transverse d1- mension, or cylindrical, such transverse holes or openings being conveniently and effectively produced by a suitable punch device A, as illustrated in Fig. 3, with which `coperate dies B and C. In practice, such dies are placed in facial contact with the plaster board article D, and one such die has abore 6 to receive the punch 7 in approximately a working fit, whereas the bore 7 of.

the7 .other die is of a materially increased diameter, they punch being first entered in the die B, and entering the die C after penetration of. the plaster board article D. `Such penetration is preferably produced by the joint use of the punch and the dies prior to the placing the plaster board in position, so that the plaster board or plaster lath may be supplied in finished and completed form, ready to be installed and to receive the plaster coating or other wall element to be applied to the same. The punch 7 makes a c ean hole in itsA first penetration of theplaster board D, but as the punchin' operation proceeds toward the die C whlch fails to confine and su port the plaster board closely up to the ielod of punching operation, but supports the main body of the plaster board laterally, or outwardly thereof, the penetrating pressure of the punch tends to advance the material of the plaster boardy with the punch into the bore of the die C,

or, in other words, to buckle the plaster y board to the breaking point or to disrupt the into ragged and spaced tongues or ribbons,

which. initially are directed into the bore of the d1e C. Upon the 'withdrawal `of the punch 7 the roughened condition or formation, as at 8, persists in the inner walls 'of the through hole 5, andthe slight inherent spring quality in the tongues 9 of the broken facial sheet Z tends to restore the same to or toward the plane of the sheet b.v The dies Band C are now removed from the er# forated plaster board, and a succee ing punching operation ensues to' produce the pluraity of through holes 5 indicated in If-the punched or perforated plaster board sheets be stacked upon each other, as produced, there will be a tendency to restore the tongues or ribbons 9 of the paper b substantially to the planof such paper sheet.

The plaster board D has nowin effect been altered or modified so that it constitutes plaster-lath, and is prepared to receive the plastic or cementitious further Wall coating or element which `may be applied to the same in any suitable manner', and to the face thereof which is provided'with the relatively clean-cut or perforated paper sheet or facial covering 0. Such ap lication of Such plastic or mobile -or mus material will result in penetration there y `of the holes or through openings 5, which will produce tongues or keys eventually hardening and Vsetting within such openings to interlock the further wall element with the plaster lath and cause the same to be effectively .supported-and retained thereby. As such I' ings will be produced, preventing an'over-4 plus of such mushy or plastic material from passing through such openings and being wasted beyond or behind the lath. With the same effect, the' tongues or ribbons 9 of the paper sheet b act in retardation or to check the passage of such wall material through such holes 5. A sutlicient quantity of such material, however, protrudes through the holes 5 and between the tongues or ribbons 9, and over and beyond and past the roughened or altered formation at 8, to produce a key or button beyond the surface sheet b, which, when hardened, positively and effectively, with its shank within the opening 5, prevents separationAof the wall coating or coverin from' the plaster lath; and such shank e eotively interlocks with the roughened and altered or mutilated formation of the wall of the. hole 5, adding to the eiiiciencyof such interlocking action,

and inherent stability of the entire resultant l wall structure,- plaster-toeplaster or contacting engagement within these openings, of

'moist plaster with dry plaster, resulting likewise in a close adhesive joint within suchA openings. All of these interlockin or inter-related actions serve far more e eotively to unite the further wall elementwith the lath than would be the case if the holes 5 were perfectly cylindrical or had smooth Wall portions, or if the paper sheet b were cleanly pu'nched through and the tongues or ribbons 9 not allowed to remainjin/position. The substance of the further wall ele- `mentV likewise surrounds and embeds to a certain extent such tongues or ribbons 9,

` which likewise further lacts as bonds to interlock such tongues with theplaster lath. The paper tongues 'or ribbons 9 will of course 1e1d outwardly as the tongue or key of wal material presses against the same,

permitting such Amaterial to be projected beyond the plaster board; or, if the finished plaster board or plaster lath 'sheets Eare stacked up prior to use, and such tongues or rlbbons maintained' substantially in the plane of the paper covering b, they will tend t'o re-assume the slightly outwardlyangled positions shown in Fig. 2, due to an inherent tendency in that direction caused by the punching action. In any event, whether said tongues lie within the plane `of the papercovering b, or are angled outwardly w1th respect to such plane, lwhen the Wall material is applied to the lath, they 130 will serve somewhat to retard the intruding plaster key, as well as to unite with the same 1n bonding action.

As shown, punch 7 is provided with a tapered end portion producing facets or end faces 10 separated by cutting edges 10a; but it will be understood that any suitable work* ing end formation of such punch may be employed.

A further coating of plaster or other material may be applied to the reverse side of the lath, the heads formed by the protruding plaster previously applied interlocking with said plaster coating and firmly supporting the same. As shown in Fig. 5, an effective form of hole 5 comprises a triangular perforation producing tongues 9 which more closely overlap the hole and check the protruding plaster while yielding sufficiently to permit the formation of heads for the purposes above described. As shown in the uppermost hole in Fig. 2, a suitable punch may be employed to cause mutilation of the first produced end of the hole on retraction of such punch, for further interlocking purposes.

It is manifest that many variations in detail and in specific character may be. made, in departure from the foregoing description and statement and the showing of the drawing in adapting the invention, either with respect to the plaster lath itself or the method of its production, to varying conditions and requirements of use and service, all without departing from the real characteristics of the invention and a fair interpretation of the spirit thereof.

Having thus disclosed my invention, l claim and desire to secure by Letters Patent:

l. As an improved article of manufacture, a plaster lath. comprising a body of initially plastic material and facial sheets of fiexible material between which such body is disposed; there being a plurality of through openings produced through such sheets' and said body and confined by roughened or mutilated Walls; one of said surface coverings being disrupted in registration with each of said openings to produce irregular tongues overlying the same.

2. As an improved article of manufacture, a laster lath provided with perforations, said ath com rising a body and surface sheets between w ich the body is interposed; one of said surface sheets being disrupted in the production of the perforations to provide tongues overlying one end of each perforation to partially and yieldingly seal the same.

3. Plaster board comprising surface sheets of flexible material and a body of plastic material disposed between and uniting the sheets, one of the sheets and said body having registering openings and the other of said sheets having openings therein registering with and being smaller than the openings of the first sheet and body, said last named openings having irregular confining walls.

4. Plaster board comprising surface sheets of iexible material and a body of plastic material disposed between and uniting the sheets, one of the sheets and said body having registering openings and the other of said sheets having openings therein registering with and being smaller than the openings of the first sheet and body, said last named openings having irregular confining Walls, defining irregular tongues lying in approximately the same plane as the last named sheet.

5. An improved article of manufacture, a structurally completed plaster board comprising surface sheets united by a plastic body and having through openings formed therein, one of the surface sheets of said board being formed to substantially and yieldingly close the openings at certain ends thereof.

6. A structurally completed plaster board having through openings provided therein and one of its elements so formed as to materially and yieldingly retard the movement and the amount of wall material adapted to pass therethrough when the latter is applied to the board and extends into and through the openings.

7. A structurally completed plaster board having through openings provided therein and one of its elements so formed as to magli:

terially retard the movement and the amount of Wall material adapted to pass therethrough when the latter is applied to the board and extends into and through the openings; Said element substantially and yieldingly closing one end of each of the openings.

8. A plaster board provided with through openings therein, and means for yieldingly holding certain ends of the openings closed and which act to open under the iniuence of y plastic material applied to the board and which enters the openings.

9. A plaster board provided with through openings therein, and means for yieldingly holding certain ends of the openings closed

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