US 3139627 A
Description (OCR text may contain errors)
July 7, 1964 H. l.. RICE LINER FOR A SHOWER STALL om u. A w
n f v MSW United States Patent O 3,139,627 LINER FOR A SHOWER STALL Harry Lawrence Rice, deceased, late of New York, N.Y.,
by Helen Rice, Administratrix, New York, N.Y., assignor to Rubber and Plastics Compound Co., Inc., New York, N.Y.
Substituted for abandoned application Ser. No. 28,965, May 13, 1960. This application Aug. 8, 1962, Ser. No.
This invention relates to wall construction and, more particularly to walls of enclosures for showers, commonly known as shower stalls.
An object of this invention is to provide a new shower stall construction wherein a continuous barrier is placed between the outer subfloor and the inner tile floor and between the inner tile wall and the outer wall to prevent the splash of the shower from seeping through the subfloor and through the outer wall.
Another object of this invention is to provide such a barrierwhich is formed of a single material and which is waterproof, damp proof and corrosion resistant.
Another object of this invention is to provide such a barrier which is fungus and mildew proof and is resistant to vermin and rats.
Another object of this invention is to provide such a barrier which can be formed in situ or can be preformed and placed in a wall construction which is characterized by structural simplicity, ease of construction and low cost.
Further objects of the present invention will be evident from the following description of the embodiment of the invention as illustrated in the accompanying drawing in which:
FIG. l is a fragmentary section plan view of a portion of one embodiment of the present shower stall construction.
FIG. 2 is a perspective view of preformed barrier used in the shower stall of the present invention.
FIG. 3 is a perspective view of a barrier formed in situ by folding from a single sheet along the lines marked thereon.
FIG. 4 is a plan view of the construction shown in FIG. 3 before folding, showing marking lines for folding.
Before describing in detail the herein disclosed embodiment of the invention, it is to be understood that the present invention is not limited to this embodiment but the scope of the invention is limited by the appended claims.
The prevailing practice in the construction of shower stalls consists in the use of barrier sections made from metals such as lead, zinc, copper and aluminum, upon a concrete base. The resulting barriers have shown themselves to be inadequate in regard to seepage prevention and to long use. This can well be appreciated when one observes the vulnerability of the above mentioned highly reactive metals when brought in direct contact with green, wet or damp concrete. Moist calcium carbonate, formed by the interaction of water and Portland cement, will deteriorate a lead barrier by rapid corrosion, particularly during the period of curing of the cement into concrete. In order to cope with this corrosion, it is common practice to use a heavier thickness of the metal in order to allow a margin for this metal corrosion attack. This results in excessive costs besides the fact that the lead continues to corrode in spite of the extra thickness employed.
To overcome this difficulty, it is frequently necessary to resort to imbedding the lead in layers of asphalt, varnish, pitch or in a wrapping of jute with bitumen, placed between the lead and the concrete. However, it has been found that the Portland cement solids, as well as the alkalis used in the showers slowly emulsify the protective 2 Claims.
3,139,627 Patented July 7, 1964 When copper is used as a barrier material it is subject to the above mentioned hazards. In addition, solder must be used to seal the joints. Since solder contains zinc, the corrosion of the joints and barrier by the wet concrete materials is accelerated. In case of fire the solder melts, destroying the water barrier properties.
In the invention the abovementioned difficulties such as corrosion, water seepage and fire hazards are eliminated resulting in a unitary structure which is corrosion proof, water proof, mildew proof and fire proof. This is accomplished by using a rigid, organic, formed plastic pan, shaped as shown in FIG. 2 and set to the wall structure and on the floor as shown in FIG. l. The stall is formed from a thermoplastic or thermosetting, heat or cement scalable rigid sheet which is made from moisture impervious material such as vinyl chloride, Vinylidene chloride, polyethylene, cellulose butyrate, polystyrene, melamine, epoxy and polyesters, which may be sheeted, calendered or extruded, and is capable of being preformed or rendered rigid.
One of the features of such a shower stall made from this type of plastic is that it can be heat sealed unto itself or cemented to and with the same type of plastic material, using as a cementing means such material dissolved in ketones such as methyl ethyl ketone or self curing epoxy cements. Shower stalls made of thermosetting materials are re resistant, vermin proof, odorless and safe from the molestation from rats and have an integral structure.
Referring to FIG. 1 a fragment 1 of the plastic shower stall (FIG. 2) is shown in place above a wooden subfloor 2 next to the masonry wall 3. The inner surface of the shower stall is lined with a welded wire fabric 4 which serves to retain the Portland cement grout 5 to which is secured the iioor tile 6 and the wall tile 7. It is evident that the plastic shower stall effectively serves as a barrier to prevent water from seeping through the cement and tiles to the wooden sub base.
To install the plastic shower stall upon a concrete foundation, the stall can be secured to the concrete by simply grouting in with a Portland cement mortar, consisting of l part Portland cement, 1/10 part of lime and 3 parts of sand, together with the necessary amount of water admixed to provide a trowelable well mixed mortar, which is spread for a thickness of 2. For the purpose of cementing this plastic waterproof shower stall to a wooden floor base, a solvent cement containing the plasticized ingredients of a polyvinyl resin, tackiiers and a ketonic solvent, such as methyl ethyl ketone, is employed at the rate of spread of to 100 square feet per gallon.
Fabricating of the stall, before the actual emplacement upon or atop of the base of surface for which it is intended, can be accomplished by preforrning, precasting or premolding. It can also be accomplished easily and readily at the job site, as follows:
The flat sheet of plastic is cut to the required overall length and width and marked as in FIG. 4. It is then folded into the shape of the completed stall (FIG. 3), including the lower pan 8', sidewalls 9', rear wall 10', sill 11', side wall covers 12' and sill cover 13. The inner surfaces of the pockets of the folds 14 and 15 in FIG. 3 are cemented to each other with a waterproof cement.
In shaping or forming the barrier it is important to so make the sides of the stall to allow for sufficient barrier height of turned up material along the sidewalls, and to have the wall corresponding to the sill cover, correspond to not less than three inches above the rough curb, sill,
Maase? dam or threshold. This three inch extension should ap over the sill and be cemented thereto. The corners of the stall should be folded so that the pan formed thereby can be square on the inside, for laying tile thereon. For
removal of Water when showering, a clamping ring type of subdrain with Weep holes is inserted in the drain hole 16. A screw type of subdrain can be used provided the compression ring is lubricated or sealed. It is obvious that a barrier can be formed similar to FIG. 3 without the sidewall covers 12 or without the sill cover 13'. In the latter case the sheet in FIG. 4 is completely rectangular without the extension 13'. After the stall is placed in position, right angular strips can be cemented to the barrier to serve as side Wall covers or as a sill cover.
What is claimed is:
1. A substantially rectangular impervious sheet having two longitudinal lines marking ofIr the sheet into three substantially equal panels, the center panel being slightly longer at one end than the other two panels by a distance equal to a curb width, a marking across the center panel defining the extra length, two transverse markings at the ends of the panels near the eXtra length, the nearer one of the transverse marks being about as far from the ends of the outer panels as the farther end of the center panel, and the second transverse mark being substantially as far from the first transverse mark as the Width of the panels, said sheet being foldable along the markings to form a shower stall liner.
2. A substantially rectangular impervious sheet having two longitudinal lines marking oi the sheet into three substantially equal panels, the center panel being slightly longer at one end than the other two panels by a distance equal to a curb width, a marking across the center panel defining the extra length, two transverse markings at the ends of the panels near the eXtra length, the nearer one of the transverse marks being about as far from the ends of the outer panels as the farther end of the center panel, and the second transverse mark being substantially as far from the rst transverse mark as the Width of the panels, and diagonal markings extending from the rst transverse mark at the outer sides of the outer panels to the second transverse mark at the inner sides of the outer panels, said sheet being foldable along the markings to form a shower stall liner.
References Cited in the file of this patent UNITED STATES PATENTS 2,087,121 Samelow July 13, 1937 2,484,240 Morthland Oct. 1l, 1949 2,697,231 Strand Dec. 21, 1954 2,757,385 Whittick Aug. 7, 1956 2,899,687 Rossetti et al Aug. 18, 1959 2,962,405 Morthland Nov. 29, 1960 FOREIGN PATENTS 1,196,215 France May 25, 1959