US3639922A - Cushioned toilet seat - Google Patents

Abstract

This invention comprises a cushioned toilet seat in which a foam rubber cushion element is superimposed upon a rigid base member of annular configuration, and a plastic skin is vacuum formed thereabout with lapped over heat-sealed joints at the marginal edges of the base member. Apertures in the bottom of the plastic sole sheet communicate with channels extending through the base member to permit air entrapped within the cushion to be expelled when the skin is compressed against the cushion.

Description

I United States Patent 1151 3,639,922 Samuels et al. 451 F b, 3, 1972 [54] CUSHIONED TOILET SEAT 2,771,612 11/1956 Samuels ..4/237 2,899, 89 8 1959 P H [72] Inventors: Stanley J. Samuels, 2031 Locust St.; 3 33] 8 72967 zi H Samuel same, 1801 Mm Kennedy 3 517 396 6 1970 Wart ..4/113 Blvd., both of Philadelphia, Pa. 19103 l 22 Filed: Feb. 17, 1970 Primary g m Artis Att0rneyB1lker and Kimmelman [21] Appl. No.: 14,858

Related U.S. Application Data ABSTRACT [62] July 1967 This invention comprises a cushioned toilet seat in which a foam rubber cushion element is superimposed upon a rigid base member of annular configuration, and a plastic skin is [52] U.S. Cl ..4/237 vacuum formed thereabout m-th lapped over heatsealed [51] hit. Cl. ..A47k 13/00 joints at the marginal edges of the e member Apertures in [58] Field of Search ..4/234, 237, 235, 239, 242, the bottom f the plastic Sole Sheet communicate with cham 4/l 1 273, 235 nels extending through the base member to permit air entrapped within the cushion to be expelled when the skin is [56] References Cited compressed against the cushion.

UNITED STATES PATENTS 3 Claims, 5 Drawing Figures 2,247,337 6/1911 liafiovichiliulll .QI. 4/237 UX PATENTED FEB 8872 SAMUE'LS INVENTORS. STANLEY J. SAMUELS SAMUEL ATTORNEYS.

CUSHIONED TOILET SEAT This is a division of Pat. application Ser. No. 654,883, filed July 20, 1967, now U.S. Pat. No. 3,513,050.

BRIEF SUMMARY OF THE INVENTION This invention relates to a cushioned or padded toilet seat, and more particularly relates to a new and improved method for fabricating such a seat.

In U.S. Pat. No. 2,771,612, there is shown a cushioned toilet seat which employs an annular base member, an annular cushion element, and a plastic skin of vinyl composition stretched taut thereabout and heat-sealed at the edges. In the former patented construction, the cross section of the base was generally semicircular in configuration but having a truncated or flat top and a flat bottom. The edges of the planoconvex cushion element overhang the arcuate sides of the base, and the heat seals of the skin or facing were formed at the corners. One of the problems encountered in the prior construction was a failure produced at the corners after some use, primarily because of the stresses produced in the end-to-end heat-sealed arrangement. The prior construction was performed in a laborious piece-fitted manner which involved heat-welding first the interior'edges of the plastic by drawing a heated tool or iron peripherally around the inner edge and then repeating the procedure by drawing the iron about the outer edge.

The instant device is produced in a single heat-sealing operation after the plastic is uniformly shaped in a mold into the exact configuration of the seat so that minimal stresses occur. The heat seals themselves are made in lapped-over margins thereby eliminating sharp corners which are subject so often to failures and which are prone to cause discomfort to the user.

It is therefore an object of this invention to provide a new and improved cushioned toilet seat which will have increased resistance to heat-seal failures.

Another object of this invention is to provide a cushioned toilet seat of a more durable construction with improved comfort to the user.

Still another object of this invention is to provide a cushioned toilet seat in which minimal stresses will occur dur ing use without detracting in any way from the attractive appearance of a conventional toilet seat.

Yet another object of this invention is to provide a method for making a cushioned toilet seat in which all of the heat seals are accomplished simultaneously.

A still further object of this invention is to provide a cushioned toilet seat in which trapped air will be freely expelled when pressure is applied to the seat by the weight of a person's body.

Yet a further object of this invention is to provide a method for making a cushioned toilet seat in which there will be no exposed sharp edges.

Other objects of this invention are to provide an improved device of the character described which is easily and economically produced, which is sturdy in construction, and highly efficient and effective in operation.

DESCRIPTION OF THE FIGURES With the above and related objects in view, this invention consists of the details of construction and combination of parts as will be more fully understood from the following detailed description when read in conjunction with the following drawing in which:

FIG. 1 is a perspective view of a cushioned toilet seat embodying this invention.

FIG. 2 is a sectional view taken along lines 2-2 of FIG. 1.

FIG. 2A is a sectional view taken along lines 2A-2A of FIG. 1.

FIG. 3 is a sectional view of a vacuum-forming apparatus showing the initial steps of our method for fabricating the cushioned toilet seat by this new and improved method.

FIG. 4 is a sectional view of the vacuum-forming apparatus and heat sealing equipment used in the final steps of this new and improved method.

Referring now in greater detail to the drawing in which similar reference characters refer to similar parts, we show a cushion toilet seat comprising a base member, generally designated as A, a cushion element, generally designated as B, and a plastic skin generally designated as C, encapsulating said base and cushion members.

The seat may be of any conventional configuration, and includes where practical a back 10 which is hinged to the sitting portion. The base A in the illustration shown is of elliptical annular design and may be made of wood, pressed wood or molded from a plastic composition. It is planoconvex in cross section having a flat bottom 12 and a substantially arcuate top 14. The cushion element B is also of elliptical annular configuration but is crescent-shaped in section having a concave wall 16 complementary with the base surface 14 and an upper convex wall or surface 18. The cushion B is fabricated from a resilient element such as foamed latex or blown rubber sponge molded into the annular concavo-convex configuration whereby the conconcave surface 16 will conform to the entire surface 14 of the base A. The skin is formed from a plastic sheet such as calendered vinyl" and includes a facing portion 20 and an under portion 22. The facing portion 20 has interior and exterior marginal edges 24 and 26 which underlie the bottom margins of the base surface 12. The under portion 22 is of substantially the same size and shape as the base surface 12 so that its perimetrical portions lap over the margins 24 and 26.

The vacuum-forming apparatus D is shown in FIGS. 3 and 4 and includes a mold platen 30 having an annular cavity 32 therein which conforms to the size and shape of the arcuate portion of the seat which is to be ultimately formed. A plurality of pinhole ports 34 are incorporated throughout the surface of the cavity 32 and communicate with an interior manifold 36 through channels 38. The manifold 36 is connected to a source of suction, such as a vacuum pump, through pipe coupling 40. A vertically reciprocable platen plate 42 is supported by a ram, not shown, in a conventional manner so as to be adapted to be moved into contact with the mold platen with predetermined pressure. The platens 30 and 42 are also coupled to a high'frequency generator, such as a dielectric induction heater made by Dynatherm Division of Guild Electronics, Inc., of Brooklyn, NY. As is well known, when the platens have high frequency applied thereto, a dielectric material interposed between the platens will heat up by the internal friction induced in the molecular configuration.

As may be apparent from the foregoing description, the steps of fabricating the toilet seat of the instant invention are as follows: A rectangular sheet of plastic, such as polyvinyl chloride, is draped flat over the upper surface of the mold platen 30, and its perimeter is clamped tightly in a frame or hoop 44 about the edges of the mold. The sheet or facing 20 is elevated in temperature by exposing it to dielectric heating until it just begins to soften as determined by slight wrinkles appearing in the face thereof. The heat can also be applied by means of infrared heat lamps for the softening operation.

Vacuum is now applied to the mold cavity by connecting the source of suction by suitable valve means to the pipe coupling 40 and thence to the ports 34 through manifold 36 and channels 38. The softened facing sheet 20 will be drawn down into face-to-face contact with the mold cavity 32 and vacuum formed into the configuration thereof. The vacuum and heat are then discontinued.

The outer periphery of the sheeting 20 is cut away with a knife or biscuit cutter leaving the outer margin 24 lying outside the cavity 32 and shaped concentrically thereto. Similarly, a central aperture 25 is removed intermediate the inner margins of the cavity to leave interior marginal portions 26. The cushion element B and the base A are next laid over the formed sheet in the cavity as shown in FIG. 3. The margins 24 and 26 are turned over the edges of the base surface 12 so as to lie flat thereon. The under sheet is then laid over the lapped over margins 24 and 26 and carefully spread flat thereupon. The heating platen 42 is pressed into face-to-face contact with the under sheet 22 with a predetermined force, and the high-frequency generator turned on. The dielectric heat generated in the plastic while under pressure causes a heat-sealed weld to be produced in the lapped joint. The entire seat is then removed from the mold cavity, and the edges of the under face 22 sanded down until smooth.

It is to be observed that with the encapsulation of the base A and especially the cushion member B within the plastic skin, entrapped air will cause internal pressure to be built up against the interior surfaces of the skin when the latter is compressed such as by sitting. Accordingly, we provide a means for releasing this entrapped air by way of concealed vents. Referring to FIG. 2A, the venting is accomplished under bumpers 46 which are a conventional pan of the seat itself. The bumpers 46 are generally molded parts of hollow interior construction and having pins 48 upstanding therefrom for engagement within spaced drilled apertures in the under part of the base A. The base A also has a series of internal channels 50 drilled entirely therethrough so as to allow the chamber 52 within the bumpers 46 to freely communicate with the cushion element B. Openings 54 in the shell of the bumpers 46 allow the venting of the chamber 52 to the atmosphere. Therefore, when the skin C is compressed, the air within the cushion element B is allowed to breathe freely and pass out without causing internal stresses to build up. The lapped over joint 24 and 26 produces a strong heat-sealed weld which is extremely strong and which does not detract in any way from the appearance.

Although this invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

We claim:

1. A cushioned toilet seat comprising a rigid base member of generally annular configuration and having a flat bottom surface, a foam rubber cushion element coextensive with said base member and complementary with the upper surface thereof, a sheet plastic facing overlying said cushion element and having interior and exterior marginal edges, and a sheet plastic sole having a configuration substantially identical to the bottom surface of said base member and having marginal edges in heat welded disposition with the respective marginal edges of said facing at the inner and outer peripheries of said base member whereby said base member and said cushion ele ment are encapsulated within a taut plastic skin, and channels in said base member extending from the bottom surface to the upper surface thereof, and apertures in said sole respectively communicating with the channels whereby compressing said skin against said cushion element will permit air entrapped therein to be expelled through the apertures.

2. The invention of claim 1 including bumpers secured to the bottom of the seat directly over the apertures, and ports in said bumpers extending therethrough and communicating with the apertures, whereby the apertures are concealed.

3. The invention of claim 2 wherein said bumpers are of hollow construction.

Claims (3)

1. A cushioned toilet seat comprising a rigid base member of generally annular configuration and having a flat bottom surface, a foam rubber cushion element coextensive with said base member and complementary with the upper surface thereof, a sheet plastic facing overlying said cushion element and having interior and exterior marginal edges, and a sheet plastic sole having a configuration substantially identical to the bottom surface of said base member and having marginal edges in heat welded disposition with the respective marginal edges of said facing at the inner and outer peripheries of said base member whereby said base member and said cushion element are encapsulated within a taut plastic skin, and channels in said base member extending from the bottom surface to the upper surface thereof, and apertures in said sole respectively communicating with the channels whereby compressing said skin against said cushion element will permit air entrapped therein to be expelled through the apertures.

2. The invention of claim 1 including bumpers secured to the bottom of the seat directly over the apertures, and ports in said bumpers extending therethrough and communicating with the apertures, whereby the apertures are concealed.

3. The invention of claim 2 wherein said bumpers are of hollow construction.

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