Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1970803 A
Publication typeGrant
Publication dateAug 21, 1934
Filing dateOct 3, 1932
Priority dateOct 3, 1932
Publication numberUS 1970803 A, US 1970803A, US-A-1970803, US1970803 A, US1970803A
InventorsJohnson John Herbert
Original AssigneeJohnson John Herbert
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of making an inflatable rubber structure
US 1970803 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Aug- 21, 1 J. H. JOHNSON MFPHOD OF MAKING AN INFLATABLE RUBBER STRUCTURE Filed Oct. 3, 1952 Patented Aug. 21, 1934 METHOD or MAKING AN INFLATABLE PATENT orrlca S RUBBER STRUCTURE John Herbert Johnson, Toronto, Ontario, Canada Application October 3, 1932, Serial No. 636,086 3 Claims. (01. 154-2) The principal object of this invention is to provide a form of inflatablerubber goods, the in terior 01' which will be sub-divided into a ,plurality of individual air chambers, each of which may be inflated to a particular pressure in accordance with requirements and in the provision of means for controlling the expansion of the air chambers. I

A further and important object is tosimplify the-production of a product of this nature and to provide an integral structure throughout.

\The principalfeature of this invention consists in the hovel construction and method of fabricating wherein the extensible side walls of the inflatable device have permanently united therewithjduring the vulcanizable process, extensible rubber strips which serve to subdivide the interior into a plurality of separate compartments and which serve to control the outward flexing of the sides.

In the drawing, Figure 1 is a plan view of an inflatable unit constructed in accordance with this invention and showing the central portion broken away.

Figure 2 is a cross section on an enlarged scale through a portion of the structure shown in Figure 1.

Figure 3 is an enlarged detail sectional view illustrating the disposition of the extensible partition element. and the manner of fabricating.

Figure 4 is a sectional perspective view of a mattress illustrating the present invention applied thereto. T

Figure 5 is an elevational part sectional view of a mattress shown in Figure 4 showing the disposition of the elements in their inflated form.

Figure 6 illustrates a modified form of construction.

Rapid progress has been made recently in the production of inflatable rubber goods.

The present invention proposes a distinct advance over what has been done heretofore and it is a purpose of the present invention to overi come objections associated with former structures and to enable the economic production of a cushioning element or the like which may carry different pressures of inflation at various points within its interior and which will not be subject ""to undesired lateral. expansion, permitting the retention of higher pressures than heretofore. In the form'of construction illustrated in the drawing, a pair of rubber'sheets 1 and 2 are a first provided of the desired shape and size, such sheets being in unvulcanized form and between these sheets are placed a plurality of paper sheets 3 corresponding to the number oi compartments it is desired to form. The dimensions of these sheets are such that they permit the outer edge portions of the rubber sheets to contact with each other and they are preferably perforated at a plurality of points-to permit contact of the rubber sheets during subsequent vulcanizing at" the points 4. g

Strips 5 of unvulcanized rubber are doubled intermediate of their width and inserted between the rubber sheets 1 and 2 in the manner illustrated in Figure 3, these stripsbeing preferably placed to conform to the dotted line indication of Figurel, t.

The paper strip 3 as shown extends into the apex of the doubled strip 5 and thus serves to prevent surface contact of the opposing portions of the 'strips 5. w

Strips of paper 6 are doubled intermediate of their width and placed as indicated in Figure 3 so that the respective free portions thereof extend between thesheets 1 and 2 andthe adjacent convergent sides of the doubled rubber strip 5. The strips 6 are so placed that the edge extremities '7 thereof terminates at a point from the so edge extremities 8 of the doubled rubber strip-5 so that the longitudinal edge portion of the strips 5 not covered by the paper strip 6, is permitted to contact with the overlying rubber sheets 1 and 2.

It will thus be seen that by applying pressure and vulcanizing temperature to the composite structure thus produced that the outer sheets 1 and 2 will be permanently united at all points where they are permitted to come into contact, and that the doubled rubber strips 5 will also become integrally united at their points of contact with the rubber sheets 1 and 2 so that'the interior of the resultant product will be very positively sub-divided into separate, air-tight compartments.

It will be further noted that the presence of the doubled rubber partition strips 5 in the completed structure, will serve not only to sub-divide the interior into the desired compartments, but its presence will eifect a very definite control of the expansion of such chambers when inflated as will be apparent on reference to Figure 5.

Each of the interior compartments thus provided is preferably provided with a valve inlet 9 extending through the projecting lug formation 10 of the sheets 1 and 2.

Thus, when the structure described is applied to a mattress as illustrated in Figures 4 and 5, a very accurate control of the inflation and cushioning properties is provided for, and where a tendency for the mattress to sag in the middle. is encountered, as is frequently the case, the central compartment is simply inflated to a greater degree than the outer compartments and a similar control can be eifected where persons of greatly diflfering weights are obliged to lie on the same mattress. In the form of construction illustrated, in Fi ure 6, a pair of rectangular strips of paper 11 are placed in juxta-position between the two outer rubber sheets and a plurality of doubled rubber strips 5 are placed in a rectangular arrangement in spaced relation to the sides and ends of the outer rubber sheets, the apex of these doubled rubber strips being disposed outwardly and the paper strips 11 are of such a width that the inner edge 12 thereof terminates a short distance from the inner edge 13 of the doubled rubber strips 5'.

A- strip of paper 1'1 of rectangular form is also placed between the outer rubber sheets and centrally thereof so that its outer edges 18 extend between the doubled rubber strips and into the inner apex thereof so that only the outer portions of the doubled rubber strips adjacent the longitudinal edges 12 are permitted to contact with the outer rubber sheets so that they will be permanently vulcanized at this point to the outer sheets in the subsequent vulcanizing operation.

It will thus be seen that with this construction, when the deviceis inflated the lateral pressure on the side walls will extend the doubled rubber strips drawing outwardly on the connected' edge portions 16 so that the apex portions thereof will move inwardly as the strips 5' straighten out, thus closing together at the corners and forming a distinct air chamber centrally of the device. The formation of a separate air chamber in this manner prevents rapid displacement of the air from one section to the other when pressure is applied to one part such as is occasioned when the device is used as a cushion and the presence of the connecting strips 5 will inhibit the undesired tendency of a device of this nature to roll or become unsteady when weight is applied.

It will be readily appreciated that many variations may be made in the actual construction while still remaining within the scope of the invention.

What I claim as my invention is:-

l. A method of producing inflatable rubber goods comprising placing a plurality of preformed unvulcanized rubber sheets in juxtaposed relation, placing a plurality of doubled partition strips of unvulcanized rubber between said sheets, placing separating strips of paper between said sheets arranging same to overlie the doubled strips on their opposite outer sides leaving marginal edge portions of the sheets and strips exposed for direct inter-contact, placing second strips of paper between said sheets on the opposite side of the doubled strip and arranging same to extend between the doubled portions of the rubber strips with the first-mentioned paper strips disposed in overlapped relation thereto, and applying heat and pressure to vulcanize the composite structure and permanently unite the intercontacting surfaces.

2. A method of producing inflatable rubber goods comprising placing a plurality of preformed unvulcanized rubber sheets in juxtaposed relation, doubling a plurality of strips of unvulcanized rubber longitudinally, placing said doubled strips between the juxtaposed sheets in a substantially rectangular arrangement with the apex portion of the doubled strips disposed outwardly in the direction of the marginal edges of the sheets and with the free edges thereof substantially clear of each other, interposing sheets of paper between the rubber sheets to extend to the outer sides of each of the doubled strips leaving the inner longitudinal free edges of the latter free to contact with the sheets and leaving the outer marginal edges of the sheets free to contact with each other, placing a separate sheet of paper between the sheets to extend between the doubled strips, and applying heat and pressure to integrally unite the composite structure at the points of contact of said sheets and strips.

3. An improved method of producing inflatable rubber goods of the type in which superposed outer sheets are sealed together at the edges and the interior space is subdivided by a plurality of partition strips permanently united along their marginal edges to the sheets, comprising the step of associating with each rubber strip a set of paper separating sheets, placing said separating sheets between the rubber sheets on opposite sides of the rubber strip with the rubber strip interposed therebetween and with the marginal edge portions of the paper sheets of each set overlapping each other a distance less than the width of the interposed rubber strip, ,then vulcanizing under pressure.

JOHN HERBERT JOHNSON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2515806 *Sep 16, 1948Jul 18, 1950Abraham N SpanelMethod of constructing a utility device for infants
US2606076 *Aug 25, 1947Aug 5, 1952Frazer Harry FDisk wheel
US2748399 *May 25, 1950Jun 5, 1956Dayton Rubber CompanyLight-weight foam rubber cushioning structure
US2864373 *Aug 4, 1955Dec 16, 1958Resista Corset CoBrassiere
US2926720 *Aug 2, 1957Mar 1, 1960Gosman Clarence BerveirMethod of and apparatus for making inflatable articles
US3048514 *Sep 17, 1958Aug 7, 1962Us Rubber CoMethods and apparatus for making inflatable cushions
US3229437 *Sep 19, 1962Jan 18, 1966Adie George MountfordConcrete structures
US3335045 *Jun 15, 1964Aug 8, 1967Post LouisMethod for making an inflatable article
US4182085 *May 17, 1978Jan 8, 1980Elson Jesse MMethod and structure for insulating a wall or ceiling
US4218274 *Apr 5, 1979Aug 19, 1980Mollura Carlos AMethod of constructing a baffled waterbed mattress
US4233102 *Nov 20, 1978Nov 11, 1980The B. F. Goodrich CompanyMethod of making an inflatable flotation device
US4262046 *Sep 6, 1979Apr 14, 1981Eitel Frederick GLightweight protective structure
US4803029 *Jan 28, 1986Feb 7, 1989Pmt CorporationProcess for manufacturing an expandable member
US4965901 *Aug 21, 1989Oct 30, 1990Gaudry NormandFuton with inflatable core
US5137592 *Feb 5, 1991Aug 11, 1992Labianco RichardFluid-filled mattress construction
US5304271 *Apr 29, 1993Apr 19, 1994Ignaty GusakovMethod of making a fluid cushion
US5419726 *Dec 17, 1993May 30, 1995Switlik Parachute Company, Inc.Inflatable flotation raft apparatus having heated seal areas and method of assembly thereof
US5502855 *Jan 19, 1995Apr 2, 1996Graebe; Robert H.Zoned cellular cushion
US5802739 *Jun 7, 1995Sep 8, 1998Nike, Inc.Complex-contoured tensile bladder and method of making same
US6190486May 27, 1998Feb 20, 2001Switlik Parchute Co., Inc.Method for making self-inflatable mattresses and cushions
US6374514Mar 16, 2000Apr 23, 2002Nike, Inc.Footwear having a bladder with support members
US6385864Mar 16, 2000May 14, 2002Nike, Inc.Footwear bladder with controlled flex tensile member
US6397417Nov 8, 2000Jun 4, 2002Stanley SwitlikSelf-inflatable apparatus
US6402879Mar 16, 2000Jun 11, 2002Nike, Inc.Method of making bladder with inverted edge seam
US6457262Mar 16, 2000Oct 1, 2002Nike, Inc.Article of footwear with a motion control device
US6494243Nov 8, 2000Dec 17, 2002Stanley SwitlikApparatus for making self-inflatable apparatus
US6564410Jan 17, 2002May 20, 2003Roho, Inc.Valve for zoned cellular cushion
US6571490Mar 16, 2000Jun 3, 2003Nike, Inc.Bladder with multi-stage regionalized cushioning
US6687936Sep 26, 2002Feb 10, 2004Roho, Inc.Valve for zoned cellular cushion
US6931764Aug 4, 2003Aug 23, 2005Nike, Inc.Footwear sole structure incorporating a cushioning component
US6971193Mar 6, 2002Dec 6, 2005Nike, Inc.Bladder with high pressure replenishment reservoir
US7000335Jul 16, 2003Feb 21, 2006Nike, Inc.Footwear with a sole structure incorporating a lobed fluid-filled chamber
US7086179Jan 28, 2004Aug 8, 2006Nike, Inc.Article of footwear having a fluid-filled bladder with a reinforcing structure
US7086180Jan 28, 2004Aug 8, 2006Nike, Inc.Article of footwear having a fluid-filled bladder with a reinforcing structure
US7100310Jan 28, 2004Sep 5, 2006Nike, Inc.Article of footwear having a fluid-filled bladder with a reinforcing structure
US7128796Jul 16, 2003Oct 31, 2006Nike, Inc.Footwear with a sole structure incorporating a lobed fluid-filled chamber
US7132032Apr 24, 2003Nov 7, 2006Nike, Inc.Bladder with multi-stage regionalized cushioning
US7141131Jan 28, 2004Nov 28, 2006Nike, Inc.Method of making article of footwear having a fluid-filled bladder with a reinforcing structure
US7156787Dec 23, 2003Jan 2, 2007Nike, Inc.Inflatable structure and method of manufacture
US7244483May 29, 2002Jul 17, 2007Nike, Inc.Bladder with inverted edge seam and method of making the bladder
US7401420May 12, 2006Jul 22, 2008Nike, Inc.Article of footwear having a fluid-filled bladder with a reinforcing structure
US7434339Nov 15, 2005Oct 14, 2008Nike, Inc.Footwear with a sole structure incorporating a lobed fluid-filled chamber
US7448522Nov 11, 2003Nov 11, 2008Nike, Inc.Fluid-filled bladder for use with strap
US7533477Oct 3, 2005May 19, 2009Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US7556846Jan 28, 2004Jul 7, 2009Nike, Inc.Fluid-filled bladder with a reinforcing structure
US7562469Oct 14, 2005Jul 21, 2009Nike, Inc.Footwear with fluid-filled bladder and a reinforcing structure
US7622014Jul 1, 2005Nov 24, 2009Reebok International Ltd.Method for manufacturing inflatable footwear or bladders for use in inflatable articles
US7707744Aug 22, 2006May 4, 2010Nike, Inc.Footwear with a sole structure incorporating a lobed fluid-filled chamber
US7707745Dec 29, 2006May 4, 2010Nike, Inc.Footwear with a sole structure incorporating a lobed fluid-filled chamber
US7774955Apr 17, 2009Aug 17, 2010Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US7810255Feb 6, 2007Oct 12, 2010Nike, Inc.Interlocking fluid-filled chambers for an article of footwear
US7810256Apr 17, 2009Oct 12, 2010Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US7950169May 10, 2007May 31, 2011Nike, Inc.Contoured fluid-filled chamber
US8302234Apr 17, 2009Nov 6, 2012Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US8302328Jun 29, 2010Nov 6, 2012Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US8312643Sep 28, 2010Nov 20, 2012Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US8540838Nov 23, 2009Sep 24, 2013Reebok International LimitedMethod for manufacturing inflatable footwear or bladders for use in inflatable articles
US8572786Oct 12, 2010Nov 5, 2013Reebok International LimitedMethod for manufacturing inflatable bladders for use in footwear and other articles of manufacture
US8656608Sep 13, 2012Feb 25, 2014Nike, Inc.Article of footwear with a sole structure having fluid-filled support elements
US8657979Apr 13, 2007Feb 25, 2014Nike, Inc.Method of manufacturing a fluid-filled bladder with a reinforcing structure
WO1999060895A1May 26, 1999Dec 2, 1999Switlik Parachute Co IncMethod and apparatus for making self-inflatable mattresses and cushions
Classifications
U.S. Classification156/227, 156/145, 156/289, 238/283, 156/292, 5/710, 156/306.9
International ClassificationB29D22/02
Cooperative ClassificationB29K2021/00, B29D22/02
European ClassificationB29D22/02