United States Patent
`Pennel et al.
`
`3,683,431
`[15]
`[451 Aug. 15, 1972
`
`[54] TIE FOR A PNEUMATIC MATTRESS
`[72] Inventors: Gerard J. Pennel, Hem; Gonzague J.
`Prouvost, Tourcoing; Robert P. Pru-
`vost, Roubaix, all of France
`-
`[73] Assignee: Etablissements Pennel &Flipo, Rou-
`balX, France
`June I, 1970
`[22] Filed:
`[.21] A l N 42 249
`pp .
`0.:
`,
`
`.
`
`[56]
`
`References Cited
`UNITED STATES PATENTS
`.
`2,298,218 10/1942 Madson ................... ..5/350 X
`3,063,067 ll 1962 M '
`..................... .‘5 3
`/
`omson
`/ 50
`Primary Examiner-Bobby R. Gay
`Assistant Examiner—-Andrew M. Calvert
`Attorney—Young 8!. Thompson
`
`[30]
`
`Foreign Application Priority Data
`
`_
`
`France .................... ..69l8488
`June 5, [970
`_
`.
`8| ............................................
`[58] Field of Search ...5/348, 349, 350; 156/172, 443
`
`ABSTRACT
`[57]
`An in?atable structure such as a mattress having ties
`interconnecting opposite walls of the structure. The
`?es comprise a thread wound around two bands in the
`form of coils of thread. The bands are secured to the
`respective two walls of the struc‘ture. A method and
`“mhme are descnbed f°r pmducmg the hes‘
`10 Claims, 14 Drawing Figures
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`INTEX EXHIBIT 2014, Pg. 2
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`3.683 431
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`INTEX EXHIBIT 2014, Pg. 3
`Bestway v. Intex; PGR2017-00003
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`

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`INTEX EXHIBIT 2014, Pg. 4
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`

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`INTEX EXHIBIT 2014, Pg. 5
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`INTEX EXHIBIT 2014, Pg. 5
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`1
`TIE FOR A PNEUMATIC MATTRESS
`
`3,683,431
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`The present invention relates to the ties which con
`trol, in in?atable structures such as pneumatic mat
`tresses, the distance between two walls of the in?ated
`structure.
`The incidence of the production cost of these ties on
`the cost of the mattress increases with the height of the
`ties. Owing to the fact that the demand in the present
`day pneumatic mattress market is particularly for high
`or thick mattresses, this factor is of particular im
`portance in such an application.
`The most usual ties, normally termed height gores,
`consist of two bands of gummed fabric adhered to each
`other on a part of their length and connected to each of
`the mattress walls which are also of gummed or rub
`berized fabric by the two'lip portions formed by the
`free ends of the bands. It is more economical to replace
`one of the bands by two hinges or L-section elements,
`one of the branches of each of which is adhered to the
`remaining band whereas the other branch constitutes a
`lip portion connected to the corresponding mattress
`wall.
`The object of the invention is to construct the ties of
`in?atable structures in a more economical manner than
`in the known arrangements mentioned hereinbefore.
`The invention provides an in?atable structure wherein
`the ties comprise one or more threads constituting
`loops or coils which surround two bands of fabric
`which are spaced apart and connected to the respective
`walls of the structure. With this arrangement, it is possi
`ble to make a considerable saving in material costs,
`since cheap and very strong threads or thread-like ele
`ments are available on the market and, moreover, the
`utilization of threads put under tension by the in?ation
`enables the strength of the thread to be employed fully
`whereas in the known ties in the form of hands a con
`siderable part of their strength is unemployed. Further,
`the quality of the adherence of present-day gums per
`mit a very reliable anchoring of the ends of the portions
`of the threads interconnecting the walls of the in?ata
`ble structure.
`In order to derive full bene?t from these advantages,
`it will be understood that the ties should be manufac
`tured continuously by an automatic method.
`A further object of the invention is to provide a
`method for continuously producing a tie comprising
`continuously unwinding bands, guiding the unwound
`bands in two spaced paths, continuously winding a
`thread or thread-like element around the assembly
`formed by the two bands, and fastening the thread at its
`points of contact with the bands.
`The invention also provides a machine for carrying
`out this method which comprises a rotary thread guide
`comprising two tubular parts one of which is central
`and concentric with the axis of rotation of the guide
`whereas the other is radially offset so as to describe a
`surface of revolution within which two reels of bands
`are disposed in such manner that they are capable of
`rotating about ?xed axes and the thread which passes
`through the central tubular part of the thread guide
`from a ?xed reel can, as it issues from said offset part of
`the thread guide, be wound round the two bands guided
`in two spaced paths.
`According to another feature of the invention, the
`continuous thread which is formed into coils is fastened
`
`2
`at its points of contact with the inner bands within the
`coils by means of two gummed bands which are
`adapted to be connected to the walls of the in?atable
`structure and are adhered to the respective inner bands
`whereby the thread is retained between two bands ad
`hered to each other at diametrically opposed points of
`the coil.
`Further features and advantages of the invention will
`be apparent from the ensuing description with
`reference to the accompanying drawings.
`In the drawings:
`FIG. 1 is a diagrammatic cross sectional view of a
`pneumatic mattress or in?atable structure according to
`the invention;
`FIG. 2 is a view in perspective of an embodiment of a
`thread tie of utility in the mattress shown in FIG. 1;
`FIG. 3 is a diagrammatic elevational view of a
`machine for continuously producing a tie of the type
`shown in FIG. 2;
`'
`~ FIG. 4 is a detail view in perspective of a carriage
`which supports reels of the inner bands and is part of
`the machine shown in FIG. 3;
`FIG. 5 is a diagrammatic detail view of means guid
`ing the inner bands and assembling the bands with two
`outer bands after the thread of the tie has been wound
`round the inner bands;
`FIG. 6 is a perspective view of a device for regulating
`the height of the tie;
`FIG. 7 is a view of the tie produced by the machine
`shown in FIG. 3;
`FIG. 8 is a diagrammatic side elevational view of a
`mattress having thread ties of varying height;
`FIG. 9 is a sectional view taken along line 9—9 of
`FIG. 8;
`FIGS. 10-12 are views of different arrangements of
`coils of ties for achieving a variable height;
`FIG. 13 is a diagrammatic view in perspective of a
`modi?cation of the machine shown in FIG. 3, and
`FIG. 14 is a diagrammatic view of another modi?ca
`tion of the machine.
`FIG. 1 illustrates diagrammatically a pneumatic or
`in?atable mattress comprising two walls 1 ,2 of gummed
`or rubberized fabric which are interconnected on their
`periphery by a connecting strip 3 and elsewhere in the
`direction parallel to the longitudinal edges of the mat
`tress by ties 4. According to the invention, the ties com
`prise one or more threads or thread-like elements f
`which extend around two bands 6,7 of gummed or rub
`berized fabric adhered to the respective walls 1,2 and
`are put under tension by the in?ation of the mattress.
`In FIG. 2, the tie thread is a continuous thread
`wound in the form of a helix around bands 6,7 of
`gummed or rubberized fabric. The portions 11a, 11b of
`the coils 11 which extend across the bands are fastened
`to the latter by complementary bands 12, 13 of gum or
`rubber which are adhered to the respective bands 6,7
`between the coils l1 and to the corresponding wall 1 or
`2. The portions 11a, 11b of the thread are thus pinched
`and retained between the bands 6,12 and 7,13 respec
`tively.
`A machine capable of continuously producing a tie
`such as that shown in FIG. 2 is shown in FIG. 3. A stand
`21 supports bearings 22 in which is journalled a hollow
`horizontal shaft 23 driven in rotation by a motor 24
`through pulleys 26, 27 and a belt 28. A thread or
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`thread-like element f supplied by a reel 29 ?xed in posi
`tion and associated with a stop device 25 for stopping
`the thread in the event of breakage and a thread guide
`30, passes through the hollow shaft 23 and enters, by
`way of a radial aperture 33, a tubular rotary thread
`guide 31. The latter is in the form of a ?ail having a
`radial portion 32 which receives the thread f issuing
`from the radial aperture 33 and is ?xed to the pulley
`27. The pulley 27 is integral with the shaft 23. The tu
`bular arm portion 32 is extended at 90° by a tubular
`portion 34 which extends in a direction parallel to the
`axis of rotation X—X. The thread f issues from the por
`tion 34 by way of the free end 35. On the part 230 of
`the shaft 23 which extends beyond the radial portion 32
`of the thread guide 31 is' suspended by means .of
`bearings 36 a carriage 37. The carriage comprises a
`vertically extending plate 38 on which are mounted two
`spindles 39, 41 carrying rotary reels 42, 43 respectively
`supplying bands of gummed or rubberized fabric 6, 7.
`Two series of guide rollers 46, 47 carried by the plate
`38 constrain the respective bands to present themselves
`beyond the end of the shaft part 23a in a position in
`which the bands are disposed in vertical alignment with
`each other and symmetrically relative to the axis X—X
`25
`of the shaft 23 so as to be guided horizontally beyond
`the last rollers 46, 47 in contact with two slide blocks
`48, 49 which are integral with the carriage 37 and
`located within the paths of the bands. The latter are
`also maintained laterally by side walls 50 ( FIG. 4).
`As shown in FIG. 4, the plate 38 is horizontally offset
`relative to the bearings 36 mounted on the plate 38 and
`on a plate 45. A counterweight 51 tends to maintain the
`plate 38 in a vertical position. The con?guration of the
`plate 38 and its position relative to the shaft 23 are such
`that the plate 38 and the reels 42, 43 are within a sur
`face of revolution S described by the thread guide 31 so
`that the thread f issuing at 35 from the guide 31 in a
`plane P, constituting one of the bases of the surface S,
`can be wound in the form of a ?attened helix around
`the bands 6,7 supported by the horizontal blocks 48, 49
`in contact with which they slide.
`Mounted on an upright 55 integral with the stand are
`two reels 56, 57 which are symmetrically disposed rela
`tive to the axis X—X and supply the two bands l2, 13
`of gum or rubber. The latter pass round guide rollers
`59, 61 and are thereafter applied against the bands 6,7
`between the pinching portions of two pairs of rollers
`62, 63 (FIG. 5) so that the thread f wound round the
`inner bands 6, 7 in the form of coils 11 is trapped
`between the bands 6, 12 and 7, 13. The rollers 63 are
`carried by ends of two arms 65 which are pivoted to the
`stand at their other end 65a and interconnected by a
`spring 70 which biases the rollers 63 toward the cor
`responding rollers 62. As they issue from between the
`applying rollers 62, 63 the pairs of bands assembled
`with the thread f converge toward the bite or pinching
`portions of two rollers 64, 66 of a small pressure-apply
`ing and driving press device 67. The rollers 64, 66 are
`driven by a motor 68 and pull on the bands 6, 7 and 12,
`13 and unwind the bands from the corresponding reels
`42, 43 and 56, 57 and crush the assembly consisting of
`the two pairs of bands 6-12, 7-13 and the coils of
`thread 11 interconnecting them.
`It is advantageous to arrange that the outer face of
`the gum bands l2, 13 be covered with a protective ?lm
`
`4
`73 or 74 (FIG. 7) of plastics material, such as
`polyethylene, which moreover performs the function of
`a reinforcement for the gum and increases the tensile
`strength of the bands as they pass through the machine
`and renders the bands more stable. This characteristic
`is bene?cial also in the course of cutting the band 12,
`13 from the sheets of gum or rubber due to the fact that
`the latter are covered with a sheet of plastics material
`from which the bands 73, 74 are cut. The ?nal ?at and
`?exible product 78 issuing from the machine shown in
`FIG. 3 has the appearance shown in FIG. 7 where small
`'loops 110 resulting from the crushing of the coils 11,
`are formed beyond the two edges of the bands. After
`removal of the two protective bands 73, 74 and cutting
`to the required length, the assembly 78 constitutes a tie
`ready for immediate use.
`FIG. 6 shows a device 80 which can be ?xed to the
`plate 38 and to the plate 45 of the carriage 37 for vary
`ing the height of the tie. This device comprises mainly a
`transverse spindle 81 joumalled in the plate 38 and in
`the plate 45, the portions 81a, 81b of the spindle ex
`tending laterally beyond the plate 38 and plate 45 and
`being screwthreaded in opposite directions and
`screwed into nuts 82, 83 constituted by bars which are
`maintained horizontally by transverse guide rods 84
`?xed to the carriage 37 and slidably engaged in the end
`86 of the bars 82, 83 opposed to the region in which the
`thread f is wound. Fixed to the other end 87 of the bars
`82, 83, is a longitudinal rod 88 which extends beyond
`the plane P in which the thread f is located as it issues
`from the end 35 of the rotary thread guide 31 before it
`is wound around the inner bands 6,7, so that the thread
`is wound around the free ends of the rods 88 and the
`upper and lower edges 50a, 50b of each side wall 50 in
`the region of which the bands 6, 7 are guided. The coils
`11 are therefore formed along the line N A B M C D N,
`whose approximate con?guration is that of a diamond,
`and their length, which controls the height of the tie, is
`a function of the horizontal distance NM between the
`two longitudinal rods 88.
`This distance can be modi?ed by screwing or_ un
`screwing the nuts 82, 83 achieved by causing the rota
`tion in one or the other direction of a motor-speed
`reducer unit 90 whose output shaft rotates the spindle
`through gears 91, 92.
`Owing to the fact that the motor unit 90 of the device
`80 for regulating the height of the ties is integral with
`the carriage 37 located wholly within the surface of
`revolution S described by the thread guide 31, the unit
`90 is supplied with power in accordance with an ar
`rangement, not shown, from contacts sliding on con
`ductive rings integral with the shaft 23. A similar ar
`rangement is also adopted for the connections normally
`provided for controlling the stoppage of the machine
`when the reels 42, 43 supplying the inner bands 6, 7 are
`empty.
`Various additional devices (not shown) are normally
`incorporated in the machine for reasons of safety or to
`widen its possibilities of utilization.
`In order to ensure that the thread f does not block
`the rods 88 which regulate the height of the tie, when
`the ?nished product 78 is not drawn from the machine
`by the press 67, safety means are provided for stopping
`the motor 90 when the motor 68 of the press 67 has
`stopped.
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`To facilitate the utilization of the device 80 for regu
`lating the length of the coils, in particular for changing
`the height of the tie as a function of the characteristics
`of the mattress to be produced, there can be provided a
`control potentiometer affording a reference voltage to
`which is compared the voltage of a controlled poten
`tiometer driven by the nuts 82, 83 of the regulating
`rods 88. Any deviation ascertained results in the start
`ing up of the motor 90 in the required direction. End
`of-travel stops are of course provided to limit the travel
`of the nuts 82, 83.
`To vary the height of the tie along to its length, it
`possible to program the device 80 by replacing the con
`trol potentiometer by an outlet stage of an ampli?er
`controlled by a timing device or by the reading of a per
`forated card or by the use of a follower in contact with
`a full-size pattern or model of the pro?le of the mat
`tress to be produced.
`The fact that it is possible to modify the height of the
`ties by modifying the length of the coils enables the
`mattress to be shaped at will and in particular enables a
`mattress (FIG. 8) whose end portions are raised to
`form a pillow a and a foot rest b to be made. If the mat
`tress comprises tubular or sausage-shaped portions, the
`edge tubular portions are advantageously bigger so as
`to stabilize and retain the user of the mattress.
`Between the end portions a and b the tie can have a
`constant or, better, a varying height so that the mattress
`has a quilted appearance.
`The quilted appearance can be achieved in different
`ways:
`a. By interrupting the threads or thread-like elements
`in some regions so that the mattress assumes a pro?le
`of equilibrium between the regions complete with ties
`(FIG. 10).
`b. By continuously varying the height of the tie (FIG.
`1 l ).
`c. By varying the height in a discontinuous manner
`(FIG. 12); in this case the threads of the long coils 111
`are not under tension and serve no purpose, which
`gives the same result as the ?rst arrangement.
`Note that the ties of the mattress do not all have the
`same pro?le, the elements producing the quilted ap
`pearance having a staggered disposition or if it is
`desired to give a concave shape to the pillow (FIG. 9).
`The hourly rate of production of the machine shown
`in FIGS. 3-6 is limited by the speed of rotation of the
`thread guide 31 which cannot exceed 250 rpm. To in»
`crease the production rate it is necessary to provide
`multiple windings round the bands 6, 7 of the tie by em
`ploying a machine having a plurality of thread guides,
`such as the machine shown in FIGS. 13 or 14.
`The machine shown in FIG. 13 comprises two thread
`guides 31a, 31b which are ?xed in diametrically op
`posed relation on the shaft 23 and so arranged that the
`outlet 35a, 35b of the respective guides supply two
`separate threads fa, fb issuing from two ?xed reels 29a,
`29b. The reel 29a is, in the same way as the reel 29
`shown in FIG. 3, outside the rotating part and the reel
`29b is mounted on the carriage 38 which carries the
`band reels 42, 43. Two windings 11a, 11b are thus ob
`tained.
`The machine shown in FIG. 14 comprises thread
`guides 31a, 31b, 31c carried by the shaft 23 which
`supply three threads or thread-like elements fa, fb, fc
`
`6
`coming from three reels 129a, 129b, ‘1290 which are
`' driven in rotation with the shaft 23. In this case, the
`threads travel inside not only the shaft 23 and the
`thread guides but also inside three support arms 101a,
`101b, 1010 which carry the respective reels and are
`situated in the plane of the corresponding thread guide.
`Three windings 11a, 11b, 11c are thus obtained.
`The machines described hereinbefore have been
`given solely by way of example and it is possible to em
`ploy different machines. Thus the thread reel or reels
`can be mounted on a ring which is driven in rotation
`and through which the two bands 6, 7 travel, the ring
`being provided with a plurality of thread guides which
`correctly wind the thread or threads. The thread guide
`or guides of the driven ring could, by way of modi?ca
`tion, be supplied from one or several hollow rotary
`reels which are concentric with the ring and through
`which the two bands 6, 7 also travel.
`‘ As concerns the ?lament, thread or thread-like ele
`ment f, note that it should be relatively elastic, possess
`zero total torsion and a good stiffness. Moreover, it‘ a
`should not fray. Good results have been obtained with a
`840 denier Nylon thread coated with a plastics resin.
`The walls of the pneumatic mattress, or other in?ata
`ble structure, instead of being of gummed or rub
`berized textile fabric could be of a coated non-woven
`fabric or of plastics material.
`Having now described our invention'what we claim
`and desire to secure by Letters Patent is:
`1. An in?atable structure, such as a pneumatic mat
`tress, comprising two air~tight walls in spaced relation
`to each other and tie means interconnecting said walls,
`said tie means comprising a thread-like element ex
`tending in a coiled con?guration around an axis and in
`cluding a plurality of coil portions which'extend around
`said axis and are in spaced relation longitudinally of
`said axis, two bands which are spaced apart from each
`other and respectively in applied relation to said walls,
`said coil portions of the thread-like element encom
`passing both of said bands, and each coil portion having
`two regions respectively in contact with said two bands
`on opposite sides of said axis, and means for ?xing said
`two bands to said walls and means for precluding
`slipping of said two regions of each coil portion relative
`to said two bands.
`2. An in?atable structure, such as a pneumatic mat
`tress, comprising two air-tight walls in spaced relation
`to each other and at least one tie means interconnect
`ing said walls, said tie means comprising at least one
`continuous thread-like element extending in a coiled
`con?guration around an axis and including a plurality
`of coil portions which extend around said axis and are
`in spaced relation longitudinally of said axis, two inner
`bands of material which extend axially through said coil
`portions and are in spaced relation to each other, two
`outer bands respectively connected to said two walls
`and respectively connected to said two inner bands,
`each of said coil portions of said thread-like element
`having two regions respectively secured against
`slipping between one of said outer bands and one of
`said inner bands and between the other of said outer
`bands and the other of said inner bands on opposite
`sides of said axis.
`3. The in?atable structure of claim 2, wherein said
`outer bands are of gum.
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`4. The in?atable structure of claim 2, wherein said
`outer bands are of gummed or rubberized material.
`5. The in?atable structure of claim 2, wherein said
`outer bands are adhered to said two walls.
`6. A tie means for interconnecting two spaced walls
`of an in?atable structure, such as a pneumatic mattress,
`comprising two inner bands and two outer bands
`respectively applied against the inner bands, at least
`one continuous thread~like element interposed
`between each inner band and the corresponding outer
`band, said thread-like element extending in a coiled
`con?guration and including ?attened coils forming
`loops on each side of the inner and outer bands, each
`inner band being connected to the corresponding outer
`band and securing in position said thread-like element
`interposed between the inner band and corresponding
`outer band.
`7. The tie means of claim 6, wherein each outer band
`has an outer face covered with a detachable protective
`layer of plastics material.
`8. An in?atable structure, such as a pneumatic mat
`tress, comprising two air-tight walls in spaced relation
`to each other and tie means interconnecting said walls,
`said tie means comprising a plurality of thread-like ele
`ments extending in a coiled con?guration around an
`axis, each thread-like element including a plurality of
`coil portions which extend around said axis and are in
`spaced relation longitudinally of said axis, two bands
`
`8
`which are spaced apart from each other and respective
`ly connected to said two walls, said coil portions of the
`thread-like elements encompassing both of said bands,
`and each coil portion having two regions respectively in
`contact with said two bands on opposite sides of said
`axis, and means for ?xing said two bands to said walls
`and means for precluding slipping of said two regions of
`each coil portion relative to said two bands, the coil
`con?gurations of the thread-like elements having an
`offset relation longitudinally of said axis.
`9. A tie means for interconnecting two spaced walls
`of an in?atable structure, such as a pneumatic mattress,
`comprising a thread-like element extending in a coiled
`con?guration around an axis and including a plurality
`of coil portions which extend around said axis and are
`in spaced relation longitudinally of said axis, two bands
`which are spaced apart from each other, said coil por
`tions of the thread-like element encompassing both of
`said bands, and each coil portion having two regions
`respectively in contact with said two bands on opposite
`sides of said axis, and means for ?xing said two regions
`of each coil portion to said two bands.
`10, The tie means of claim 9, wherein said coils vary
`in size in di?‘erent parts of said bands whereby when
`said thread-like element is put under tension by urging
`said two bands away from each other, the distance
`between said bands varies in said different parts.
`* * *
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