DE1939050A1 - Inflatable tubular curved body and process for its manufacture - Google Patents

Description

bbsghreibuug

sur patent application of

Company P I R E L Ii I Societd per Asioni, Milan / !! DALIEIT,

concerning

"Inflatable double-sided curved body and process 3U its production "

PRIORITY: 3c August 1968 -

The invention relates to inflatable tubular bodies from flexible, water- and air-impermeable, elastic material with an achae, which is at least partially, optionally three-dimensional, curved and reinforcing elements having. "■■■ '-

Up to now the manufacture of inflatable, tubular, curved ones Body in this respect difficult, ala with regard to the defined curvature, a series of connected lengths of tubing used and some number of Mhts in levels had to be formed perpendicular to the tube axis. This required a lot of time and a considerable loss of material

- 2 -

90 98 86/0 398

cncG'i

by scrap, making the accounts of tubular fabrics an essential Experienced an increase.

In addition, as a result of the seams on the curved part of the tubular bodies, a discontinuous surface was created after their inflation, which was generally not appreciated from the aesthetic point of view. Such a discontinuous surface may mean together with the seams also a technical disadvantage, especially if the manufactured in such a manner inflatable body as a floating element, s _o as to an inflatable boat, used vmrde ".

In fact, lsi bug just presented one in the described Wise made Schlar flbootes, which, around a curved Design to get & aa more molar interconnected Hose lengths was formed, the existence of the lines and the discontinuous surface caused by this an obstacle to the forward movement of the boat in the water In addition, the seams formed critical areas with regard to the mechanical strength of the structure.,

The object of the invention is to eliminate these disadvantages and to create a simple method of manufacture such tubular body.

The object is primarily achieved in that according to the invention a rope of the reinforcing elements is arranged throughout the tubular body so that the latter has an inextensibility in the circumferential direction, which is essential is greater than that in the axial direction, and that further reinforcement elements for the inaccessibility in in the axial direction at least in / on the inside of the curved part ^ of the body "

909886/039 8

8AD ORIGINAL

193905 Q

It can be advantageous to have additional reinforcement elements to be provided in other places as well. Particularly useful 1st the arrangement of reinforcement elements on the outside dee curved file of the body; in order to give this rope an inextensibility, at least in the axial sighting.

The method according to the invention includes the following measures, among others:

the manufacture of a tubular body similar to the one above specified material, which has reinforcing elements along its full development, by means of which it is given an indelibility in the circumferential direction, which is substantially greater than its extensibility in the axial direction let;

- on the body only on part of the latter in the additional reinforcement elements applied in the axial direction which prevent axial stretching of the body;

- the ends of the body are closed;

- the body is puffed up in order to obtain such a curvature that the inside of the latter is in the area of the latter further restrictions;

on the bitten body % έ smts
monte are applied, which the
elements similarelii üttil äüi fetepes? in ier ven iM For «leetl ^ iiÄ ü« - ^ -

the body

if the ah aeinin liiiii

will.

8AO ORIGINAL

193905Q

Among those used in the description and claims Designation "Yerotärkungselemente" are above all one or several threads, yarns, cords and the like to be understood, which are made of natural or artificial or synthetic textiles Material or made of metal and in a layer next to each other and parallel or substantially parallel are arranged or have any other suitable position according to the requirements of the invention. the The designation also includes natural, artificial and synthetic elementary textile fibers or fiber bundles, those in one direction or predominantly in one direction are oriented. All of these materials are included in the base material used to form the tubular body embedded.

As far as the mentioned "further" and "additional ¹¹ reinforcing elements are concerned, this term also includes a single strip of flexible material which is suitable for the stated purpose and which is predominantly inextensible in the longitudinal direction. As examples, the thermoplastic resins such as polyamides, vinyl resins and may be mentioned other.

The terms "inextensible ¹¹ " and "inextensibility" are used in the description and in the claims for the sake of simplicity, whereby it must be taken into account "that they can also mean" almost extensible "to""very slight elasticity" *

The expression "in Uiafangsriektyng" means that direction which is taken along the flange of a hose cut in a plane perpendicular to the Schlauehaxis lies.

For a better understanding of the invention will serve

/Olli

SAD ORiGiNAL

• 193905Q

_ ς -

for example and in connection with the drawings? described; show it:

Figure 1 is a perspective view of part of an inflatable tubular body according to the invention when emptied or drained,

Pig. FIG. 2 is a perspective view of that shown in Pig tubular body, which however is curved by inflation,

Pig. 3 is a sectional view of the tubular body shown in Pig, 2;

Fig. 4 is a plan view of an inflated toroidal body according to the invention of annular shape 5

FIG. 5 is a view in section along the line Y-V of FIG Fig. 4 Aehlaueh-shaped body shown,

6 is a plan view of an inflated tubular body of a misshapen shape according to the invention j,

7 shows a view of the tubular body shown in Pig 6 in section along the line VII-VII _s

Figure 8 is an _o Drattfsieht a erfinöungsgemäß inflated schlauehförmigen body, partially arc-shaped,

Pig »9 is a perspective view of an inflated Clever-shaped body, partly three-dimensional curved,

909886/0398

BATH ORIGINAL

Fig. 10 is a plan view of two inflated tubular tubes Bodies that are united to form a structure and

Pig. 11 is a front view of this structure.

Pig. 1 aeigt a length of a tubular body or tubular body 1 in the deflated state. The hose is made of a flexible and impermeable elastic material 2 in which reinforcement elements are embedded. Some of the reinforcing elements _s, namely those labeled 3, are arranged in such a way that they give the hose in the circumferential direction essentially an extensibility which is greater than the few ^{in the} direction of the axis I _9, while other reinforcing elements 6 are arranged in an area 5 which corresponds to the inside of the curved part in order to make this area essentially inextensible in the axial direction.

The tube body with a certain inflation compartment, through which the stretchable zones are elongated Curvature caused by the materials used to form the hose ^ nd by the arrangement of the Reinforcement elements 3 and 6 can be obtained.

As can be seen best from Fig. 2, which shows the same tube length, but in the inflated state and therefore curved, the reinforcing elements 3 can form ropes of a rubberized cord fabric, especially since the inflatable tube body is covered with elastic rubber 2 on both sides (rubberized) corti tissue is made.

The cords 3, which are in the hose body over its full © Embedded length can be parallel to each other and

909886/0398

* * ■ · t t t

r «r

193905Q

lie in planes perpendicular to axis 4, as shown. If necessary, the outer threads can be comparatively small Form angle bit to axis 4 perpendicular planes.

Me reinforcement elements for the zone 5 are formed by cords 6, which are parallel to each other and substantially are aligned in the direction of the axis 4. Furthermore, the cord threads can form parts of a rubberized cord fabric. Of the The strip containing these elements is firmly attached to the hose body, preferably with the help of adhesives, if the tube body has been manufactured using a ready-made vulcanized rubberized Oordgewebes ·

An example of an inflated tubular body which is curved and ready for use and in which the reinforcement elements are arranged in such a way that the basic shape described above is obtained is the annular body shown in FIGS. The shape can be used, for example, to form an inflatable swimming pool ^{11. For} example, in this case it can be useful to provide additional reinforcing elements on the outside of the curved part in order to give this part an expandability at least in the axial direction.

Fig 6 shows a U-shaped inflated tube body, which consists of a more or less curved central part 7 and two rectilinear lateral parts θ consists "which the latter are substantially parallel to each other" A reinforcement tire <j is inaudible in the axial direction and applied over the full length of the body, which includes the inner part of the curved section 7 and the inner parts of the straight sections β forms. Hit ίο is an additional reinforcement in the form of a strip that comes out

ORIGINAL

193905Q

rubberized cord fabric with lengthways parallel cords is made; this strip is fixed both on the outer side of the curved section 7 as well as on the outer rope of each of the parallel sections - diametrically opposite the strip 9 - attached, as can be seen from Figure 7

The tubular body thus formed can be used to form the inflatable floating body of an inflatable boat of the type equipped with a stern board, for example.

Fig. Β shows an inflated tube body _t which is formed by a substantially straight part 11 and by a curved part 12, from where the cross section decreases towards the end. Furthermore, this hose body is provided with a reinforcing strip 14 on the outside of the curved rope 8. The inner strip is denoted by 13.

If the ends of two of these curved bodies are joined symmetrically with respect to the plane of the joint, it is possible to use an inflatable unit as shown in Figs which can be used as the float of a dinghy, e.g. of the stern lip type,.

When the two inflatable bodies are connected along a plane of symmetry so that the calibrated tapering ends of the curved ropes converge upwards, a Inflatable boat can be obtained, the bow of which is curved upwards.

Fig. 9 shows a hose body, the axis of which is curved three-dimensionally, so that the longitudinal reinforcement 15 is not

9 0 9886/0398

BATH ORIGINAL

193905Q

is parallel to the axis of the original hose

For example, rubberized cord fabric was specified as the material forming the curved inflatable tube body » Instead of the rubberized cord fabric, however, whole or in some cases other materials suitable for the intended purpose are also used »

Instead of elastic rubber can be used for the hose body SoBo a thermoplastic resin with sufficient elasticity « did be used «>

Bas method of making an inflatable curved The tubular body was preceded by its ordinary Phase sequence described. 33aa method further includes Applying additional reinforcement elements at least the outside of the preserved curved

Further phases can be added to the process, especially with regard to ^ the special features incorporated into the hose body should be awarded "

an annular body is to be obtained As a last step in the procedure, the ends are connected so that the toroidal iliac is also obtained after inflation.

If no reinforcements Eind provided on the outside dos ge3irümaten rope _r takes the union of the ends of the tube body zn a Hing aweckmäßig prior to inflation.

Especially in the case in which a curved hose

909886/0398

body is to be produced, which because of its shape in the inflated state unlike a toroidal body is unable to hurry in full equilibrium to hold, as in the case of the body shown in Fig. 6 the pail is, it is expedient, in special catfish when applying the Veretärkiragsstreifens on the outside of the curved * part. For this purpose the strip 10 becomes diametrically opposite to the strip 9 applied in two stages, for example; first the two rectilinear sections 8 corresponding lengths attached and then, after inflation, the other lengths corresponding to the curved section 7 appropriate, of course there is a possibility be examined, a> continuous or the « continuous strip to 3 by the union of Partial strip is obtained to apply.

The inflation of the tube body, through which it is to be informed of the defined curvature, can be carried out while the body is in a pomnmgsrahraen in order to be able to control the course of the curvature. The use of the Fonnungarahiiens or "a" template "is particularly advantageous \ mnn one wishes to give the tubular body a curvature su, which differs in some areas relative to other zones _s before it receives its final Porm by additional Verstärkungseleffiente that the curved to the outside Rope to be applied «,

If desired, the additional reinforcement elements can be applied the outside of the curved part can be dispensed with.

909886/0 3 98

© AD ORtGlNAt,

Vie mentions »Ssaraa this happens with hose bodies that are im inflated confessed to assume a curved shape »the calibrated in equilibrium, as is the case with an inflated ring body.

In the case of the curved body obtained in the manner according to the invention, there are no lines approximately in relation to the hose axis vertical planes provided. In addition, the longitudinal seams for the production of the initial loop can be reduced to a single one or, if the reinforcement elements, which are inextensible in the circumferential direction, are helical Have arrangement »the seams mentioned can be left out completely ·

Because of the advantageous lack of seams on the curved parts, the hose bodies obtained in the manner according to the invention can also be used on the curved ropes have a continuous surface, which is particularly appreciated from an aesthetic point of view.

In addition, the lack of seams and the continuous surface on the curved parts of the inflatable tubular body or composite body according to According to the invention, these bodies have advantageous seaworthy properties when they are used in inflatable boats, as well as increased mechanical strength (due to the lack of an interrupted continuity) under construction.

PATENT CLAIMS:

909886/0398

BATH ORIGINAL

Claims (1)

193905.Q PAEBBTANSPRttCHB ι 1 * Inflatable tube shaped body »if applicable with variable cross-section, made of a flexible * and water and air impermeable elastic material nit an axis »which is at least partially, possibly three-dimensional, is curved and has reinforcement elements, characterized in that a part (3) of the reinforcement elements so arranged on the whole tubular body (1) The net is that the latter has an inextensibility in the circumferential direction has, which is substantially larger than that in the axial direction, and that further reinforcing elements (6) for the inextensibility arranged in the axial direction at least in / on the inside of the curved part of the body are. 2. Body according to claim 1, characterized in that the body is made of rubberized cord fabric (2). 3 body according to claim 1 or 2, characterized in that that the body along its full unwinding cords (3) which are parallel to each other and lie in planes which are perpendicular to its axis (4) or form comparatively small angles with respect to planes perpendicular to this axis (4). 4. Body according to at least one of the preceding claims, characterized in that the reinforcing elements arranged on the inside of its curved part (6 »9, 13) are formed by cords which are parallel to one another and essentially in the direction of its axis are oriented " 909886/0398 193905Q 5 »Body according to at least one of the preceding claims, characterized in that additional reinforcing elements (10, 14) on the outside of the curved rope are provided to the latter an inextensibility at least to lend in the axial direction. β »body according to at least one of the preceding claims, characterized in that this has a toroidal Porm 7. Body according to at least one of claims 1 to 5, characterized in that it has a curved shape and the radius is variable in different ropes. S ₀ body according to claim 5 or 7 s characterized in that it is characterized by at least one curved section (7) and at least two straight lateral sections (8) is formed. 9. Body according to claim 5 or 7, characterized by an essentially straight rope (11) to which at least one curved rope (1.2) is connected. 10 _ö body according to at least one of the preceding claims, characterized in that in the inflated state its Achas does not lie in one plane, but extends spatially (Pig. 9). 11 »Structures characterized by at least two bodies according to at least one of the preceding claims. 12 _O structure according to claim 11, characterized in that the body forms a single inflatable unit » 909886/0398 BATH ORIGINAL 13. Structure according to claim 11 or 12, characterized in that the bodies at their curved ends with one another are connected. 14. Process for making inflatable tubular Body made of flexible, water and air impermeable, elastic material, the axis of which at least partially, optionally three-dimensional, is curved, and the reinforcing elements have, according to one of claims 1 to 10, since « characterized by that - a sehlauehfönniger body is produced, which is longitudinally its full development has reinforcing elements, which give it a U-similarity in the circumferential direction is awarded, which is much greater than its stretchability is in axial direction; - on the body, only on one rope of the latter in the additional reinforcement elements are applied in the axial direction, which prevent axial leaching of the body; - the ends of the body are closed j -the body is inflated to obtain such a curvature that the inside of the latter is in range of further reinforcements lies; - Reinforcing elements are additionally applied to the inflated body, which correspond to the wide reinforcing elements resemble and define the body in the form it has achieved and finally - the hose body empties baw. is drained and gegebeuenfails the stoppers inserted at its ends be removed * 809886/0398 BATH ORIGINAL 193905Q 15 · The method of claim 14 'characterized in that the ends üee body are combined with each other. 16. The method according to claim 14 »characterized in that that the application of such further reinforcement elements takes place over the full length of the body, and that the application of such additional reinforcing elements, the be formed by at least one strip, which is inextensible in the axial direction, in one for the other Elements diametrically opposite position takes place that only one XeIl of this is applied, and that then the Remaining rope is applied to the part of the body which in the meantime will be bent by the inflation. 17 · The method according to any one of claims 14 to 16, characterized in that the inflation with the help of a Shaping frame is carried out and that the reinforcements, through which the tube body can be set in its final shape, be applied during the Body is arranged in the molding frame and is in the inflated state. 18, the method according to any one of claims 14 to 17, for Production of a tubular body according to claim 6, characterized in that - A hose body is produced, which over its full Development has reinforcing elements through which it is given an extensibility in the circumferential direction which is much larger than the extensibility in the axial direction; - Reinforcement elements in a straight line on the hose body 809886/0398 8ADORfGfNAL applied which are inextensible in the axial direction ' are; - The ends of the hose body are connected to a Get ring. * PAnNTANWXLTE OR.-IMC.H. PINClOt DIPt.-ING. H. "EAR WPL-ING. 809886/0398 Blank page