DE1607870A1 - Process for the production of helically wound containers and equipment for carrying out the process - Google Patents

Description

Process for the production of helically wound containers ₄ i ^ | dSeratzurDurehfütorung _{- the} process

"The Invention" refers to helically wound Container as well as a method and a serät for the production such container. .

Helically wound containers have been around for many Moan, and it became ;: to. Create this container a . "Variety of processes and devices developed as they · for example in U.S. Patents 2,623,443 and 2,623,445. .

Containers wound in the shape of a screw and, in particular, in the shape of a screw wrapped cans or cans have a number of gate parts, the main one being the one that the cost of such cans is lower than the cost here Metal cans are. As a result, sohrau'-benföriaig became wrapped do sea or cans for packing a wide variety of products developed * so far received * - Screw-shaped cans, however, are very common I testify to the dissatisfied part of those below Drtick must be kept such. B # Mal ^ ge «

drink ", such as beer and " ale "* cans or booeii in this floodplain

. ■■■■. * - ■ BAD ORSGiNAL

Leadership must be able to divert an interior Gas pressure, which is typically about 5.9 to 6.6 kg / cm (85 "to 95 P * s, i) can be to prevent during pasteurization, and they must also withstand severe external treatment such as immersion in ice water over extended periods of time. Albeit such cans or cans for packaging products such as refrigerated Pastry products that have been used successfully have turned out to be not entirely satisfactory for this purpose.

There is therefore a need for a new and improved, helical one wrapped can or can is available, especially for such a can that is used for packaging products such as about beer and "ale" can be used without a substantial amount Drop · in gas pressure occurs over long periods of time «■

There is also a need for a can that will withstand external, grossly improper treatment to which the above types of doses are commonly exposed.

There is also a need for cans, all related can be used with conventional fill and seal equipment, appropriately modified, which is also seamless so that the can body is around its full circumference can be decorated, and the further insulated bind, that they do not warm up so quickly at room temperature like metal cans.

BATH ORIGINAL

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There is also a need for a helically wound can or liner in which the paper walls have a lower moisture content than is common for such cans, e.g. B .; '0o compared to $ 8, and which furthermore has a higher compressive strength in the axial and radial direction than is usual with conventional helically wound cans' of comparable weight. There is further a need for a helically wound can which is particularly suitable for packaging products which must be held under moderate pressures, such as with little. Carbonated non-alcoholic beverages, dissolvable coffee, chilled dough products and food packaged under pressure in small packages, such as biscuits, etc.

There is also a need for a new and improved method for making helically wound cans or cans and for a new and improved device for making them helically wound cans and cans, available.

In this regard, there is also a need for a new one and improved helically wound can and method and an apparatus for making helically wound cans used in an assembly line operation with can filling devices are suitable.

In accordance with the present invention, a can is used for packaging Liquid products created under quite a bit of pressure must be held, and which is made up of a series of concentric helically wound layers

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a layered wall construction consisting of one inner barrier or protective layer, which as a layered body made of a self-supporting, fairly pore-free, thin a continuous layer of slippery and sanitary coating is formed on the inner surface of this sheet, a body ply that has a paper can main layer, wherein at least one inner surface of the film of the barrier layer comprises a continuous coating of a heat sealable, thermoplastic material, which the barrier and Body layers heat-sealed to one another and a lettering layer, which as a layered body from an inner hot-

sealable thermoplastic layer that covers its entire Surface is heat-sealed to the outer surface of the body ply, a paper layer over the inner layer, a middle thermoplastic layer which is applied as a coating to the outer surface of the paper layer and one thin metal foil layer is formed on the outer surface the middle thermoplastic layer is glued.

According to the invention, a method for producing helically wound can bodies is also specified, in which the the first layer is wound on a mandrel and the following Layers are wound over it, in particular a strip of the barrier or protective layer wound onto the mandrel to form a first continuous tube with the slippery and sanitary coating contacting and engaging the mandrel front edge section of a -each turn a rear pthe rear edge section of the previous turn overlaps »

* gas pressure tight film and a thin BAD ORIGINAL

00983S / 0027

the thermoplastic layer of the rear edge portion of the barrier ply strip is heated to a heat seal temperature after the strip contacts the fountain but before it comes into contact with the front edge portion of the subsequent turn, a strip of the body ply is wound onto the mandrel and over the barrier tube is used to form a second continuous tube with the thermoplastic coating of the body ply positioned so that the barrier ply contacts the side edges of the body ply before being wound onto the mandrel to create beveled paper surfaces at each edge of the body ply; the wrapping of the body ply is such that the thermoplastic "^ coating on the front edge portion of the body ply overlaps the beveled paper surface on the rear edge portion of the previous turn of the body ply, further the entire width of the thermoplastic layer of the body ply to a heat sealing temperature is heated just before it contacts the underlying tube on the mandrel, thus heat-sealing pretty much the entire width of the body ply to the barrier ply, and further heat-sealing the front sand portion of the thermoplastic coating of the body ply to the underlying beveled paper surface, further a strip of the lettering ply is wound on the mandrel to a third continuous Rohrr as outermost layer of the Uosenkörpers form, wherein _the? Besahriftungalage wiyd old arranged their intisreft heißversiegel'baren layer against the Eosm Mn wnä, sslealich, the entire * "Smitt Oer inner thtj isoplastiee! i * n Sahloht the inscription lag «is heated to« ine hot sieveXtespeatur, unaltteltoair ρ

08IIIB / 002?

h & UX ί. . , ^ Ut X ^ wi * i ** i , * »« - * wi. mMTOH f. «- - * <** -. ■ r '

- before this with the Hohr immediately below the thorn comes into contact, whereby the coating layer with the pipe immediately below it across zjanlich . the entire width of the inscription layer is heat-sealed »

In accordance with the present invention there is also an apparatus provided for carrying out the method according to the invention, consisting of a pipe winding mandrel, a device for winding a strip of the barrier or protective layer on the. Mandrel to form a first continuous tube with the slippery and sanitary coating contacting and inserting the mandrel front edge portion of each turn a rear Edge portion of the previous turn overlaps, a first Flame burner device which is arranged so that a Flame on the thermoplastic layer of the rear edge section of the barrier ply strip is directed to heat the same to a heat sealing temperature after the strip contacts the mandrel but before it contacts the leading edge portion of the subsequent turn, a device for winding one; Strip the body sheet onto the mandrel and over the protective sheet tube to form a second continuous tube. wherein the thermoplastic coating of the body ply is arranged to contact the protective ply, a device for capturing the side edges of the body position in front of them Winding on the mandrel to make beveled paper surfaces on each Edge of the body position to see, the body position if they

- Aufty «vioteel! BiA8 & t so angeoa? D» et sMrt? » that the thermoplastic

* Coating on the front edge of the body, the beveled

ie |> iej? f3, ioii © ^; -β »rttoJcwärtsiga» iaaiafesolimitt tea? previous ■ ;: eO983S / ÖO2?

Wrap of the body position overlaps, a second flame burner device for heating the entire width of the thermoplastic Layer the body ply to a heat sealing temperature immediately before it comes into contact with the underlying one Tube comes on the mandrel, making pretty much the entire width ·. the body ply is heat sealed to the barrier ply and further the front edge cut of the thermoplastic cover of the body ply with the beveled paper surface underneath is heat sealed, further comprising the second flame burner device has a plurality of individual burners, each of which in the transverse direction to the .Kkörperlage strip next to the point of contact with the underlying tube is arranged on the mandrel, a device for winding a strip of the inscription layer on the mandrel to get a third continuous tube as the outermost layer of the can body train, the inscription layer with its inneisi. heat sealable Layer * arranged against the mandrel and a front edge section of the inscription layer is arranged in such a way that that it has a rear edge portion of the preceding Wrap of the inscription layer overlaps, and a third flame burner device for heating the entire width the inner thermoplastic layer of the inscription layer to a heat seal temperature just before they come into contact comes with the pipe immediately below on the mandrel, whereby the inscription layer with the immediately below running pipe across pretty much the entire width of the inscription line is heat-sealed, and the heating of the inner thermoplastic layer of the inscription layer also serves to the overlapping edge section of the lining layer to be hot

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to seal.

According to the invention, a metal end closure is also used Use with a multi-layer, helically wound can provided according to the invention, consisting of a central one circular wall section, a drawn annular wall section extending axially inward from the wall section extends, an annular shoulder portion that with ■ the drawn .Wallabschnitt is connected along an arch, and extends axially and radially outward with the shoulder disposed at a relatively small angle to the vertical and the shoulder portion serves to receive an open end of the can body and further the shoulder portion has a maximum diameter which is greater than the inner diameter of the can body so that the can body must be stretched quite a bit when, during can assembly, the end of the can body is pushed over the shoulder, an annular one Edge portion and an annular flat portion connected to the edge and shoulder portions and with this forms the can end closure, the width of the flat / the height of the rim being relatively large, around one take up substantial amount of can body material in the end seam, whereby the end seam will withstand internal pressures in the can, as well as the height of the end closure and the angles of the shoulder to vertical are selected so that there is a substantial annular zone of contact between the shoulder

end and the inner surface of the can body from the can seam axially

is present inside.

* _{/ and} 00 983 5/0027

The invention will now also be based on the accompanying figures described in detail, all from the description and the Figures emerging details or features can contribute to the solution of the task within the meaning of the invention and with the Willing to patent were included in the application, It show:

Pig, Fig. 1 is a partially schematic plan view showing a method and Fig. 11 illustrates an apparatus in accordance with the invention for making helically wound can bodies;

. Figure 2 is a vertical sectional view taken along line 2-2 the Pig, 1;

Pig, Figure 5 is a vertical sectional view taken along line 3-3 the pig. 1;

Pig. Figure 4 is a cross-section of an outer layered sheet for a can body according to the invention

Pig. Figure 5 is a cross section of a middle layered ply or body ply for a can body according to the invention;

Pig * 6 is a cross-section of a further middle layered ply or body ply for a broom body according to the invention;

fig «7« in the cross-section of an inner area called position or ' 3p «rr-biw. Sohutalftg · for tlmtn Doeenkkörpers according to the

Invention; FIGS. 4-7 corresponding essentially the practical scale in terms of width, however, are greatly increased in terms of thickness by the Better display the structure of the various layers;

Fig. 8 is a side view of a can body produced according to the method and is made with the device according to "Figure 1;

Figure 9 is an enlarged cross-section of the can body wall taken along line 9-9 of Figure 8;

Fig. 10 is a cross section of a typical can end sealing element; which is constructed according to the invention;

11 is a partial longitudinal section of a can body showing the expanded Edge shows which is formed prior to assembly of the end closure element with the can body will;

Figure 12 is an enlarged partial sectional view of the end closure element 10, which is processed so that there is a curled edge and an annular layer a sealing material;

Pig. 13 is an enlarged Teilsohnittansioht that an interim "point in ZuBammenbauvorgang of the can body and Endversohlusses represents \

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fei- :.

FIG. 14 shows a view similar to FIG. 13 at a more advanced stage Point in operation; ·

Pig. 15 one of the figures. 14 similar view at an even further . advanced point in the work process;

FIG. 16 is a view similar to FIG. 15 on a still further basis advanced point in the work process;

FIG. 17 is a view similar to FIG. 16, but showing the full extent of FIG depicts permanently assembled can body and termination;

Fig. 18 is a fragmentary vertical sectional view showing the end assembly

• a modified can body according to the invention. represents and +

19 is a view similar to FIG. 17, but of construction of Fig. 18 «,

Although the invention relates primarily to cans for packaging products such as beer and "ale" however, it is to be understood that the principles of the invention also apply to cans for packaging other products can be.

Reference is now made to the drawings, in particular on Fig. 1. In this is a winding machine for a screw

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Shaped tube shown, which consists essentially of an ordinary construction, but certain changes according to the Invention having.

According to FIG. 1, a four-layer pipe 10 on a cylindrical mandrel 11 by a winding belt 12 settled. Movement is given to the belt 12 by winding pulleys 13 and H «rteilt, which fits in conventional Way to be driven. According to FIG. 1, the pipe is pushed further to the left along the mandrel 11, as indicated by the arrow is shown. Consecutive lengths of "10" tube will be cut off at predetermined points by a suitable saw or knife, which is indicated schematically at 16 is to form individual can bodies 17. It can be one Pipe length or a large number of pipe lengths cut off at the same time are, and the separation process is carried out so that the usual printing on the outer layer of each Can is in the correct coverage or setting,

. what is known per se.

The four layers that make up the tube 10 are labeled 18, 19, 20 and 21, respectively. These layers are made up of common roles (not algae) fed. Layer 18 is the first to appear the mandrel 11 is wound up and it serves as a protective or protective device Locked position of the can body. Layer 19 is the second to be rolled up and, as shown, overlies the barrier layer Layer 20 is the third to be rolled up, and it lies over layer 19 as shown. Layers 19 and 20 are the can body layers and they primarily provide the structural

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- ^ ₁ J _- 1,807,870

strength for the can body, layer 21 is the last Layer that is wound up and overlying body layer 20. Layer 21 serves as the outside of the can body and becomes usually provided with decorative or advertising images or writing on their outer surface, which is common · The layer 21 thus forms the can label and is called the outer Position or labeling position.

The execution of the protective or blocking layer 18 is shown in the existing in Hg. 7. The barrier layer 18 is formed as a lamella or a layered body made of three layers, the inner layer 18A being a slippery and sanitary coating, the middle layer 18B being a metal foil, preferably an aluminum foil, and the outer layer 180 being made of a heat-sealable thermoplastic material , preferably made of low specific gravity polyethylene. Polyethylene with a low specific weight is understood to mean a polyethylene which has a specific weight in the range from about 0.910 to 0.925 g per cm. A polyethylene with a medium specific | Weight would have a specific weight in the range of about 0.925 to 0.945, while a polyethylene with a high specific gravity would beeitzen a specific gravity greater than about 0.945 "The used herein, the term" sanitary "should not only clean, but also mean tasteless and odorless" in other words, it should act a coating eioJi UiB which the packaged product no taste or overall * ruoh transfers *

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■ Although polyethylene is particularly suitable for Used as a heat sealable thermoplastic material for layer 180 and like layers of other layers has shown, other materials can also be used «The practical current compression or extrusion * - coatings are polystyrene and polymers or copolymers of lower olefins (ethylene, propylene and butylene). In the Low molecular weight heat fusible ethylene ethylene coatings, Ethylene vinyl acetate or wax mixtures from one of the two resins are suitable.

The layer 18B should be a self-supporting film without pores. This layer serves primarily as moisture and gas seals for the can body and provides the structural Basis for the barrier layer 18 when it is wound onto the mandrel 11 will. The ply 18B should be thin, but not so thin that wrinkling problems occur in winding affect. Aluminum foil 1 mil or 0.001 inch (0.025 mm) thick is suitable for this purpose exposed. From the standpoint of a non-porous layer, an aluminum foil having a thickness down to about (0.012 mrol (0.5mil) problems however, in terms of wrinkling, a somewhat thicker film appears to be more desirable in current treatment or processing methods.

While aluminum foil has been found to be preferred, other foils can be used, e.g. B «one with tin 0.05 mm (2 mil) plated steel foil. It is believed,

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BATH ORIGINAL

that the layer 18B could also be made of plastic, provided that it blends with the rest of the Can tolerate, holds back pressurized gas and does not cause sticking to the mandrel. In this respect, no suitable one can be found Find plastic.

The slippery or slippery and sanitary cover Forming layer 18A has three principal tasks. These are to facilitate sliding relative to the mandrel surface; H. the Reduction of friction and avoidance of sticking of the | Layer 18 on the mandrel 11, the creation of a sanitary coating, which prevents direct contact between the metal layer 18B and the contents of the can and the sealing of small ones Holes or pores as they may be present or are formed in the layer 18B. Albeit in this respect the If layer 18B should be pore-free, then a complete avoidance of pores is a practical commercial processing hardly possible with available equipment and materials, so that it is desirable to provide a sealing layer that is such small Seals holes or pores, if they exist.

The coating forming layer 18A is kept quite thin. In a typical case, it can be applied at a weight of about 0.5 to 2.5 pounds per ream (270 m), with a ream «3,000 sq.ft is. The material used for the coating can e.g. B. from one of the commercially available vinyl materials exist in a non-toxic solution system. The vinyl polymer material, sold by the Adcote Chemical Company under the designation Adcote 501 is a specific example of one

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- ι ο -

suitable slippery coating or slip coating. The coating can be applied in any conventional manner, for example by spraying, rolling or brushing,

The polyethylene layer 18C is preferably applied to the aluminum foil surface applied by pressing (extrusion). The -; - polyethylene layer 18C is, as will be described, for heat sealing used; and also serves as a moisture and gas barrier, which complements the aluminum foil layer 18B. The polyfe) Ethylene further assists in sealing any small holes or pores that may or may not be present in the aluminum foil be trained in this. The polyethylene coating weight can be selected as desired, with a typically low

riger value is about 1.6 kg per 270 m (3> 6 pounds per ream), the results in a coating thickness of about 0.006 mm (1/4 mil). The thickness of the polyethylene layer should be sufficient to ensure a good heat seal to enable. In many cases a polyethylene thickness of 0.018 mm (3/4 mil) may be desired.

A free polyethylene coated metal foil can be heat sealed directly to itself with the polyethylene contacting the slippery or slip coating. Because there is no exposed paper edge with such a construction, as is usually the case with protective layers of helically wound ones. Doses is the case, there is no need to form a turned fang around seam (tucked seam), or a wound-junction, the use of a Schutzabäiohtung, which is underlaid with a kraft paper, requires a captured suture or a wound connection and produces a small

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Area: which can be about 0.1 - 25 mm (4 «5 mils) thicker than the ■ best of the barrier layer Do you want to allow small openings to be formed in the areas of contact with the metal end caps, making it difficult _? to obtain leak-proof end-failure arrangements «,

The moisture and pressure properties of polyethylene covered metal foil barrier layer, the gate standing I is described, have proven to be well suited for cans to «

would take from beer and "ale" exposed ...

As shown in Fig of _e 1 and 2, the barrier layer 18 is so AIIF the mandrel 11 is wound, that a Toll Permanent blocking or Sehutzsöhiöhtlage is ausgebild0t? The front edge of the layer 18, άβτ first and at 3 ^eä ®to moment the thorn 11 touches (the left hand in lig _e 1) _s overlaps the backward sand of the goalkeeper. Spersjlage-Wiiiöuag, where dureil an overlap, as in. | figo 9 is violated, is formed * With this overlap, the bottom layer is the polyethylene of iage -18Gj ,. nd the oasiuberliegeaos; Area of oil transfer to the location

2) he sells the polyethylene layer 180 ₉ the In der Uberlappmng 1st, ä «h * ₉ -der ^ aig © -? - the the ßleitüberaugslage: 18A maökf olg®na®n lilm &vaig" bevUksi, Mira atirsheiäs -Flamme 22 'the - aureh- oinea & οϊϊ * 4Θ3? 23 on ditsea gariehiet- wir dt ₀

V sit? : - .λ. . BATH ORIGINAL

wise the polyethylene surface of the barrier layer in the area the rear edge on the mandrel immediately before this comes into contact with the sliding coating on the leading edge of the next turn. The flame heats and softens the contacted one Polyethylene surface in such a way that it is with the sliding cover heat sealed.

The barrier layer feed or tape is held under considerable tension so that the barrier layer windings W are wound tightly and the contacting polyethylene slip coated surfaces are compressed under book pressure to form a tight overlap. "The webs for the other layers are similarly held under quite a tension

Although preferably the polyethylene coating 18C layer * -. like applied to the metal foil layer 18B «, the contact. de Folyä'tliyleiisehiolit the first body layer in the case hers & sucked. are that it is ervainsslrfe _s den.Überzug omit 180th ' In such a case, however, an adhesive connection of the overlapping sections of the barrier layer should be provided in order to form a gas-tight seal. A schmelöesides in Wärae adhesive ϊητ- can this purpose be used for "B # a polyethylene or polyamide low molecular weight / Such melting in the heat adhesive can be applied to the Metallfolienoberflache- iia überlappungsbei'sich and .by the flame 22 activated as described above in connection with the Polyäthyl © Einüberauglöö-

BAD ORlGhMAL 0 3 i 3 δ / 0 Ο 2 t

-19 - ■ "■ ^..;

The construction of the two body plies 19 and 20 is preferred the same and where Bosen main layers 19A and 2OA as well as ^ polyethylene layers 19B and 2ΌΒ, which by pressing on the! Can main layers are upset. ; "';

The Bosen base or main layers of the body layers provide the main structural strength for the broom body and should therefore be made from relatively strong materials, a kraft paper Bosen base material has proven to be particularly well suited for this purpose. The minimum usable A paper weight for the Bosen main layers depends ζ * Τ Ϋ on the paper _{tensile strength.} It has been found here that to encounter bad failures through infiltration during long periods of stress, the bad main paper in the finished bad is not one .

should be subjected to long-term stress, which is approximately 40 -50 ^ exceeds its tensile strength *

Another factor that influences the main Bosen paper weight is the winding angle of the body layers. As is customary in pipe winding technology, the winding angle is normal between the longitudinal axis of the embossed layer, when it approaches the born, and a line measured to the axis of the Bornes. This angle is for position 19 as the angle «<in; JFig. 1 shown. The wrap angle is important in relation to the pestigelt, since most "Ourdrinier" paperboard ¹¹ has greater strength in the direction in which it is made than in a cross direction. It is thus desirable to have the advantage of greater machine direction strength of the paper by making a winding angle as small as practical '\

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possible, is applied. For a pressurized can has a Rocking angle of about 27 ° has proven to be extremely beneficial. It is noted that the circumferential stress (hoop stress) in a cylindrical container such as a Beer can, is twice as large as the longitudinal tension, and thus it is desirable to have the can body strength around the circumference of the can to a maximum value * It is also desirable that the same angle of inclination for the blocking and labeling areas, d, h. 27 °, used will.

If a pressure of 5 »9-6.6 kg / cm (85-95 psi) is to be accommodated, which can be expected when beer is pasteurized at $ 0 ° C (14-0 ° P), the cans can - Main layers for the body plies are suitably about 94.5 kg / 270 m (210 pounds per ream), assuming a wrap angle of 27 °. Such a carton is about 0.4 mm (17 mils) thick .

As a result of the small increase in the pipe diameter caused by the presence of the first body ply 19, should the second body position 20 may be slightly wider than the first position, e.g. One can, size 211 (12 ounce) can have a 19 ply with a 4-5 / 2 inches (104 mm) wide, while the sheet may be 4-3 / 16-inch (106 mm) wide.

In general, it is desirable that the Dosenhauptiagen possess 19A and 19B relatively smooth surfaces · One reason for this is that a smooth paper surface de · Weight

W3S / 0Q27

~ 21 -

of the Polyäthylentiberzuges reduced that for heat sealing the body position is required. Another reason is that a smooth surface on the outer body ply 20 a a smooth base for the lettering layer, which the Appearance of the cans improved considerably. * -

Place the polyethylene layers 193 and 20B on the body plies some moisture and gas sealing properties, yours The main application, however, is heat sealing «, the polyethylene

layers 19B and 2ÖB are preferably made of polyethylene "" with a low specific weight? and the weight of each layer

- ■ 2 °

can typically be about 4.8 kg per x 270 cm (10.8 pounds per ream). While preferably both Poiyäthylenschichten 19B and 2OB are provided, kanhv as long as the polyethylene layer 18C is provided on the barrier layer 18, the polyethylene layer 19B on the inner body ply 19 can be omitted «,

An important feature of the pressurized can according to the invention is the use of sawn-off or cased connections in the | AWteldu & g body earnings _a Skewing oderAbfäsen promotes the strength of Körperlagen5 by large contact areas are created at the joints, "ialls Stoßverbin ~ äLiingeti used würäetis" vriiräe a Spal-t of meteren; ! Thousands of an inch at the herköfflmliöhen'Wieköln. Such "Sp £'d ^lt; AELE training βίηβτ litze erfflögllohen;; and - \ high pressure ± n äer.Soaa would @l Spesrlage in äleae -strand himeiri" drüek.en * woöu3 | sirtX * -a.? unäioht® Steile. ma, des Eninaht ■ her = -:

; t

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Around a beveled or beveled connection for each body position To create, each body ply web that is fed to the mandrel is passed through a chamfering unit 24, which the Bevel body ply edges as shown at 19C, 19D, 2OC and 2OD is. The chamfering unit 24 can be emery wheels or others Contain suitable devices for chamfering the edges of the body ply.

The polyethylene coating on the body layers can be used to unite the chamfered layer edges in order to form corresponding tubes on the mandrel 11. Preferably, however, an adhesive that melts in the heat is provided to support the connection, as the resulting mowing becomes stronger. For this purpose, parallel ridges can be used in the heat. Melting adhesive on the polyethylene coatings 19B and 20B lift the chamfered edges T90 and 20G. These parallel beads of adhesive are shown at 19E and 20E, respectively, and they can conveniently be deposited in the waste unit 24 on the can main lanes, although they are can be applied in a separate process -

You boss body panels 19 and 20 are under the mandrel 11 of fed to the opposite side as the barrier layer web 18 and wound in the usual manner on the mandrel »with the corresponding Lay complete tubes in each case. The layer 19 comes to rest over the layer 18, while the layer 20 over the situation 19 a ¥ lie comes * The PolyätnylenecMehten! 9B and 2OB show upwards in FIG. 1, which means that these layers with the Polyäthylenschiohten against the inside of the broom body ;?

pointing to "wiokelt" * 003035/0027

BATH ORIGINAL

A number of burners 25, 26, 27 and 28 are arranged above the can-holding track 19 immediately in front of the point at which the track 19 reaches the mandrel 11. Each of the burners 25-28 directs a gas film down onto the polyethylene sheet 19B and completely across the width of the sheet; to temperature-heat the entire polyethylene surface to a heat seal. The letate burner 28 directs preferably: its flame toward the Pölyäthylenflache at the contact point, this situation with äev lock "position 18 on the mandrel 11 'The flame from the burner 28 thus not only heats the polyethylene layer 19B, but also - .. λ underlying barrier layer polyethylene 18C causing maximum heat sealing * As shown in Figure 9 at 19B *, softened polyethylene penetrates from layer 19B into the narrow space at the overlap of layer 18. ";

The burners 25-28 also melt the heat-meltable ones Adhesive beads 19E so that the heat-meltable adhesive supports the formation of the seam.

A set of burners 29 »50, 51 and 52 corresponding to burners 25», is similarly over the can body ply 20 arranged so that the latter forms a tube, as described in Ye binding with layer 19. In this Pail is the polyethylene layer 2OB with the can main paper layer 19A Jaeiß-sealed. "-;

The connection between the rear edge of a turn the layer 19 and the 'front edge of the last turn of the Layer 19 on mandrel 11 is shown at 19F in FIG. The one in the

BATH ORIGINAL

Heat melting adhesive layer created by melting the in of the heat-fusible adhesive beads 19E is formed shown at 19Gr. Layer 19G- glues the chamfered edge 19-D with the polyethylene surface next to the edge 190. The chamfered one Edge 190 thus points upwards in FIG. 9. The corresponding diagonal connection 20F for the layer 20 is similarly with the heat-melting adhesive layer shown at 2OG «. . .

It is important that the entire inner surface of each body position is glued to the underlying layer so that the entire Can body acts as a unit »This adhesive connection or union is made by heat sealing polyethylene and is preferably supplemented in the diagonal joint areas by hot melt adhesive, as described. The use of an adhesive is particularly desirable when the chamfered surfaces 19D and 2OD are rough. When the weight the polyethylene covers 19B and 2OB is considerably enlarged, becomes the requirement for a hot melt adhesive— medium decreased.

The inscription layer 21 is shown in detail in Fig. 4 * The lettering layer is made up of four layers that are stacked together.These are an inner polyethylene layer 21A, a Kraft paper sheet 21B, a polyethylene sheet 21G, and a Metal foil layer 21D. The main strength for the ply 21 becomes created by the position g1B, which, for example, consists of a natural, unilatered kraft paper of 25 pounds per ream (11 j 2 kg

p
per 270 m). The kraft paper weight is wisely in the range of about 11.2 to 13.5 kg (25 to 30 pounds)

009836/002?

~ 25 -

The polyethylene sheets 21A and 2TC can be pinned to opposite sides of the paper 21B in a conventional manner or applied as a coating. The outer layer of the metal foil can also be on .das polyethylene in a known manner to be piled up "

The foil layer 21D is preferably an aluminum foil and can thus be thin. be as desired * as long as it is strong enough to be stacked on top of the paper «typically, the foil sheet 21D can be 0.0088 mm (0.00035 inches), although satisfactorily- <| results have been obtained with - a 0.007 mm (0.000285. inch) "aluminum foil *,.

The polyethylene layers 21A and 210 may each, for example, _e with einom weight of 4.8 kg per 270 m (10.8 pounds per ream) mounted to be ,. The outer Polyäthylenlage 2IC preferably has the Besehriftungslage resistant an average specific gravity * against one !! wrinkle formation on the can - to make] ließ- 'banä ,, the iniiere Polyäthylenlage 21A preferably has a low specific * ö-e \ ^(iicht? _? to facilitate heat sealing with the outer body layer 20 «

As the lettering position & alm 21 is fed towards the Hohr on ae lorn 11 from the same side} as the Sge3? Rlägebahn. 18 ₉ However, BM one- Yorgesoiioliesen. o.de.r styöajjaagsaiwäafba ·; located. . ■: Place rela-fcliT "to-the-preliminary; e»: .. 2isgea. IS ₉ 19 uM, 2O ₀ _ lss_ is.; '

äie B © B0tel, ftosgsla, g ©;: 21-sitf is © 'ä

bad original

does not spoil. The path 21 is, as in! Ig. 1 and 5 is supplied via the Born T1. A burner 33 is arranged under the web 21 in front of the web section which contacts the tube on the mandrel 11. The burner 33 directs a flame gas to the polyethylene sheet 21A to heat uia the entire width of the layer 21A to a heat sealing temperature "

The outer paper layer 20A of the tube on the mandrel 11 is heated prior to contact with the layer 21 by a gas flame directed onto the latter by a burner 34. It is desirable that the burner 34 heats the entire outer surface of the layer 20A, around the heat sealing of the heated. To facilitate Polyäthylenlage 21A on this, 2u this purpose should! Ränge- be of the burner matched 34 ^a uf AEIE rotational speed of the tube on the mandrel 11, Falls ₉ further burners can be provided, in Uisfangsriehtung in spaced apart to the desired entire surface of the layer 20A to be heated. The tension exerted on the Beschriftungslagebahn21 to se- large Seih / so glued the same close to the Papieroberfläciie 2OA able 20 \ fird _o ·

The front edge of the web 21 (in Fig «T left) overlaps the rear edge of the voriiei? Continuous winding of the web 21 to be a simple lap seam to form _s such as shown in öies JFXg ₉ 9 * The polyethylene Voa. Layer 21A fills clieoe overlapping *

approaches from ₅ like this at 2Ii. roped ₉ v / ordureu is a good one

achieved isi ^ dj similar to cle ^ eiiiifeiT .. äes polyethylene

la der Sperrlsge- »lla © j» l, appiiSgS! iiilits :, '. _: -

BATH ORIGINAL

i60787O

It is recalled that the near-thickness measurement in Pig « S is extraordinarily enlarged. So even though the cover overlap seam in FIG. 9 looks large, this overlap seam is actually so thin that it is hardly noticeable in the finished can body.

Each layer of the can body according to the invention has, as described, one or more layers, or coatings, of polyethylene on top. As is currently known, polyethylene is the most suitable material for this purpose, taking into account m factors such as cost; the heat sealability, moisture-vapor- barrier properties viLä simple press lamination. However, other plastics can be found; are the appropriate qualities or properties für.diese purposes "have, and the polyethylene can be in one or more layers replaced by such a plastics material. In-general, the polymers and copolymers exerts low olefins l · (propylene, ethylene and Btitylen) "Which can be pressed out in molten form and applied to paper or metal, as well as heat-sealed, can be used instead of polyethylene."

It is desirable that the moisture-vapor barrier properties of the various polyethylene layers be as high as possible. In this context, attention is drawn to the processes and products of US Pat. _;

is an important advantage of the can body according to the invention the local moisture content, which is based on the absence of moisture

: 009835/0027 \ > ^ _{At) 0RjQINAL}

807170

Containing »Kleibetöffen. mzä® & m £ m ¥ m ± 8 $ ₉ die Heasstelinag 'geta «A # iiI

As a result ϋ # © @ ϋ low IPeue & tegeb & lts kSsnen £ in a Flieifcandpreufang imter T @ ^ ¥ # sitt »f eise? tind Tesse33lieSeii33? ieJittmg .laeaygeeteH * w # M # a? © to © anybody

single tob of Epto 10. ei9! geta? es »t € ) the foris

M @ 3i of the 3to

as the © ^ ei 35 Ib fig # 11 is shown, on the

Expanding Isann is sitting tfflcmt »like © © in the fseli world

the © im®

will,

» L # i

currently*

17 C ^ i

igt *

the

sit

t ;, g # S *. in the

di «gew & lislläb part.

BAD OPJQIMAL

1807870

according to the creation of a termination and a ■ Ettdnaht Konstruktiott, which are specially designed to maintain the construction are suitable"

Me correct execution and attachment of the termination it is a very important "point of the invention" particularly related to overcoming two main problems. One of these Problems are the inclination of the can body ^ end hook or bow, to unroll so that the end of the can is omitted or can fly away. The "other problem is the tilt of the can end to permanently deform or rise under load, so that the end can flex outward and either fly away or cause a pressure drop.

"S" -lii

The methods and constructions used in connection with metal cans are not suitable for a helically wound paper can that is intended to hold a »pressure. In that regard, it is common for metal cans to use a simple double seam or rim with the end closure edge held in a hook at the can end. This works well with metal cans because the metal can body wall is pliable and relatively thin, typically 0.15 - 0.25 mm (6.6 to 10 mils), which allows the formation of a good hook cut and a tight seam . The shear strength of a metal can body is also extraordinarily high, so that the end hook only slightly

he who has absolutely no tendency to cut his way through the wall of the can, a metal can body is further essentially _:

.pht susaamiendrüakbar and does not jump back, v / äs to one tight, mechanically tight seam. In the case of a

008831 / Oöai

- ■ 30 -

shaped wrapped can, the side wall is proportionate thick, on the order of 1 mm (40 mils), making it difficult to form a real body hook so that under high pressure the body hook has a tendency to move to roll off. The principal structural features of the end closure according to the invention that this tendency with respect to the unwinding overcome, consist of the application of an extended flattening and an extended rim on the closure. The tendency of the end closure according to the invention to rise or bending open is mainly limited by deep drawing the end closure, as will be described below.

The Pig. 10 shows a can end closure according to the invention, with certain dimensions plotted for easy reference. The end closure 36 has an edge 37, a flat 38, a shoulder 39, a wall recess 40 and an end 'or End wall 41 · The shoulder, the flat and the edge form the end closure edge area. The edge 37 has the dimension D and should be longer than usual ends, typically 0.37 to 0.5 mm (15 to 20 mils) longer, -,

The dimensions listed here will of course vary with can sizes, wall thicknesses, and other factors. The dimensions are typical examples of a can having an inside diameter of about 65.3 ^ a (2.573 inches) (which corresponds to a mandrel diameter of 2.570 "= 65.2 mm), a height of 123 mm (4.875") _t body wall thickness of approximately 1 mm (40 mils) and a maximum internal gas pressure of 5.9 kg / cm (85 psi)

00983S / Ö027

having. The bad body height becomes 'natural' with the of the.! Flange reduced, e.g. B »on 122.0 bhd (4.860 'inches) A typical value for the loseaatSrperinnenäiaretoes ^ er aiö Flange end is 68 jmn (2.687 zoIl) -T The EndYersehluS feann typical, aas a 12.3 mil ^ egg ^ lech (0.3 times} made become that (thicker than usual for evil ends,

The flattening 38 corresponds to the dimension 3 land % mm 0.75 (30 mos) longer than a usual Ahflaehaingsläiage * Bie shoulder 39 corresponds to the difference between the sehlußhöhe $ ßämes & wßg S ^ and the handhShe shoulder. 39 scsll ziejalic3i be steep, which should be about 4 ° '- 6 ° - so that it has about the usual mertes iat, the height of the wall recess 40 dimension S ₉ nmä. she is quite a bit bigger than WäLißh? z # B,

Value £ pr in the AltaessimgeB shown in Fig. 10 for a

«3

(65.6

-. © »221 SsslX (* 5» 6 mm} '

- 0 * 24-5 inches, i 6 '- mm)

-; © ^ © B7 inches C'2 ■. /
'- = 0.152 -ZisII-C ^: 3 »β

- - 4 Ms έ Sxaä

the edge 37 rolled to have a rounded cross section and to obtain an inwardly turned edge 42 as shown in Figure 12, an annular sheet of sealing material 43, which can be of any suitable design, is also applied to the inner surface of the can end closure upset. It is desirable that as much of the sealing material as possible, preferably all of the amount, in the Can end area between approximately the center of the flat 38 and approximately the center of the shoulder 39 is included. In the ^ End seam construction according to the invention seals a sealing material, that 'is located about the center of the flat 38 also does not decrease and takes up space with paper should be filled, while the sealing material, which is arranged over approximately the middle of the shoulder 39, also not seals.

When the can end 36 is combined with the can body 17, the can end in the state shown in FIG. 12 and the flared open end of the can body as shown in FIG. 11 are compressed. The inner diameter of the can body 17 is smaller than the dimensions A of the can end, so that the can body has to be stretched quite a bit !? When the can end is pressed onto the can body. For the typical dimensions given above, this difference in diameter is 65.6 mm - 65.3 mm or 0.3 mm (2.588 " - 2.573" or 0.015 "). This expansion takes place before the haht is started . The flame locking to which the can body is subjected during the pipe winding process, in particular the flame locking processes that directly affect the body layers.

009335/0027

influence, leading to a broom body that significantly ; is stiffer than is usually the case with helically wound

Cans, and this stiffness allows the can to withstand the tensile stresses to which it is subjected, when the body and the end of the can are pressed together. Fig. 1 shows the body and the end of the can pressed together, the body of the can being so expanded that it not only forms the shoulder surface but also a rope of the flattening touched. .

According to FIG. 13 and also according to FIGS. H-I7, the. actual seam area outwards from approximately the middle of the shoulder 39, with the beginning of the Hahtbereiehes approximately at the Position 44 is.

Since the closure height (dimension C) is relatively large and the shoulder runs steeply (small angle Θ) there is a certain contact between the switch 59 and the inner surface of the boar body 17 from the band seam inwards, i.e. is from point 44 inwardly, The extent of this contact, which extends approximately from OCE point 44 to point 45, may typically be about 1.25 BSBJ (50 mils) · amount Sa of the can body in this Berührungafcereieh extended supports Beibungskraft between äem Bosankiirper and the shoulder

iteritalb the Hafttzone the Sioherimg or holding de © Dosenendea 36 in the installation position and the pressure-tight relationship for DoeenJcürper,

Di · Hg * 14 aelgt another Sin ^ oXleii 4 «* Boeeavereohluß ··

. BADORiGSNAL

randes and a slight separation of the can wall body layers 19 and 20. This separation takes place mainly because the corresponding body position ends when rolling and sewing process over * wander different web lengths. FIG. 15 shows the continued curling of the can closure rim and a reverse turning of the severed end dea? outer body wall layer 20. According to FIG. 16, the rolling of the The edge of the can closure is almost complete. "Pig. Figure 16 also shows a tight overlap of the separated ends of the body wall fe and 20.

Finally, FIG. 17 shows the completely rolled up can end, with all layers of the can wall between the edge 37 and the shoulder 39 and between the edge 37 and the flat are tightly pressed together. It is shown in Fig. 17 that the edge 37 and the flat 38 form a smooth curved hook without forming a sharp angle at the junction of the edge and the flat. The can body end also fills the Space between the edge 37 and the flat 38 completely. The smooth or uniform curved metal hook shape and the complete filling of the metal hook with the can body material greatly reduces the tendency of the metal hook to roll off under pressure and thus allows an increase in the internal gas pressure that can be retained; and also an increase in the length of time that such high pressures are maintained · This construction also reduces the tendency of the sharp metal hook to clasp the can body wall hook damage or shear off that retracts into the seam. The elongated center of the Afeflaeii and RandäbsoJ, on the

009835/0027

BATH ORIGINAL

referred to above are "important" in creating the good seam construction. Careful rolling of the can sealing edge in order to achieve the seam according to FIG. 17 is also important to get a good seam.

As shown in Fig. 17, the can body end is deformed in the rolling or crimping process in which the can body and it closure are sealed or sealed. This deformation includes a separation of the ends of the two body layers 19 and 20. The end of the outer body layer 20 shows a tendency to push the end of the inner body layer 19 out of the metal hook. In some cases this tendency can make it difficult to obtain the desired seam construction. To reduce this problem, the end of the can body can be cut! or be chamfered, as at 46 in Fig _t 1;. 8 is shown, so that the ends of the body plies are located in the finished seam in the same height, as shown in Fig. 19. The noted chamfering or chamfering should be done before the can body end is bent over, and it may conveniently be done with an emery or sanding device. It is desirable to perform the beveling or chamfering so that a non-undercut shoulder 47 remains on the inner surface of the inner body ply 19. This shoulder can have a width of about half the thickness of the inner body ply.

With the beveled can body end according to FIG. 18 come the "Ends" of the body layers in the same plane in the dossnend seam, since their exit lengths are different. ? ee

009835/0027

This difference in length should be the same as possible Be the difference in the length of the tracks over which you move the corresponding body layer ends. It is desirable that each layer fills an equal proportion of space in the locking hook.

For a can having the typical dimensions described above, the difference in length of the body ply panels may be typical be approximately * 0.8 mm (0.031 inches). The vertical height between the shoulder 47 and the center of the body position 20 (at the surface 46) should therefore be approximately 0.8 mm (0.031 inch). The corresponding angle between the beveled surface 46 and the Horizontal is about 55 °

The various dimensions listed above are given by way of example only and are not intended as limitations for the can construction according to the invention

009835/002 7

Claims (1)

Patent claims 1. Can for packaging liquid products that must be kept under considerable pressure, with a layered wall construction, which is formed from a series of concentric helically wound layers, characterized by an inner barrier layer (18), which as a layered body from a self-supporting , pore-free, thin, gas pressure-tight film (18B) and a thin, continuous layer of a slippery and sanitary coating (18A) is formed on the inner surface of this film, a body layer (19) consisting of a paper can main layer (19A), wherein at least the one inner surface of the paper can main layer (19A) and the outer surface of the film of the barrier layer (18) have a continuous coating of a heat sealable thermoplastic material (19B, 18C) which heat seals the barrier and body lengths together, and dur £ h an inscription _{layer (2I) 9} as a layered body from an inner, fesißversiegel thermoplastic 9ohicht (21A), which is heat-seal oiled over most of its entire surface with the outer surface of the body layer (19A), a paper layer (21B), which is over the inner layer. (21 A) is there a «? middle therroopiastic layer (21C), 009835/0027 16Q7870 which is applied as a coating to the outer surface of the paper layer (21 B) and a thin metal foil layer (21 L) is formed, which is adhered to the outer surface of the middle thermoplastic layer (21 C). 2. Box according to claim 1, characterized in that the body position. (19) has an additional Has paper can main layer (20 A), which has a continuous heat-sealable thermoplastic coating (20 B) on its inner surface, dec * with the outer surface (19 A) the first mentioned paper can main layer (19 A) about quite a bit whose entire surface is heat sealed. 3. Can according to claim 1 or 2, characterized in that that the inner barrier layer (18) as a layered 'body made of a self-supporting, pore-free, thin metal foil (18 B) a thin continuous layer of a slippery and sanitary Coating (18 A) atf the inner surface of this film and a continuous layer of a heat sealable thermoplastic material (18 C) is formed, which is applied to the outer surface of the film as a coating, wherein the inner layer (18 A) prevents direct contact between the film and the packaged product and the inner and outer layers on each side of the film form moisture and pressure resistant seals. -2- 009835/0027 4. Can after. Claim. 3, marked thereby, that the barrier layer (18) is wound so that a front edge portion of the barrier layer is a rearward The edge portion of the previous turn of the barrier layer overlaps to form a lap joint, wherein the slippery and sanitary coating (18A) of the leading edge portion with the thermoplastic Coating (18 C) of the rear edge portion is heat-sealed. 5. Can according to claim 3 or 4> characterized in that that the body layer has a first layer (19) overlying the barrier layer (18) and a first outer layer Paper can main layer (19 A) as well as a continuous one Layer of a heat sealable thermoplastic Material (19 B) has that. On the inner surface of the first outer paper can main layer (19 A) applied as a coating and is heat-sealed over its entire streams to the thermoplastic material (18C) of the barrier layer (18), and a second layer £ 20) over the first Body layer (19) lies and a second outer paper can head layer (20 A) and a continuous layer made of a heat-sealable thermoplastic material (20 B), which on the inner surface of the second outer Paper can hapt layer (20 A) applied as a coating and over the entire surface with the outer surface (19 A) of the first body layer is heat sealed. -3- 009835/0027 6. Can according to one or more of the preceding claims, characterized in that the can main layer (19) or layers (19, 20) of the body ply are drafted or beveled to fit the paper can head on each hand layer (19, 20) beveled surfaces (19 C, 19 D, 20 C, 20 D) to form, and that the body position so wound is that the thermoplastic coating (19 B, 20 B) on the front land portion of the body ply the beveled paper surface (19 D, 20 D) on the rear edge portion of the previous one ^ The turn of the body position is overlapped and heat-sealed with it in order to form a diagonal connection « 7 * can according to one or more of the preceding claims, characterized in that the inscription layer (21) is wound so that a front land section of the Beschriftungsäage (21) a rear land section of the previous turn of the insultation layer overlaps to form a lap joint, ρ being the front land portion of the inner thermoplastic Layer (21 A) of the inscription layer (21) the metal foil layer (21 D) on the rear land of the previous one Turn of the inscription layer (21) overlaps and with this is heat sealed. -4- 009835/0027 T60787Q '. ^: u ^; '.;. ■. ''.-i ■ ■■ - _: ■■■■■ / ■. ^: 8. Can according to one or more of the preceding claims, thereby g e k e η η ζ e i eh η e t that the heifi ^ sealable thermoplastic materials (18 G, 19 B, 20 B, 21 A, 21 G) are made of polyethylene. 9 · Can according to one or more of the preceding claims, characterized in that geke η η show n _; e -ty that the thermoplastic layer (21 G) applied as a coating to the outer surface of the paper layer of the inscription layer (21) has a specific gravity which is in the range from about 0.925 to 0.94-5 φ, per ecm, and that the remaining thermoplastic layers (18 G, 19 B, 20 B, 21 A ^ have a specific weight that is in the range of about 0.910 to 0.925 gr. per cm. 10. Dose according to one or more of the vorhergehenSen claims, characterized GEK e η η ζ i G @ h net that the gehlüpf membered and sanitary coating (18 A) of the barrier layer (18) / a; niohtgiftigen Tinyl polymer is a _t the Überzugsgewieht • '■ "- ■" ■ ' 2 on the order of about O ₈ 2 to 1 _? 1 kg per 270 m (0.5 t> is, 2 ₄ 5 pounds per 3000 square feet) « 11 · Can close to an oös · meim ^ en 'of the gatekeepers thereby kf η β % ei without t, ä @ 0 thin * metal foil (18 B) ct © r gpt3? Rlsg @ (18,) a foil. “With a dieire read Bftjteloli hair dryer . 0.0- mm itii & -8 * 025 -wm C0 _f 005 inches feie 0.00t 2 inches) is BATH . 12. Can according to one of claims 1 to 10, d a d u r e h indicated that the thin metal foil (18 B) the barrier layer (18) is a tinned steel foil with a thickness is on the order of 0.05 mm (0.002 inches). 13 «© eyelet according to one or more of the preceding claims, characterized in that the thermoplastic material (19 B ¹ ) of the body layer (19) fills all of the empty spaces which, after the blocking layer (18) has been wrapped in the blocking layer overlap joint remain. 14 «can according to one of claims 6-13 ·" through g e k e η η ζ e ic h η e t that the diagonal connections are offset in the corresponding turns of the body layers (19, 20) and that the diagonal connections are thick instruct that are not noticeably greater than the thicknesses of the corresponding body positions are in which they are trained are. 15s can according to one or more of the preceding Claims, characterized by » that the combined tensile strengths of the Doeen main layers (18 * 19, 20> 21) be at least twice the maximum long-term load in each direction, that of the Can body can be subjected in a corresponding direction in use. BAD ORiGiMAL 009035/0027 16 “Can according to one or more of the preceding claims, αί adurchgeke η η ζ e refuses that the body layers (191-20) each have a rocking angle in the order of magnitude of 27 °. 17 * Can according to one of claims 6-13 »characterized by the fact that a layer of an adhesive material (.19 E, 20 E) in each of the diagonal connections between the thermoplastic material (J9B, 20 B) and the paper surface ( 19 A, 20 A) is provided, which ^ reils form a visual connection _s - 18. Can according to claim 17, characterized in that g e k e ηη-ζ e i c h η et that the adhesive (19 E, 20 E) is a heat-meltable version of an adhesive composition, which prior to winding the corresponding Body layers to the can body can be activated through heat. 19 · Can according to one or more of the preceding Claims, characterized in that that the thermoplastic material (21 A) from the innermost Layer of the inscription layer (21) fills all empty spaces within the inscription layer overlap seam in order to a moisture- and pressure-resistant seal on the overlapping seam of the lettering layer and any exposed paper edge within the label layer overlap seam to avoid. -7- 009835/0027 20. Can according to one or more of the preceding claims, characterized in that that the corresponding ends (35) of the can body after are widened on the outside. 21. Can according to one or more of the preceding Claims, characterized in that the respective ends of the can body bevelled or chamfered (46) to form an annular surface at each end of the can which is different from the corresponding Can ends beveled away radially outward. 22. Can according to claim 21, characterized by d a d u r c h, that the bevel (46) begins at a central point in the thickness of the first body ply by one not undercut annular shoulder (47) on each Form the end of the can body. 23. Can according to claim 22, characterized in that g e k e η n- z e i c h η e t that the not undercut shoulder (47) contains the barrier layer (18) at each end of the can body and about half the thickness of the first body layer (19) includes. -8th- 009835/0027 24. Can according to one or more of the preceding claims, with metal end closures for the ends of the can body, each end closure and the corresponding ends of the can body being rolled to form can end seams, characterized in that each end closure (36) is made from a metal disc and contains prior to attachment to the can body; a wall recess (40), an end wall (47) and an annular closure area, formed by a sand (37), M a flat (38) and a shoulder £ 39), the; ^y Shoulder (39) for receiving the open end (35) of the can body is provided and has a maximum diameter which is considerably larger than the inner diameter of the can body is, so that the can body must be expanded when the Can assembly the end, of the can body over the shoulder (39) is pressed, and furthermore the shoulder (39) is pressed has a small angle (Θ-) of the order of 4–6 °, and the shutter has a relatively large height (C) to ^ an annular contact zone of considerable size axially inwardly from the can end seam between the shoulder (39) and the inner surface of the can body create. 25. Can according to claim 24, d a d u r c h g e k β η η ζ e i c hne t that the annular Baiihrungssone between the shoulder ifid, - (39) and the inner surface of the can body a from the can axially inwardly has an axial length on the order of 1.27 mm (0.050 inches). 009835/0027 bad original : 9 ■ - 26o can according to claims 24 and 25, characterized in that the can body over the entire contact sz one between the shoulder (39) and the inner surface of the can body from the can seam axially is vastly extended inside. 27. Can "according to one of claims 24-26, since you r c h marked that the edge. (37) and the ^ flattening (38) are each relatively long and that the seams have flanged U-shaped metal hooks, completely through the corresponding can body ends are filled out. 28. Can according to claim 27, characterized in that that the respective ends of the can bodies are chamfered to at each end of the can body forming an annular surface (46) radially outwardly away from the respective can body ends is tapered, the angle of the tapered surface being selected so that the axial positions of the extreme ends of the respective body plies contained in each end seam are substantially equal to cttodu . -10- 009 835/002 7 ■ "■■. ■■ η ■■■, ■ .ν · 29. Can according to claim 28, d ad u r c h g e k e η nz eich η et that the division of the. Ends of the can body at an angle of the order of 55 ° * to the horizontal is executed, and that the blocking layer (18) and an inner Section (19) of the body position at each end of the can not ' ; body are chamfered,. 30. Can according to one of claims 24-29, d ad urch gek e η η ζ ei ahne t that the Dös enendvers chlüsse are each with an annular layer of a sealing material (43) on its inner surface, which extends from the The center of the flat (38) extends to the center of the shoulder (39) with the remainder of the inner can end closure surfaces being kept free of sealing material. 31. Method of manufacturing helically wound Can body according to one or more of the preceding Claims in which the first layer is wound on a mandrel weä and the following lay over it, g e k en η ζ e lehn et d u r c h winding a strip of the blocking layer (: 1B) on the mandrel (11) for the formation of a first continuous tube, wherein the slippery and sanitary cover (18 A) the Touches the mandrel (s) and a leading edge portion of a each turn overlaps a rear edge section of the previous turn, heating the thermo - ¹ ^ - 009835/00 2 7 plastic layer (18C-) of the rear edge section of the Barrier strip (18) to a heat seal temperature after the strip contacts the mandrel (11), but before the leading edge portion of the subsequent turn in contact comes with the mandrel (11), winding a strip of the body ply (19) on the mandrel (11) and over the blocking layer tube (18) for forming a second continuous tube with the thermoplastic coating of the body ply (19B) being arranged so that it touches the blocking layer (18), chamfering the side edges of the Body position (19) »before it is wound onto the mandrel (11), A around beveled paper surfaces (190, 19D) on each edge of the body ply (19) · to form, the winding process of the body ply (19) being carried out in such a way that the thermoplastic coating (19B) on the front edge portion of the body ply (19) the beveled paper surface (19D) on the rear edge portion of the previous one Wrap of the body ply (19) overlaps, heating the entire width of the thermoplastic layer (19B) of the body ply at a heat sealing temperature, immediately before it comes into contact with the tube below ... (18) on the mandrel (11) comes to thereby pretty much the entire width of the body position (19) ™ heat-seal with the barrier layer (18) and further heat-seal the leading edge portion of the thermoplastic coating (19B) of the body layer (19) with the beveled paper surface underneath, winding a strip of the inscription layer (21) onto the mandrel (11) to form a third continuous tube as the outermost layer of the can body, the inscription layer with its inner heat-sealable layer (21A) being arranged against the mandrel (11), and by ^: heating the entire width of the inner thermoplastic layer (21A) of the inscription layer (21) on a seal "Ig" BADORiGfNAL ■■■ - ■: ■% -'- ■ Ϊ60787Ο temperature, immediately before this: in contact; with the . immediately below Sonr (TS »2Q) aui dem; The mandrel (H) comes in order to helßzuverslegeln * the inscription layer (2i) with the pipe (19, 20) immediately below it across the entire width of the inscription layer (21). 52 · Process for the production of helical wound Can body according to claim 31, in which two body layers are used, g e k e η η ζ eic h η e t du rc h. Winding up a strip of the first body ply (19) on the Mandrel (11) and over the barrier layer ^ tube (1B) on / out a second continuous tube, the thermoplastic Cover (19B) of the first body ply (19) is arranged so that touching the barrier layer (18), winding a strip of the second body layer (20) onto the mandrel (11) and over the second Tube (19) for forming a third continuous tube with the thermoplastic coating (20B) on the second body ply (20) 'is arranged so that it touches the second tube (19), chamfering the side edges of both body layers in front of them Unwinding on the mandrel and heating the entire width of the thernjoplas ti see layer of each body ply. n & oh Anüi ^ iiGk "A o & oi? * 3g ₉ g θ Ii ο a τι sq 1 ο h. « e · t & η ι? ö Ii äoii% m &% sli (3L! s? ä ViGlis'ltt day AwZuzingirag tn der Wasme eeI ^ Belsoiiaon άΰΙοΐΌ '^ αίΊ ¹ tiQt & s Wl ^) an:? Üeu Z & itid of a fast Ku3 ^ sa? l &£; eet £ dÄ £ e & 0 C ' ^J 9e 20 ^ · _a dov üeäa äie sb ^ escferä ^ teE? apier £ lä6heii aas rticlr? ^ ßs? t: Ige & Eandab «4er TorhevgeUoxide ^ Wtudtmg exercises xes? pevl & ge overlapped, . 34. Process for the production of spiral wound ■ Broom body according to one of claims 31 "to 52» thereby. characterized in that the winding angle (Od) for ■ each 'body ply (19, 20) is approximately 27 ° ". 35 · Process for the production of helically wound can bodies according to one of claims 32 to 34, characterized by heating the entire outer Paper surface (20A) of the outermost body ply (20), immediately before it comes into contact with the lettering ply strips (21) This causes the internal thermoplastic to stick together Layer (21A) of the inscription layer (21) with the outer body layer (20) to improve the moisture content of the paper (20A) in the outer body position to be reduced considerably. ^ 6. Process for the manufacture of helically wound can bodies according to claim 35 »marked thereby net that the heating of the entire outer surface of the paper (20A) of the outermost body ply (20) is carried out by touching the outermost paper surface (20A) with a gas flame. . 37 ". A process for producing helically wound container body according to one of claims 31 'to 35 s characterized geke tin ^s;: £ .ie h η © * fe" äaß each ErwärmungsBohritt by: Touch ä © 3 -, m erwärmeii & s surface.? with a gas asflarame causes - 14 ~ 00183570027 38. Device for carrying out the method according to claims 31 "to 37, geke η η ζ eich η etdur ch a pipe winding mandrel (11), a device for winding a strip of the blocking layer (18) onto the mandrel (11) for training ■ ' a first continuous tube with the slippery and sanitary coating (18A) contacting the mandrel (11) and a leading edge portion of each turn overlapping a rear edge portion of the preceding turn, a first filament burner device (23) arranged to that it directs a flame onto the thermoplastic layer (.18A) of the rearward edge portion of the barrier ply strip (18) to heat it to a heat sealing temperature after the strip contacts the mandrel (11) but before the leading edge portion of the subsequent turn in Contact with this comes, a device (24) for winding a strip of the body layer (19) on the mandrel (11) and over the barrier layer tube (18) to form a two ith a continuous tube with the thermoplastic coating (19B) of the body ply (19) arranged to contact the barrier ply (18), means for chamfering or chamfering the side edges of the body ply (19) prior to being wound onto the mandrel (11) to form beveled embossing surfaces (19C, 19D) on each edge of the body ply (19), the body ply being arranged during winding so that the thermoplastic coating (19B) at the front edge portion: the body ply (19) is the beveled paper surface (19D) on the. '■ \ rear edge portion of the preceding turn of the body ply (19) overlaps a second flame-Brennervorrichtüng (25-28) for heating the entire width of the thermoplastic layer - 15 - 009835/0027 Sl (19B) the body ply (19) to a heat sealing temperature, immediately before it comes into contact with the underlying tube on the mandrel (11), thereby covering the entire width heat sealing the body ply (19) to the barrier ply (18) and further the leading edge portion of the thermoplastic The cover (19B) of the body ply (19) to the underlying beveled paper surface (19D), the second flame burner device (25-28) comprises a plurality of individual burners, each transverse to the body position strip (19) are arranged next to the point of contact with the underlying pipe on the mandrel (11), a device for winding a strip of the inscription layer (21) onto the mandrel (11) to form a third continuous one Tube as the outermost layer of the can body, the labeling layer (21) with its inner heat-sealable layer (21A) arranged against the mandrel (11) and a front edge portion the inscription layer (21) is arranged so that it has a rear edge portion of the preceding turn of the Inscription layer (21) overlaps, and by a third flame burner device (33) for heating the entire width of the inner thermoplastic layer (21A) of the drape layer (21) to a heat seal temperature immediately before it comes into contact with the pipe immediately below The mandrel (11) comes to thereby the inscription layer {21j [with the pipe immediately below it across the entire length Width of the labeling layer (21) hot seal, whereby the Heating the inner thermoplastic sohioht of the? Containment location also serves to the overlapping marginal section of the loading: writing layer (21) to be hot-sealed. * 'j . 009835/0027 M. ^: . "■. · ■■ -." - ■ - 16 ■>. ' _k 39. Device after. Claim 28, § e - """is e η η ζ ei ο to. Η et · through a fourth laraiDen pulp line (J4) which is arranged in such a way that it has an axially running flame on the outer body surface ( 20) at a point immediately before it comes into contact with the "inscription layer" (21), the axial length of the axially extending flame being so great that it warms the entire outer surface of the body layer. . ^:; . : 40. Hetallendverschluß zur Terweiiduiig with a multilayer nn sohraubenförmig wound is evil eineiö 4p claims 1 to ^ 0, boiled e i ze η etdurch a mitHeren circular WaiiäafbgGhnitt (47), an annular recessed wall portion (40). * the "extending axially from the wall portion (47) inside, a xing-shaped shoulder section (39) which is united along an arc with the drawn-in wall section (40)> imdsiß ^ outwards, the shoulder being arranged at a relatively small angle to the vertical, waadQT shoulder section (59) too: Aüfnateae. an open index of the "Bosenkkörpers0a? s äient, as well as # has a jöasimal Buröhinesser (ά), ü & T greater than tej? Jsineiiäu ^ öhiBesssi »the can body is» Jsö daas 4er ^^ Bosenköqpper -mxB§® $ .e1m% wsröen must, vrenn the de © J) os «nk8rpe2? S / wi &? $ Aä" öa§ _: 23os8ms \ isaaJiaaiibäus about .Jiaaiibäus about as de ».-. ■ ■. ■ ti / § iff . Flattening (38) and the height (D) of the edge (37) are not too large, do a large amount of the can body material in the end seam, so that the end seam is subject to the internal pressure in the can and further wherein the height of the closure rim (C) and the angle (θ) of the shoulder (39) to vertical are selected such that there is a substantial annular zone of contact between the shoulder (39) and the inner surface of the can body, from the can end seam is present axially inwards, 41 ο metal termination according to claim 40, characterized characterized in that the angle (θ) of the shoulder (39) to the vertical in the order of 4 ° - 6. 42, metal end cap according to claim 40 or 41, characterized g e k e η ή ζ ei c h η e t »that the smallest diameter the shoulder (39) sa is selected that the broom body is over the * entire annular contact zone is expanded. 43 · MetaXXeiidverse & Luss according to claim 42, characterized geke ζe η η i η h ύ et that the axial height of the annular, shaped contact zone in the order of 1.27 mm (0.050 ■ inches). 44 · Metals velvet according to one of Claims 40 to 43 » d a d u r e h marked »that a ring-shaped So it is made of a sealing material (43) on the inside - Height of the 4th inversion from the middle of the shoulder (29) to zur Hitte de * Abflachting (58) provided 1st »with the remaining 0OS835 / O027 Sections of the inner surface of the termination pretty much irei of the sealing material (43). ■ * 19 - 00 9 83 5/0027