DE2420163C3 - Apparatus for making a stackable conical container - Google Patents

Description

The invention relates to a device to manufacture a stackable conical container according to the preamble of claim I.

Such a device is described in DE-OS 2063549. It shows next to the inside of the container predetermined form dome on an outer mold. The circular sector-shaped Foil blank made of pre-expanded plastic material becomes more frustoconical after being rolled up Shape in the space between the mandrel and the mold together with the separately manufactured one Base made of pre-foamed thermoplastic material, so that the space in between between mandrel and mold is completely filled with material and the conical side wall and the bottom of the container are joined together.

When using such a device, the sector-shaped foil blanks are produced a relatively large amount of waste. Although this can be used again, the production becomes easier but slowed down and made more expensive.

The invention is therefore intended to create a device of the type described at the outset, with which stackable containers can be made from rectangular foil blanks.

This object is achieved according to the invention by what is specified in the characterizing part of claim 1 Characteristics.

In JP-PS 35-11669 a device is also described in which a hose made of thermoplastic After extrusion, material is stretched in the circumferential direction and then cut into sections which under the action of heat on a Hülsenfoimdorn to the desired final shape shrink. The use of a hose is particularly disadvantageous when the outside the cup is to be provided with a pattern, e.g. B. by printing.

It has also long been known that drinking cups and other stackable containers made of foamed thermoplastics, e.g. B. made of polystyrene, have excellent properties and in particular for hot drinks, e.g. B. coffee are suitable. A known such cup is made in one piece and is made directly from foamable 1 or expandable poly & tyrene beads in a steam-heated Foamed shape. When making cups in this way, however, it is necessary to have the side walls, compared to the thickness of the side walls of others insulated cup, to be made thick, in order to give the side walls sufficient strength, rigidity and To give impermeability. The cups require considerably more storage space than before for one comparable number of stackable and insulated beehers was required. Another disadvantage of the cups molded in a steam chamber was that the outer surface of the side wall can only be decorated or printed afterwards, which takes longer as flexographic printing techniques or other sheet-fed printing techniques, with those from previously printed sheets or plates made cups can be decorated. Most of the ones made in steam chambers As a result, cups have no decorated or printed outer surface.

There are also insulated drinking cups made of foamed thermoplastic known, which are made of two parts. Such cups are described in US Pat. No. 3,468,467. The side wall Such a cup is made from a sector-shaped blank made of foamed plastic film. The blank itself is cut out of previously printed sheets or strips of indefinite length. By influencing the density of such a sheet, it is possible to produce a cup with sufficient To produce strength, rigidity and impermeability, which is nevertheless a considerable Has thinner side wall than a cup formed in a steam chamber. The cups made in this way can therefore be stacked in a smaller space. The outside of the cup side walls can be with a attractive decoration can be provided by already forming the side walls of the blank Bow decorated or printed. A disadvantage of these cups compared to those formed in steam chambers Cups is their price, at least in terms of material costs. This is partly because that when cutting the sector-shaped blank from a sheet or a web of normal shape waste arise, just as with the device according to DE-OS 2063549.

With the device according to the invention v / earth cups produced in an economical manner, the good Have properties in use and are versatile. The side wall of such cups can can be made from rectangular blanks without having to accept the expensive waste, which when cutting out sector-shaped blanks Arches or paths are created. The side wall can also be inexpensive with high quality attractive decorations be provided. In addition, the easily stackable cups can be manufactured in compliance with tight manufacturing tolerances so that they can be used in the drinks machine can be reliably removed from a stack. The cups can be used as either one-piece embodiment or as a two-piece embodiment.

The side wall is made from a sheet of shrinkable polystyrene or from a shrinkable sheet of another thermoplastic polymer by severing rectangular blanks from the sheet, preferably after it has been printed or otherwise provided with decorative material. The decorative material is applied to the web in a repetitive pattern by means of flexographer or comparable printing techniques, as it corresponds to the blanks to be separated from the web. A cylindrical sleeve is formed from each blank, the direction of the starting path running along the circumference of the sleeve and the ends of the blank being connected by a liquid-type seam. The sleeve is then pushed over a mandrel, the outer surface of which corresponds to the desired shape of the inner surface of the side wall of the stackable cup; While the sleeve is on the mandrel, it is heated in order to achieve a flat contact with the mandrel's forming surface by means of heat shrinkage. The shrunk sleeve is then pulled off the mandrel. A separate base can be attached to a sidewall so fabricated, either while the sleeve is still on the mandrel or after it has been removed from it. (Older DE patent 2250638)
'The result is a cup with a side wall, the thickness of which is less thick in the area of the largest

Diameter up to greater thickness in the area of smaller diameter increases. This is special advantageous because a thick wall is obtained on the lower part of the cup through which the hand of the user can pass is shielded from the temperature of a hot beverage in the mug.

In addition, the wedge angle of the side wall can be increased slightly in the lower, thicker sections be to the adverse influence of a thicker side wall on the stackability and the to turn off easy nesting and disassembling of the same cups. The the side wall (This cup-forming sleeve, which shrinks when exposed to heat, shrinks near the bottom of the cup stronger, so that the desired, greater wall thickness in the lower portion of the cup arises.

In the following the invention with reference to an Ausführungsbeispieis unier reference to the Drawing explained. It shows

Fig. 1 is a view of a stackable, insulating cup, partially in section,

FIG. 2 shows a section through part of the cup of FIG. 1 on an enlarged scale, in the interior thereof an identical cup is drawn in dashed lines to show the mutual position of the cups in a stack.

Fig. 3 is a plan view of a right te el; ^: f; C rs blank from which the cup shown in Fig. 1 can be manufactured,

4 to 8 are schematic views in which successive Manufacturing steps of a cup made from two individual parts according to FIG. 1 a blank according to FIG. 3 is shown,

9 and 10 are schematic views in which successive manufacturing steps of a a piece of manufactured mug are shown,

11 shows a schematic representation of a device for the production of stackable, insulating cups,

FIG. 12 shows a section through the station for preheating the forming mandrels essentially along the plane 12-12 of FIG. 11;

13 shows a plan view of a device for forming a sleeve-shaped blank, partly in FIG Cut.

13a and 13b are schematic views in which successive working steps of the device for forming a sleeve-shaped blank are shown,

14 shows a section through the carousel shown in FIG. 11 essentially in the plane 14-14,

14a shows a plan view of part of the carrier the guideway for the mandrels attached to the chain of the main conveyor, partly in section,

Fig. 15 is a plan view of the devices for Cut out the disc-shaped bottoms and convey the bottoms, with some parts broken away and others are shown in section,

16 shows the device for punching out the bottom and the device for feeding the web of material and essentially making a cut in the plane 16-16 in Fig. 15, with certain parts broken away,

17 shows a section essentially in the plane 17-17 of Fig. 16,

18 shows a section essentially in the plane 18-18 of FIG. 17 in an enlarged view,

19 shows a side sectional view of part of the device for feeding the material web for the floors, the section runs essentially in the plane 19-19 of FIG. 16,

20 shows a side sectional view of a further section of the device for feeding the material web for the elbows, the section runs essentially in the plane 20-20 of FIG. 16,

21 shows the mutual position of the conveying device for passing on the disc-shaped bases and the main conveyor for the mandrels; it is a side view in section, essentially in the plane 21-21 of FIG. 15,

22 is a side sectional view in the front in the plane 22-22 of Fig. 21,

23 shows a plan view of the carrier for the disk-shaped Bottoms essentially parallel to plane 23-23 of FIG. 22.

24 shows a section through an optionally usable one Design of the continuous oven for shrinking.

25 shows a section through the carousel for welding the bottoms, which is used in the manufacture of a stackable cup made of thermoplastic material made of two individual pieces is used Section runs essentially in the plane 25-25 of Fig. II,

Fig. 2L-λ a plan view of the head for welding the floors,

26 shows a section through a mandrel on an enlarged scale,

27 shows a section on an enlarged scale through a device for ejecting a cup and by a device for attaching a rim to a cup,

28 schematically shows successive manufacturing steps of a cylindrical, sleeve-shaped Blanks,

29 is a section through a device for controlling the flow of hot air, and FIG

FIG. 30 shows a section through the continuous oven for shrinking essentially in the plane 30-30 of FIG Fig. 11.

According to FIGS. 1 and 2, the cup 11 consists of two parts. The cup 11 is formed in that an open-ended, sleeve-shaped blank is formed on a mandrel by shrinkage due to the action of heat. The outer surface of the mandrel corresponds to the desired contour of the inner surfaces of the side wall of the cup. The tubular blank has a relatively high degree of orientation in the circumferential direction. It is made by joining the opposite ends of a rectangular blank by welding or in some other way, so that a vertical, liquid-tight seam is formed. Thus, the cup 11 has a visible, vertical seam 12 on its side wall 13. The side wall 13 of the cup 11 has a larger, continuous section 13 α , which extends from the top of the cup to an inwardly extending shoulder used for stacking 14 extends. The shoulder 14 is provided in the area of the base of the cup and is used to receive the same inserted cup. In this way, there is a minimal distance between stacked cups, as can be seen from FIG. Of course, equiva-

Lunte, / means for stacking; in the side wall of the cup may be provided at a higher point. In this case, the greater part of the side wall is located below the stacking means. Because of the step used in making the betiiur deep shrinkage under the action of heat increases in both. ' Cases the thickness of the side wall of the mug with increasing diameter of the cup a!>, and in the portion of the side wall which normally is grasped by the hand of a user. 'the cup is given a sufficient thickness so that the hand of the hot drink, e.g. B. Coffee, isolated and \;> r heat is protected. At the same time, ·. possible the thickness of the cup in seitvni upper Section to reverberate at a sufficiently small value, so there is a thin, tight mouthpiece 15 of the cup arises, as Fig. I shows. Since an intertwined

"adversely affects an increased wall thickness isl the continuous, larger section 13 «- '" of the side wall 13 of the cup 11 with the decrease in the cup durometer, the wedge angle increases (the / acute angles included between the longitudinal axis of the cup and the tangent of its side wall) shown and the wall thickness also increases. where in a known manner the increasing slope the side wall favors a close stacking of the cups.

The end of the cup 11, which forms the bottom and has a smaller diameter, is marked with an i " essentially horizontally extending bottom 16 closed, which with the side wall 13 is connected in a liquid-tight manner. In the embodiment shown, the bottom 16 is by a disk-shaped Part made of thermoplastic material. forms, which is welded to the material of the side wall and is compatible with it. z. B. made of the same material as the side wall 13. This bottom 16 is liquid-tight with an inwardly curved section of the side wall of the loading: ·> chers z. B. connected by welding or by gluing, as will be described later. The floor however, it can also be molded onto the side wall of the cup, as will also be described later. ■

In FIG. 6, a sleeve-shaped blank is identified by 17, from which the cup shown in FIG. 1 can be manufactured. It is made from a rectangular, sheet-shaped blank made of expanded plastic material, e.g. B. expanded polystyrene produced. Such a blank is gekennzeich- in Fig. 3 with 18 v> net. The blank is obtained by severing from a starting web or sheet of a suitable material, preferably by severing from a continuous web of material which is highly uniaxially oriented in the longitudinal direction. Such a web can be made by slitting a seamless, extruded tube of suitable thermoplastic material along one or more longitudinal lines, the lines, if there are several, running parallel to one another. The required orientation can easily be given to such a path or paths in that the extruded tube, as long as it still has a temperature conducive to orientation, is passed between b5 opposing rollers rotating in the opposite direction, which are driven at peripheral speeds which are substantially above the speed in the longitudinal direction of the thermoplastic material leaving the extruder.

As a rule, the blank 18 should have an imprint or some other decoration on the surface, which afterwards the outer surface of the completed cup forms. For the sake of simplicity, an ornament is shown only in Fig. 3, where it is identified by the reference number 19. It goes without saying that the decoration accordingly in the other views of the blank 18 or of the hollow blank 17 or of the cup 11, the later arise from the blank 18, / u add were.

If necessary, the ornament can be seen lightly and can also be applied in multiple colors relatively cheaply by applying patterns to the starting strip one after the other.

these are separated. This can /. B. by known printing devices such. B. an aniline press or a rotary offset press, as is well known. Since that Shrinking a cylindrical, sleeve-shaped blank onto the shape of the side wall of a stackable cup is associated with a different contraction of the material. must Patterns can be printed onto the web in a shape that is distorted from the desired shape is. so that as the material contracts differently, the printed pattern retains its shape changes so that the desired shape is obtained.

In Figs. 4 and 5, the manufacture of sleeve-shaped Blanks 17 (see. Fig. 6) made of sheet-shaped blanks 18 are shown. The individual, leaf-shaped Blanks 18 are fed to a rotating mandrel 31. The mandrel 31 is fastened on a shaft 32 and is held on this by a washer 33 and a fastening screw 34. The shaft 32 is driven by a motor. The sheet-shaped blank 18 becomes vertical on the mandrel 31 by a series arranged vacuum openings 35 held, which with a vertically extending channel 36 in Are connected and through a radially extending opening 37 with a hollow channel in the middle of the Shaft 32 are connected. The mandrel 31 is attached concentrically to a stripping sleeve 38, which is mounted on an arm and a vertically extending spindle 39 (Fig. 5). The vacuum becomes the the front edge 21 of the blank 18 is pressed against the mandrel 31, and when the mandrel is rotated, the Blank 18 wrapped around the surface of the cylinder formed by the outer surface of dome 31, so that the sleeve-shaped blank 17 is formed. The stripping sleeve 38 is located in their lowered position in which it does not touch the sleeve-shaped blank 17. The mandrel 31 has the from Shaping mandrel, to which the sleeve-shaped blank 17 is fed after its completion, are required Diameter.

When the mandrel 31 has completed one revolution, the rear edge of the blank 18 lies above the front edge Edge, so that an overlapping seam of the sleeve-shaped blank is formed. The manufacture of the Seam is done by joining the overlapping sections of the plastic under heat and pressure; one a liquid-tight seam running over the entire height of the sleeve-shaped blank is obtained as a result, that a heater 40 is attached to the overlapping

sections of the sleeve-shaped blank 17 is imprinted. The heater 40 has a coating 40 ″ made of polytetrafluoroethylene, which prevents the nose of the heater from sticking to the sleeve-shaped blank. The heater 40 is pressed against the overlap of the ends of the tubular blank and the heat supplied by the heater 40 and the pressure exerted by it weld together the overlapping seam so that the seam is substantially thinner than twice the thickness of the plastic material. This creates a tapering edge which is compatible with the thickness of the remainder of the neck-shaped blank 17. The heater 40 is located on a suitable carriage, by means of which it is moved to the sleeve-shaped blank at a suitable time and with a suitable rotational position of the dome M , as long as the seam of the sleeve-shaped blank 17 is welded, pressed against it, and then moved away from it weather".

Optionally, the overlapping seam can be made by a heat-meltable adhesive which is applied to the inner surface of the sheet-shaped blank 18 e.g. B. is applied in the area between the edge 20 and the dashed line A in FIG. The heater 40 heats the area provided with adhesive and causes the overlapping ends of the material wrapped around the mandrel 31 to bond.

To produce a cup 11 made of two parts from one in the manner described produced, sleeve-shaped blank 17 is a mandrel 41 (Fig. 6) is provided. The mandrel 41 has an outer surface 41 α, which has a shape that the desired shape of the inner Surface of the cup 11 or at least the side wall of the cup 11, which consists of the sleeve-shaped Blank 17 is to be shaped, corresponds. The mandrel is suspended from a support 42. The sleeve-shaped blank 17 to be formed on the mandrel 41 is pushed over the latter, with the upper end of the same by an expandable clamping ring 43 in one with the axis of the outer Form surface 41a is held in alignment. The clamping ring 43 has a series of arcuate, the sleeve-shaped blank touching segments, which by an O-shaped spring inward get lost. There is a gap between the clamping ring and the surrounding part of the device provided so that the clamping ring can be expanded in the radial direction to facilitate the introduction of the End of the sleeve-shaped blank 17 between the inner ends of the segments and the end portion the outer mold surface 41 to enable α of the mandrel 41. The clamping ring 43 is in a Recess 48 of the carrier fixed in a position fixed to the axis of the mandrel 41, with the lower Part of the support a removable flange 49 is attached, on which the clamping ring 43 is slidably seated.

If the sleeve-shaped blank is attached over the molding surface 41a of the mandrel 41, the Parts, as shown in Fig. 7, exposed to a heat source in the position described. This can e.g. B. thereby take place that they are brought together in a space exposed to infrared heaters 51, 52 and 53 are, the heaters 5f and 52 are directed on opposite sides of the mandrel 41, and the heater 53 is directed towards the bottom of the mandrel 41. Instead of heating with infrared heaters the sleeve-shaped blank and the mandrel in the position shown can also be heated by that the two are moved through an oven in which hot air is circulated. However, it turned out that the infrared heating can be adjusted more easily and as a result of the penetration of the infrared Radiation works a little faster than heating by forced convection of heated air. In any case, a heat treatment leads to the fact that the section 17 "of the sleeve-shaped blank 17 which over the lateral section of the forml'liichc 41 «is so shrunk that it lies tightly and form-fittingly against it.

A cooling of the inner surface of the blank jr ¹ -senl'örmigen zi during shrinkage: avoid the shrinkage which would obviously hindered, it has proved advantageous that

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is at a high temperature, but not at a higher temperature than the softening point of the thermoplastic material from which the sleeve-shaped blank is made. Made from expanded polystyrene manufactured sleeve-shaped blanks will give good results with a temperature obtained from a 66 ° C preheated mandrel.

Before the sleeve-shaped blank 17 is heated by the heaters 51, 52 and 53, it becomes a disk-shaped one Piece of thermoplastic material 71 from which the bottom 16 of the finished cup is made is to be brought to bear on the bottom of the mandrel 41 coaxially with the sleeve-shaped blank 17. The part 71 is held in this position during the heating by negative pressure. The negative pressure is exerted through a series of circumferentially mounted openings 44 which are marked with through a central spindle section 47 of the mandrel 41 extending vacuum channels 45 and 46 in connection stand, which in turn with a not shown, located outside of the mandrel vacuum source stay in contact. By using two such vacuum channels 45 and 46 it is possible, in that of the outer molding surface 41a of the mandrel 41 and the central spindle 47 the same limited annular space to maintain a vacuum. In the embodiment shown such a vacuum is not required, but it can be used advantageously by Vacuum openings are provided through the mold surface 41a, which the molding support sharp corners in an upper portion of the finished cup, e.g. B. when the cup has a stacking rim in its upper portion or if a cup made of very thin material and / or material of very low density is produced and consequently one in the circumferential direction requires a running stiffening rib near its upper portion.

While the portion of the sleeve-shaped blank 17 which lies above the lateral portion of the molding surface 41a of the mandrel is so shrunk that it has assumed the same shape as this as described above, the end portion of the sleeve-shaped blank 17, which is underneath the smaller one, shrinks Diameter having the end of the mandrel 41 is further, so that an annular, substantially flat portion YIb is

stands, which is formed on the section 17 ", runs inwards from the end having the smaller diameter and the edge section - ". cut of the disk-shaped part 71 overlaps as a continuous edge running in the circumferential direction. During this time, the inner section of the disk-shaped part 71 is also given a permanent shape, which rk: concave curvature of the bottom of the mandrel 41 corresponds to what the heat and the Negative pressure is due to which the disk-shaped part 71 is exposed (before, the one above the inner portion of the disk-shaped part 71 located space there is always a certain connection to the vacuum openings 44). After the shrinking operation, the mandrel 41 is with the shrunk-on tubular blank 17 and the shaped, disc-shaped, bottom-forming Part 71 on the same from the heaters 51, 52 and 53 removed and as shown in Fig. 8 is shown

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80 /) extends away and to the side wall forming section 80 ″ and the annular section 80 /; is molded. The bottom of a cup can be attached to the shrunk blank 80, preferably as long as the blank is still on the mandrel, can be generated by placing on the underside of a such blank heat and pressure are exerted, which leads to the fact that the nozzle 89 c collapses and merges with the flat portion 80 / j. This can be done using a pressing and forming tool 90 go, which has a suitably designed surface that is attached to the underside of the shrunk The blank is pressed on and brings it into the desired final shape. The mold 90 does not normally touch the mandrel 41, as shown in Fig. 9, and can be made from such a line by a spring 91 in a Lag shown in Fig. IO; being pressed, which is used to exert pressure and is useful for welding. Since the

so that a foi [running, running in the circumferential direction and a liquid-tight weld between section 17 /? of the tubular blank 17 and the underlying edge portion of the disk-shaped part 71 is formed. The welding machine 61 is given away on the surface in contact with the workpiece with a non-sticking layer 61 «, which z. B. can consist of polytetrafluoroethylene resin impregnated fiberglass fabric.

After the section 17 /: of the sleeve-shaped blank 17 and the underlying section of the disk-shaped part 71 have been welded in the manner described, the shrunk blank stripped from the mandrel and further processed in a conventional manner. For example can the edge 15 can be rolled into the cup by conventional devices for forming an edge, whereupon the finished cups are checked and collected and a pile of inserted one into the other, the same cup is packed.

A cup, as shown in FIGS. 1 and 2, can also be made in one piece instead of two individual parts Part to be made hot. According to FIGS. 9 and K), such a cup can consist of a sleeve-shaped Blank 80 are produced, which is similar to the sleeve-shaped blank 17, but is longer and one has a relatively long section, which is then below the smaller diameter having the end of the mandrel extends, wherein the mandrel is the same mandrel as that in the Figures 6-8 may be shown. In this case the sleeve-shaped blank from which the cup is made is to be made, before shrinking, a length so great that a substantial part of it located below the small diameter end of the mandrel 41 when the upper Edge of such a sleeve-shaped blank is in the with the upper portion of the molding surface 41a of the mandrel aligned position. As shown in Fig. 9, heat shrinkage occurs from such a sleeve-shaped blank a part with a side wall forming Section 80a, a substantially flat, ring-shaped, integrally formed on the section 80a and in radial direction from its lowermost edge inwardly running section 80b and a relatively small nozzle 80c, which extends longitudinally from the inner edge of the flat section

Time at which the molding tool 90 is pressed against him may not have a temperature high enough to cause the welding to take place and pressing into the mold can be performed without additional heat, the molding tool can 9C have a heater, not shown, and its coming into contact with the workpiece The surface can be made of a material of the same type as that used for the layer 61 'of the tool 61 of Fig. 8 was used, be coated. The bottom is welded during manufacture a cup made of two parts (see Fig. 8) or a cup made of one part (see Fig. 9 and 10), as long as the shrunk blanks still at a sufficiently high temperature, which means that an additional heater can be used for the makes a welding device that can be pressed from below superfluous, so a non-heated welding tool can be used can be used, it is usually not necessary, the surfaces in contact with the workpiece of the welding tool with the special, non-sticking material of the layers 61a resp. 90 «to be provided.

To get good stackability, it is recommended to adjust the angle of the side wall of the stackable To choose cup so that the angle of about 5 to 7 ° at the top of the cup on one Angle of attack of the order of magnitude of at least 15 ° increases on the ground. Based on Given the current economic situation, one gets about the size of a cup for a single serving of coffee or other hot beverage a good ratio of performance and cost, though from a starting sheet made of expanded polystyrene with a thickness of about 0.5 to 0.75 mm and a density of about 0.16 to 0.29 g / ccm, which is preferably in the longitudinal or machine direction an orientation of the order of 75% and an orientation in the transverse direction of 15%. Sheets with a density of 0.16 g / ccm and a thickness of the order of magnitude are sufficient 0.65 mm full for making cups for a single serving of hot beverage. It Other heat-shrinking, expanded thermoplastic materials can also be used can be, e.g. B. polypropylene, polyethylene and polyvinyl chloride. The cups can can of course also be used as a mug for cold drinks.

The insulating properties would not be so important, but they would always be there can still be advantageous as they prevent moisture from condensing on the outer surface of the cup.

Of course, other shapes can be made to suit the designer's needs. For example, a stackable container can be made, which can be at any height Has a cross-section in the form of a square with rounded ends; or it can be a stackable container be produced, which has a fine circular cross-section at the upper end, which gradually merges into the cross-section at the bottom in the form of a square with rounded corners.

It can also be unexpanded, heat-shrinking thermoplastic material Can be used if the stackable cups or containers do not have any heat-insulating egg

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Containers made from such materials by molding or other deep-drawing techniques would do the job in accordance with the present invention Manufactured containers still have advantages, which is the lightness and the small size Cost concerns with which the side wall of the mug can be decorated.

For a better explanation, the parameters of a typical beaker are given.

The side walls of a cup of the shape shown in FIG. 1 made from two individual pieces were made from previously printed, rectangular polystyrene blanks with a density of 0.16 g / ecm with a length of 24 cm and a width of 1 ü. 1 cm and a thickness of 0.65 mm, whereby the blank had an orientation of 75% in the longitudinal or machine direction and in the transverse direction had an orientation of 15%. The bottom parts were made of polystyrene sheets with the same Characteristics established. The finished cups had a total height of 87.6 mm, an inside diameter at the edge of 74.2 mm, an inner diameter inside the stacking shoulder of 49 mm. one Wall thickness at the edge of 0.76 mm, a wall thickness immediately above the stacking shoulder of more than 1 mm and a curved side wall that forms the arc of a circle with a radius of 32.4 cm followed, based on an angle of incidence of 5 ° 30 'at the edge and an outer diameter over the Edge of 80 mm. The difference in height between the bases of the same cups in a stack was 9.9 mm. Each cup had an overflow capacity of 0.255 L and the cups were in terms of stiffness, impermeability to liquids and insulating properties very suitable for hot drinks like coffee, similar mugs have also been found in more satisfactory Made from expanded polystyrene sheets with the following thicknesses and densities:

1. density 0.288 g / cem, thickness 0.65 mm;

2. density 0.16 g / cem, thickness 0.76 mm;

3. density 0.24 g / cem, thickness 0.50 mm; and

4. Density 0.288 g / cem, thickness 0.65 mm.
Except for a certain different one

subsequent expansion of the foamed film, which is obviously due to different effects caused by heat on it and some increase in density in the side wall of the cup in the area of the rim, the density in the side wall of the cup stayed throughout equal to a good approximation the product of the circumference of the side wall with the thickness of the same at that height over a greater one Section of the cup remained relatively constant.

11 to 30, which show an apparatus for To show in more detail the manufacture of cups made of two parts, the reference numerals are for certain Components described above have been increased by 100 in order to refer back to the previous part to facilitate the description and, unless expressly indicated otherwise, the components correspond the ones described above.

11 shows a schematic plan view of a preferred embodiment of a device for producing stackable containers in its entirety. For the description, a plurality of separate working stators will be used. differentiated, which are explained below for themselves. The description of FIG. 11 will begin at the top and in the middle thereof. A main conveyor 250 is shown with a plurality of forming mandrels 141 spaced on it, which is driven in a counterclockwise direction, and a station 300 for preheating the forming mandrels 141, a station 400 for producing the sleeve-shaped blanks (with a sub-unit for handling and Feeding a starting web of thermoplastic material and with a sub-unit for transferring the sleeve-shaped blanks), a station 500 for cutting out the disc-shaped bases (with an initial conveyor for the disc-shaped bases and an end conveyor for the disc-shaped bases, which transfers the bases to the main conveyor), a Tunnel 700 for shrinking, a station 800 for forming the floors and a station 900 for forming an edge happened. Although the various devices and process steps are described separately in the following, it should be remembered that the various steps and operations are timed and properly correlated so that the various devices work together to form a single composite unit.

The main conveyor 250, which moves the mandrels that form the cups through the row of the above-mentioned workstations, moves continuously along a closed path in the form of a flattened ellipse, although paths with a different shape, e.g. a circular shape, can also be used Sheet-shaped blanks 118 made of thermoplastic material and of a predetermined length are applied to mandrels 131 which form sleeve-shaped blanks and which are mounted on a carousel in station 400 below main conveyor 250. The end sections of the blanks 118 are then welded so that sleeve-shaped blanks 117 are produced , which are pushed upwards by a stripping sleeve 138 over the mandrels 141 attached to the main conveyor 250 , which have been preheated before receiving the sleeve-shaped blanks 117. The main conveyor 250 for the mandrels 141 then brings the sleeve-shaped blanks 117 to the transfer conveyor 600 for the sc Disk-shaped bottoms, so that the disk-shaped bottoms 171 are taken along.

The disc-shaped bottoms 171 become two each at once from two webs of material 501 through double punching knives at the bottom of the station 500 for Cut out the disc-shaped bottoms. The cut out bottoms 171 are then successively fed by a linear conveyor 560 to the transfer conveyor 600 for the floors. The latter places the individual bases 171 on the base of the mandrel 141.

After receiving the disk-shaped bottom 171 '", the mandrels 141 for the cups are conveyed through an oven shown as a tunnel 700 for shrinking, in which the sleeve-shaped blank 117 shrinks to the shape of the mandrel 141, the end section 1176 of the sleeve-' ^5- shaped The blank overlaps the disc-shaped, cup-closing base, which has previously been placed on the mandrels. After exiting the tunnel 700 for shrinking, the mandrels are moved to a base-making station 800 where a welding device provides a liquid-tight seal Welding of the bottom section 117Z) of the shrunk sleeve-shaped blank and the disk-shaped bottom 171 is produced. The shaped cup 111 is then conveyed to a rim-generating station 900, in which the cup is removed from the mandrel 141 and placed on a lower mold for cups. The lower mold for cups is then fed to a device for applying a rim, soft is brought into contact with the lower mold of the cup by advancing it, so that the peripheral pouring rim 115 is formed, which ends the production of the cup is removed, and the empty cup lower mold receives a shaped cup 111 which is to be rimmed. After the partially formed cups have been placed in the cup lower mold of the rim application station - ", the mandrels become the Station 300 for preheating the mandrels is promoted and the entire workflow begins anew.

The individual workstations are explained in more detail below. 4-1

Main conveyor and its drive

As shown in Figs. 14 and 25, the main conveyor 250 comprises two endless, vertically spaced chains 260 and a plurality of spaced mandrel carriers 252 which are connected to the chains 260 by arms 261 which are vertically spaced between the chains 260 extend. Each arm 261 has upper and lower support portions 261a on the inner 5-. ren surface of a flat plate 261 b, with each supporting portion 261a has an inwardly facing recess, is pinned in one of the chains 260th The chains 260 are driven at the turning point on the right by a shaft 810 of the main conveyor (see FIGS. 11 and 25) and vertically spaced, horizontally running chain wheels 234 and 235 which are at the level of the recesses in the Carrier sections 261a are attached. The chains 260 are carried by two following chain wheels 234 'and 235' which are arranged at a distance from one another and which are arranged perpendicular to a shaft 810 'of the deflection station at the left end of the device.

At opposite ends of the main conveyor path are guide way supports on the frame of the machine 266 attached. Each guideway support 266 has a hub 266a which passes through Mounted at a vertical distance bearing 810 a with respect to the shafts 810 and 810 'mounted free-running are. Each hub 266a is secured with its respective bearings 810a by clamping rings 266 and bolt 266c connected. The guide way carriers 266 are secured by bolts 266 /, which are inserted into a frame part 266g are screwed in, connected to the frame of the machine. As FIG. 14a shows, the frame parts run 266g are parallel to each other and are spaced outwardly at the axis of the shaft 810 ' attached to the left end of the path of the main conveyor. Fig. 14a also shows that the guide unit 266 at the left end of the machine is provided with longitudinal slots 266/1, which are penetrated by bolts 266 / so that the left guide way carrier 266 with respect to that at the right end of the machine located guide way carrier can be adjusted. By a carrier, which is from a transversal Frame part 266 / is a set screw 266 / screwed and rests against the guide way carrier 266 on the left, whereby this is set. The guideway carrier on the right is with respect to the main drive, which the Shaft 810 set in rotation at the right end of the path of the main conveyor, in a fixed position appropriate.

The guideway supports 266 also have a horizontally extending disk section 266d, which extends outwardly from hub 266a and with a number of circumferentially spaced attached, vertically extending flanges 266e, which at the outer end of the Disk portion 266i / are provided. To the outwardly facing end portion of each guide way carrier are four flanges at 60 ° intervals 266e attached at a distance, as shown in FIG. 14a, with two flanges transverse to the longitudinal direction of the Path of the main conveyor and two flanges are attached so that when reversing traversed angle of 180 ° is divided into three parts.

Devices through which the chains 260 are guided are provided on the guide way carriers 266 and forced to rest when the main conveyor is around the opposite endpoints goes around his way. These devices have a plurality of mounting blocks 265 each of which is attached to one of the flanges 266e is. The guide devices also have an upper guide part 262 in the shape of an arch, which is attached to the upper surface of the mounting blocks 265 by bolts 262a, the guide member 262 has a downwardly pointing, arcuate guide track. The guiding devices also have a fixed on the outer surface of the mounting blocks 265 by bolts 263a, central guide part 263 in the form of an arch, wherein the guide part 263 has an outward-facing, Has arcuate guideway. In addition, the guide devices with one on the Arc-shaped guide member secured by bolts 264a on the lower surface of the mounting blocks 265 264 provided, the guide part 264 one after

having upward pointing, arcuate guide track.

A first, vertically mounted roller 254 is mounted on an inwardly directed, horizontally extending flange 254a on the arm 261 by bolts 254i (FIG. 25). The roller 254 extends upward so that it is received in the downwardly facing, arcuate guide track in the upper guide part 262. A second, horizontally mounted roller 255 is connected to a central portion of the arm 261 by a bolt 255 a. The roller 255 extends inwardly so that it is received in the outwardly facing, arcuate guide path in the central guide part 263. A third roller 256 is b connected to an inwardly extending, horizontally disposed flange 256a in the vicinity of the lower portion of the arm 261 by a bolt 256th The roller 256 extends downward so that it is received in the upwardly facing, arcuate guide track in the lower guide rail 264.

Similar guide devices are provided for the chains 260 in the straight section of the path of the main conveyor, the structure of which is best shown in FIGS. As shown therein, a pair of inwardly facing U-shaped plates 229 extend horizontally between the ends of the transversely extending frame member 266 /, and the plates 229 are supported by downwardly extending L-shaped beams 233. On the outer surface of the plates 229, T-shaped mounting blocks 265 are fixed at regular intervals by bolts 229 and spacers 229b. By bolts, not shown, upper and lower guide parts are on d. η mounting blocks 265 attached. They form vertically aligned, straight upper and lower guideways 230 and 232, respectively. A central guide member is attached to the outer surface of the arm of the mounting block 265 and forms an outwardly facing, straight guideway 231 which runs parallel to the guideways 230 and 232. The guideways 230, 231 and 232 are aligned with the guideways in the guide members 262, 263 and 264, respectively, so that a smooth transition is formed between the curved and straight portions of the path of the main conveyor when the rollers 254, 255 and 256 the guideways traverse.

In the embodiment shown, the main conveyor 250 is at its right-hand end driven. As FIG. 25 shows, the drive of the shaft 810 takes place via a mounted on an arm 815 Worm 814 and a worm gear 816 attached to the lower end of the shaft 810. The Screw 814 is set in rotation by a suitable drive. The worm gear 916 is mounted on a vertical stud bolt 813 by bearings 117 attached at a distance. The shaft 810 is with the hub of the worm gear 816 by bolts 818, which by an enlarged, sleeve-shaped Flange at the lower end of the shaft 810, firmly connected so that they are with this turns.

Each mandrel 141 is, as shown in FIG. 26, rotatably mounted on a spindle 147 which is at the lower End of the carrier 252 is formed. The top of the beams 252 is flattened and tied to the outer Face of the plates 261 ft. Firmly attached by bolts 258 so that the surfaces abut one another. The mandrels 141 are all held on the spindles 147 by a fastening device, which has a collar 270 which is attached at its lower end with circumferentially spaced Flanges 271 is provided, which by bolts 274 on an outwardly protruding flange 141 / are attached to the upper end of the forming dome 141. Within each collar 270 is a ply * 269 coaxially

in attached and is secured by snap rings 272, which mounted in circular recesses in the spacer and on the top and bottom surfaces of the collar 270, held in a position surrounding the respective mandrel 141. the

μ Fastening device is on the spindle 147 positioned by a thrust bearing and an annular part 147 a screwed onto the spindle and attached.

2 (, preheating station for the mandrels

As described above, the mandrels should be at a high temperature during the shrinkage of the cups so that wrinkles are avoided on the sides of the cups. In addition

y> the forming mandrels pass through the preheating station 300. The preheating station shown in FIG

mi molding mandrels an infrared heater 320 and below the path of the main conveyor and on its side opposite the infrared heater 320 Reflector 301 on. The infrared heater 320 can be used in connection with the shrinking of the sleeve

i) shaped blanks 17 are similar or the same as described. The reflectors 301 preferably used, shown in FIG. 12, are L-shaped, with a first arm 301a of the L running below the path of the mandrels and a second arm 301b of the

to L extends upwards over the lower mold section of the mandrel. The arm 301 b of the reflector is secured by insulating spacers 302 and 303 and fastening bolts 305 to vertical frame members 304th The arm 301a of the reflector is fastened to horizontally extending frame parts 307 by insulating spacers 303 and fastening bolts 305; and the infrared heater 320 is also on the horizontally extending frame parts 307 outwards against the end of the arm 301a of the reflector

mi staggered attached.

The upper portion 142o of the mandrel is with a collar 270 which has a recess 251 running in the circumferential direction. On the vertically extending frame parts 304 is

Vi a horizontally extending rail 308 through stud bolts 306, and it runs the length of the preheat station. The rail 308 extends outside of the vertical frame parts 304 and engages in the recesses 251 of the mandrels when these

hu cross the preheating station. Preferably the Rail 308 made of resilient material so that good frictional contact between the rail 308 and the recesses 251 is maintained, causing the mandrels around

tr, its vertical axis will be rotated when passing through run through the preheating station. The mandrels 141 can, for example, in the preheating station on a Can be heated to a temperature of 63 to 67 ° C. That

The amount of heating depends of course on the type of used for the sleeve-shaped blanks Plastic material, d. h, its composition and its thickness. After reaching operating conditions under thermal equilibrium can possibly the mandrels do not preheat.

Device for handling and feeding
the material web

As already described, the sleeve-shaped blanks 117 are produced from a continuous web of material. As FIG. 11 shows, a continuous web of material 415 made of thermoplastic material is fed from a roller 415e which is mounted on a rotating stand outside the left-hand reversing station of the main conveyor and outside its path, the axis of the roller running vertically. The decorated surface of the sheet of material 415 is on the outer surface of the sheet of material if a decoration is provided. The web of material 415 is continuously mi; vertical orientation conveyed along a path which leads past a guide roller 416 and between adjacent guide rollers 417 and 418, which cause an S-shaped winding of the material web. The material web 415 then runs through the gap between a pair of conveyor rollers 419 and then onto a conveyor drum 420 mounted in the vicinity of the path of the main conveyor. The material web 415 runs onto the conveyor drum 420 with the printed surface (if any) on the conveyor drum points inwards. If the material web is decorated with a repetitive pattern, a photo reader (not shown) can be provided between the guide rollers 417, 418 and the guide rollers 419, which keeps the sequence of the repetitive decoration in the longitudinal direction. A rotating, vertical cutting knife 421 attached to the conveyor drum 420 cuts the material web at predetermined intervals so that suitably long blanks are produced from the material from which the side wall of the container is formed.

After the material web 415 has run through the conveyor rollers 419, the front edge of the material web is pressed against the vertical, cylindrical surface of the conveyor drum 420 by a vacuum, which is exerted through a series of vertically arranged openings. The surface of the conveyor drum 420 is provided with three equally spaced sets of vertical openings which are subjected to negative pressure from a suitable source. Each set of openings has two vertical rows of openings. which are optionally connected to the vacuum source so that the front row of openings is connected to the vacuum source in order to pick up the front edge of the material web 41S exactly when the previous blank is cut by the rotating knife 421. This affects the leading edge of the web of material so that it is held on the conveyor drum 420 when the knife 421 cuts the material. The second, rear row of vacuum openings of each set contact the material web 415 before it is cut and exert a tensile force in the longitudinal direction of the material web so that the material is held taut between the roller 419 and the conveyor drum.

If the rotating knife 421 has finished cutting while resting on the vertical surface of the conveyor drum 420 , a negative pressure is exerted on the material web 415 through the front openings on the contact surface of the material web 415 with the conveyor drum. The conveyor drum 420 runs at a higher peripheral speed than the material web fed by the rollers 419, and the difference in speed of the surface creates a slip-clutch-like effect between the vertical surface of the conveyor drum, the front and rear vacuum openings and the material web 415. As a result of this slip clutch-like effect, the front vacuum openings cause a forward movement of the front edge of the material web 415 and a subsequent loss of contact. Before this takes place, however, the rear openings have gripped the material parts 415 and thus continue to maintain the slip-clutch-like effect. After the material web 415 has been cut by the knife 421, the blank 118 assumes the speed of the surface of the conveyor drum . This creates a gap between the rear edge of the blank 118 and the front edge of the fabric web 415, whereby the temporal synchronization of successive blanks and mandrels 131 takes place, which are set in rotation tangentially to the vertical surface of the conveyor drum 420. The slip-clutch-like effect occurring between the conveyor drum 420 and the material web 415 leads to the tensioning of the material between the conveyor drum 420 and the conveyor rollers 419 and keeps the material web taut between them. When the conveyor drum 420 reaches its tangential closest to a mandrel 131, a brief burst of pressurized compressed air is supplied to the vacuum openings holding the blank 118 on the conveyor drum, whereby the front edge of the blank 118 is released from the surface of the conveyor drum 420. At this point in time, the gap between the surface of the dome 131 and the surface of the conveyor drum is approximately one and a half times the thickness of the blank 118.If a dome 131 and the conveyor drum 420 are juxtaposed suitable for transferring the blank 118, that is, the diameters of the Doms 131 and the conveyor drum 420 are on a straight line, so the blank 118 is passed on from the conveyor drum to the mandrel 131. The blank 118 is then held on the mandrel 131 by a set of vertically spaced vacuum openings, as already described with reference to FIG.

Carousel for the mandrels 131
As FIG. 14 shows, a plurality of mandrels 131 for producing the sleeve-shaped blanks are rotatably supported by bearings in the spokes of a carousel 422 which revolves around the shaft 810 ' at the left end of the main conveyor and below its path. 14 shows a mandrel 131 in a position in which a sleeve-shaped blank 117 is being welded together. The carousel 422 has a hub portion 422a and a plurality of radially

running spokes 422 />. which from the hub outwardly and supported by a disk-shaped portion 422c. The outer Each spoke is provided with a bore, one of which is vertical from a bearing 132a accommodates a held shaft 132, and the mandrels 131 are for producing the sleeve-shaped blanks attached to the upper portion of the shafts 132. The shafts 132 are mounted on a circle, which 'Jenseiben has a radius like the way. on which the Forming mandrel 141 other curved left hand of the Weges iles Flauptfderers are moved. The thorns 131 / to manufacture the sleeve-shaped blanks and the mandrels 141 move at the left end of the path of the main conveyor in a vertical relationship to each other and remain in the vertical assignment to each other via a rotation of 1S () °.

The vertical vacuum openings 135 of each mandrel ί, are supplied with negative pressure through an internal chamber 137 (vgi. I ig I Λ; i), and the vacuum is supplied (through an annular distributor block 423 attached above the carousel 422 (cf. The manifold block 423 is connected to the core 137 of each dome 131 by a radially extending hose 424 which is connected to a suitable external source ^{by a connector at the remote end of the chamber "1 Cr 137"} is

The mandrels 131 are rotated by a gear 426, which is shown in Fig. 14 and for details in the [ig. 14 to Id of the US patent application 2119 7? 1 is shown

The transmission converts the constant revolving motion of the carousel 422 into an intermediate rotation of the mandrels 131. and for this purpose each mandrel 131 at the lower end of the shaft 132 is provided with a gear 426a which meshes with a gear 426 /), a vertical shaft 426r parallel to each shaft 132 is at its upper end in the lower portion of the spoke 422h of the carousel 422 using a bearing 426 and is attached at its lower end by a bearing 426d which is mounted in an arm extending from a flange 472 at the lower end of the carousel 422. stored. The shaft 426c is driven by a rack and pinion drive which is accommodated in housings 471 below the flange 472 of the carousel 422. This rack and pinion drive has a drive gear 426? on. which is keyed onto the end of the shaft 426r located below the bearing 426d and engages in a toothed rack 426 /. Each rack 426 / carries a cam roller 473 which is connected to the underside of the rack by a pin 474.

The cam roller 473 is in an upwardly facing, fixed in the top surface of a Cam plate 476 formed cam groove 475 moves, giving way to a closed path for the cam roller around the carousel 422. The cam plate 476 is more horizontal on the ends Arms 477, soft on the frame base plate 452 at regular intervals in the circumferential direction mounted around the carousel 422 using vertical supports 464, held immovable. The way for the cam rollers 473 is shaped so that a rotation of the mandrels 131 producing the sleeve-shaped blanks is made by 540 ° immediately after the front edge of the blank 118 on the Mandrel 131 has been deposited so that the blank is wrapped around the mandrel and ciie overlap Edge sections brought into one position

"'den. in which you go inside to the later to be described, have the weld-producing device. This rotation of the mandrels 131 to 540 ° occurs when the carousel 422 is looking out of position / to pick up the blank during the conveying

The drum 420 rotates into the fS-1'hr position, which is furthest down in FIG . the rotation of the dome ·. 131 is terminated, after which the blank is versehweißt 118 so that a cylindrical blank is formed hülsenförniiger 117th a slow Anstiegder guide track for the cam roller 473 rotates de Dom 131 wiedi ^"r ... iSt'i "/ UiUCK .. an aiiiieien Koiiiing right then

■ '■ to include when the mandrels 131 in one of the mandrels 141 opposite position can be rotated. The domes 131 no longer change their position when they are moved into a vertically aligned position with the form domes 141 overlying them, in which the Hiii.icn-shaped blanks passed on to the mandrels 141 will.

^r ~> the carousel 422 and the flange 472 h '.- are in their fixed mutual position, so that they rotate together. At the bottom of the flange

A worm gear 816 'is attached to 472, and it is driven by a not shown ^c ■■:' ■ ■ ow which is set in rotation on a common drive shaft together with the worm 814 of FIG. After the rack and pinion drive of the

, Domes 131 rotated it by 540 '. will the overlapping ends of the blank 118 welded. In Fig. 13 a. 13b and 28 is that in the present one Invention used Schvveißvorrichtung shown. In this device, warm air is used for heating

! ι the welding point and a cold clamping piece for pressing together use of the weld, creating a smooth, liquid-tight weld between the overlapping sections of the sleeve-shaped blank 117 is produced. Everyone is for this

: -. Mandrel 131 is provided with a welding device which is attached above the carousel 422 and, as FIG. 14 shows, is on a support ring 432 which is attached to the upper surface of the spokes 422b of the carousel 422 by vertical, säuienför-

-.i mige beam 433 and horizontal arms 434 is attached.

The individual welding devices for the mandrels 131 are located on radii of the carousel 422, which the central axis of the respective dome 131

-, cut s.

In Fig. 28 is shown on the far left how the front edge of a blank 118 from a mandrel 131 is below Using its vertical row of vacuum ports 135 is taken up; and then the

t, n mandrel 131 rotated by 540 ° by the rack drive 426 as described above. In the second position shown, in which the mandrel 131 is rotated through 180 °, a slide 435, which will be described in more detail later, is in the radial direction on the mandrel 131

», 5 to be pushed so that a roller 436 which its has the greatest extent in the vertical direction and which extends over the height of the blank 118, the Surface of the blank touches so that it is on the

Mandrel 131 is held. In the third position shown, at which the 54 () ° rotation of the dome 131 is completed, the vertically extending edges of the blank lie 118 one on top of the other A nozzle 427, which tapers to the front, then becomes hot air on the overlap-> directed towards the edges,. ·. <■> that the thermoplastic material softens. The hot air acts simultaneously on both edges of the blank, so that the Welding the blank necessary time is shortened. The hot air preferably has a tem- "' temperature in the range of 288 to 343 ° C. around the thermoplastic contemplated in the present invention To soften material.

As the healed air is directed against the overlapping knees, the rear edge of the blank 118 is directed against the hot air flow and tends to be lifted off the surface of the dome 131 so that, together with the front knees: * ijf * s Ri ^ hUp ⁰ S '^ in ^ V-förniiaf pocket ' /.mv intake of hot air is formed. At a location adjacent to the hot edge, the roller 436 remains in contact with the blank so that the trailing edge is held in the appropriate position exposed to the hot air flow.

After softening the edges of the blank 118: ■ a cold welding head 429 is pressed against the overlapping edges by cams under pressure, and the softened surfaces are combined to form a weld seam. The production of the cylindrical, sleeve-shaped blank 117 ended. At that point, the negative pressure at the openings becomes 135 switched off, so that the sleeve-shaped blank

117 can then be removed from the mandrel 131. In the fourth position shown, in which the cold Weld head 429 is pressed against blank 118 by cams, hot air is removed from the blank

118 diverted away, causing warping of the side walls is prevented. After the edges have been welded, weld head 429 and roller 436 moved away from the sleeve-shaped blank 117 n. (fifth layer shown), so that they no longer touch, and the mandrel 131 comes into a position in which the sleeve-shaped blank is ejected and over the mandrel 141 is pushed.

As shown in Figs. 13, 13a, 13b and 29. 4-, the hot air is supplied by an air regulator 427c which supplies air in an appropriate amount, e.g. 6 to 7 cfm. The -, "hot air heater has a vertical, long chamber 427 on, is which fed through a tube and through a connection 427 j air from the air regulator 427c, and which b at an upper end 427 is open so that the air can escape upwards . A suitable heater, not shown, is mounted inside the chamber 427, by means of which the air is heated as it flows through. Each air heater is mounted on a horizontal plate 427 e, soft on the upper surface of a spoke of the carousel 422 fc is 422 / fixed by bolts 427th The plate 427e is provided with an upright support 427g to which the hot air heater is attached by clamps and bolts 427A. A movable cover 428b5 is provided over an opening at the end of the chamber 427, so that after the blank 118 has been wrapped around the mandrel 131 and after it has been welded, the hot air, as in FIG. 13b, can be directed away from the side wall of the welded blank, so that warping of the same is prevented. As shown in Fig. 29, the lid 428 is moved by a vertically mounted connecting rod 428e, and the lid is biased into the open position by a spring. The lid 428, which is attached to a bracket 428 on the upper portion of the chamber 427 by a pin 428c, forms part of the connecting rod. The lid

428 thus forms a lever, and its end opposite the chamber 427 can be pivoted through a device 4i'.8e containing a slidable pin on the upper portion of a vertically mounted Connector 428r / attached. The device having the sliding pin 428t 'is biased upwards by a spring 428 /, and onto the upper end of the connecting piece 42Hf / a setting ring 428g is screwed on, see above

il; iR dip vom Dprlcpl frriuroehpnf ·öffniinp pinop * itp || t

can be. If the speed of the machine is increased, the closing times of the lid will be longer required, and the adjustment device described above allows flexible adaptation of the machine at different manufacturing speeds.

The connector 428i / is biased downward by a spring 428 / j connected to the plate 427c so that the lid 428 is urged into its open position. The lower portion of the link 428i / is pivotally connected to an operating lever 428 / by a pin 428y; and the lever 428 / k is attached pivotally by a pin 428 / to a bearing block 428, which e 427 is fixed on the upper surface of the plate. The other end of the lever 428 / carries a spherical, cam operated part 428m. which rests on an arcuate cam 428 / »which is attached to the spokes 422b of the carousel 422. The cam 428m has a lower portion which causes the lid 428 to close immediately after the blank 118 has been wrapped around the mandrel 131 so that hot air is directed against the interface between the overlapping end portions of the blank 118. After the cold weld head 429 has been brought into abutment against the overlapping ends of the blank 118, the surface of the cam 428m descends. and the lid 428 is opened.

The cold welding head 429 is mounted in the radial direction on the carousel 422, and it is in a radial through the axis of rotation of the dome 131 Level moved back and forth. The vertically extending work surface 429a at the outer end of the welding head is used to produce a vertical weld seam between the softened, overlapping Edges of blank 118. Each weld head

429 is attached to a piston rod 430 which runs through a cylinder 431. The piston rod 430 is biased inside the cylinder 431 by a spring, so that it normally the The piston rod 430 pushes inward in the radial direction, and this pulls the welding head 429 back, so that it strikes against the outwardly facing surface of an annular stop ring 479. The stop ring 479 is attached above the carousel 422 concentrically to the shaft 810 'and is held on the carousel by arms 434. Each arm 434 has a vertical, columnar shape

Section 434 «. which carries the stop ring 479 from the top surface of the carousel 422. On the stop ring 479, slots 479 ″, which run radially at intervals in the circumferential direction and are provided as access, are provided so that the piston rod 430 and the cylinder 431 can pass through the stop 479. The cylinder 431 is fixed to an annular Trägsrring 432, which is fixed on the carousel 422 by vertical columns 433 which horizontally mounted from the ends of cantilever portions 434 b of the arms 434 n; I extend upwardly as shown in Figure 14 is shown..

Figure 3 shows that each weld head 429 is mounted in an outwardly facing vertical slot in a carriage, and a vertically mounted roller 436 is mounted side by side with each weld head by a shaft 436 '. A spring 437 surrounds each shaft 436 ″ and biases the shaft outward so that a yielding device for pressing the blank 118 against the mandrel 131 is produced. Each slide 435 is moved by the movement of its piston rod 430, and the end of the piston rod 430 opposite the weld head 429 has a cam operated portion 430 'which follows a vertical surface of a side cam 430 /). The cam 4306 does not move and is mounted by a hub 430c on a fixed, vertical shaft 810c concentric with the shaft 810 '.

The cam 4306 extends in the circumferential direction of the carousel 422 over an arc which the distance covered during the welding cycle (Fig. 28). Accordingly touches a role 430 «the cam 4306, while a mandrel 131 begins to wind a blank 118 around it, so that roller 436 moves the side of the blank on the mandrel after approximately one rotation of 180 ° of the dome touches. As Fig. 13 and the second of the positions shown in Fig. 28 clearly show, the roller 436 projects outwardly beyond the end of the welding head 429, so that the welding head 429 remains away from the blank as long as it is wound up. A subsequent high section on the cam 4306 results in the welding head 429 being pressed against the overlapping, softened ends of the blank so that the weld is carried out and the side wall of the sleeve-shaped blank 117 is formed. During the latter movement, the roller 436 moves against the force of the spring 437 moved inside. Upon completion of the welding cycle, roller 430a descends from cam 4306 and the spring preload in cylinder 431 causes piston rod 430 to return inward and pull weld head 429 and roller 436 out of position back, in which they planted on the sleeve-shaped blank.

As has already been explained earlier with reference to FIG. 5, a heated Weld head 40 can be used to produce the weld of the blank. The one just described However, embodiment in which hot air heating is used is preferable. the Hot air heating allows heating of sheet-shaped blanks made of thinner material, as the hot air is directed between the overlapping end portions of the blank and thus the surfaces of the to be connected End sections can be heated very effectively. If the heated welding head 40 is used, so must the outer overlapping section and then the inner overlapping section heated before a connection can be made. The use of hot air the simultaneous heating of the adjacent sections of the blank obviously leads to it at the same time, a considerable reduction in the time required to produce the weld seam.

Conveyor device for the sleeve-shaped blanks

As has already been explained in the main features above, the welded together, sleeve-shaped blank 117 pushed onto the mandrels 141 by a stripping device, when the mandrels 141 are above the mandrels 131, d. H. in a position that corresponds to the position of the hour hand corresponds to a clock between K) and 11 o'clock, at the turning point of the main finJcicis on the left (see Fig. 11). On each mandrel 131 there is a stripping sleeve 138 and is through a U-shaped arm 460 connected to an operating rod 461, as shown in FIG. Each operating rod 461 carries a roller 462, which a continuously rising and falling cam plate 463 with a cam surface 463 follows. The cam plate 463 is circumferentially on the frame 452 of the machine along the path traversed in the movement of the mandrels through the vertical supports 464 and attached by side arms 465. The rising portion of the cam plate 463 is where the ejection cycle begins, and through it the actuating rod 461 changes to that shown in phantom in FIG Position raised so that the sleeve-shaped blank 117 is pushed down from the mandrel 131 upwards and is pushed onto the mandrel 141. The lower end of the mandrel 141 is located very close to the upper ends of the mandrels 131, and the lower ends of the mandrels 141 face a much smaller diameter than the upper ends of the mandrels 131, so that the sleeves 117 can simply be pushed on via the mandrels 141 in that the stripping sleeves 138 in perpendicular direction, creating a complicated gripping device for the sleeve-shaped Blanks is not necessary. When the stripper sleeve 138 reaches the top of its upward stroke, so will the sleeve-shaped blank 117, as best seen in FIGS. 22 and 26, through the clamping ring 143 held. Thereafter, the cam surface 463 'falls off so that the stripping sleeve 138 is in its retracted, is returned to the position shown by solid lines in Fig. 14.

Before the ejection cycle, each mandrel 131 is through the rack and pinion drive 426 rotated by 180 ° so that the vertically attached vacuum openings 135 the conveyor drum 420 are fed tangentially when the mandrel 131 and the conveyor drum 420 approach the path on which the blanks are fed; with that the mandrel 131 is for the next one Cycle has been brought back to its original position.

Station for cutting out the

disc-shaped bottoms

The sleeve-shaped blank 117 and the mandrel 141 set the movement on the arcuate one Continue at the left turning point of the main conveyor and then arrive at station 600 for transfer

of the disk-shaped bases, the disk-shaped base 171 of the cup is attached to the underside of the mandrel 141 . Preferably, the door production of the disc-shaped bottoms 171 material of the same kind as that used for the 'sleeve-shaped blanks 117 material used. However, floors can also be made of other materials, e.g. B. from other thermoplastic materials that are not oriented and do not shrink if they otherwise have properties that meet the "> requirements of the production of a liquid-tight weld according to the invention.

As shown in FIGS. 11, 15 and 16, the disk-shaped bases 171, which are to form the underside of the finished cup, are cut out in pairs from two continuous webs of thermoplastic material 501 at the same time. The lanes 501

f :: -, I _n - U _n A _n ~ »» .-: ~ i u ~ r: —J— -: ~ u - c ci „„ em ~

IUl UU3 LJl / VJl-ltlllcM ^ llCll 17 *. I || IUl. 11 3lt.ll UUI opUI ^ M .JU λ t «,

its axis of rotation running perpendicular to the direction of movement of the main conveyor 250 . The webs 501 for the flooring material are fed inwards towards one another and guided over inclined rollers 502 , which change the conveying direction in a direction perpendicular to the original direction, so that the webs of the flooring material run parallel to one another and into the station 500 for cutting out the disk-shaped ones Floors are fed into it.

Parallel and coaxial to the coils 501 "are SPU to len 501b mounted, which receive the remaining after cutting out the flooring waste material from the station 500 for cutting out the floors, as will be explained.

As shown in Fig. 16, the webs 501r > for the flooring material are drawn from right to left by supply rollers 510 and 511 (which will be described in more detail later). The rollers 510 and 511 are spaced from a cutting station 540. The webs 501 are be- w see the cutting station 540 and the rollers 510, 511 not supported and therefore sag down so that Zuführschleifen be formed. On the output side of the rollers 510, 511 and the input side of the cutting station 540 , arcuate π guides 547a and 547fc are attached and form guide surfaces with smooth transitions which guide the material webs into the cutting device. The material webs are periodically drawn through the cutting station 540 by pulling rollers 510 ' and 511' (these will also be described in greater detail later), and during the dwell times of the periodic conveyance , the material webs 501 are made into disk-shaped ones by a cutting device that moves back and forth Trays 171 separated. The v> after separating the disc-shaped soil residual waste webs are guided into the gap between the draw rolls 510 'and 511' with flat guide plates 547 c, and the waste webs then pass over more guide parts 54Td t> o and rollers 502 to the above mentioned coil 5016 on which the waste material is collected.

After their production, the disk-shaped bottoms 171 are fed to a longitudinal conveyor 560, which feeds the disk-shaped bottoms one after the other in FIG. 11 from right to left to a transfer conveyor 600 for the bottoms. The latter circulates clockwise along a rectangular path in order to bring the trays to the main conveyor, where they are then located at the bottom of the mandrels 141 .

As shown in FIGS. 16 and 19 show, has the conveying device for the webs 501 independent, lower unwinding rolls 511 for each of the paths 501, the rollers 511 each integrally formed at their ends opposite shafts 511a and 511b have, which in parallel, vertical extending frame parts 525 are supported by bearings 520 . Each lower unwinding roll 511 is associated with an independent upper unwinding roller 510 and the rollers 510 have at their ends molded, opposite shafts 510 'and 510b, which are rotatably supported by bearings 523 in the formed of levers carriers 522nd The supply rollers 51U are narrower than the rollers 511, as can be clearly seen from FIG. The beams 522 are interconnected and rotatable by shafts 526 in the frame

luv. "iiviivti % j *** j £, t-itt £ vi ι

Wll

was attached b by the waves 5l0a and 5IO and parallel to one this run. The carriers 522 act as levers and can be pivoted freely about the shafts 526 , so that the supply rollers 510 can be moved into an interior-exposing position which is remote from the rollers 511 , whereby an initial threading of the material webs 501 into the conveyor is facilitated. The movement of the carriers 522 is influenced by air cylinders 531 (see FIGS. 5 and 19) which are connected at their head end to a transverse frame part 572 and which are fastened to one of the carriers 522 by the ends of their piston rods. The upward movement of the supports 522 is limited by the movement-limiting stops 571 , which are screwed into the frame part 325 and which pass through through openings with a larger diameter made in the supports 522.

Each upper unwinding roller 516 is driven by the lower unwinding roller 511 assigned to it via a transmission 527 which has a gear 527 fastened on the shaft 511 ″ which engages with a gear 529 fastened on the shaft 511O. The gears 529 are separated from the bearings 523 by holding pieces 530 which position the bearings 523 in the bearing 522 , while the gears 527 are held on the shafts 311 by spacers 528 at a distance from the gears 570.

The amount of unwound material in the loop between the supply reels 510 and 511 and the cutting station 540 is influenced by light detectors 535 which are mounted on opposite sides of the loop. The light detectors 535 are connected by a suitable circuit, not shown, to electrical couplings 519 , which in turn is connected to a shaft 518 which is mounted in the frame of the machine below the rollers 511 parallel to them and with the shafts assigned to them in a common plane . At opposite ends of shafts 518 which are operatively coupled to the shaft 518 ', are gears 517, which engage the gears 570 which are fixed α at the outer ends of the shafts 511 to the lower unwinding rolls 511 in rotation to move when the clutches 519 are energized .

Hie shaft 518 is driven by a drive device from a main drive shaft 541 (see. FIGS. 16 and 20) , which is in the frame of the machine

parallel to the shaft 518 and at a distance from it. The main drive shaft 541 is driven by a sprocket 544 using a chain 543 which is connected to a suitable prime mover, e.g. B. the iFrimärantrieb for the main conveyor 250. On the end of the main drive shaft 541 opposite the sprocket 544, a sprocket 542 is mounted, and an endless chain 513 runs over the sprocket 542, an idle sprocket 514 and a sprocket 575 on a shaft 515. The Shaft 515 is parallel and spaced below shaft 518. A gear 512 mounted on the shaft 515 for imparting motion meshes with a gear 516 on the shaft 518 so that the shaft 518 is continuously rotated. If the material webs 501 are moved through the cutting station 540, the loops monitored by the light detectors 535 are raised until light is allowed to pass between the light detectors, whereby a rotation of the unwinding rollers 510, 511 is initiated via the electrical couplings 519 and the drive device described above, so that the loop returns to the desired size.

The material webs 501 are periodically passed through the cutting station 540 by the rollers 510 ′ and 511 ′ with reels 510 'and 511' operating in a similar manner to supply reels 510 and 511, with the exception that the initial drive mechanism is modified so that the rollers 510 'and 511' are kept in constant rotation. On the main drive shaft 541 is a gear 545 attached (see. Fig. 16, 17 and 20) and engages in a gear 546 for transmitting the movement, which is mounted on a shaft 546a, soft in the The frame of the machine is rotatable, parallel to the main drive shaft 541, at a distance from this, above the same and on one side thereof. That Intermediate gear 546 in turn drives a gear 547, which is on a shaft 548 of the lower Draw roller 511 'is attached, with shaft 548 in contrast to the shafts of the lower supply reels 511 passes through both of the lower pull rollers 511 '. The rest of the drive for the pull rollers 510 ' and 511 'is similar to that of supply reels 510 and 511 and the corresponding components are marked with' Numbers marked. The way you work is not meant to be repeated here, apart from the other Shape of the roles.

As can best be seen from FIGS. 16 and 20, the upper pull rollers 510 'are of the same width like the lower pull rollers 511 'and are mounted on separate, coaxial shafts 551. The lower pull rollers 511 'are provided with a layer on the periphery 549 of neoprene which is shaped to have a high portion 549a and a dwell portion 549b. Glued-on sections 550 made of neoprene are attached to the rollers 510 '. the sections 549a and 550 formed of neoprene are attached so as to interfere with the panels 501 at the same time touch when cutter 540 has cleared the webs. The raised conveyor sections 549a and 550 have an arcuate extent that corresponds to the diameter of the disc-shaped bottoms is matched so that every time the raised portions touch the tracks, the tracks so far be advanced so that a not yet cut section of the material web under the cutting direction.

The bases 171 are separated from the material webs 501 by the interaction of movable knives 561 and fixed punch 583 separated. the

Punch 583 shown in FIGS. 17 and 18 Whose a cylindrical, central bore 583b, and the knives 561 have a cylindrical shape on the outside and are guided in bores 583b. The punches 583 have horizontally aligned guide

Guide slots 583a on opposite sides the same and force the webs of material 501 to pass through the bore 583 b of the punch to move. The outer surface of each knife 561 slidably slides against the inner surface

π surface of the bore 583b, and the outer, The upward-facing edge of the knife 561 works with the inner, downward-facing edge of the Hole punch 583 above the slots 583 a together, so that a scissors effect is exerted on the webs of material 501 when the knife 561 after are moved above, whereby the disc-shaped bottoms 561 are punched out of the material webs.

The punches 583 are fixed on a horizontal

: ϊ extending frame part 584 fastened by bolts 583c (see. Fig. 17), and the frame part 584 is fixed attached to the frame part 585 extending in the vertical direction by bolts 584a.

The cutting knives 561 are, as Fig. 16 shows,

in by a horizontally mounted bridge part 561a moved in the vertical direction, which moves through guide rods 587 only in the vertical direction can be, wherein the guide rods 587 extend from the frame part 584 down and in on

ji sleeves 588 attached to bridge portion 561a are slidably attached. Each knife 561 is of a supported upright rod 5616 which extends perpendicular to the bridge portion 561a. The upright Rods 561b have a lower, outer thread the provided end on, which is down over the lower surface of the bridge part 561a protrudes, and is on the lower end of each rod 561b a ring 561c provided with an external thread is screwed on, through which a ring points downwards j send shoulder 561c / on each rod pressed against the upper surface of the bridge part 561a. The knives 561 have, at their upper end a bore 561 e, and at its lower end a counterbore 561 / on which is at the upper over a

-, o ren end of the rods 561b provided section with a reduced diameter, so that the knife over an outwardly facing shoulder 561g sit on the rods 561b. In the center of the rods 561b is a hollow channel along their entire length

γ-, 561 h provided, in which a lifting rod to be described later is received. The upper end of each channel 561 / i is provided with an internal thread through which a clamping screw 561 / provided with an external thread is opened.

bo is taken, which at its upper end has a has an outwardly extending flange which rests against the end of the bore 561 e in the knife, so that the knives 561 are forcibly pressed against the shoulders 561g.

h5 The bridge part 561a is moved back and forth by connecting pieces 580, which are fork-shaped have upper ends 580a pivotally connected to downward facing eyes 580b,

24 20 i63

the latter being connected to the surface of the bridge part 561a on opposite sides are. The lower end of each link 580 is in the form of a split hub 581 which is a bearing for one on the main drive shaft 541 attached eccentric forms. The stroke of the eccentric is sufficient for the cutting knife to release the material webs from a location below the level of the slots 583 β in the punch Bring position in a position above the same, as Fig. 18 shows.

A lifting device is provided at the cutting station 540 in order to feed the cut-out bottoms to a longitudinal conveyor 560. The lifting device has connecting rods 562a which are mounted in channels 561 / t of the rods 561b so that they can be reciprocated in the vertical direction. Circular Anhebscheiben 562 are attached to the upper "ends of the connecting rods 562α by screwdrivers. 5GId, soft in downwardly facing openings are screwed into the connecting rods 562a. The outer diameter of Anhebscheiben 562 is less than the inner diameter of the bores 561E in the knives, so that the lifting disks can be accommodated in the bores 561e while the material webs are being cut. The lower ends of the actuating rods 562a are connected to a bracket 5626 which in turn is connected to an upside-down U-shaped fastening part 562c with the feet of the U slide around the main drive shaft 541. A roller 563 extends laterally outward from the fastening part 562c and contacts an eccentric cam 564 wedged onto the main drive shaft 541. The cam 564 moves the lifting disks against the force of a return spring 536, which is coaxial on a vertical Guide rod 586 is appropriate to the top. The spring 536 acts between the frame part 584 and a spring seat formed on the upper support 562b, so that the lifting washers 562 are pressed downwards and the roller 563 is brought into contact with the cam 564.

In an advantageous embodiment, the eccentric cam 564 has a simple one, over 110 ° running, harmonic elevation, so that the lifting disks 562 moved upwards in a manner coordinated with the upward movement of the knife 561 will. The stroke by the cam 564 is of course much larger than that of the eccentric for the knives, so that after the disc-shaped bottoms have been punched out of the material webs and after they have been lifted slightly by the knives 561, the lifting disks 562 are moved upwards so that the disc-shaped bottoms 171 over the upper surface the punch 583 can be raised into a position in which they are passed on to the longitudinal conveyor 560 will. In the advantageous embodiment just described, the cam has an angle greater than 105 ° running, simple, harmonic, sloping section, which is the rising section surrounds, so that the lifting washers 562 are withdrawn into the bores 561 e in the knives, when the knives are lowered in the direction of the position releasing the workpiece below the level of the Malerialbahnen. The cam 564 has a over 145 ° extending dwell section, through which the lifting washers below the level of the

Sheets of material are held and moved while the lift washers 562 remain in place the eccentric for the knives move the upper edge of the knives into the position releasing the material webs below (at this time the webs of material 501 are advanced by rollers 510 'and 511') and then up to separate part of the web again.

The lifting disks 562 can only be moved in the vertical direction, since there is a sliding guide between the connecting rods 562a and the bearing sleeves 561 / and also provided with a flange is provided for the guide rod 586, which is shown in a guide hole 584c provided in the plate 584 is moved upward.

In order to keep the material webs 501 properly tensioned when they are conveyed and the disk-shaped bases 171 are punched out of them, two tensioning devices 566 which are prestressed by springs are provided. The one for every material lane 501 provided jigs 566 are biased so that they are counterclockwise Rotate against the fabric webs 501 when they are guided over the guide part 547b (cf. Fig. 18). To facilitate shearing, the top edge of the knives 561 can be sloped downward from diametrically opposed high points so that there is an increasing shearing as the knives are moved through the webs of material.

First conveyor for the disc-shaped floors

The longitudinal conveyor 560, which the disc-shaped floors one behind the other and parallel to the main conveyor, the transfer conveyor 600 for the floors is described with reference to FIGS. 15 and 18. According to this, the longitudinal conveyor 560 has parallel rails 565 attached at a distance, which have a substantially rectangular cross section and are provided with recesses 565a on their inner surfaces facing one another. The front Edges of the rails 565 form an entrance opening with a width slightly less than that Diameter of the floors 171, but larger than the diameter of the lifting disks 562. As the floors 171 are made of flexible, thermoplastic material, the outer edges of the floors give way when lift washers 562 move the shelves upward so that the shelves can be positioned in recesses 565a.

The rails 565 are beneath parallel, coplanar, rectangular plates 578 supported by bolts 578a and spacers 578b, and the plates 578 are suspended below one fixed frame part 579c attached by bolts 579a, which by transverse brackets 579 and Pass spacers 579b through. A third, central, rectangular plate 569 is in the same plane between plates 578 by bolts 589 and spacers 589a are attached, and the edges of panels S79 and 578 form guides for roles, as will be explained later.

To ensure that the bottoms 171 are not over the recesses 565a are lifted out, stop parts 567 are provided directly above and in alignment with the axis of the lifting disks 562, and the stop parts 567 can be in a bore of a guide sleeve attached to the plate 569 567b can be freely moved upwards. At the upper end

a weight 537 is attached to each stop member by means of which it is returned to its lower position will. When the lifting disks 562 are withdrawn again, the disk-shaped bottoms 171 become carried by the lower flange of the recesses 565a; and the floors 171 are longitudinally along the rails 565, in Fig. 15 from right to left, moved to the transfer conveyor 600 for the disc-shaped floors. The longitudinal conveyor 560 has a pair of endless chains 576, the rollers of which along the edge of the plates 569 serving as guides and 578 are moved. Links 577a extend outward from the chains 576 and carry downwardly extending pins 577, which are attached side by side at a distance, which is smaller than the diameter of the disc-shaped bottoms 171 when the pins 577 the area between cross the recesses 565 a. The chains

576 wrestle around free sprockets 594 and 595 at the right end of the plates 578 (see Fig. 15), and after the bottoms 171 in the recesses 565 have been positioned and the lift washers 562 have been retracted contact the pins

577 the floors at their downstream section and promote them along the recesses 565 a to the the end of the longitudinal conveyor 560 forming the outlet.

The chains 576 are driven by chain wheels 591 and 595 'at the left end of the plates 578, as shown in FIG also drives the ÜLt infeed conveyor 600. The chain 590 is tensioned by a chain wheel 590b that is attached to the end of an adjustable A-mes 590a. A gearwheel 593a r> is attached to a shaft 592 and drives a gearwheel 59b , which is attached coaxially to the sprocket 595 ', so that the chains 576 are moved in a timed manner.

Transfer conveyor for the disc-shaped floors

The transfer conveyor 600 is described with reference to FIGS. 15 and 21. He has two in vertical Directional spaced endless chains 603a and 603b, which are connected by a pair of in 4-. vertical direction spaced, not shown, below the sprocket 602 on the Shaft 602ο attached sprockets driven and by pairs of vertically spaced, following chains -> n wheels 609, 611, 612 are guided so that they revolve on a rectangular path. One side of the rectangular path of the transfer conveyor 600 runs in the same direction as a section (the Outlet end) of the longitudinal conveyor 560, while the v, opposite side of the path of the transfer conveyor 600 runs in the same direction as the main conveyor 250.

A plurality of receiving heads 601 are carried by the chains 603a and 603b, through which disk-shaped bottoms are picked up by the longitudinal conveyor 560, the disk-shaped bottoms are fed to the main conveyor 250 and are successively passed on to the bottoms of the mandrels 141. The recording heads 601 are _h -> held on the upper end of a vertically extending support rod 605, and the support rods 605 are slidably have in a recess provided in a carrier 604, vertical bore In Bracht, the carrier 604 inward facing lugs 604 'and 604b in a A distance corresponding to the distance between the chains 603a and 603b are provided, and rollers (not shown) are mounted in the extensions 604a and 604b and are driven by the chains 603a and 6036, respectively.

The girders 604 are made from a fixed, horizontally extending frame part 615 by means of guide parts 616 supported, which are fastened to the frame part 615 by bolts and to the outside via the latter Run out of edges. The guide parts 616 are provided with an upwardly pointing guide track 617 and an outwardly pointing guide track 616, which rollers 619 or inwardly extending rollers 620 which are attached to the carriers 604.

The structure of the pick-up heads 601 can best be seen in FIGS. The recording heads 601 have a horizontally running surface 601c which can support a disk-shaped base 171. The surface 501c has arcuate portions at the front and rear edges which, as FIG. 23 shows, are connected by substantially straight lateral edges. A flange 601a runs upwards from the front, arcuate edge, while a further flange 601b runs upwards from the rear edge. The distance between the flanges 601a and 601b, which is to be compared to a circular diameter, is somewhat larger than the diameter of the disk-shaped bottoms 171, which is shown in broken lines in FIG. The trailing edge of the recording heads 601, including the flange 601b is shorter, so that access openings 601 d formed on the rear edge of the recording head, can be accommodated in which pins 577 as the leading edge of the recording head and the flange 601a. As will be described, the flanges 601a and 601b work with the surface. 601c together, so that together they form a substantially cup-shaped receptacle for holding the disc-shaped bases 171. The recording heads 601 have a central vertically extending bore 601 e, upper end of the support rod 605 is slid with an attached in this bushing, which exhibiting a reduced diameter. A retaining ring 605a is attached to the upwardly facing shoulder of the support rod 605 at the lower end of the reduced diameter section; and a spring 608 extends between the retaining ring 605a and a downwardly facing shoulder 601 / of each pickup head by which the pickup head is pushed upwards. At the upper end of each support rod 605, an enlarged flange 605 b is provided, by means of which the receiving heads 601 are held on the support rods 605. A cam track 606 is attached to the machine frame in the area in which the longitudinal conveyor 560 and the transfer conveyor 600 run in the same direction. The cam track 606 has a sloping portion that is aligned with the bottoms 171 and pick-up heads 601 as they pass through the area where the two conveyors are in the same direction. At its bottom section, the support rod 605 is provided with a roller 607 which engages in the cam track 606; and through

the rising portion of the cam track, the pickup head 601 is vertically upward moves so that it picks up the bottom 171, the pickup head being driven by the cam track 606 in FIG its lower layer is returned after it has taken over the bottom 171.

The chains 603a and 603ö move the raised pick-up heads 601 vertically into alignment under the disc-shaped floors 171, and when a single floor 171 approaches the end of the guide rails S6S, the pins 577 push the floors off the guide rails 565 and the floors fall so that the leading edge of a disc-shaped; The bottom first touches the front flange 601a of the pick-up head 601 and then the entire bottom falls so that the rear end of the disc-shaped bottom lies at the flange 601a. When the bottoms are transferred to the receiving heads 601, they remain under the influence of the pins 577, which are inserted into the recesses 6QId at the transfer point. The rear section 601fc of the pick-up head is provided with recesses in which the pins 577 find space when a base 171 is passed on from the guide rails 56 to the pick-up head 601 during the vertically aligned movement.

After the bottom 171 has been taken up in the recess of the take-up head 601, the transfer conveyor moves 600 for the floors the pick-up heads 601 in the area in which the transfer conveyor 600 and the main conveyor 250 run in the same direction, and brings the pick-up heads in a Laige in which they are vertically aligned with the mandrels 141 of the main conveyor 250. In the area where the transfer conveyor 600 and the main conveyor 250 run in the same direction is shown on the frame of the Machine attached a cam 613, and this has an aligned with the mandrels 141, rising Section on, over the area where the mandrels run through the area where both Conveyors run in the same direction. A roller 607 runs on it within the cam 613 soft lifted a pick-up head carrying a floor into a position useful for transferring the floor in which the bottom of a mandrel 141 is touched, as shown in FIG. The recording head 601 and the mandrel 141 keep moving together as long as they touch, and the disk-shaped one Bottom 171 is passed to the bottom of the mandrel 141 in that on the ground a negative pressure is exerted on the mandrel. The spring 6G8 and the movement by the cam 613 together ensure a close bringing together of the receiving head 601 and the forming mandrel 141, while the soil is passed.

Above the sections in which the main conveyor 250 and the transfer conveyor 600 run in the same direction, a pair of vertically spaced tubular vacuum containers 210 and 220 are mounted on the frame of the machine, as shown in FIG. The vacuum vessel 220 extends from the sections in which the two conveyors run in the same direction, essentially through the entire tunnel 700 to be described for shrinking, while the vacuum vessel 210 runs only partially through the tunnel for shrinking. The vacuum containers 210 around ¹ 220 are connected to a suitable vacuum source, not shown, and connected by longitudinal slots 211 and 221 to connecting pieces 212 and 222, respectively, which protrude outwardly beyond the supports 252 of the mandrels. The fittings 212 and 222 are connected to the vertical channels 145 and 146, respectively, which extend the entire length of the spindle-shaped portion 147 of the carrier 252, as shown in FIGS. A side opening 146a forms a connection

in between the channel 146 and the space which is located between the spindle 147 and the curved side wall at the lower end of the mandrel 141. In the side wall of the mandrel 141 fet a plurality of channels 141 b are provided, through which a negative pressure is exerted on the sleeve-shaped blank 117 in the tunnel for shrinking, as will be explained later.

An insert 142 is located in a downwardly open recess 143 in the lower end of the mandrel 141

2fi attached. The insert 142 has a channel 142 on, which a connection between the channel 145 and a plurality of fine, vertical channels 144 produces, which are attached in the circumferential direction at a distance around the insert on its wall.

2 ~. The insert 142 has a further channel 142h which establishes a connection between the channel 146 and a plurality of spaced, vertical channels 253 in the upwardly curved central section of the insert 142. The Ka-

jii channels 253 are slightly larger than channels 144, whereby the shaping of the bottom profile of the cup is supported. The one exercised through channels 144 Underpressure forms a retaining force acting on the edges of the disc-shaped base 171 and

ü holds the soil forcibly on the mandrel 141 when the receiving head 601 by the cam 613 is pushed down.

Shrink tunnel

Immediately after receiving the disc-shaped base 171, the mandrels 141 are passed through a tunnel or oven promoted to shrink, in which the thermoplastic material is brought to the Shrink shape of the surface of the mandrel 141. As shown in Figs is, the tunnel 700 has six longitudinal infrared heaters for shrinking, which along the inside (701a and 702a), along the outside (701ft and 702fc) and below (703) the

> <> Wiges of the main conveyor 250 are attached.

The heaters 701a and 701b extend on the first half of the tunnel for shrinking parallel to that traversed by the main conveyor 250 path, wherein the forming mandrel 141 parallel to each other verlau-

- ,; Fe ;; de surfaces of the heater are opposite, so that the substantially cylindrical, sleeve-shaped blank 117 is heated uniformly and the sleeve-shaped blanks 117 are initially heated to shrink as they enter the tunnel.

μ When the sleeve-like blank 117 is heated by the heaters 701a and 701b, the lower portion of the sleeve-like blank is moved by each of the heater inwardly away at the smaller diameter curved end of the Formdor-

tones 141 too, so that the upper portion of the sleeve-shaped Blank would be heated more than the lower section. As has already been stated, the Angle of attack of the sleeve-shaped blank between

5 and 7 ° at its upper end and grows to a wedge angle of at least the order of magnitude 15 ° at its bottom. About this difference in distance The heaters are the one to counter and bring about a substantially uniform heating 702 'and 702 so that they occupy a position which is essentially parallel to the central one Curvature of the mandrel 141 is so that the distance between the heaters and the sleeve-shaped Blank 117 along the / wide half of the tunnel / around Shrinkage is essentially the same.

In one embodiment of a tunnel / around shrinkage, good results are by inclining the heaters 702 ″ and 702 / ″ at an angle of ⁷ ′. compared to animal vertical Γ.Ιχ-ne has been obtained. With this ·. Niisführiingsform the heating elements each have ¹ - of the attached inclined heater located a perpendicular distance the stacking shoulder forming profile on the forming mandrel 141, which is substantially the vertical distance between the upstream Hei / he met by way of the main conveyor 250th In this embodiment, the upstream heaters for the floors were placed about 4.5 cm lower than the downstream heaters for the floors, so that in the first hall of the funnel for shrinking the lower section of the sleeve-shaped blank does not extend: _.iu is heated to cause premature curling or aging of the liner-shaped blank.

The heaters are mounted on an elevating device 740 which only one of which is shown by two pneumatically operated cylinder 794. in FIG. M). raises the heater from a lowered level to a raised operating position around the main conveyor 250 path. The heaters can thus be adjusted in order to enable the maintenance of the mandrels located in the furnace / around the shrinkage and to start up and shut down the machine.

The heaters are adjustably attached by two independent but interconnected fasteners 750. Each fastening device 750 has two L-shaped arms 751. which by bolts 753 reverse the ends of each of the side fleizers with corresponding sets. L-shaped adapter arms 752 connect. The side heaters 701 a. 701b. 702 «and 702ftsinc! on the respective L-shaped arms 751 z. B. attached by welding. The adapter arms 752 have adjustment slots extending in a horizontal direction. through which the bolts 53/53 pass so that each of the side heaters can be moved independently inwardly or outwardly of the path of the mandrels 141. Between the abutting, horizontal surfaces of the arms 751 and the adapter arms 752, spacers 753a, for. B. wedges are placed so that the desired inclination of the side heaters 702a and 702fe is achieved.

Each vertical adjustment arm 752 has a side plate 752a which abuts a mounting plate 754. Parallel, vertically extending slots 752b in the plates 752a are each made by a bolt 755 passes through, so that the adjusting arms 752 can be displaced in the vertical direction to the fastening plates 754 be guided. The adjustment arms 752 are adjusted by vertically extending adjustment rods 756 moved, the upper end of which rests against the lower surface of blocks 757 and carries them, which on lower portion of the side panels 752a are attached. The middle section of each adjustment rod 756 passes through a block 758 mounted on the vertical surface of plate 754 unscrews so that when turning each adjustment rod 756 the height of the heater end above it is adjusted will.

One that runs lengthways. The U-shaped channel 760 is located in the middle between the adapter screens 752 of each pair of sciiIk her heaters, and each channel 760 carries a bottom heater 703. The bottom heater 703 is located in the middle arms running above dci Kmiicv 7Ml. and here / u L-shaped adjustment arms 761 are attached to the ends of the channels 760 by bolts 762 which extend vertically. in the vertical section of the adjustment arm 761 ang; · '. · ■. .: Cross each slit. The base of each channel 760 is fixed at each location by bolts 770 on fastening elements 771

- '"hefesti:' '. The fastening parts771 are themselves fixed on a reverse. U-shaped channel 772 is attached, which looks the full length of the tunnel / '■ · ■■! Shrink extends so that the fasteners 750 can be moved together, as will be described later. For independent adjustment ■! . The height of the Hotienheater 703 are vertu al. Poles 775 provided. These are diirehscrewed through fasteners 771 and run through Through holes in the channels 772 and 760. so that they can be lifted up against the fiinstellblivken 776 the bottom surface of the adjustment arm 761, making it possible to adjust the ends of the bottom heater set independently of each other and independently of the Scitcnheizern.

The fastening devices 750 are between parallel, vertically extending frame uprights 780 by roller devices 781 mounted on levers which are on each side of the opposite Ends of the channel 772 are provided,

; ■■ bring and are due to these. Any roller device includes a pivot block 782. the z. B. by welding firmly to the forming the bottom surface Track of the gutter 772 is attached. and it has a lever 783. which can be pivoted by a

: Pin 784 attached to one of pivot blocks 782 is. Each lever 783 carries a side roller 786, which is attached by one above each lever Compression spring 785 which contacts the lower surface of the channel 772's path which forms the bottom.

ν pressed against one of the stands 780 wira. Every the compression springs is adjustable by a bolt 785a so that the torque and the with the concern a roller to a stand 780 connected reaction force can be adjusted. The stand

r> of the frame are supported by longitudinal U-profiles 787 below and above, and the one below lying flanges of the lower U-profiles are attached to floor bearings 788.

The gutter 772 is at both ends of the tunnel

bo nels for shrinking by means of an air cylinder operated linkage 799 carried. Each linkage 799 has a bearing 790 attached to the lower surface of the track forming the bottom of the trough 772. a first pair parallel connecting parts 791 which are pivotably connected at one end to the bearing 790, a second pair of parallel links 792 which are pivotable over the ends of the links

791 are attached, and a connecting piece 793 to the floor, which is attached to the floor bracket 788 and is pivotally connected to the other end of the second connecting parts 792. Each connecting rod is moved by a compressed air operated cylinder 794, which - which cannot be seen in the drawing - is attached pivotably at a certain angle to the floor bearing 788. The piston rod 795 of each cylinder is of the connecting parts 791 and 792 ^{medium-l ()} each mounted on the inner side connecting joints pivotally mounted to the linkage so that the heater dashed lines in moving out of the piston rod 795 from the cylinder, the connecting rod assembly in the in Fig. 30 shown working position. i '>

The tunnel 700 for shrinking is provided with devices by which the mandrels 141 are rotated, so that an even distribution of the heating is ensured. So that the Foiindornes is rotated through the tunnel for shrinking the forming mandrel 147 about its spindle in conveyance ⁿ valley extending rail 711 in the recess 251 on the forming mandrel 141, - for this purpose ι 'iie edge running de-forming portion of a horizon-. The rail 711 is preferably made of a resilient ^2R > material so that there is permanent contact with the recess 251. Using stud bolts 712 and nuts 713, the rail Tt is attached hanging down from the frame part 229 via inverted, L-shaped arms 722. It is preferably the same length as the tunnel for shrinking.

During the shrinkage of the sleeve-shaped blank 117 in the tunnel, the force exerted along the curved surface of the mandrel works pressure coincides with the shrinkage due to the action of heat, whereby the sleeve-shaped blank 117 is made to lie tightly against the outer, curved surface of the mandrel. When shrinking the sleeve Migen blank moves its lower section inward, so that it runs on the circumference Edge of the disc-shaped bottom 171 overlaps, while the middle section of the disc-shaped Bottom is pulled up as a result of the interaction of the heat and the negative pressure exerted by the channels 253.

Optionally, the tunnel can also be provided with two sets of heaters for shrinking, which on one side of the main conveyor 250 path and so are attached below the same. 24 shows a tunnel 700 'for shrinking with longitudinally extending infrared heaters 701' and 702 'which are positioned along one side and below the path of the Main conveyor 250 are attached. Reflector plates 703 'located opposite the infrared heater 701' and reflector plates 704 'located above the infrared heater 701' serve for the purpose of the heaters to hold back and throw back the emitted infrared rays for heating. The reflector plates 704 '& o are attached to a frame part 720 'by isolators 70S' which are attached to arms 719 'of the frame Bolts 706 'are attached. The reflector plates 703 'are attached to vertical supports 707' by insulators 708 ' and bolt 709 'attached. The devices by which the mandrel 141 is set in rotation and through which negative pressure is supplied to this are the same as those shown in Fig. 30, and are provided with corresponding reference symbols.

Station for shaping the floors

After the sleeve-shaped blank 117 has shrunk to the shape of the mandrel 141, the mandrels are conveyed to the station 800 for forming the bases at the right turning point of the main conveyor 250, where the disc-shaped base 171 and the sleeve-shaped blank 117 are connected to one another, si that a liquid-tight seal is formed.

As shown in FIGS. 25 and 25a, the connection between the overlapping edge portion 1176 of the tubular blank and the Circumferential edge of the disc-shaped bottom 171 brought about by a heated mold 801. The molds 801 are on a horizontal carousel 802 attached in the vertical direction to this displaceable, the carousel by a wedge 811 with the shaft 810 is connected so that it rotates therewith. For this purpose, a plurality of vertical support rods 803 for the molds 801 in sleeves 821, which are attached in the circumferential direction at intervals around the carousel 802, in the vertical direction slidably attached. The sleeves 821 are attached to a common diameter and they align with the mandrels 141 in the vertical direction when the mandrels enter the molding station enter the floors.

A cam track 804 is attached to a frame part 822, and to the lower end of the support rod 803 a cam 804a is attached and contacts the cam track 804. The cam track 804 has a rising portion through which the heated molds 801 are moved upwards so that they touch the inwardly extending side wall portions 117b when the mandrel 141 passes through the turning point of the main conveyor on the right.

Each shape 801 is supported by a spring 820, which is between an annular, on the support rod 803 attached spring retainer ring 825 and a spring seat in the lower portion of the mold runs, according to spring loaded at the top. A guide pin 826 is attached to and extends on the spring retainer ring 825 sliding in a downwardly open recess 827 in the mold, which helps guide the mold 801 so that it only moves in the vertical direction can move with respect to the spring retainer ring 825.

The mold 801 has a heating element 828 and a mold head 829 attached to the top surface of the heating element 828 is attached. The heating element 828 is provided with a central bore that slides over the top of the Support rod 803 is attached and which is held thereon by an adjusting nut 830 which is connected to the upper end of the support rod 803.

The mold head 829 has an outer, annular ring part 831 with a plurality of pairs diametrically opposing, radially extending channels 832 (see. Fig. 25 a). In the middle of the forming head 829 there is a molded part 833. This is overhung and with respect to the ring part 831 by springs 834, which run in the recesses 832, centered. The springs 834 act between adjusting screws 835, which are screwed into the outer ends of the recesses 832, and the outer one

Side wall of the molded part 833, so that the molded part is resiliently held in a centered position. the inner ends of springs 834 are secured by flanges 836 and 837 on opposite sides of the Molding 833 held.

. The molded part 833 has an upward-facing,

substantially truncated cone-shaped recess 838, which has a shape that of the desired ;> The final shape of the lower section of the cup is

i \ speaks. At the bottom of recess 838 is one

A plurality of raised, annular ribs 839 are provided through which corresponding, annular Rings are created in the bottom portion of the finished container.

The molded part 833 is heated by conduction via the heating element 828, with the one shown Embodiment the latter is an electrical heating element. which by wires 818. which are extend through the center of the shaft 810, and is supplied by sliding contacts 819 with power. As a result the heat applied by the mold 801 and the pressure exerted by it is between the disk-shaped Bottom 171 and the inwardly extending lower portion 1176 of the sleeve-shaped Blank made a liquid-tight connection.

When the mandrels 141 and the molds 801 approach the end of the turning station on the right, so the mold 801 is moved downwards by the correspondingly shaped cam track 804, so that it is the Forming mandrel 141 no longer touches, and the forming mandrels run on to station 900 for forming the edge.

Station for molding the edge

: After the sleeve-shaped blanks 117 through

have passed through the station for shaping the soil, the production is finished, apart from the , / i Formation of the curled, upper edge. The details a specific device for applying, ', the edge, which in the station for applying the

>, 'Edge is used for the present er-

! finding is not essential, and several dem

vj methods known to those skilled in the art are used for this purpose

% become. Such a procedure is described below in

> y described the main features.

- ■ :: As Fig. 11 shows, is in the station for attachment

Provided $ edge of a separate conveyor. the

ν device for ejecting the not yet with a

: \ Rimmed cup from main conveyor 250

and for placing the cups on the conveyor the v .. _s station for attaching the rim is best off

FIGS. 26 and 27 can be seen. As shown, is near the path taken by the main conveyor an ejector 910 is attached for the cups. It has an ejection part 911, which ■> is movable below, so that it is the sleeve-shaped Flange 277 touches in order to strip the not yet provided with a rim cup from the mandrel 141. The ejection part 911 is in the form of a roller which is at an outer, eccentric end

ίο 912 a shaft 913 is attached, which is in a bearing block 914 is rotatably mounted. A 9 () ° right-angle gearbox 915 is suspended by an arm 916 on the Frame of the machine and, when a sprocket 917 rotates, shifts the shaft 913 in rotation.

Ii hung. The chain wheel 917 is supported by a chain 918 and a drive sprocket 919 which is connected to the drive of the conveyor of the station to the Attaching the border is synchronized.

The conveyor of the station for attaching the border

2i) des has a plurality of spaced apart Cup holders 920 on (Fig. 27), which are moved forward so that they are in the vertical direction with the Forming mandrels 141 are aligned when shaft 913 rotates roller 911 to meet top surface 277a

- '■ "> of the sleeve-shaped flange 277. The sleeve-shaped Flange 277 is moved downward and its lower surface 277b lowers the clamping ring 143 on a reduced diameter portion of the mandrel, whereby the

«Ι blank is released. Touches surface 277b then the top edge of the cup sidewall forcibly stripping the container from the mandrel 141. Through the channels 145,146, 141b, 144 and 253 can be pressurized

)>, causing the container to become detached from the Shaping mandrel, if desired, is supported.

The cup holders 920 are conveyed and transported at the same longitudinal speed as the mandrels 141 are attached in the vertical direction in close proximity to the Βοίο dens of the mandrels, so that the stripped Beakers fall into the jar holder 920 pointing downwards. The cup holders 920 have a frustoconical interior through which the top edge of the cup is in a place to attach the rim is held in a convenient position. The rim application station conveyor then guides the cup holders 920 past an edge generating mold 922, and between the edge generating mold Form 922 and the cup holder 920 is carried out a relative movement so that on the upper edge a rolled edge is formed on the side wall of the cup.

In addition 24 sheets of drawings

Claims (9)

Claims; l _t Device for producing a stackable conical container, the side wall of which is formed from a foil blank made of thermoplastic material, consisting of at least one sleeve mandrel on which a foil blank can be placed, a welding device for the liquid-tight connection of the ends of the foil blank to form a sleeve, a container mandrel, onto which the sleeve can be transferred, and from a device for producing a base on the container, characterized in that a plurality of cylindrical sleeve-forming mandrels is (131) are arranged at regular intervals on the circumference of a wheel (422), in the area of which a feed station for Rectangular shrinkable film blanks are provided so that several container shape domes (141) are arranged at regular intervals on an endless conveyor (250), the container shape mandrels and the sleeve shape mandrels aligned axially perpendicularly in the area of the wheel and the sleeves (117) vo n means (138, 460, 461) which can be moved perpendicularly with respect to the wheel can be transferred to the container mold, that a heating device (700) is provided in which the sleeves can be heated and shrunk onto the container mold, and that jo then a molding station (800) with a bottom molding seal (801) is provided for reshaping the sleeve section located in the bottom area. 2. Device according to Anspn ch 1, characterized in that that the endless conveyor (250) wraps around two reversing wheels (266, 802), one of which is vertically aligned with the Sleeve-shaped mandrels carrying wheel (422) is aligned and that in the area of the conveyor (250) in the conveying direction behind the first wheel (422) a heating tunnel (700) and in the conveying direction in front of the first wheel, a heating device (300) for heating the container-forming mandrels (141) is arranged, and that in the area of the second reversing wheel (266) of the conveyor second wheel (802) is arranged on the bottom mold stamp at equal intervals on the circumference (801) are attached, which are also aligned vertically one above the other with the container mandrels are aligned. 3. Apparatus according to claim 1 or 2, characterized in that between the first Wheel (422) and the heating tunnel (700) for shrinking the sleeve on a conveyor device (600) is arranged in the region of the container forming mandrels and that a punch (500) is provided is, from the disc-shaped container bottom (171) are cut out of a plastic film, whereupon the container bottom by means of the conveying unit t, o direction (600) into the lower open end of the sleeves located on the container forming mandrels (141) are insertable. 4. Apparatus according to claim 3, characterized in that the punch (500) consists of several ^ stationary cut forms (583), each of which has a cylindrical bore (583b) in which a coaxially arranged punch (561) is received longitudinally displaceably and that horizontal slots (583 a) for receiving a film web (501) are provided in the preform punch and that in the cutting punch (561) a transfer link coaxially and displaceably (562) is arranged, the sieve in the axial direction moved in relation to the cutting punch and the container bottoms on the conveyor (600) transmits. 5. Device according to one of claims 1 to 4, characterized in that each container mandrel (141) has a cylindrical upper section (147 a) and a lower section, whose diameter corresponds to the internal shape of the container that on the upper section vertically a sleeve (277) is slidably arranged, the lower end of which with a shoulder (2776) is provided, on which a clip (143) is applied, which is immediately above the edge the sleeve (117) is arranged, the sleeve (277) between a retracted position is displaceable above the lower portion of the container-forming mandrel and a position in which it engages over part of the lower portion of the container mandrel, creating a container can be stripped off, and that a vertically extending spindle on the conveyor (250) (147) is attached, on which the container-forming mandrel is rotatably mounted, wherein the upper portion of the container-forming mandrel can be brought into engagement with a stationary drive element (3 © 8, 711) which is arranged in the area of the heating station (300,700). 6. Device according to one of claims 1 to 5, characterized in that the bottom die (801) is elastically resilient at one in vertically displaceable support rod (803) are arranged and an upward pointing, heated head (829) with tapered, the lower portion of the container outer corresponding side walls (838) and a floor segment, the annular outer portion (839) corresponds to the annular edge portion of the container bottom. 7. Apparatus according to claim 6, characterized in that the heated head (829) with a annular outer support ring (831) is provided in which a forming die (833) with conical side walls by means of centering springs (834) is floating. 8. Apparatus according to claim 7, characterized in that the springs are paired with one another opposite between the forming die (833) and the outer support ring (831) in the same Distances are arranged on the circumference of the heated head. 9. Device according to one of claims 1 to 8, characterized in that the welding device (400) for connecting the ends of the rectangular foil blank (118) an in Longitudinal direction of the sleeve-forming mandrel (131) er = stretching hot air nozzle (427) and a rail (429) which is used to close the through the hot air heated ends is driven to move laterally.