DE2321457A1 - METHOD AND MACHINE FOR MANUFACTURING LONGITUDINAL SHELLS FROM PLASTIC FILM, E.G. FOR WALLPAPER ROLLS - Google Patents

Description

Munich, the '- * £ fe /

Munich fifi /
WJ - .. m » _y .r, traM 4f 232 1 Λ5 7

Frederick Douglas Clavell Bate in Nelson, Lancashire, UK

Method and machine for producing τοη elongated casings Plastic film, e.g. for wallpaper rolls

The invention relates to a method and a machine for producing elongated covers from plastic film, e.g. "for wallpaper * rolls and similar objects that are usually provided with a firmly shrunk-on film cover «, in general Sense is the invention with the production of a to the Ends open, tubular wrapping envelope dealt into the one or several objects to be wrapped are to be introduced such Einwiokelhüllen made of heat-shrinkable film , and the invention is therefore also intended for the manufacture of such wrapping envelopes, but it can also be used for the manufacture of Foil packs are used that do not have any shrink treatment require"

According to a known method for introducing objects in a tubular casing made of plastic film before a sohrump treatment, two film webs are used, which are attached to their adjacent ends are welded so that between two

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If he delivers 3 parts, usually supply rolls, a vertical double strelfe is created. The object to be wrapped, possibly also a plurality of items lying together in a packing sleeve, is then inserted in the transverse direction at right angles to the conveying direction of the pile webs into the resulting hell, with the pile webs τοη removed from the supply rolls. The wrapping cover is then first wrapped over the front edge of the object to be wrapped, then over its upper and then over its lower part. The two foils are then brought together at the rear of the object to be wrapped, cut along a transverse line and simultaneously on both sides of the cutting line kept silent. The object to be wrapped is then in a tubular pollen sheath that is open at both ends, and another strip of film is then advanced to receive the next object. The woolen envelope is considerably wider than the object to be wrapped and, moreover, protrudes over it with both ends. These protruding parts of the tubular envelope can be gathered and welded together so that the object to be wrapped is completely enclosed and prepared for shrinking the film envelope, or the overlapping parts of the film are simply folded together at the ends of the object to be wrapped if the object is completely enclosed with the wrapping film nlch.t. is essential. '- ■ "■■■■

In practice, however, it has been found that this type of Invisibility of an object is disadvantageous if several objects

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booths should be wrapped, especially if foil is used as an outer cover for objects that are already individually a packing cover are provided. Here, the complex shape of the spiral envelope creates a particular problem, and so does the invention is aimed at a method for producing τοη packaging sleeves and to provide a machine for carrying out this method which has better packaging than that of the known Tor-mentioned Allow kind. In addition, the invention is directed to a single pin method and to a machine used for its execution, which can be operated at higher speeds than the known machines.

According to the invention is to produce a packing cover "for an object provided, two lanes of single-wiokel foil next to each other along straight conveyor tracks in the same way To convey direction, the two film webs at points one behind the other in the Förderrlohtung by cross welding to connect and then to open the two film webs between the two transverse welds so that the film strip lying between the two transverse welds forms a tube

The two film webs are preferably made of thermoplastic synthetic material, the adhesive bond of which is made by welding can be produced under pressure and heat. The usual thermoplastic materials are wrapping rolls made of polyvinyl chloride and similar materials which are thermoplastic and which can be welded and separated without using Suitable for heat. The separating cut preferably follows in the area each transverse welding along a transverse cutting line,

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so that the pipe from the previous pipe and from the supplied Foil webs is cut off. The separation process can be carried out with the application of heat.

The film can be supplied in the form of two completely separate, flat webs, which are separated from each other by separate Supply rolls run off, or it can be fed as a double-layer film from a double-layer wound supply roll or any other type of double foil commercially available originate, e.g. presented as a folding film.

The two webs of film are preferably conveyed and welded lying on top of one another, so that the two webs after after making the welds, an elongated, flat one-wiokel casing form between the transverse welds, which subsequently is opened to a tube. It is much easier to quickly produce appropriate cross-welds, if the two layers of film lie flat on top of each other as if they were around a bulky object are laid around and then welded together, as in the case of the known one described above Procedure planned w% r.

To open the elongated sections made of double foil can an opening device can be introduced between the two film webs before the transverse welds are made tad the then after making these welds is actuated to open the tubular packing envelope. Preferably, the opening device consists of a device that is folded in State is introduced between the film layers and has a particularly small thickness in this state, whereupon the device is brought into an upright position in which it opens the tubular packing envelope. In a modified version

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the opening device can be formed by a nozzle that is inserted between the two film layers and then the Packing sleeve after making the transverse welds Injection of air or gas opens.

According to another preferred feature of the invention the object to be wrapped is introduced into the opened foil tube by one end of the object "This can happen because the film tube is pushed with a lateral movement over the object to be wrapped, while both advance on conveyor tracks lying next to one another. Also the one to be wrapped The object can be moved sideways, but this movement must then be in the opposite direction and towards the pipe.

According to a possible method for carrying out the invention, the objects to be wrapped can also alternate from opposite sides of the conveying path of the film web are pushed into the associated film tubes. It is possible Push two objects into two consecutive foil tubes at the same time to increase the Paokgesohwlndigkelt. The foil tube can be at one end between the two cross welds be provided with an end weld, which is made either before or after opening the pipe can; after the object to be packaged has been introduced, the tube can also be welded at that end into which the object has been inserted. In this catfish

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worked especially when the foil cover is on the inside Item is to be shrunk on while hot. Although it would be possible to have several paok covers connected, in most cases it will be necessary at every cross weld the film web to perform a separation so that the wrapped objects can be separated.

According to another preferred feature of the invention, a machine for carrying out the method can be a carrying device for feeding two sheets of film, guide means for bringing them together and conveying the two film webs on top of one another, through a sole device for connecting the two film webs Cross welds, dl © In the conveying direction β »one behind the other liuigweÄew 0 ImiIIuiu lie, and a device for opening the between. both quartz welds initially flat Have foil parts.

Preferably, dl® Maeohine also has a device for Opening the foil tubes, semi © eln / Cie "opening device between insert the two layers of film at a point that is between the transverse welds to be applied subsequently is located. Oils machine should continue to be designed in such a way that that a silative transverse movement between the opened foil tube and the object to be wrapped takes place in order to bring the object into the foil tube. Furthermore, dl® Machine a Proauktfördare? have, which demands the objects to be packaged in the same direction as the foil balms Further features for the preferred embodiment of the invention

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and for different modifications result from the following Description.

The drawing shows an example of the execution of the Machine for the production of pollen pairs, namely show Pig. 1 shows a diagrammatic general view of the machine, 2 shows a schematic side view of the conveyor belt guide,

Fig. 3 is a schematic plan view of the for the production of Roll packs essential parts of the machine,

FIG. K shows a partial side view of the polishing guide, shown on a larger scale,

5 shows a part shown on an even larger scale tenansioht of the foil conveyor belt,

6 shows a partial plan view of the film conveyor during the production of τοη packs,

Fig. 7 is a perspective view of a welding head of the ' Machine,

Fig. 8 an even larger scha # .bl "xL" Liche partial view of · Gear parts of the welding head,

9 shows the perspective view of a partially also in Fig. 7 shown carriage,

10 shows a transmission part shown on a larger scale from Fig.9 »

11 is a diagrammatic partial view of a display device,

■ Sfe Jfa «. - Fig. 12 is a partially sectional view of parts of the welding head,

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13 shows a vertical section along the line XIII-XIII from Fig. 12 with details of the welding head,

Fig. Ik shows a vertical section along the line XIV-XIV of Fig. 7 through another part of the welding head gear,

15 shows the front view of a pack carrier in a retracted position Position,

16 is a view in the direction of arrow XVI-XVI of FIG

Flg. 15,
17 is a vertical cross-section along the line

XVII-XVII of Fig. 15,
18 shows a vertical section along the line XVIII-XVIII

of Fig. 15,
19 shows the package carrier according to FIG. 15 in a further

advanced position,
Fig. 20 the packing carrier in the fully advanced position

Position during the actuation of a stop finger, Figo 21 is a partial plan view of one end of the packaging

carrier according to Fig. 15,
22 shows a view in the direction of the arrow XXII-XXII from FIG. 20 with the device for opening the packs into a working position,

23 shows a detail of the finger actuation device, FIG. 2 shows the schematic plan view of a feed conveyor, 25 shows a section similar to that in FIG. 17, but with a feed ram,

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Pig. 26 the plan of the feed ram naoh Pig. 25 » Pig "27 the plan of a pusher hook arrangement, Pig" 28 a diagrammatic view of the position of the parts after the production of a foil tube with an associated opening device inper closed

Position,
29 is a top-down view of the parts according to FIG

Bring to the open position and ^ Pig. 30 the bottom-pictorial view of a modified embodiment of the opening device.

The machine according to the invention is intended for wrapping regularly shaped, prismatic objects, for example for wrapping rolls of wallpaper that are to be wrapped in a tightly fitting, warm-ear sump made of plastic, for example PVC. For this purpose, the machine has a plurality of treatment stages in which the packaging process is to be carried out. The treatment stages are divided into a horizontal conveying path through the machine, which is indicated in Fig. 2 by the line β 10-10, but can also be designed differently and should not be limited to horizontal conveyance.

At the feed end of the machine, shown in Figs. 1-3 on the is arranged on the left side, there is a follen storage case 12. The foil feed is described in detail below, but it should be noted in advance that the Masohine a plurality of vertically superimposed film supply

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has rollers Ik and 16, one of which can be arranged above and the other below the horizontal conveyor track 10. The machine is designed so that two film strips converge and deliver a plurality of separate Paokhüllen, but the feeding of the film strips should take place one after the other via three conveyors, namely a film feed conveyor 18, a 'Biaifiekel conveyor 20 and a shrink tunnel conveyor 22. Der the latter runs at the exit end of the machine through a shrink tunnel 2k , which is known per se and is used to heat the film, which is firmly shrunk onto the object to be wrapped

The conveying path of the film through the machine is indicated in the plan according to FIG. 3 by the dot-dash lines 26, 30, 32 and Jk . From the supply rolls Ik and 16, the film first runs in the transverse direction along the conveyor track 2β, is then deflected at an angle of 90 ° into the conveyor track 30, then continues along this track and leaves the machine along the conveyor track Jk, the tracks 30 and Jk are laterally offset from one another and are connected by a short transverse slope, which is an important feature of the invention.

In front of the three conveyors 18, 20 and 22, a conveyor for the goods to be wrapped is arranged, which runs along all extends three film conveyors. The conveyor 36 has a plurality of carriers 38, the details of which to be discribed. However, the carriers 38 do not run longitudinally

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a rectilinear path, as shown in the plan according to FIG. 3, but along a path kO, kz _t kk _t k6 _t kQ · and 50. When moving on the path section kO , a carrier moves in a compound movement in the general longitudinal direction and also near the back to the film web. Along the conveyor section 4 x 2 the carrier travels parallel to the film web and then it moves in a composite, stepped motion along lines * 14, k6 and away from the film web and only on the section parallel to it in the general longitudinal direction. At the end of the section 50, the carriers finally run back on a lower track of the conveyor 36 «. The wrapping process is accomplished by the interaction of the conveyor 36 for the articles to be wrapped with the film strip as it moves along the conveyors 18, 20 and 22.

Behind the film conveyor 18 is a housing 5h for the not shown feed gear of the machine, which contains an electric motor and the associated gear parts.

CIu. '

In connection with this, a control section 55 is also provided, which is connected to the gearbox housing $ k by a housing bridge 57.

The film is fed in in a known manner from the feed point 12 and therefore does not require any further description. At the feed point are shown in Fig. 1, two supply rolls I ^ and 16, which are in the longitudinal direction of the machine, so the overall length of the machine can be kept as short as possible. The supply rolls are held on a stationary frame 52,

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which according to Figo 1 can form part of the stationary machine frame or has an independent support frame, that close to the housing 54 for the main drive of the machine is set up.

The drive housing 54 has a forwardly projecting support arm 56, on which one end of a round rod 58 is supported which sits with its other end in a projection 60 of the frame 52. The round rod 58 is to the axes of the Film supply rolls and inclined at 45 to the subsequent conveying path of the film web through the machine, as shown in FIG Plan of Fig. 1 and 3 is shown. The film web runs from the round rod at an angle of 90 ° to its feed direction away. The round rod 58 is assigned to the film web running off the upper supply roll 14. A second Round rod 62 with one end in a neck 64 of the frame and sits with the other end in a holder not visible in FIG. 1, which corresponds to the support arm 56, is used for deflecting the film web running off the lower supply roll.

In the feed area 12 of the film webs, the supply rolls 14 and 16 are assigned two sets of tensioning rolls. Of the upper roller set includes three parallel tension rollers 66, 68 and 70, which are arranged in the path of the upper web of film, as well two tensioning pulleys located halfway down? 2 and 74, which are freely rotatably mounted and, as shown in FIG can be moved up and down

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The pile web 80 running from the upper supply roll 1 ^ runs back and forth in zigzag over the tensioning rollers 66, 72, 68, 7 * f and 70 and then to the inclined round rod 58. From the round rod 58 the pile web then runs in the direction of line 30 according to Fig. 3 further through the machine.

The weight of the tensioning rollers 72 and 7 ^ arranged at half height is borne by the pile web 80, so that the pile web is tensioned by the weight of these rollers 72 and 7 ^. The part of the pile web running back and forth between the upper tensioning rollers 66-7 forms a supply strip which has already been pulled off the supply roller. If the machine needs a quicker supply of film than is possible by pulling it off the supply roll I ^, this additional supply "can be delivered by the tensioning device, whereby the auxiliary supply available there is bypassed by lifting the tensioning rollers 72 and 7 ^. If, on the other hand, less polien web is temporarily required than the running speed of the supply roll I ^, then the tensioning rollers 72 and 7 * J · are released downwards so that the auxiliary supply of the film web available in the tensioning device is temporarily increased.

The lower tension roller set has three stationary tension rollers 82, 8Ψ and 86 and two between and below, vertically movably mounted tensioning rollers 88 and

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which in their entirety correspond to the upper tension roller set. The film web 92 running off the lower supply roll 16 runs over the tensioning rollers 82, 88, 8 * f, 90 and 86 and then under a separate guide roller 93 »from which it comes to the deflection rod 62.

The feeding of the film webs is completed by two vertically spaced pairs of clamping rollers 9 ^ and 96, the rollers of which lie together under spring pressure, and two guide rollers 98 and 100, which are slightly perpendicular to each other. Behind the inclined dog bar 58, the upper foil beam 80 runs through the pair of clamping rollers 9 ^ and under the upper guide roller 98. The lower foil web 92 runs behind the inclined round bar 62 through the clamping roller pair 96 and over the "$ e're guide roller 10O ₀

At the Pührungs.rollsn 98 and 100, the two film webs 80 and 92, a mouth _s behind the two webs flat to an enclosure together werden.Die film feed results in the film webs from the supply rolls 14 · and l6 to the guide Ungar coils 98 and Looo Na rlleh It must be ensured that the two webs are exactly aligned with one another transversely to their running direction, whereby they normally lie together with the longitudinal edges. To ensure this, the supply rolls 14 and 16 are axially split so that the two supply rolls can be displaced against one another in their longitudinal direction if necessary. This axial alignment of film webs is known and customary.

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There is an important feature of the machine according to the invention in that the upper guide roller 98 is not so far forward, lies like the lower guide roller 100.

The use of a film feed in which the supply rolls are essentially parallel to the general direction of travel of the film webs lying through the machine is not essential. If necessary, the film feed can be designed in such a way that that the axes of their supply rolls are transverse to the general direction of travel of the film webs, so that the film webs up to the guide rollers 98 and 100 on a straight path.

The two run behind the guide rollers 98 and 100 Film webs 80 and 92 on the film conveyor 18 against each other, and thereby they form a plurality of flat wrapping envelopes, which have open ends, but are welded at their side edges. For this, rough on in the longitudinal direction at a distance places lying across from each other a transversely zuäsn film webs horizontal welding and cutting device are provided. This device cuts through both sheets of film and forms on each side of the separation point a transverse zürn film conveyor 18 lying weld seam through which the trailing edge of a Foil envelope is welded to the leading edge of the following envelope. Each shell then lies between two on top of each other the following working conditions of the welding and cutting device, and since the film webs over the guide rollers 98 and 100 constantly run evenly, this creates a sequence of separate shells that leave the film conveyor 18 and to

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Einwiokelf or he 20 run further.

The conveyor 18 has a special design that is aimed at creating a resilient pad on which a welding and sons-oath device can be relied upon can work. This particular embodiment of the conveyor 18 is shown in FIGS. The main drive housing 5 ^ is here with two support arms 102 protruding on one side and 10 * 4- provided, which in the area of the film conveyor 18 below the horizontal conveyor track 10 protrude. The support arms 102 and 10 * 1-wear the film conveyor 18 and consist of correspondingly long tubes with their rear, not visible ends are welded or otherwise attached to the machine frame. On the support rods 102 and 10 ^ are on opposite sides two plates 106 and 108 fastened with nuts 110 which are screwed to associated threads of the support rod ends. Spacer sleeves (not shown) are provided between the plates 106 and 108.

A drive shaft 112 is journalled on plates 106 and 108 and protrudes beyond the outer surface of plate 108, into the gear housing 5 ** and a driven sprocket 11 * 1 · carries. The sprocket 11 * 1 · is not shown by a The chain is driven by the drive motor of the machine via an associated gearbox, so that the shaft 112 remains constant Speed rotates as long as the machine is switched on. Parallel to the drive shaft 112 is on the plates 106, 108 a Shaft 116 freely rotatable, but not in the gearbox

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housing 5 ^ protrudes. 4 «? / 14p /

On the outer surfaces of the plates 106 and 108, the shafts 112 and 116 each carry two firmly keyed sprockets 118, which are connected on each side by a roller chain 3120 o With the lower run, each of these chains is guided on a central chain tensioner 122, which is on the associated plate 106 or 108 is mounted adjustable in the vertical direction. The upper chain strand leads on a slightly longer one Guide bar 12 ^, the top with a horizontal tread is provided for the rollers of the roller chain. The guide bar 124 is not adjustable, but it is important that its surface is in a certain position because the height of the film conveyor 18 depends on it.

According to FIG. 5, two adjacent rollers 128 of each chain 120 are bridged by a U-iron 126 that is extends across the entire width of the film conveyor. Each U-iron 126 carries a metal rail permanently welded to it 230, / dierinl their ends over the ends on both sides the U-irons protrude ^ and with their longitudinal edges lie tightly together when moving along the upper run, so that they practically form a coherent platform. Each rail 130 is covered with a heat-resistant strip 132 of silicone rubber covered, and these cover strips result in their entirety a closed, resiliently flexible wing, a part of which is shown in FIG. 5 on the right.

On its outside is the one from the chains 120, theirs U-iron, cross rails and cover strips made of silicone rubber

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formed foil belt conveyor from an endless belt 13 ^ Surrounded by polytetrafluorethylene (PJEKE.}. The tape 13 ^ runs around Guide rollers 136, I38, 1 ^ 0 and I * f2 and stands on his Lower surface in contact with a tension and deflection roller I * t4 » The guide rollers are arranged in such a way that the upper, horizontal part of the belt 13 ^ with the flexible support surface formed by the cover strips 132 is based. This is the effective part of the endless belt. The guide roller 1 ^ -2 also serves as a drive roller for the endless belt 13 ^ and is supported by an outwardly protruding Drive shaft of the gear housing 5 ^ driven while the guide rollers I36, 138 and 1 ^ -0 rotate freely. The drive of the tape 13 ^ is designed so that the linear speed of movement of the tape with that of the cover strips 132 coincides, so that between the endless belt 13 ^ and there is no relative movement of the wing formed by the cover strips I32.

The band 13 ^ and that formed from the cover strips I32 Wing together form the previously mentioned Follenbahn · »- conveyor 18, and as the two webs of film 80 and 92 pass over the top surface of that conveyor, will turn off they formed separate wrapping envelopes. How this happens is indicated schematically in FIG. A welding bar 150 » which is shown in Fig. 7 below, runs over the endless Volume 13 ^ t as this will be described in more detail, and will thereby temporarily up: the film webs 80 and 92 lowered.

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According to FIGS. 12 and 13, the welding bar 150 has an electrical one Resistance wire 152, which is attached to the lower surface of the Welding head is arranged and comes under power with each downfall of the welding head. This has the consequence that the Heating wire the two layers of foil in succession Cross lines 154 · (Fig. 6} cuts through.

According to FIG. 13, the welding head 150 consists essentially of a metal rail with lateral grooves 151 and 153 in which electrical resistance wires 155 are arranged. The resistance wires 155 are each arranged in a protective sheath. These resistance wires are constantly energized when the machine is working and are intended to keep the welding head I50 at a temperature suitable for welding the film strips while the machine is working. This temperature of the welding head or its welding bar I50 is controlled by a thermostat Edge zone 158 is behind the transverse line 15 ^ - and the edge zone 160 is in front of the transverse line 15 ^, since the film web runs in the direction of arrow I62 in FIG. 6 through the machine. In practice, the welds 158 and 160 are very close together, and their distance from one another is shown correspondingly larger in FIG. 6 only for the sake of better clarity.

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The in 6 continuously from the left through the guide rollers 98 and 100 fed film webs 80 and 92 in two transverse strips, as shown at 170, the then be forwarded to the right. At the same time, the leading and running edges of the foil strips are welded together so that a foil tube open at the ends is formed is, but in the at the right end of Flg. 6 shown XiB | Ht is still laid flat.

In Fig. 6 the ftl / tn pipe 10 has already been moved further in the conveying ohting beyond the point at which it is made by cutting the continuously conveyed film webs. This is due to the fact that the white threading has a quick yoreohub for the newly cut tube, which is immediately when the tube is cut Pollen webs are wlrksaa, so that the cut polien pipes are actually separated from each other. The separation of the foil tubes is essential, because the single winder is required 20 ait greater conveyor speed works than the foil conveyor; 18 and the foil tube that has been moved apart must continue to run at the same speed as conveyors 20 and 3 & *

Uli to ensure that the polienbahnen are effectively lifted from the conveyor 18, according to fig. $ and a VoraehulMohlltten 172 provided, which is supported by old Bollen 248 and 2 | 0 on the polishing clay% md they en the surface

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of the endless belt 134 pushed the carriage 172 has a reciprocating drive which is designed so that during its forward movement the Rolls 248 and 250 do not rotate, only the film webs push against each other and against the endless belt 134 so that the rollers 248 and 250 move at the same linear speed circulate like the endless belt 134. They therefore only serve to hold down the film webs on the endless belt

The welding head 150 is also on the feed tube slide 172 mounted, and it is pressed down on the film webs at the moment in which the feed carriage its advance begins. As soon as this feed has ended, the welding head is withdrawn upwards and moves with it the feed slide 172 back to its starting position. The stroke of the feed carriage in its reciprocating movement is set up so that its wheels over the largest Part of the length of the silicone rubber cover strips 132 formed wing, but never roll over the ends of the wing.

The welding of the two film webs takes place during the entire advance of the welding head. this makes possible precise control of the welding process, which is carried out by the Temperature of the welding head 150 and is determined by the duration of the installation of the welding head on the film webs. Accordingly the sweeping process can be controlled by regulating the feed rate

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controlled by the film webs and the welding head I50 will.

The gearbox to drive the reciprocating movement of the feed platform and the vertical movement of the Welding head I50 is shown in Fig. ^ - 14 illustrated and is now described in more detail «

The whole weld head gear shown in Fig. 7 is Arranged above the foil belt conveyor 18 in a housing 174 (see Fig. 1). A shaft protrudes from the main drive housing 54 into the housing 174 and is driven by the main drive motor via gear driven at a speed that is matched to the speeds of the various conveyors. on A main drive cam 178 is firmly keyed to this shaft I76, which has circumferential grooves 180 in its two end faces, in which a driver, not shown, is guided. the Driver sit on a sliding guide 182, which with Gleitblöoken 184 is provided. The sliding blocks run on four horizontal guide rails 186. The cam and driver assembly is used to convert the rotary motion of shaft I76 in a reciprocating movement of the slide 182. In practice, the task of the drive cam is to provide a fast Advance movement of the slide in the direction of arrow 188 and a slow return movement in the opposite direction to convey.

Two parallel levers 190 are at their lower Ends connected by a pivot pin 192, which is held in fixed bearings, not shown, dokass the

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Lever 190 can swing around the pivot pin 192. At her upper ends are dl © lever I90 with longitudinal slots 19 ^ ver ' see, in which Aohsstummsl I96 slide, the tone «hem above Slide block I98 protrude outwards. This upper track block I98 consists of two half-shells, which are on opposite sides of a stationary middle slide bar 200 of rectangular Cross-section. A cross pin 202 of the rear slide block 184 penetrates the slots formed in the levers 190 arranged and not visible in Fig. 7 U loaded, and fcwar an a point between the hinge pin 1 ^ 2 and the articulation parts the lever 190 on the upper slide I98. If the Slide carriage 182 ″ goes back and forth, its adjusting movement transferred to the lever 190, and these cause a horizontal reciprocating movement of the upper Oleitblooks 198. The The upper sliding block moves on the finest finger way the sliding contactor at 182, as is the case with the gear ratio the lever 190 conditionally 1st.

A substantially triangular flaehx-ahraen 20k 1st * tt its tip on the upper edge of the upper slide block 198 attached, and its two front ends are respectively connected to front oils it blocks angebreoht 106, of which FIG. J and 8 only one Gleltblook see is. The main drive jack 178 is located in the vertical central plane of the SohvelB head gear, which is on the sides of this central plane so that it is formed. ΊΆθλ whole in flg.? and 8 removable gears are also located below in the same arrangement

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the other front corner of the triangular flat frame 204. For ease of understanding, this is on the other side lying part of the transmission in Fig. 7 and 8 has been omitted.

The slide blocks 206 are similar to the upper slide block 198 and are on associated horizontal slide bars 208 guided by a rectangular C ^ section. When walking around of the main drive cam I78, the entire flat frame 204 with its three sliding blocks I98 and 206 goes into FIG horizontal plane back and forth »

Each stationary slide bar 208 forms part of a stationary trapezoidal frame that is attached to the associated side of the Welding head and the feed gear for the film webs lies. This trapezoidal frame includes a slide bar 208 parallel, lower frame rod 210, furthermore a vertical rear support 212 and an inclined front support 214, whose Reference number In Fig. 8 is entered in two places.

On opposite sides of each front glueless look 206, according to FIG. 8, two bearing journals 216 protrude outwards, the associated longitudinal braid 218 in the upper ends of two Levers 220 protrude through, which are arranged on both sides of the front, inclined support 214. The lower ends of this Lever 220 encompass ei / Bn lower slide block 222, which is similar how the upper slide blocks is formed and is guided on the lower slide rod 210-. The slide blocks 222 sit firmly on a transverse lower U-iron 226, the one

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Part of the feed slide 172 according to FIGS. 9 and 13 forms.

The pivot bearing of the lever 220 is by two "coaxial Axle journals 22 ^ formed on opposite sides a sleeve 226 which encloses the inclined front support. According to FIG. 8, these stub axles protrude Longitudinal slide 228 of the lever 220. The upper slide block moves 206 therefore forward, the lower slide block 222 is moved rearward by the levers 220, and therefore the Feed carriage 172 through the main drive cam 178 one - slow advance in the direction of arrow 230 and rapid return movement in the opposite direction.

From the following it will be seen that it is desirable to be able to adjust the length of the working stroke of the feed slide 172, and this is accomplished by changing the position of the lever pivot pins 224. The square sleeve 226, which carries the axle journals 22 ^, "is slidable along the inclined support 21 ^ and is provided with a threaded attachment 232 which sits on an adjusting spindle 23 ^. The adjusting spindle is rotatable in bearing lugs 236 and 238 of the inclined support 21 ^ f- and carries a helical bevel tooth ra4 2 ^ -0, which can be rotated on each side of the machine with an adjusting shaft 2 ^ 2, which carries a corresponding counter gear Zkk at each of its ends.

The actuating shaft 2 ^ 2 is equipped with an actuating device, not shown provided, with which it can preferably be rotated by hand. The actuator can

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For example, have an ^{adjusting handle arranged on the housing 17 2} *, with which the adjusting shaft 2 ^ 2 can be rotated by an operator working on the machine. This could also be achieved by a push-button controlled auxiliary motor. .

If the adjusting shaft 24-2 is rotated, it drives the threaded spindle 23 ^ and causes an adjustment of the square sleeve 226 along the SGhrag support 21 * f upwards or downwards «through Raising the bearing axis 22 * f becomes the stroke of the feed slide 1? 2 extended by adjusting the Aohszapfens downwards shortened. Since the angular velocity of the main drive cam 178 and the feed slide 172 remains constant therefore the same actuating time is required for each back and forth movement, the lengthening of the actuating stroke is associated with an increase in speed and vice versa.

The levers 190, the triangular frame 20 ^ and the levers 220 in their entirety form a lever or link arrangement which effects the reciprocating movement of the feed slide 172. It is possible to change the setting stroke of the feed slide characterized in that the effective length of the transmission parts is changed ^1. Changing the position of the fulcrum for the lever 220 is a particularly simple means of achieving this change in stroke.

According to Fig..9j 12 and 13, the Vorsohubschlitten I72 the transverse, downwardly open U-iron 225, which is provided with four downwardly projecting supports 246, of which

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two each on the front edge of the U-EIsen and two on its Rear edge are arranged on the two front supports 246 is the front support roller 248, on the two rear ones Support the rear support roller 250 mounted. The location of the Gleitblookes 222 is indicated in Fig. 9 by the holes 252, which serve as bolt holes for attaching the slide block 222 to the U-iron 225. The support rollers 248 and 250 roll off on the film webs when they are carried along by the endless belt 134 of the film conveyor 18, Vobei the film webs are pressed against the endless belt 134 during the welding and cutting process.

At the rear of the carriage and the welding head gear is located within the housing 174 a Hollenkette 254, the length of which corresponds approximately to the length of the lower chain 120 according to FIG. The roller chain 25 ^ has chain links 256 around two sprockets and 260 are led around, which in turn sit on horizontal waves. The shaft 262 shown in Fig. 9, which the Sprocket 26O carries, protrudes into the main drive housing 5 ** and carries a chain pinion 264 which is driven by a chain 266. The drive of this chain is from the drive of the lower one Roller chain 120 derived. The chain drive is designed so that the lower horizontal run of the chain 254 in Direction of arrow 268 is driven forward at a speed equal to the forward speed of the upper Run of the cover strips 132 and the endless belt 134 of the

$ 09883/0378

Foil conveyor 18 matches.

In the extension of each of the support rollers 2 ^ 8 and 250 is a shaft 270 which carries a chain pinion 272 which meshes with the lower run of the chain 25 ^ if one assumes that the chain 25 ^ is stationary, so the support rollers 2 ^ 8 and 250 "run when the feed carriage moves I72 forward in the direction of gaze 9 in the direction of rotation of the clockwise, while they move in the opposite direction during the movement of the feed slide 172 to the rear to be turned around. The movement of the chain 25 ^ - causes but a different rotational movement between the chain sprockets 272 and the lower run of the roller chain 25 ^> and where this speed of rotation drops to zero, the support rollers 2 ^ 8 and 250 do not rotate about their own Axes, but only move along with the advance lifting slide 172, during which they remain at a standstill »

It has already been mentioned that the lower run of the roller chain 25 ^ driven at the same linear speed is like the upper run of the cover strip 132 of the film conveyor, Therefore the support rollers 248 and 250 are used during the movement do not rotate forward around their own axes, the feed slide I72 moves synchronously with the film conveyor and at the same linear speed.

Located at the front end of the trailing support roller 250 According to FIG. 11, a display lens 25 * f, which is attached to a short Shaft attachment of the support roller 250 is attached and is in

309883/0 37

a holder 276 attached to the U-iron 225 rotates «The holder has a pointer 278 that extends across the front face the display disc 27 ^ · is located. The disk is on hers The front surface is provided with alternating dark and light sectors. This front surface of the indicator disk 27 ^ is on the front surface of the housing 17 ^ visible and conveyed hence a visible indication of any relative movement between the feed carriage 172 and the lower run of the chain 25 ^ i when the carriage is advanced. If there is no relative movement, which is desirable in itself, then find also no rotation of the indicator disc 27 ^ instead, so that they remains at a standstill with respect to pointer 278,

When the display disc shows 27 ^ by turning, It is that a relative movement takes place during the movement of the feed slide with respect to the endless belt 13 ^ necessary to regulate the speed of movement of the carriage, because otherwise it could happen that the support rollers 248 and 250 block the polien webs or on the foil webs

grind, create crevices or waves. Of course it's possible, to regulate the speed of movement of the feed slide in that the pivot bearing 22 ^ the lever 220 in the original Position is postponed. The drive of the roller chain 25 ^, however, allows the feed movement of the feed slide 172 with that of the film conveyor 18 synchronize.

When the feed slide 172 travels backwards, a considerable amount occurs different movement between the chain sprockets

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272 and the chain 254 in which the support rollers 24-8 and 250 rotate rascti, but this is not essential. The pitch circle diameter of the chain pinions 272 is equal to the outer diameter of the support rollers 248 and 250. As a result, the support rollers 248 and 250 have a circumferential speed during the return movement of the feed carriage 1 - 2 which corresponds to the movement speed of the endless belt 144 on which the film webs are advanced, and the fact that the film is promoted such as by a pair of pinch rollers, d _o h is obtained. that no slippage between the support rollers 248 and 250 on the one hand and the endless belt 134 on the other hand occurs.

As can be seen from FIG. 8, there are upwardly projecting bars arranged in pairs on the transverse U-bar 225 Stand 280, between which a three-part box girder 282 can be displaced in the vertical direction. The stands 280 are provided with downwardly protruding legs 281, which protrude below the web of the U-iron 225 and on which the welding head 150 on each side with clamping pieces 283 made of plastic or rubber is supported »Similar clamping pieces 284 · are located further up between the two sides of the box girder 282 and the inner surfaces of the uprights 280. The uprights are on their inner surfaces provided with a groove 287 for receiving holders 289 and 291, the box girder 282 and the welding head 150 protrude outwards. These holders are used to prevent twisting of the box girder 282 and the welding head 150 to the

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To prevent uprights 280. The box girder 282 forms part of the welding head, and supports 28 * 1-, which are shown in FIG. 9 »12 and 13 with their upper ends are attached to the box girder 282, protrude through the web holes of the U-iron 225 and are with their lower ends attached to the welding head 150. Every Support 28 ^ · is provided with a compression spring 286 and between the surface of the U-iron 225 and the lower surface of a spacer sleeve 283 clamped, which is arranged in the box girder 282 is and puts him under pressure from the inside, and thereby the box girder 282 in its normal, ineffective Holds raised position in which the welding head I50 is engaged with the underside of the web of the U-Elsen 225. In In this position, the heating wire 152 causing the severing cut of the film webs is from those lying on the conveyor 18 Film webs are lifted off while the film webs are removed from the support rollers 2 ^ -8 and 250 pressed against the carrier plate of the conveyor are.

The gear for pressing the welding head 150 against the film webs to produce a weld seam is shown in FIGS . 7, 8 and 1H. A front extension 288 of the main drive shaft 176 is provided with a welding cam 290, namely the front end of the shaft extension 288 is supported on a stationary holder, not shown. A guide pin 292, which is attached to a vertical support 212, forms a bearing for a twist beam, which consists of two parallel

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Handlebars 29 ^ is formed at the rear end by a Querstüok 295 are connected. The handlebars 29 ^ are longitudinal slots 296 provided, with which they are guided on the cross pin 292, so that the twist beam on the cross pin can slide. Between the links 29 ^ 1st a driver supported by a compression spring 300 on the peripheral surface of the cam 290 can be pressed, namely the compression spring 300 between the rear edge of the vertical support 212 and the rear cross piece 295 clamped.

An angle lever 302, which is shown on a somewhat larger scale in Fig. 8, is pivotable with a bearing axis 304 in stationary bearings (not shown), one end of this angle lever being connected to the front end of the link 29 ^ and the other end to it engages a crossbar 306, which is arranged at the rear end of a hold-down frame 308. This frame 308 is formed by two lateral frame rods 3IO, which at the rear by the cross rod 3O6 _; at the front end duroh a cross rod 312 are connected, and 'the entire frame is held in guides not shown, in dent. ■ he can move freely in a vertical direction. Therefore, if the cam 290 pushes the driver 298 and the link 29 * f forward, the resulting pivoting of the angle lever 302 results in a downward displacement of the hold-down frame. In order to facilitate the vertical movement of the hold-down frame 308, a second angle lever, which is similar to the angle lever 302, can be arranged at the front end of the frame, specifically on its crossbar 312

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Arrangement and storage, and the two angle levers can be connected by a horizontal link so that they perform their rotary movements together.

The welding cam 290 is designed to perform the lowering motion causes when the feed slide 172 is in its most retracted position, so the Foil feed end of the machine is closest, the welding cam 290 is still arranged so that it hold down frame 308 in the lowered position holds until the feed slide 172 comes to its most advanced position.

On the transverse box girder 282 a plurality of roller holders 31 ** - are arranged, each of which has a holder with four rollers is provided. In Fig. and 8 only one such pulley holder is visible in each case. One such roll holder each sits on each outer portion of the box girder 282, and another roll holder sits near each end of the middle part of the box girder. Thus, there are two reel holders on each side of the gearbox, and each holder points two pairs of rollers 316 on the lower edge of the lateral The frame rods 310 of the hold-down frame are in contact. The roll holder are also designed so that the Vorsohubschlitten 172 and the hold-down frame 308 only in a vertical position Can move direction.

This should make it clear that during the return movement of the feed slide 172, the welding head 150 with the film webs does not come into contact with the support rollers 2 ^ 8 and 250 however, unroll on the film webs. The support rollers 2 ^ 8 and 250 never come γοη the surface of the film webs 80 and 92 free, but constantly ensure that the film webs 80

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and 92 pressed against the surface of the film conveyor 18 stay.

During the forward movement of the pre-cutting slide 172, the film webs are held down by the support rollers 2 ^ 8 and 250 and the welding head 150 is lowered so that its lower surface rests against the film webs. The resistance wire 152 is pressed into the superposed sheets of film _f and mediated by the cover strip 132 resiliency of the support surface byingt it about that the resistance wire can be etigedrückt in the endless belt 13 ^ 152, so that a reliable Trennsohnitt and good Verschweißfcung materialize come. Towards the end of the advance of the feed sole I72, the welding head 150 is raised again by the springs 286.

At the front edge of the three-part box girder 282, according to FIG. On the shaft 270 of the front support roller 2 ^ 8 sits an overrunning clutch 324, which engages with a ring gear with the teeth 322 of the rack 320 _(o s.Fig 10). The toothed rack has the task of transferring a counterclockwise rotation to the shaft 270 and the supporting roller 2 * f8 connected to it when the box girder 282 moves upwards, while no reverse rotation is absorbed by the shaft 270 when the box girder moves downwards will.

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When the weld head I50 is depressed to create a weld produce, the rack 320 transmits a clockwise rotation to the ring gear 326 according to FIG. 10, which »About not passed on to wave 270. Will the The welding head, on the other hand, is raised after the weld seam has been produced, the rack 320 thus produces a rapid counterclockwise rotation of the shaft 270. At this point the support roller is located 250 at the front end of the subsequent film webs 80 and 92, but the support roller 248 is nooh on the newly formed film strip 170, which is from the remaining part the film web should be cut off. The sudden and rapid rotation of the support roller 2 * 1-0 moves the strip I70 before and ensures that he quickly comes free of the subsequent part of the film web.

It has already been mentioned that the objects to be wrapped synchronously with the film webs by means of a product, conveyor 36 are advanced with carriers or receiving pockets 38 is provided. This product conveyor 36 * the is only indicated schematically in FIG. 2, according to FIG housed in a housing 328, which is arranged next to the conveyor device for the film webs and extends to Shrink tunnel conveyor 22 extends. This conveyor device will now be described in more detail.

According to FIGS. 15 and 21 consists of the product conveyor 36 Is substantially of two endless roller chains 330 * dl · as shown in FIG. Zk üb associated sprockets 362, 366 and 368 * 364- circulate, long in accordance with horizontal upper and

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lower chain guides are arranged. The two chain wheels 366 and 368 arranged at the front end sit on a common shaft 370, and the two rear end sprockets 362 and 36 ^ are also through connected to a common second shaft. The front shaft 370 protrudes into the main drive housing 5 ^ · »where your drive from The main drive motor of the machine is derived via a gearbox. The product conveyor 36 is therefore in time coincidence driven by the foil conveyor l8.

The carriers 38 of the product conveyor 36, which are to be wrapped To accommodate objects, each have two parallel support bars 33 ^ and 336 (see also Fig. 16 - 18), which extend in the transverse direction of the conveyor. The front support rods 33 ^ are at their ends with extension pins 338 provided, which are directly in the hollow pins of the roller chains 330 fit so that the chains support rods 33 ^ - can take away. The support rods 336 are connected to the chains by crank-like links 339 so that the support rods 336 move freely up and down with respect to the chains } 'Inside.

Each carrier 38 has a head 3 ^ -0, as a cast body is made of metal or plastic. According to FIG. 17, this head 3 ^ -0 has a substantially U-shaped Cross-section. At each end of the beam 38 there is a support block 3 ^ 1 or 3 ^ 3. The support block 3 ^ 1 is with after wing-like projections protruding below 3 ^ -2 provided ^ and the like Approaches 344 are according to Fig.l6-18 also on the

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inner support block 3 ^ 3. These approaches contain holes for The support rods 33 ** - and 336 are accommodated. There are also slide rods 3 ^ 5 provided on which the head body 3 ^ 0 can slide so that it is freely movable in the transverse direction of the machine.

On the two head bodies y * d and y ¥ L a support trough 3 ^ -6 for the objects to be wrapped is attached, which according to Fig.l6 - 18 has oppositely inclined inner walls so that it can accommodate rolls of wallpaper of different diameters. In Fig. 18 those different roller diameters are indicated with dot-dash lines V-R, which in both cases have a reliable support on the trough.

At each end of the outer head body JkO a slide block 3 ^ 8 is slidable on a slide plate 350, which holds the carrier 38 on the path determined by the guide plate 350, but the slide block can lift off the plate 350 when the carrier moves 38 is located at a turning point of the conveyor 36.

Under the outer head body 3 ^ 0 there is an after Support pin 352 protruding from below, which at its lower end serves as a holder for a sliding foot 354. This sliding foot can consist of a roller that can be rotated around a vertical axis.

2ty, the housing 328 of the product conveyor is provided with elderly guides 35 and 358 which are connected by rods 360. The product body 36 is a chain

input

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, 366 d '

conveyor that is guided on sprockets 362, 364, 366 and '368 is whose shafts are mounted on the side walls of the housing.

A guide track 372 is provided on the housing of the product conveyor, in which the sliding foot 354 of the "outer Head body 340 leads. In Fig. 24 there is only the center line the guideway 372 indicated, w & s-

i srichp. The guideway is endless and follows the general outline of the product conveyor itself »the upper part of this guideway consists of a short section 374 of the parallel to the general direction of travel of the wrapped goods

a /
through the machine lies / rearwardly inclined section 376, a second section 378 which runs parallel to the general conveying direction of the goods to be wrapped through the machine, a section 38O inclined towards the front, a third section 382 which runs parallel to the general conveying direction and finally a forwardly sloping section 384. The greater part of the return path of the track is sloping to return from the forward position at the outer end of section 384 to inner section 374 at the discharge end.

When the carrier 38 is along the upper track of the conveyor moves, the sliding foot 354 runs on the track 372, wherein the Section 376 of the guideway an inclined inclined conveyor which is indicated by the line 40 in FIG. 30

input

received csn ..
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Is, and the forwardly inclined sections 380 and 38 ^ of the guideway cause corresponding inclined inclined conveyors kk and ^ Q of the carrier. The inclined return guide 372 is used to control the transverse movements of the carriers 38 as the latter move along the upper guide of the product conveyor 36.

Each carrier 38 is provided with an opening finger transmission which is indicated generally in Fig. 15 _s l6, 18, 20 and 22 386. Two opening shafts 388 and 390 lie on opposite sides of the carrier 38 and are each provided with an actuating plate 392 which is attached to the associated opening shaft 388 or 39O and rotates with it. Furthermore, a finger plate 39 ^ is rotatably mounted on the shaft 388 or 390 -. The two opening finger gears have the same design with the exception that they work in opposite directions, so that it is sufficient if one of the gears is described in detail. A torsion spring 396 wound around the shaft 388 has one leg 398 which rests on the lower surface of the plate 39 ^ and another leg * K30 which rests on the surface of the plate 392. In this way, the torsion spring 396 holds the plate 392 normally flat against a shoulder 4 * 02 protruding from the plate 39 ^ so that the plates 392 and 394- are substantially coplanar. If the opening finger gear is in the inactive position according to FIG. 15, the plate 39 ^ connected to the actuating shaft 388 lies on the corresponding plate which is connected to the shaft 390.

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Each opening finger gear has three rods 4o6, 4-08 and 4-10. The rod 406 is attached to the carrier 38 and stands out over its rear end to the rear. Each of the rods ^ 08 and 4-10 is attached to plate 394 with screws 4-12, the slots 4l4 of the plate protrude so that it is possible to offset the opening fingers laterally relative to the longitudinal center axis of the carrier 38 and to be adjusted relative to one another. "

If the shaft 388 in Fig. 16 and 22 from the inoperative position in which the plate 394 is essentially horizontal, rotated to the left into the operative position shown in FIG. 22, the actuating plate 392 moves at an angle - which is slightly larger than a right angle, and takes the plate 394 with it. The movement of the plate 394 is limited, however, as will be discussed below, and during the latter part of the rotation of plate 392 the plate 394 remains in a substantially vertical position Position and can complete its movement by opening spring 402.

At its front end, the shaft 388 according to FIG. 23 has a section 416 of somewhat larger diameter with the a helical groove 418 is provided. On the rod 334, a pin 420 is slidably mounted with a Mandrel 422 protrudes into the helical groove 418. Under the Holder of the pin 420 is a cylindrical slide shoe 424 which, according to FIGS. 15, 19 and 20, is inserted into a finger actuation groove 426 protrudes from a U-shaped cross-section. The groove 426

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is designed to be endless, similar to the cam guide 372, namely the axis of the guide 426 is indicated in FIG. It should be noted that the guide 426 over runs parallel to guide 372 for the greater part of its length. However, at 428, guide 426 has a portion that diverges rearwardly toward guide 372, and at 430 a portion that converges toward the guide 372 rearward.

As far as the two guideways 372 and 426 "parallel run, the sliding blocks 35 ^ and 424 in move parallel tracks so that no relative movement between the pin 420 and the remaining part of the carrier 38 takes place. When the sliding shoe 424 passes through the section 428 in its guideway, it moves along the Rod 334 to the rear, and there the shaft 388 against axial movement is locked, the rectilinear movement of the pin 420 is converted into a rotary movement of the shaft 388. Practically the helical groove 418 is formed so that it is a partial rotation during this backward movement of the pin 420 the shaft 388 can generate by 105 °. The shaft 388 remains in this rotational position during the movement between the Set 428 and 430 of the guideway 426, and if so then the Sliding foot 424 passes through section 430 of the guide the pin 420 on the rod 33 ^ moved forward to the To turn shaft 38 ″ back into its starting position.

The guide 426 thus produces a rotation of the skin 388, which is required to turn the finger actuation gear 386 off

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to bring the ineffective horizontal position into the vertical actuation position. A similar actuation pin is also provided for the shaft 390, the sliding shoes of the two pins running in the same guide 426. Of the however, the gago sliding shoe associated with the shaft 388 runs in front of the slide shoe of the shaft 390 in the guide, so that the shaft 388 is rotated a little earlier than the shaft 390. The plate 394 associated with the shaft 388 goes off the track of the plate associated with the shaft 390 before the latter begins its rotary motion «.

The opening finger gear creates a way of a Open the end of the foil tube I70 to get a roll of wallpaper R to be able to insert. However, a further gear must be provided to the roll of wallpaper H in the transverse direction to push the carrier 38 into the foil tube 170. According to Fig. 25 and 26 are two holders at each end of the beam 38 440 and 442 are provided, one pair of holders attached to the head body 340 and the other attached to the rear end of the trough 346 is. Two push rods 444 and 446 extend along the carrier 38., and one of these push rods is attached to the two holders 440 and 442 mounted. The slide gear is omitted from FIGS. 15-20 for the sake of clarity been. On the push rods 444 and 446 there is a slide Ή & νί 448 displaceable, which is thus along the trough 346 of the Carrier 38 can move. One protrudes from the slide bloom 448 Push rod 450 backwards and wear! rear end one

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Thrust washer 452, the size of the diameter of a to be wrapped wallpaper roll R is adapted. The length of the push rod 400 is dimensioned so that the thrust washer 452 can slide over the opening finger gear ^ 86 if the slide block 448 comes into its rearmost position, in which it is located approximately at the rear end of the trough 346.

above the product conveyor 36 are according to Pig. 27 two fixed stop strips 454 and 456 are provided (see also Fig. 27). Each of these stop bars consists of a straight angle iron that sits on associated holders 458, protruding upward from housing 328 of product conveyor 36, *, and have cantilevered projecting support arms at their upper ends, on which the stop strips 454 and 456 via dam Product conveyor 36 are attached.

Above the slide block 448 there is an upwardly projecting, cylindrical driver 460, which is in a vertical position Level is aligned with the stop bars 454 and 456. 27, the stop bar 454 is in the direction of movement of the product conveyor 36 is inclined backwards and consequently when the driver 460 after the longitudinal advance of the carrier 38 comes into engagement with this stop bar, a rearward transverse movement of the slide block 448 with its Thrust washer 452 generated. This movement is required in order to the roll of wallpaper R backwards into the open foil tube I70 to push.

The stop bar 456 is in the direction of advance of the Product conveyor 36 arranged offset to the stop bar 454

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and inclined forward with respect to this feed direction. As a result is when the driver 4-60 with the stop bar 4-56 comes into engagement, with a further advance of the carrier 38, the slide block 4-4-8 with its thrust washer 4-52 withdrawn to the starting position in which the thrust washer 452 is in front of the position in which a roll of wallpaper R is promoted when this particular carrier runs back to the end of the machine.

This simple arrangement of top, firmly attached Stop bars, which cooperate to actuate a displaceable plunger of the carrier 38, is pushed back of the rolls to be wrapped R reached, whereupon the plunger returns to its original position.

At the end of the feed of the product conveyor 36, the wallpaper rolls R inserted by hand into the carrier troughs 34-6. Of course, this feed can also be carried out automatically afterwards a previous treatment of the wallpaper rolls take place. A carrier 38 of the product conveyor moves in the direction of the arrow of the line 4-0 in Pig «3 to the rear, so are rods 4-06, 4-08 and 4-10 of the finger opening gear 386 in the plane 10, which lies between the film webs 80 and 92 (see Fig. 2). This movement of the rods to their rearmost Position is possible because the film webs 80 and 92 in this position by the clamping points of their guide roller pairs 94- and run and therefore lie at a great distance from each other. The guide rollers 98 and 100 are also at such a distance

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from each other that the rods 406, 408 and * Ho between them hinduohkomraen, and the bars just run over the guide roller 100, but do not protrude below the guide roller 98.

My

During the subsequent movement of the carrier 38 in the general direction of advance indicated in FIG. 3 by the direction indicated in the line U-2. located part is identified, the rods U-06, * K) 8 and * Ho remain between the two film layers, which are now placed flat on top of one another by the support rollers 2 ^ 8 and 250 in the area of the film conveyor 18.

While the carrier 38 continues along the film conveyor 18 is running, the welding and cutting device described above is operated to produce the transverse welds and the double-lying film web on both sides of the Rods ^ K) O, 408 and * KLO to be provided with cross welds and cut through in the area of these welds so that a flat foil tube 170 is created in each case (see Fig. 6), the rods 4-06, 4-08 and 410 protrude into the front end.

When the carrier 38 moves in the direction of the arrow drawn in the line UrUr according to FIG. 3, the inclined guide hzG according to FIGS and 390, which rotates the finger opening gears 386 to their respective vertical actuation positions. The stationary rods 406 are in engagement with the lower web of film 92 and press the middle part of the web downwards against the film conveyor 20. The rods * K) 8 and

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come into their vertically raised positions when turning _; , but at the lateral and upper boundaries of the foil tube for contact, as shown in FIG. As soon as the front end of the foil tube is opened in this way, a roll of wallpaper H can be pushed into the foil tube. At the end of the machine and until the opening gear arrives at the film conveyor 20, the opening finger gear 386 remains in the closed position in which the opening fingers are essentially in a common plane and opening the pipe 170 which is formed and which is initially still lying flat.

The shafts 388 and 390 according to FIGS. 15, 16 and 23 are always rotated by a certain angle which is large enough to rotate the actuating plates 392 by an angle of more than 90 °, for example by an angle of I05 · When the Actuating plates 39 ^ are unhindered, they are rotated through an angle of 90 °, but mostly they are prevented by the foil tube I70 from coming into their fully open position. This is counterbalanced by the spring 396, which enables the plate 392 to be moved away from the plate 394. If the carrier were 38 then withdrawn forward in the oblique conveying in the direction of the portion 44 of the line of FIG. 3, it shall also Volienrohr I70 with the therein object R with, as the rods 404, 408 and 410 with corresponding friction, rest on the foil tube, moreover

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kl

232H57

causes simultaneously with the retraction of the carrier 38 / eLas slide gear that the roll of wallpaper H, which lies in the trough 3 ^ -6 of the carrier to be retracted, is also withdrawn, as indicated in FIG. 3 by the lines k5 and kf . As a result, the target E is pushed completely into the foil tube 170. In this area of the machine there is a locking effect between the film tube 170 and the roll of wallpaper R, which means that the film is pulled over the hulk. The rods * K) 6, 408 and 410 open only the front end of the foil tube 170, if this opening is large enough that the roll to be wrapped can easily be pushed into the open end of the foil tube, then the further pushing of the roll into the foil tube is easy to carry out, because the roll then opens the foil tube even if it penetrates further. Incidentally, the rods 4o6, * fO8 and 4-1Ό also act as guides for the roll R and prevent jamming between the rear end of the roll and the front end of the film tube, which would hinder the penetration of the roll into the film tube. Towards the end of the advance of the carrier 38 and after the plunger 452 has been withdrawn, the finger opening mechanism returns to the initial position of the fingers and can then easily be pulled out of the film tube 170, as shown in FIG. 3 is indicated at the right end. The finished pack, consisting of the film tube 170 and the roll of _{wallpaper R located therein, then continues through the shrink tunnel Zk 1} , the film being firmly shrunk onto the outer surface of the roll of wallpaper.

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At the same time, the protruding ends of the foil tube also shrink inwards, with the result that the packaging sleeve also shrinks at the ends the roll of wallpaper is closed »

If necessary, the machine could be equipped with additional welding devices that the ends of the foil tube 170 between pulling the opening fingers out of the Foil tube and the entry of the pack into the shrink tunnel close. This would be necessary, for example, if the item to be packaged requires a hermetically sealed seal would"

A modified opening device 500 is shown in FIG. 30 for the film tube shown, which instead of the finger opening gear 386 shown in Figo 15 and 20 to each of the Carrier 38 can be provided '.

This opening device has guide rods 502 and 50 ^, which are similar to the rods 33 * l · and 336 and with their rear ends sit in a holder 506, which is the head part 3 ^ 0 according to Figs. 15-21. With this arrangement however, the holder 506 has two upstanding legs 508 and 510, which are at such a distance from each other that therebetween there is sufficient space for the roll of wallpaper R to pass through.

A finger-operated slide 512 has drilled guide lugs for the passage of the guide rods 502 and SOU-, so that the slide 512 can slide in the longitudinal direction of the carrier 38, that is, in the direction of the arrows 51 * 4-. On the front side of the slide 512 there is a projection 516,

309 883/0376

_ 49 -

232H57

which is vertically penetrated by a pin 518. The pencil carries a cylindrical cam roller 520 at its lower end. This roller engages in a cam track 426 a (see Fig. 24), so that the movement of the slide 512 from the cam track 4-26 is controlled in the same way as the driving pin 420 in Fig. 15. At the opening device 500, however, the slide 512 does not serve to close a shaft rotate, eliminating the need for the guide pin 422 and the helical guide groove 418 according to Fig. 23.

Instead, the slide 512 has two vertical legs 522 and 524, each of which is provided with an outwardly protruding pin. These pins are rotatably mounted in an associated hole and lead a round rod 528 on each side. The rear end of the fiundstange 528 extends through a pin 530 of a lever arm 532 ^ - a lifting bracket 534, which is connected to the legs 508 and 510 of the coaxial pins 536 head body is mounted 506 * the pin 530 is ii with the rod 528 and riveted so that any longitudinal movement of the Rundstang3 is transmitted to the Huobügel 534,523. A collar or a cylindrical clamping body 53 >> is attached to the round target% e 520, e.g. 3. with a maggot.ic.hr ιπ ^τ · β, not shown, and there is one sitting on the round rod 528

ciei * j'h> supported. If the slide 512 moves through the cam roller 520 in the "ine"; / assigned cam ¹ Wb also at the rear, the movement is transmitted via the pin 526 and the rod 52t3 to the lifting bracket 534, the

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then at a corresponding angle around its pivot axes;. is rotated 536. "This upward pivoting of the lifting bracket 53 ** is accompanied by a rotation of the pin 526 about its own axis with respect to the legs 522 and 52 ^. The linear distance ^ with which the pin 526 can be moved from the slide 512 is through determines the shape of the cam track k-Ζβ that causes this linear movement. On the other hand, the angle through which the lifting bracket can be pivoted is limited by the size of the foil tube that is to be opened Upward movement comes to a standstill, further backward movement of the pin 526 is made possible by the fact that the pin 526 slides on the dog bar 528, compressing the spring 5 ^ 0. When the slide 512 moves back, the spring 5 ^ 0 expands and brings the pin 526 back into its starting position with respect to the round rod 528 before the lifting bracket 53 ^ goes down.

The lifting bracket 53 ^ has a central bridge part with a head arch 5 ^ 2, the radius of which is large enough that a roll of wallpaper B can pass through. This head arch sits on lateral arms S ^ k- , which are angled outwards by; Ends 5k6 connected to the pivot levers 532 slni. The Truger yS also has two fixed rods 5 ^ 8, which roughly correspond to the rods 4o6 of the finger opening gear described above.

In the normal inoperative position, the lifting pin takes place the position shown in Fig. 30, in which his head ^

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curve 5 ^ 2 lies in the same plane as the rods. In this position of the lifting handle it is possible for the rear part of the rods 5 ^ 8 and the lifting handle 53 to penetrate between the film webs 80 and 92 at the feed end of the machine. When a flat film tube 170 has been produced by the welding and cutting head, the parts are in the position according to FIG. 30. In this position the slide 512 is moved backwards, and this has the consequence that the curved part 5 ^ 2 of the lifting handle lifts the upper part of the not yet opened foil tube 170 from the lower part, which is held down by the rods ^ Q , and the cranked parts 5bk of the lifting handle hold the sides of the foil tube open. The viewer 512 can then insert the roll of wallpaper H into the foil tube at the same time as the carrier 38 is withdrawn forwards, as was described for the embodiment previously described.

With the lifting bracket 53 ^ the foil tube 170 can be opened particularly effectively, the cranked parts 5 ^ of the bracket still being inclined backwards and upwards so that the lifting bracket grips the foil tube 170 very tightly and it is highly unlikely that the foil tube can slide off the rods 5 ^ 8 and from the hoof stirrup 53 ^ when the roll of wallpaper R 'is introduced. _:

A similar machine can also be used for processing from the center folded foil can be used, so that only one foil

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train is needed. The opening must then of course at the the film edge opposite the fold, when the film web is at the feed end of the machine, thus the opening device for the foil tube, which is the embodiment according to FIGS. 15 and 20 or the embodiment according to Fig. 30 may correspond, between the two layers of the folding film can penetrate. Once that's done, the two layers of the folding foil placed on top of each other in order to rapidly cross-weld and sever the foil web to effect the film conveyor 18 and the feed shoe 172 as previously described.

Of course, it is desirable to use two sheets of film of the same width. However, it is also possible to use foil webs Can be used in different widths, provided the opening device for the film tube can be introduced between the two film webs.

Of course it is possible to use the machine according to the invention can also be used for packing items other than wallpaper rolls, although certain modifications are then required. 'Should, for example, be a non-cylindrical object If you receive a packaging sleeve made of foil, it may be necessary to use a different product conveyor than the one according to Fig. 15-20. In some cases, the carrier for the objects to be packaged aix a flat bed with upwards have protruding, vertical guide walls. In a modified one Execution can be cycled for packing or wrapping

30 9 8 83/0376

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Lindrische objects the hollow of the carrier for the wrapping Objects are replaced by two parallel, cylindrical rods on which the object to be packaged rests. This arrangement makes it possible to actuate the slide or plunger by means of stationary cams that are below the upper run of the product conveyor 36 are arranged, the connection between the cam roller and the slide or ram can be passed through the gap between the two rods. Shall non-cylindrical objects are wrapped, the arrangement of the opening gear for the film tube must also be changed.

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Claims (1)

Claims: n 1.! Process for the production of foil packs from double-layer Flat film for elongated objects to be wrapped, e.g. wallpaper rolls, in which the flat film along a transverse is conveyed horizontally to the objects to be wrapped conveyor track, characterized in that the Double film at points one behind the other in the conveying direction by means of linear connections that are perpendicular to it is divided into flat, double-layered partial areas and the partial areas then by spreading apart at least one end can be opened to form a foil tube. 2. The method according to claim 1, characterized in that the two film layers made of thermoplastic plastic film exist and through welds lying transversely to the conveying direction get connected. 3. Method according to claim 1 or 2, characterized in that that the double-layer plastic film along each linear cross-connection to separate the between two cross-connections lying section made of double film from the previous section and from the subsequent film web is cut through. , ^. Method according to claim 3 »characterized in that the separating cuts are made by applying heat. 5. The method according to claim 2, 3 or ^, characterized in that that the two layers of film lying flat on top of one another are conveyed horizontally, with over the entire width of the film - 309883/0376 lay reaching, at a distance from each other transverse verse welds provided, stretched in the longitudinal direction of the transverse welds and in. successive, elongated Plach pieces are cut up, which 'one then opens to form a tubular packing envelope. 6. The method according to one of claims 1-5, characterized in that before the linear cross-connection is established between the film layers, a pipe opening device is inserted between the adjacent film layers and, after the linear cross-connections have been made, is actuated to open the double-layer flat piece located between them . 7. The method according to claim 6, characterized in that the tube opening device consists of a device that is inserted into the double film in the collapsed state and by his * actuation to open the tube in an upright position State is brought. 8. The method according to claim 6, characterized in that the tube opening device consists of a nozzle, which is between introduced the film layers and by introducing gas or air into the flat pieces of film to open the Packing sleeve is used. . . 9. The method according to any one of claims 6-8, characterized in, that the tube opening device is inserted between the film layers and together when conveying the double film is promoted with them to the opening area. 303883/0376 232K57 10. The method according to any one of claims 1-9 »thereby characterized in that the object to be packaged by a The end of the opened tube is pushed into the foil envelope. 11. The method according to claim 10, characterized that the tubular packing sleeve while conveying the double film and the objects to be packaged on side by side at the same time lying webs is pushed sideways over the conveyed object. 12. The method according to claim 10 or 11 »· characterized in that that the object to be packaged is on its own conveyance and when conveyed ®i * double film on side by side lying conveyor tracks is pushed laterally into the previously opened foil tube. . 13 · Method according to one of claims 10 - 12, characterized characterized in that the containing the article to be packaged Foil tube is subjected to a heat shrink treatment. Ik. Machine for carrying out the method according to claim 1, characterized in that the machine has a carrying device for supplying two layers of plastic lying on top of one another, guiding means for bringing together and conveying the two layers of film lying on top of one another, a welding device for connecting the two layers of plastic has linear layers through transverse welds at points one behind the other in the conveying direction and a device for opening the film point initially lying flat between two transverse welds. 309883/0376 - 57 - 232H57 15. Machine according to claim 3Λ, characterized in that that the support frame of the machine has a holder for two separate Polien supply rolls and guide devices for bringing them together the withdrawn from the two supply rolls film webs such that they are on a common Continue hiking on the horizontal conveyor line lying on top of one another. 16. Machine according to one of claims I ^ or 15 »thereby characterized in that the device for opening the produced by parallel cross connections and separating cuts, elongated flat pieces of double foil between the Foil layers on a front of the welding head for the production of the Cross welds are introduced. 17 · Machine according to claim 16, characterized in that the device for opening the foil tubes is conveyed together with the foil webs and after the transverse welds have been produced is actuated to open the foil tubes « 18. Machine according to one of claims I ^ -17 > characterized in that the machine has devices for producing a relative transverse displacement between the open end of the film tube and the object to be introduced therein. 19. Machine according to claim 18, characterized in that the machine has an arranged next to the film conveyor, has in the same direction driven conveyor for the objects to be packaged. 20. Machine according to claims I7 and 19, characterized in that 309883/0376 indicates that the devices for opening the foil tubes on the conveyor driven in the same direction for the items to be packed are arranged. 21. Machine according to claim 20, characterized in that the Hohröffnungsvorrichtung by the movement of Conveyor .for the items to be packed is actuated. 22. Machine according to claim 21, characterized in that that the Hohröffnungsvorrichtung with an actuating gear is provided that when promoting the Hohröffnungsvorrtehtung comes into engagement with a stationary cam or a cam guide on the conveyor of the objects to be wrapped « 23 · machine daduroh according to claim 2.2 ₁ that the Rohröffnungsvorriohtung Einan or mshrere with the film tube-engaging Teil® aiifweist _s di © in collapsed ^ state in a zw substantially ebenen'Fläche & sohen lie together the two film webs and so articulated are _s that when you actuate them, they come from the folded position into an upright or »apart position. 2k. Machine according to claim 23 »daduroh characterized ^; that the tube opening device has a member pivotably mounted about associated pins? that by pivoting from the folded down into the upright position locks and thereby a straight movement © ines engagement hooks Il into a rotary movement of the opening fingers grasping the foil tube implements " 109883/0378 25 · Machine according to one of claims 19-2 ^, characterized markedj that the conveyor for the to be wrapped Articles comprises a plurality of the latter receiving carriers, which with respect to the conveying path of the double foils are reciprocable in the lateral direction. 26. Machine according to claim 25s, characterized in that that each carrier for the objects to be wrapped has a curl-controlled driver, which is used when moving of the carrier through its conveyor with a fixed control hook Comes into engagement and causes the lateral movement of the wearer, 27 · Machine according to claims 16 and 26 _9, characterized in that the hole opening device is arranged on the supports of the conveyor for the objects to be wrapped. 28. Machine according to one of claims 2H - 27 s, characterized in that dta with the Fölienyeto * engaging opening device has a bracket, d © r axis parallel to the conveyor belt and the objects to be wrapped is pivoted. 29 · Machine according to one of the claims © Ib - 28 _B dadurah. · Characterized9 that the welding device has a welding head with a gear for producing the cross welds, so that the welding head moves back and forth parallel to the film conveyor track and also allows it to carry out the cross welds across it. 309883/0376 Agility of the film webs set in back and forth movements » 30 ₀ machine according to claim 29 »characterized in that" the welding head gear has a vibration generator which can be adjusted to variable stroke lengths and which operates with an oscillation period which is directly dependent on the conveying speed of the film webs. 31. Machine according to claim 30 »characterized in that that the vibration generator has a two-armed lever, the lever pivot point with respect to the length of at least one Lever arm adjustable 1st. 32o machine * according to one of claims 29 - 31> characterized in that the machine has a foil conveyor, which advances the film webs through the working area of the welding head, and that the welding head is in this area is supported by a feed slide that is on has orte film webs rolling support rollers and the Presses the film webs against the film conveyor. 33 · Machine according to "Claim 32, characterized in that that the feed slide has a visible indicator that is synchronized with the pressure rollers of the feed slide is agile and shows its running speed. 3 ^ · Machine according to one of claims 29-33, characterized characterized in that the machine has a cam driven synchronously with the film conveyor for pressing down the welding head against a cushioned load that the 309883/037 6 . · / "■ -... ■ ■■. '■■ - 232U57 Holds welding head with the film web in engagement. ' 35 · Machine according to one of claims 32-3 ^ »thereby characterized in that the welding head has at least one support roller which at the end of the movement of the welding head supporting feed carriage receives a sudden rotation in the feed direction of the film webs to the Foil tube to demand accelerated from the following part of the foil webs. 36. Machine according to claim 35ι, characterized in that that the aforementioned support roller is coupled to a gearwheel by a coupling effective in only one direction of rotation, the 12 "a rack that goes up and down with the welding head" is engaged in such a way that the additional rotation on the support roller only when the welding head is lifted off is transferred to the film webs. 37 ° machine according to one of claims 25-36, characterized characterized in that, each carrier for the objects to be wrapped has a slide or plunger which has a lateral movement for pushing over the object to be wrapped executes from its carrier into a foil tube arranged for it, with an actuating gear assigned to the slide or plunger is that the drive as a function of the feed speed of the conveyor for the objects to be wrapped causes. 38. Machine according to one of claims Ik - 37 »thereby being 309883/0376 indicates that the machine has a heat shrink tunnel and a conveyor for forwarding the wrapped. Has objects in the shrink tunnel. 309883/037 6 to Blank page