SE535972C2 - Apparatus and method of packing goods in an inflatable bag - Google Patents

Description

535 972 2 seen with channels or carrier tubes in or on which the packaging blank slides. The bag-shaped parts slide along the carrier arms for opening, filling, closing and separating into individual packages filled with contents. The publication shows that the packaging blank is designed with upper edge parts provided with thickenings which are intended to slide in each of the channels in the carrier arms which are located parallel in relation to each other. In a filling area, the carriers bend away from each other and form a larger space between them, whereby the composite shaped parts are opened and filling can take place. After the bag-shaped parts have passed this filling area, the distance between the support arms decreases again, whereby a finishing in the form of closure, separation and release from the support arms takes over.

Furthermore, patent specification SE 525 741 (WO 2005/023693) discloses a method and a device for producing a continuous edge thickening along the running direction of a stretched and tensioned web of a forcibly and permanently transported thermoplastic film. The thickening according to this patent is achieved by folding edge parts of the plastic film and welding them to a final state for the use of the plastic film as packaging, etc. in a packaging machine according to a previously known type, e.g. WO 021083506.

These methods and devices shown for producing a package do not offer a package which has a shock-absorbing effect on goods packaged in such a manner.

Purpose of the invention The purpose of the invention is to simplify the handling and packaging of products that require a shockproof packaging.

The object of the present invention is to provide a blank in the form of inflatable bag-shaped packages and a device and a method which use such blankets in packing products.

The purpose of the substance is also to offer a simplified handling of packaging that can offer products packaging protection with the help of gas-filled pillows.

The purpose of the device is also to obtain an automatic packaging process where the packaging is provided with a number of shock-absorbing gas fillings. Summary of the Invention By the present invention, as set forth in the independent claims, the above objects are met in which said drawbacks have been eliminated. Suitable embodiments of the invention are set out in the dependent claims.

The invention includes bag blanks formed from packaging blanks to become cohesive bags. The walls of each bag have two layers of foil which are welded together in such a way that a number of corners are formed between the bottom of the bag and edge welds. These bags are then filled with gas / air, after the bag has been filled with the respective product. Either the packaging blank or the bag blank is supplemented with a suspension device, for example a so-called bag straps with thickenings.

The material in the suspension device / packaging blank can consist of different plastics and different layers of m ch. Antistatic film is an example.

Being able to deliver blanks to a potential customer without gas inclusions means great delivery advantages of the blister. Cheaper transport, less storage space and also the possibility to easily and smoothly package products that require shock protection in some standard packaging machines.

The suspension device, for example the thickenings of the bag strap, is inserted into a pair of support and opening arms, in a manner previously known. The arms open up a row of bags for filling. The filled bags move further along the arms to an additional equipment whose task is to blow air into the holes that are welded between the material of the bag walls. The bag and air pockets are closed using a welding device in the packaging machine.

The invention is arranged to handle all types of “bubble bags” that are attached to long straps and then also bags that are controlled by chains with holes and spikes or that are held in place with friction.

The equipment for inflating the "bubbles" consists of a separate compressor or that the equipment can be connected to a flexible compressed air network.The equipment is also equipped with a device that seals the bag's path to the friction straps of the bag machine.

Furthermore, the invention comprises a gas divider, in another embodiment of the invention, which has the task of guiding the inner film edges in a manner which seals against the air flow. This control is designed to minimize the air that escapes into the short ends of the bag. When the air is forced into the bubble metal chambers, it is important that we close the chambers so that no air leaks out on the way into the friction belts.

The invention comprises a blank made as an inflatable packaging blank on a continuous path where the packaging blank comprises a first flat plastic foil and a second flat plastic foil which plastic foils with their flat surfaces abut each other and are connected to each other by welds so that a series of welds bounded transverse chambers are formed between the two plastic foils over its entire surface. This semi-finished product is folded or welded or welded and folded along a longitudinal center line which defines either the top of the blank or the bottom of the blank. The two long sides of the blank are parallel and face in the same direction, a first longitudinal suspension device being applied at the edge along the first long side of the semi-finished product and a second longitudinal hanging device being applied at the edge along the second long side of the semi-finished product. These suspension devices can be applied to the semi-finished product before folding / welding or after folding / welding. The suspension devices can be designed as material strands with a thickness of 2 mm at a preferred foil thickness l in an interval of 25 - 250 μm. Semi-finished products are also provided with transverse welds of a length terminated some distance from the longitudinal suspension devices when the semi-finished product is welded. This inflatable packaging blank is particularly suitable for use in packaging materials which pack goods in bags on a continuous packaging path. It is also possible to supplement inconvenient packaging machines to be able to handle even these inflatable blanks on a continuous path in order to obtain an automated packaging with gas-filled packaging around sensitive goods.

In a bag which is handled by a device or a method according to the invention, each suspension device consists of a thickening which is connected to the one outermost, the plastic foil at the respective longitudinal side. In a blank which is handled by a device or a method according to the invention, each suspension device consists of a thickening which is connected to both plastic foils at the respective long side. In a bag which is handled by a device or a method according to the invention, each suspension device consists of a channel. A bag material which is handled by a device or a method according to the invention is provided with gas filling channels.

In a bag blank which is handled by a device or a method according to the invention, the transverse welding is terminated next to the suspension devices with either a hole punching or a short longitudinal welding.

The invention relates to a device for packaging, which device comprises two guide arms provided with holding means. The holding means are designed either as channels in which a bag blank can slide or as tubular support rails on which a bag blank can slide depending on whether the bag blank is provided with thickenings or channels. Thus, the holding means are arranged to hold up a coherent blank. The guide arms are thus designed with sliding grooves or slide rails for the bag blank to slide on or in. The guide arms run parallel close to each other but are also arranged to widen from each other so that the bag blank can be opened and filled at a filling area. that the blank can be sealed at a sealing area.

Specifically, the device is provided with at least one gas filling nozzle formed with outflow holes directed towards the blank. The gas filling nozzle is mounted and integrated in the device so that the gas filling takes place continuously when a bag blank adapted for gas filling passes the gas filling nozzle. This gas filling nozzle is suitably adapted to the type of blank to be filled. In an embodiment of a device according to the invention, the gas filling nozzle is designed as a cylindrical pin oriented parallel to the holding means.

The outflow holes of the gas filling nozzle are located on the periphery of the cylindrical pin for an outflow direction perpendicular to the direction of the cylindrical pin.

Such a designed gas filling nozzle is suitable when using the blanks provided with gas filling channels which slide over the gas filling nozzle and can gas-fill chambers in the side part of the blank. Suitable embodiments are also to arrange double gas filling nozzles placed in parallel, which together fill the chambers of both sides in the bag blank. This type of gas filling nozzle is suitable both for bag blanks with thickeners and partly for bag blanks with channels as suspension means, but where these suspension means join both plastic foils at the respective side. In an embodiment of a device according to the invention, the gas filling nozzle is provided with an externally placed seal intended to seal between the gas filling nozzle and a gas filling channel arranged in the blank. This seal reduces gas consumption because gas does not seep out of the gas filling duct as it slides over the gas filling nozzle.

In an embodiment of a device according to the invention, a knife blade is mounted at the gas filling nozzle for cutting up the gas filling channel when the blank passes. The knife blade is preferably directed perpendicular to the direction of the gas filling nozzle. This placement of the knife blade is both simple and cost-effective, even if it would be conceivable to place the knife blade in other ways.

In an embodiment of a device according to the invention, the gas filling nozzle is formed with a gas divider which is arranged to distribute filling gas to openings in chambers formed in the blank. This gas filling nozzle is designed to jointly and simultaneously fill the gas filling channels arranged in the blank, as the blank is designed with suspension means which are connected only to the outermost foil in the blank. The gas divider makes it possible to fill gas between the outermost foil and the free edge of the adjacent foil in order to simultaneously fill the chambers of the two sides in the blank from one and the same gas source. This embodiment is shown in more detail in Figures 3 and 6 and Figures 10a-c and 11a-c.

In an embodiment of a device according to the invention, nip rollers are arranged in connection with the gas filling nozzle to block the openings to the chambers of the blank to prevent premature gas filling thereof. The advantage of these nip rolls is that they only allow the chambers to be filled when they reach the gas filling nozzle so that an uncontrolled early filling does not take place, which would mean that the sides of the blank for the chamber of your bag parts are widened before they reach the gas filling nozzle.

In an embodiment of a device according to the invention, the device is provided with a press device and a welding device which are placed so that they are passed by the blank after it has passed the gas filling nozzle. The press device is arranged to compress the openings of the chambers after gas filling and keep the openings compressed while the blank with the gas-filled chambers passes said welding device which closes the blank with the chambers in the sealing area and forms continuous bag-shaped packages. The advantage of the press device is to keep the chambers sufficiently gas-filled until the blanks and thus the chambers have been closed.

In an embodiment of a device according to the invention, a compressor and / or a pressure vessel is connected to the gas filling nozzle via gas lines. A compressor can maintain a continuous filling pressure for the chamber of the blank. With a pressure vessel, the filling pressure can be regulated more precisely than with just one compressor.

The pressure vessel can in combination with a compressor function as a pressure accumulator which can carefully regulate the filling pressure through the outflow hole of the gas filling nozzle.

In addition, the invention relates to a procedure for packaging goods in a coherent substance. The blank is designed to slide on or in guide arms and is designed according to any of the above-indicated embodiments of blank.

This blank is fed to a gas filling nozzle which presses gas through openings into chambers formed in the bag blank, after which the chambers and the blank are welded together into sealed packages. Thus, the method is adapted for said embodiments of blank in combination with said embodiments of packaging device.

In one embodiment of the procedure for packaging goods, the openings of the chambers are compressed after the gas filling and are kept compressed until welding has taken place. This eliminates gas leaking from the chambers, which would mean less shock-absorbing packaging.

In one embodiment of the procedure for packaging goods, the openings to the chambers are pressed together before the gas filling is to take place in order to prevent a premature gas filling. This method enables a controlled filling of the chambers which can be observed directly by observing the filling area of the packaging device.

The starting product for the bag blank according to the invention is made of a plastic film, preferably of, for example, polyethylene, where the plastic film is provided with double layers between which chambers are arranged. This starter product is delivered by the meter in rolls of the specified length. The starting product is then refined into a substance according to the invention.

The device is designed to handle all weldable plastic films and laminates and also foils of plastic-coated aluminum and foils of plastic-coated paper etc. 535 972 Brief description of the drawings The invention will now be described in more detail with references in connection with the accompanying drawings. The drawings show only principle sketches 5 intended to facilitate the understanding of the invention.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8a Figure eb Figure 8c Figure 9a Figure 9b Figure 9c Figure 10a shows an embodiment of a packaging blank and a bag blank according to the present invention. shows a section through a second embodiment of a bag blank mounted in holding means according to the invention. shows a section through a third embodiment of a bag blank mounted in holding means according to the invention. shows a section through a fourth embodiment of a blank mounted on holding means according to the invention. shows a section through a fifth embodiment of a bag mounted on holding means according to the invention. schematically shows a top view of a device according to a device according to the present invention. shows schematically a side view of the device according to fi figure 6. shows a section A - A according to fi figure 7 of the second embodiment according to fi figure 2. shows a section B - B according to figure 7 of the second embodiment according to figure 2. shows a section C - C according to figure 7 of the second embodiment according to fi figure 2. shows a section A - A according to figure 7 of the fourth embodiment according to fi figure 4. shows a section B - B according to fi figure 7 of the fourth embodiment The arrangement according to Figure 4 shows a section C - C according to Figure 7 of the fourth embodiment according to Figure 4. shows a section A - A according to Figure 7 of the third embodiment according to Figure 3. Figure 5b shows a section B - B according to fi figure 7 of the third embodiment according to fi figure 3.

Figure 10c shows a section C - C according to Figure 7 of the third embodiment according to Figure 3.

Figure 11a shows a section A - A according to fi figure 7 of the fifth embodiment according to fi figure 5.

Figure 11b shows a section B - B according to Figure 7 of the fifth embodiment according to Figure 5.

Figure 11c shows a section C - C according to fi figure 7 of the fifth embodiment according to fi figure 5.

Figure 12 shows a bottom view of an enlarged part from Figure 6.

Figure 13 shows an enlarged part of Figure 7.

Description of the invention Figure 1 shows an inflatable packaging blank 11 which is delivered on a continuous track. The packaging blank has a width corresponding to double the depth of bags 12 in a bag blank 13. The packaging blank 11 is folded along a center line 14, the suspension devices 15 for the edges of the bag facing in the same direction. The suspension devices are either connected to the packaging blank before folding takes place or are connected after folding has taken place. The figure shows that the suspension devices have been connected before folding and perhaps even during the manufacture of the packaging blank 11. The packaging blank is provided with delimited transverse chambers 16 distributed over its entire surface. The chambers are provided with inlet openings 17 through which gas, usually air, can be introduced into the chambers 16.

The chambers have been formed by welds 18 joining surfaces of two opposite plastic foils. The bag blank further avoids being provided with transverse through-welds 19 which end a distance from the longitudinal suspension devices 15 with either a hole-through weld 20 or a slot-through weld directed parallel to the suspension devices 15. The bags 12 formed in the hanger blanks 13 are thus coherent.

Figures 2-5 show sections through four different embodiments of packaging blanks where Figure 2 shows a bag blank 13 with a first flat plastic foil 21 connected to a second flat plastic foil 22 which plastic foils with their flat surfaces abut each other and are connected to the welds 18 so that chamber 16 is blended between the welds. The entire double plastic foil with its two plastic foils is folded to form a boundary A, which can be either the bottom of a bag or the top of a bag. The folding can also consist of a welding of all four foil layers, ie. the double foil layers on both sides. The figure also shows that the suspension devices are designed as two thickenings 23a, 23b, each connected to and joining the two plastic foil layers on each side of the bag blank 13 so that gas cannot penetrate through the suspension devices. The figure also shows that the thickenings 23a, 23b of the suspension devices run in support channels as holding means 24 in each guide arm 25. The bag blank 13 thus slides in these guide arms in a packaging machine where the bags are filled, closed and separated into individual packages.

Figure 3 shows a similar blank 13 where the only difference from that shown in Figure 2 is that the suspension devices 23a, 23b, each are connected only to the first plastic foil 21, the edges of the second plastic foil 22 being free.

In this embodiment, gas is allowed to be forced into the chambers 16 from a space 31 between the two guide arms 251, 252. Figure 3 shows that the suspension devices according to this embodiment are also designed as thickenings which run in support channels as holding means in each guide arm according to shown in Figure 2.

Figure 4 shows a similar blank 13 as previously shown, but where the suspension devices are designed as channels 43a, 43b either connected to or formed by the first foil 21 and the second foil 22. In the embodiment shown, the respective channel 43a is , 43b thus connected to both foils 21, 22. Both channels of the bag blank 13 slide on tubular guide arms 41, 42 in a packaging machine where the bags are filled, closed and separated into individual packages as previously described. In this embodiment, the guide arms also function as holding means in the form of slide rails on which the bag blanks run.

Figure 5 again shows a similar blank 13 as previously shown where the suspension devices are designed as channels 43a, 43b which are connected or formed by only the first plastic foil 21, the edges of the second plastic foil 22 being free. The supply of gas to the chambers 16 takes place in the same manner as indicated in connection with Figure 3.

Figure 6 shows the principle of a packaging device 60 according to the present invention. The device comprises two guide arms 61, 62 provided with or designed as holding means arranged to hold up a continuous package blank 13. The guide arms 61, 62 are in the embodiment shown formed with sliding grooves or sliding rails for the packaging blank to slide in or on in the direction indicated by the arrow in the clock. The guide arms 61, 62 are arranged to widen apart at a filling area 63 so that the packaging blank is opened and filled with products 64. After the filling area, the guide arms again run parallel to each other until a gas filling area 65 where gas / air is filled in the previously described chambers in the packaging material. Furthermore, the packaging blank slides to a sealing area where the bags 12 of the packaging blank are closed when they pass welding jaws 66. In the embodiment shown, toothed belts 67, 68 are arranged which first pull / feed forward and compress the cohesive bags of the packaging blank by abutting the toothed belts. The blank blank 13 shown is provided with a longitudinal welding 61 which terminates the transverse welding 19 of the blank.

Figure 7 shows a side view of the device in Figure 6. The continuous blanks 13 are fed from a magazine 71 where they are laid, ie. folded. From this magazine they are fed along the guide arms 61, 62 of the packaging device 60 in the direction of the arrow via the filling area 63 to a gas filling area 72. The guide arms are shown only a short distance in the fi. In the gas filling area 72, the device 60 is provided with at least one gas filling nozzle 73 formed with outflow holes 74 directed towards the blanks 13. As indicated in the uren, gas 75 is pressed in the direction of the arrow into said chamber 16 which has only been schematically drawn as circles in the uren. After gas has been forced into the chambers, these are temporarily closed by the toothed belts 67, 68 until the chambers are permanently closed by the blanks 13 passing the welding jaws 66 where both the chambers and the rest of the blanks are welded together. The embodiments also show suspension devices 23 in the form of thickenings running in support channels as holding means in each guide arm 61, 62 according to the suspension principle shown in Figures 2 and 3. Of course, the suspension principle of the blanks according to Figures 4 and 5 can also be applied to Figure 7. Furthermore, Figure 7 shows that the device is provided with a rotating reindeer knife 76 which separates the waste strip 77 from the suspension device from the bags. In addition, a duct knives 78 are mounted on the gas filling nozzles to slot open the gas filling channels in which the gas filling nozzles slide. In the following, the four embodiments shown in Figures 2-5 will be shown in sections taken in different positions as indicated in Figure 6. Figures 8a-8c show the embodiment according to Figure 2; Figures 9a-9c show the embodiment according to Figure 4; Figures 10a-10c show the embodiment according to Figure 3 and Figures 11a-11c show the embodiment according to Figure 5.

Figure 8a shows the bag blank 13 as it has passed the filling area where a product 64 has been stuffed into the bag whose chambers 16 have not yet been filled with gas / air. The bag with the product and its suspension devices slide further in the respective carrying channel up to the position shown in Figure 8b, ie. as the bag blank 13 slides past the two gas filling nozzles of the device, the gas pipes 731, 732 of which are shown in the fi gure. The gas filling nozzles have in this case slid into their respective gas filling ducts 81, 82 in the bag blank 13. As can be seen from the bag, the bag 16 of the bag bag has been filled with gas after passing the gas filling nozzles so that protective gas cushions have formed around the packaged product 64. After the chambers have gas-filled and the openings to the chambers have been compressed, the bag blank passes the previously mentioned duct knives which cut open the gas-filling channels so that the bag net can pass past the pipelines. The blank further slides past the said rotary reindeer knife which separates the waste strip from the suspension device to the position shown in Figure 8c. In this position, the welding jaws 661, 662 will close the entire side of the bag blank, and thus also the openings of the gas ducts. During the entire transport of the bag blank from the position in B gur Bb until welding has taken place, the bag blank's opening has been closed by the toothed belts 67, 68 which are pressed against each other around the bag blank. After the passage of the welding jaws, the bag blank has resulted in separate bag packages where a fragile product 64 has been packed with surrounding gas inclusions. As shown in Figure 8c, the short side of the product 64 has also been protected with a gas containment 83.

Figure 9a shows the bag blank 13 of a further embodiment when it has passed the filling area where a product 64 has been stuffed into the bag whose chambers 16 have not yet been filled with gas / air. The bag with the product and its suspension devices which in this embodiment are designed as channels 43 slide further on the respective tubular guide arms up to the position shown in Figure 9b, i.e. when the bag blank 13 has slipped past the two gas filling nozzles of the device, the gas pipes 731, 732 of which are shown in the gas. The gas filling nozzles have in this case slid into their respective gas filling channels 81, 82 in the bag blank 13. As can be seen from the bag, the chamber 16 of the bag bag has been filled with gas after passage of the gas filling nozzles so that protective gas cushions have formed around the packaged product 64. After the chambers have been gas-filled and the openings to the chambers have been compressed, the blank passes the aforementioned channel knives which cut the gas-filling channels so that the blank can pass the pipelines to the gas pipes 731, 732. which separates the waste strip from the suspension device to the position shown in Figure 9c. In this position, the welding jaws 661, 662 will close the entire side of the blank, and thus also the openings of the gas ducts. During the entire transport of the blank from the position in Figure 9b until welding has taken place, the opening of the blank has been closed by the toothed belts 67. 68 which are pressed against each other around the blank. After the passage of the welding jaws, the blank has resulted in separate bag packages where a delicate product 64 has been packed with surrounding gas inclusions. As shown in Figure 9c, the short side of the product 64 has also been protected with a gas enclosure 83.

Figure 10a shows the blank 13 of a further embodiment when it has passed the filling area where a product 64 has been stuffed into the bag whose chambers 16 have not yet been filled with gas / air. The bag with the product and its suspension devices slide further in the respective carrying channel up to the position shown in Figure 10b, ie. when the blank 13 has slid to the gas filling nozzle of the device, the gas pipe 100 of which is shown in the fi. The gas pipe presses gas / air down between the first plastic foil and the free edge of the second plastic foil on both sides of the blank by means of a foil divider 101 arranged to support the free foil edges. In this case, the chambers 16 of the bag are gas-filled with gas / air so that protective gas cushions are formed around the packaged product 64. After the chambers have been gas-filled and the openings to the chambers have been compressed, the said blank slides further past mode shown in Figure 10c. In this position, the welding jaws 661, 662 will close the entire side of the blank, and thus also the openings of the gas ducts. During the entire transport of the blank from the position in Figure 10b until welding has taken place, the opening of the blank has been closed by the toothed belts 67, 68 which are pressed against each other around the blank. After the passage of the welding jaws, the blank has resulted in separate bag packages where a delicate product 64 has been packed with surrounding gas inclusions. As can be seen from Figure 10c, the short side of the product 64 has also been protected with a gas containment 83. Figure 11a shows the blank 13 of a further embodiment as it has passed the filling area where a product 64 has been tucked into the bag whose chambers 16 are still has not been filled with gas / air. The bag with the product and its suspension devices which in this embodiment are designed as channels 43 slide further on the respective tubular guide arms up to the position shown in Figure 11b, i.e. when the blank 13 has slid to the gas filling nozzle of the device, the gas pipe 100 of which is shown in the figure. The gas pipe presses gas / air down between the first plastic foil and the free edge of the second plastic foil on both sides of the blank by means of a foil divider 101 arranged to support the free foil edges. In this case, the chambers 16 of the bag are gas-filled with gas air so that protective gas cushions are formed around the packaged product 64. After the chambers have been gas-filled and the openings of the chambers have been compressed, the blank slides further past the said rotating reindeer knife. to the position shown in Figure 11c. In this position, the welding jaws 661, 662 will close the entire side of the blank, and thus also the openings of the gas ducts. During the entire transport of the blank from the position in Figure 11b until welding has taken place, the opening of the blank has been closed by the toothed belts 67, 68 which are pressed against each other around the blank. After the passage of the welding jaws, the blank has resulted in separate bag packages where a delicate product 64 has been packed with surrounding gas inclusions. As shown in Figure 11c, the short side of the product 64 has also been protected with a gas containment 83.

Figure 12 shows an enlarged view from the underside of the device at the gas filling area 65 where the thickenings 23a, 23b of the blank which hold and join the two plastic foil layers on each side of the blank are schematically shown.

Each thickening with its double foils passes an outer nip roller 121 and an inner nip roller 122 which nip rollers abut each other so that the blank channels are compressed and prevented from being gas-filled before they reach the respective gas-filling nozzle 73 with its outflow hole 74. As shown in the nip rolls and gas filling nozzles doubled to handle both sides of the blank. The gas filling nozzles 73 are designed as a cylindrical pin which is horizontally oriented parallel to the holding means and terminates with a tapered rounded shape so that the nozzles can easily slide in the respective gas filling channel in the blank. As can be seen from the clock, the outflow holes 74 of the nozzles are shaped rectangular and with a length corresponding to 3-5 times its width. The outflow holes are designed to obtain an outflow direction perpendicular to the direction of the cylindrical pin. Each gas filling nozzle is connected to at least one gas pipe 731, 732 which is connected to a compressor and / or gas accumulator, not shown, for the gas supply of the nozzles. After gas has been forced into the chambers of the blank through its inlet openings, these are compressed by passing between the toothed belts 67, 68 so that gas does not leak out of the chambers. The blank with the continuous bags passes the rotating reindeer knife 76 which removes the blank's suspension devices, gas filling channels and a part of the inlet openings to form separate bags. Furthermore, the bags pass the welding jaws 661, 662 in a sealing area 120 where the bags are sealed by being welded together, the packages being completed.

Figure 13 shows a schematic side view of the gas filling area 65 where a bag blank 13 has been fed to a filling position where the gas filling channel 82 of the bag is compressed by the nip rollers 121 to prevent gas supply to chambers 16 other than those currently located at the gas filling nozzle. say that gas flows to the left in the gas filling channel 82 in the fi gure. Mounted around the gas filling nozzle 73 is a gas seal 131 which seals between the gas filling duct 82 and the gas filling nozzle 73 to prevent gas being filled into the chambers from flowing past the gas filling nozzle. The figure also shows that the duct knife 78 is mounted on either the gas filling nozzle or on the connecting gas pipe 732 so that the blank can pass the gas pipe 732. When the inlet openings 17 of the chambers 16 are in the middle of a first drive wheel 132 for the toothed belt 68, the inlet openings will be compressed and kept compressed. The bag passes the rotating reindeer knife 76, whereby the bag hanging device 23b, the gas filling channel 82 and parts of the inlet openings are removed, whereby separate gas-filled bags 133 with goods are formed. These bags pass the welding jaws 662 where a closure of the entire side of the bag takes place, after which the packing is completed.

As shown in Figure 13, the blank can be designed in different ways, for example that the packaging blank is provided with chambers which are placed on both sides of a fold line, which means that the package then does not receive a gas filling on its edge.

Claims (11)

25 30 535 972 16 PATENT REQUIREMENTS Packaging device which device comprises two guide arms (41, 42, 61, 62, 251, 252) provided with holding means (24, 41, 42) arranged to hold up a continuous blank (13) by means of suspension devices arranged in the bag blank. (15, 23a, 23b, 43a, 43b), which holding means are designed as sliding grooves (24) or sliding rails (41, 42) for the suspension devices of the bag blank (13) to slide on or in, the guide arms being arranged to be widened from each other for the bag blank (13) to be opened and filled with a product at a filling area (63) and which guide arms run parallel to each other so that the packaging blank can be closed at a sealing area (120), characterized in that the bag blank (13) comprises a series of delimited chambers (16) over the entire surface of the blank (13) which chambers are provided with inlet openings (17), the bag blank (13) being arranged to be fed along the guide arms of the device from a magazine (71), the device being provided with at least a gas filling nozzle (73) formed with outflow holes (74) directed towards the inlet openings (17) of the bag blank (13) to thereby fill gas into the chambers (16) which will thereby form protective gas cushions around the packaged product. Device according to claim 1, characterized in that the gas filling nozzle (73) is designed as a cylindrical pin oriented parallel to the holding means and whose outflow holes (74) are located on the periphery of the cylindrical pin forming an outflow direction perpendicular to the cylindrical the direction of the pin. Device according to claim 2, characterized in that the gas filling nozzle (73) is provided with an externally placed seal (131) intended to seal between the gas filling nozzle (73) and a gas filling duct (82) arranged in the blank (13). . Device according to claim 3, characterized in that a duct knife (78) is mounted in connection with the gas filling nozzle (73) for cutting the gas filling duct (82) when the bag blank (13) passes. 20 30 535 972 17 Device according to claim 1, characterized in that the gas filling nozzle is formed with a gas divider (101) which is arranged to distribute filling gas to the inlet openings (17) in the chambers (16) formed in the bag blank (13). Device according to one of Claims 1 to 5, characterized in that nip rollers (121, 122) are arranged in connection with the gas filling nozzle (73) in order to block the inlet openings (17) of the chambers (16) of the bag blank (13) in order to prevent premature gas filling of these. Device according to any one of claims 1-6. characterized in that the device is provided with a press device (67, 68) and a welding device (661, 662), which press device is arranged to compress the inlet openings (17) of the chambers (16) after gas filling and to pour the inlet openings compressed during the the blank with the gas-filled chambers passes said welding device which closes the bag blank with the chambers in the sealing area (120) and forms separate gas-filled bags (133). Device according to one of Claims 1 to 7, characterized in that a compressor and / or a pressure vessel are connected to the gas filling nozzle (73) via gas pipes (731, 732). Method for packaging goods in a continuous bag blank (13) which is designed to slide on or in guide arms, characterized in that the bag blank (13) is formed with a series of delimited chambers (16) over the entire surface of the bag bag (13) which chambers are provided with inlet openings (17), the bag blank (13) being filled with goods and fed further along the control arms of the device against a gas filling nozzle (73) which presses gas through openings (74) into the delimited chambers (16) formed in the bag blank (13), after which the chambers (16) and the bag blank are welded together into sealed packages. Method according to claim 9, characterized in that the inlet openings (17) of the chambers (16) are compressed after the gas filling and are kept compressed until welding of the inlet openings (17) has taken place. 535 972 18 Method according to one of Claims 9 to 10, characterized in that the chambers are prevented from being filled with gas before they arrive at the gas filling nozzle (73) in order to prevent premature gas filling.