DE1617959A1 - Method and device for the aseptic removal of liquid from a packaging material in web form - Google Patents

Description

Patent Attorneys ^
M0NCHEN8
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Telephone 443755

P 8544-125 Br »B / tr

AB TEILBA ΈΑΚ, iDHD (Sweden)

Method and device for the aseptic removal of liquid from a web-shaped multi-pack material -

The present invention relates to chemical sterilization of packaging material by means of a liquid and relates in particular to a method and a device for removing the sterilizing liquid of the packaging material after the end of the sterilization.

During the chemical sterilization of bahnfSrmigen packaging materials, the removal of the liquid used for sterilization is a sehoa longstanding iroblenu The sterilization of the Matariale wiird generally in the Si £ connexion with the IFormesL WobL filling the packaging, performed _p wherein at least © -.The part of the Verpackungsioaterials _s which Al® indoor

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side of the finished baking should be in contact come with the sterilizing liquid. This can a. B, be carried out so that the sheeting is passed through a bath or the surface of the material smeared with the sterilizing liquid or the liquid is sprayed onto the surface.

Whichever method is chosen, there is always the problem of completely removing oils from the surface of the material before the packs are filled. When the packaging machine works at high speed, it has. Liquid does not have time to evaporate during the short period available. In particular, this is the pail when the liquid forms droplets on the surface of the packaging material. Evaporation 1st not even in most cases ER. wishes, since this could result in dried-up residues of the sterilizing agent being mixed with the filler material, which in general cannot be tolerated. Special hateful actions should therefore be taken in order to remove the liquid.

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Based on a known method, the web material is allowed to pass between rubber rollers, droplets of liquid present on the surface of the material being squeezed off by the orphans. This method has significant disadvantages. Firstly, "this method does not satisfy the high demands on sterility. Furthermore, the braking effect of the wheat creates strong tensions in the packaging material, and finally the rollers guide the material in the transverse direction in an animal-wished manner _- this guidance being dependent on τοη τοη τοη τοη τοη or physical variations of the packaging material.

Another known method is that the liquid is stripped from the material web with hard or soft material. The construction with the hard material causes considerable difficulties in terms of smooth engagement between the strip or scraper and the scraping material over the entire width of the latter and thereby also in terms of smooth scraping off the. Liquid. Eei a construction with soft material, e.g. 3. a kantschu-borne material,

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the soft material is removed from the edges of the sheet of material worn out very quickly, these edges acting like knives or saws. In the case of unsuitable surfaces tensions of the. Sterilizing fluid can be a Scraper, regardless of whether it is made of hard or soft * Material is also the liquid in the slot between a surface of the scraper and the sheeting accumulate, whereupon large drops of liquid are periodically drained away.

The present invention relates to a method and a device for the aseptic removal of

Liquid from a sheet-like packaging ^ - material without causing pulling of the sheet material is, characterized in that the liquid by means of a sterile gas, e.g. sterile left, along a line that extends from a lateral "Kant ·" of the material to the other is extended, blown away or peeled off, at the same time the sheet material is introduced into a packaging machine.

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Further measures of the invention emerge from the following example, which is described with reference to the accompanying drawings.

Pig. 1 shows schematically a device according to FIG Invention. . ; :

'I? Ig ... 2 is a section in direction A-A of FIg. 1.

Pig. 3a and 3b show the effects of open and closed systems according to the invention.

PIg. Figure 4 shows another embodiment of the invention

from which
PIg. 5 is an enlarged detail.

. 6 shows yet another embodiment. from which

Pig. 7 is an enlarged detail.

In Fig. 1, the web hair dryer packaging material 1 Guided in the direction indicated by arrow 2.

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The sheeting slides over a base 3 · The base is only shown schematically, although in detail can have different forms. IJm the friction between the packaging material and the base and thereby pull in the former to reduce or to switch off, can the base consist of an endless belt that moves at a speed and in one direction, which match those of the packaging material 2.

On the web material 1 there are drops of liquid 4 which are to be removed. This is done using a Gas pressure generating rope 5, for. B. a centrifugal blower, reached, the sterilized £ as, preferably sterile air, in the direction of arrow 6 in a substantially cylindrical tube 7, which with a Air accelerator 3 is provided. The following will assumed that sterile air is used.

In addition to the side walls in the plane of the paper, the air accelerator 8 has an upper wall 10 and a lower one Wall 11. Walls 10 and 11 are narrowing a slot 9 which forms a nozzle for the air flow. Within the range, the nozzle engages the Edge of the lower wall 11 on the web material 1.

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On the other hand, the upper wall 10 merges into a wall 12. Tom Luftbesehleuniger 8, a flow of air which C is uniformly strongly over the entire width of the packaging material and easily guided downwardly extruded through the nozzle 9, this air stream blows away from Tlüssigkeitstropfen Yerpackungsmaterial 1 to the ilüssigkeitaoainmler 17th

At the liquid collector, the liquid is discharged through a pipe 18 or the like. On the other hand, the still sterile air flows through the drum 13 in the sighting of the arrow 14 upwards and returns to the centrifugal blower 5 through the inlet 15. Its certain impermeability in terbindisag with the blowing off of the liquid from the web material can of course not prevent - »grounding, whereby a small part of the sterile air is lost. This loss of ventilation can be replaced by new sterilized air which is automatically introduced into the system by a sterilizer or a Luitreinlger 16. Possibly. a spring loaded valve 16 can be used instead.

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Fig. 2 is a section A-A of Fig. 1 and clearly shows. how to solve the sealing problem. A part 20 made of a soft, elastic material is e.g. B. made of fiberglass reinforced Teflon fabric » ,, .ι attacks the base 3 and prevents Gae, z. B. sterile air, outlet. The elastic member is attached to the top wall 12 by bending the edges of the wall 21 attached. In the direction of the arrow there is a locking effect also by the air pressure within that of the wall 12, the part 20 and the packaging material 1 enclosed space exercised.

The method described has inter alia. the following important advantages. It's aseptic. It doesn't cause any unwanted pulling or guiding of the path of the packaging material. It works with sterile air, which several times can be used without re-sterilization, which also makes the process very cheap.

The device results in a considerable amount of time per unit of time Amount of sterile air. The speed of the SiromeB is in and immediately behind the nozzle large. All mechanical particles (expressed as small Spots), including micro-organisms which may be present in the air, are

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if a device according to Pig. 3a is used on the surface of the sheeting to a much greater extent than at stationary or relatively slow flowing air. This is partly due to the fact that in the area of the nozzle a larger amount of air per unit of time touches the surface and partly due to the centrifugal force when the pressure nozzle is deflected.

Venn a device according to Pig. 1 or 3b used the air flowing out of the nozzle becomes the fan guided and used again and again »The system is closed. All that is needed is air, which may seep through, 'to be replaced. at which the air consumption is reduced to * a minimum

is therefore much more hygienic than a corresponding device with freely flowing air as in FIG. Borrowing the amount used as a replacement that needs to be sterilized can reduce the cost of the sterilization process bo be kept low that the process and the Vorrihhtung actually under technical Conditions can be applied.

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In Fig. 4 there is shown another embodiment of the invention shown. Instead of a blower nozzle, a suction nozzle 32 is used here, which drips the liquid sucks. The Saugsu is made by a strong Vacuum (indicated as the minus sign, where the plus sign Overpressure indicates} caused in the suction drum 32, which leads to the Aneaugöffmmg 15 "On the Exit side of the fan is a vacuum 30 ^ " provided, from which the air is passed through a bridge drum 51 is led down and liquid in the liquid sseparator 17 is separated.

Fig. 5 shows more clearly how the area of the suction nozzle can be constructed. -The suction nozzle 52 can consist of a narrow gap exist in a tube 54, of which a Segment cut off along the entire length of the tube is. The formed after the inside of the tube opening is facing the suction drum 53, whereby a strong vacuum inside the tube 34 and its SchlitzöffnuEg 3 £ is created «

The tube 34 can preferably be provided with threads or with flanges on its outside. Tuck threads or flanges serve ale Abstaudsglleder between the nozzle 32 and aeu Bshaenmaterial l _o

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Outside the area 32, the sterile air creates an overpressure in that part of the device which forms part of the pressure drum 31. This prevents air from the surrender from entering the system. Instead, a certain amount of sterile air is interposed

the paper web 1 and the wall 36 emerge. This lost amount must be replaced with new sterile air. The other side of the nozzle will be the sterile one

and air prevented from escaping / through a peder wall 37, which sealingly engages the railroad side, prevents non-sterile air from entering

In the gate direction shown in Fig. 6 and 7 is for removing liquid droplets and bubbles as well as suction applied · Me main parts of this device consist of two essential pipe conveying

migen parts 40 »nd 4-1, which are at right angles to the direction of movement the paper web 1 are arranged. The two tubular parts 40 and 41 stand with their End parts in connection with one another, those with one not fans shown are connected, and swar so that the Pipe 40 with the input or yakuum side of the fan is connected and Aaa tube 41 bit dsz- output- or Overprint side. V / ie in the earlier explanations are also means of supplying sterile air the fan available.

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The tube 41 has an outlet in the form of a nozzle 42 which is connected to the tube 40 in a manner analogous to that in FIG. The part of the tube 4O ₅ of the paper web 1 is sugekehrt is as au seen on beds of Fig. 7, formed so that it constitutes a part 43, which the air flowing from the Düsa 42 air to the upper wall of the tube 40 leads _o Above the part 43 a slot 44 is provided in the wgnd of the pipe. Under the influence of the very fast flowing air, a vacuum is created in the slot 44 with respect to atmospheric pressure by the action of a steel. Liquid droplets 4 that are present on the paper web are therefore drawn off through the slot 44. Drops which may not have been withdrawn are exposed to the air flowing out through the nozzle 42 and are blown away.,

The removed Flüosigkeitsaienge 17 is jammed and ge removed by a pipe 18 in the same way as before »With 45 a counter-support in the form of a deflection roller is designated. By combining suction and Bubbles will get a particularly great effectiveness of the device, although this device very simple in construction iet.

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Claims (1)

Claims Process for the aseptic removal of liquid from packaging material in web form without causing considerable pulling of the web material * characterized in that the liquid (4) is removed from the web material (1) by means of a sterile gas, e.g. Sterile air, along a line extending from a side. the edge of the sheeting extends to the other,
is blown off and / or sucked off, at the same time the web material is introduced into a packaging machine ». 2. The method according to claim 1, characterized in that the blown or sucked off liquid is collected and sucked off by special ropes (17, 18) and that the one used for blowing and / or sucking
sterile air is returned to a pressure-generating part 5 so that it can be reused for sterile blowing and / or suction. 3a Method according to Claim 1 or 2, characterized in that the gas flow during blowing has a direction which is or has substantially opposite to or the same direction as the direction of movement (2) of the web material. , _MÄA 209818/0792 4. Device for carrying out the method according to the preceding claims, characterized by a nozzle in the form of a schiita opening (9, 32} qaer over the entire width of the web material ₅ with which a part (5), e.g. a centrifugal blower, is connected, to produce a top pressure or a vacuum in the slit opening. 5. The method naoh claim 4 »gekennseblmet characterized in that in the event that the liquid is sucked from Bahneniaa material, the suction nozzle creates a vacuum that The area around the suction nozzle is under a pressure which is greater than that of the outer bypass »to prevent that microorganisms invade the system. 6. Device according to the preceding claims, characterized by on the one hand a Sehlitzoffmmg in the form a blower nozzle (42), on the other hand a slot opening (44) which is arranged parallel to the blower nozzle Is, which under the influence of the sterile gas flow through the nozzle by jet effect creates a vacuum with respect to atmospheric pressure schaiS.-, whereby the Possibility of the liquid both by blowing and by sucking a using the same To remove pressure source is created. .- 209818/0792