WO2019149442A1

WO2019149442A1 - System and method for taking off a protective suit

Info

Publication number: WO2019149442A1
Application number: PCT/EP2019/000031
Authority: WO
Inventors: Nik Keel
Original assignee: Tb-Safety Ag
Priority date: 2018-02-01
Filing date: 2019-02-01
Publication date: 2019-08-08
Also published as: EP3746188B1; CH714620A2; EP3746188C0; EP3746188A1

Abstract

The invention relates to an arrangement for hermetically securely docking a protective suit (1) to a connecting hose (10) and for allowing the wearer of the protective suit (1) to leave a contaminated inner region (4), which arrangement has a passage hose (8) which adjoins a passage opening in the outer region (5), it being possible to connect the inner wall of said passage hose to the outer wall of the connecting hose (10) in order to form a closable pass-through opening (6) in the outer region (5). An exit tunnel (13) adjoins the passage opening (30) out of the inner region (4), wherein at least that section (31) of said exit tunnel which is opposite the passage opening (30) is composed of a flexible material, and the passage hose (8) adjoins the end section (31) of the exit tunnel (13) in a hermetically sealed manner.

Description

System and method for extracting a

The invention relates to an arrangement for hermetically safe docking of a protective suit and for leaving a contaminated inner area, according to the preamble of claim 1, and to a method for safely removing and disposing of a protective suit, according to the preamble of claim 6.

Full protective suits are used by workers in contaminated hazardous areas, such as chemical, biological or radioactive contaminated areas. They protect the person by covering the entire body from head to toe, with the suits completely sealed. In this case, neither moisture nor heat pass through the suit material to the outside. When leaving the danger zone, the aim is to dispose of the contaminated suit as controlled as possible and not to carry the contamination into the outside world, according to the principle of not carrying hazardous substances. For this purpose, various lock systems and exit methods are known. For example, the exit from the hazardous area passes over locks, where the person is exposed to, for example, a (water) mist to bind particles. After taking off the suit, the breathing apparatus is placed in a small lock in the next lock and the underwear removed. In the next lock room is the hygiene shower.

An arrangement and a method for putting on and taking off a protective suit are known from DE 30 13 629 C2, wherein a foldable connecting hose is connected to the protective suit, which serves for the entry of the working person into the protective suit and can be connected to an access opening of a working area is. The connection hose consists of a fusible foil material and is connected to the access opening for putting on the protective suit. After the worker has entered the protective suit, the connecting tube is closed by melting. Subsequently, the connecting hose is separated, so that the two ends are closed. To remove the protective suit, the tube section connected to the protective suit is fused to the tube section attached to the access opening, such that after the melted connection section has been cut through, the tube section connected to the protective suit is open and connected to the tube section which adjoins the access opening is attached. The suit should be reused, and that

CONFIRMATION COPY Procedure is not suitable for safe disposal of the protective suit after each work cycle.

The invention has for its object to provide an arrangement for docking a Schutzanzu- ges and a method for safely removing a protective suit, so that when leaving the contaminated area and on leaving the protective suit a complete separation between the inside and outside of a protective environment is achieved, and thus contamination from one side to the other is avoided.

This object is achieved by an arrangement having the features of the independent claims 1 and 6. Further advantageous features of the invention are contained in the dependent claims, the description and the drawings.

Like the known arrangement, the solution according to the invention is designed for a protective suit which has a fusible connecting hose, the inner wall of which is separable, preferably peelable, at least in the connecting region. This connection region is the end of the connecting tube facing away from the suit, through which the wearer of the protective suit can leave a contaminated inner region through a closable passage opening into a non-contaminated outer region. For this purpose, the arrangement furthermore has a passage hose made of flexible, hermetically sealed and preferably weldable material adjoining this passage opening in the outer area and separating the inner area from the outer area. Furthermore, the inner wall is configured in such a way that it can be connected to the outer wall of the connecting hose in a connection region in order to form a closable passage opening from the inner region to the outer region. The connection is preferably made by welding, but may also be an adhesive connection or a combination of two positive surface areas. The connecting hose connected to the passage hose can be separated in the connection area.

The invention is characterized in that adjoining the passage opening is an exit tunnel, wherein at least its portion of the passage opening opposite the flexible material consists, and that the passage tube hermetically connects to the end portion of the exit tunnel. This design makes a particularly simple and rapid as well as against damage to the hermetic Barrie- safe escape of the wearer of the protective suit guaranteed. Since due to the flexibility of the exit tunnel and of course the material of the passage tube, for example a tubular film, these elements can be brought into any position, the wearer of the protective suit can normally go from the interior into the exit tunnel, where he In any position after opening the passage opening, the end of the exit tunnel as well as the passage tube can be slipped over. For the hermetically safe separation of the connection to the contaminated interior, the passage tube can then again be guided to a suitable device, independently of the position and position of the wearer of the protective clothing.

Particularly preferred is an arrangement in which the end of the exit tunnel is formed by a preferably manually in space freely movable and orientable annular element to which the passage tube hermetically sealed. Thus, the end of the exit tunnel and the passage tube can be easily and safely manipulated by assistants and also slipped over the wearer of the suit. If desired, an automatic manipulation arrangement, for example a robot arm, can also take over this movement.

Advantageously, the annular element also serves as a reservoir for the passage tube, so that there is always enough material for the complete exit process including the wrapping of the suit and its hermetic separation, but always only so much material is delivered to the work and BE - Do not obstruct the conditions of persons and equipment.

If the arrangement according to a further embodiment of the invention is characterized in that the exit tunnel connects to a separating wall which hermetically separates the interior area and the outside area and has a closable passage opening, the arrangement can be used as a replacement or supplement to conventional doors or gates be used between contaminated indoor areas and clean outdoor areas.

The addition of the arrangement according to the invention is particularly advantageous by a welding device for connecting the connecting tube and the passage tube and / or by a separating device for separating sections of the connecting tube and the passage tube and / or a combined tube Cutting-off device with at least one separating-welding element. If appropriate, these devices can also be present as separate units, but a fixed connection, for example to the partition wall, by means of a manipulation arrangement ensuring the mobility of the devices is also conceivable.

Separation welding is understood to mean a process in which the film material is both welded, which applies in particular to films lying over one another in a planar manner, and is also separated, in particular, a region adjoining one another in front of and behind the dividing weld seam. Welding bonds the film material together to form a weld area. In addition, a separating seam is applied in this welding area, so that a welding area remains on both sides of the separating seam, in which the foils are connected to one another. In a preferred embodiment, the separating seam is a perforated seam, at which the sides of the film can be torn off.

However, the subject invention also relates to a method for safely removing and disposing of a protective suit when exiting a contaminated inside area shielded from an outside area, for wearers of protective suits with a hermetically sealed connecting tube made of a fusible material, which is suitable for entry and exit of a working person the protective suit serves. This connecting tube is preferably connected by welding in a connecting region with a through-hermetically sealing the inner region against the outer region, and in the emergence process the projecting region is separated therefrom. The connecting tube is torn open from the inside of the protective suit in such a way that a through opening is formed, through which the working person gets out of the protective suit. Preferably, the connecting tube is provided with a peelable layer or made of such material.

According to the invention, such a method is characterized in that an arrangement according to one of the preceding paragraphs is applied, that after the connection of connecting hose and passage hose the worker with the protective suit reaches the end of a flexible exit tunnel and the passage opening is made at the end in that thereafter the passage opening and the end section of the exit tunnel are guided along the work person and the protective suit is also removed. strikes and thus also immediately turned around, and finally the protective suit with the inside outward pulled through the through hole, the passage hose welded behind the through hole and thus the suit surrounded by the material of the passage tube and ultimately the protective suit enveloping length of the passage tube is separated. The advantages associated with this method correspond to those which have already been explained above in connection with the arrangement according to the invention.

The discharge process can be designed in a particularly convenient and secure manner if, according to a preferred variant of the method, the annular element as well as the passage opening and the end section of the exit tunnel are guided essentially downwards from one another along the working person.

An optional variant according to the invention also contributes to the safe handling and to the rapid emergence process, which is characterized in that the protective suit is at least partially everted in the course of the movement of the through-opening and the end section of the exit tunnel along the working person.

To dispose of the suit, the suit is pulled inside out through the opening. The clean inside of the suit now points to the outside of the protection environment. The passage tube and the protective suit can preferably be closed by means of separation welding and separated in the welding area. In this way, the interior of the protection environment is open to the outside at any time and the suit can be safely disposed of.

Further advantages and features of the invention will become apparent from the following description, in which the invention with reference to an exemplary embodiment shown in the schematic drawings is explained in more detail. Show it:

1 A-E a protective suit in perspective view with and without apparatus for separation welding,

2 shows the inventive arrangement in the exit area for use with a protective suit, and with a device for separating welding in vertical cross-section, 3 AE, the front ends of the passage tube and the connecting tube in vertical cross section in various stages of the process, as well as the drawn outwards and at the end of the passage tube separated protective suit in vertical cross-section, Fig. 4A-B, a reservoir in vertical cross-section,

5 the exit tunnel in a perspective view from the side,

Fig. 6 the exit tunnel in a perspective view from above, at the exit of a

Protective suit carrier,

7A-B, the exit tunnel with extended and inverted protective suit in perspective from behind,

8A-B show two different embodiments of a reservoir in perspecti vischer view,

9 shows a cross section through the Trennschweissbereich a film, and

10 shows an embodiment of a device for separating welding in a perspective view.

In the figures, the same reference numerals have been used for the same elements and first explanations apply to all figures, unless expressly stated otherwise.

FIG. 1 A represents a protective suit 1, preferably for single use and subsequent disposal, for which the arrangement according to the invention is provided and from which the method according to the invention permits a safe, rapid and convenient escape. It is made of a tear-resistant foil, preferably of a thermoplastic or polypropylene, and has a connection hose 10 on the front side of the suit 1. The connecting tube 10 is preferably made of a fusible, separable material, preferably of a peelable film material, more preferably of polyethylene, even more preferably of LDPE (low density polyethylene). The term peelability is understood to mean the separation of a weld seam, also called seam seal, wherein z. As a film without tearing, stringing or Häutchenbildung of another foil can be separated. The separation can be done manually or with pressure.

This is typically done by a hermetically sealed by means of waterproof zipper entry into the back of the protective suit 1. The contaminated interior 4 is for example a treatment tent in medicine or Chemistry, a mobile laboratory or even a shielding area in a hospital or on the way, where a contaminated area 4 from a clean area, typically the outside world, shielded. However, constellations are also conceivable in which an interior area is clean and an exterior area is contaminated. Here, all statements made in this document apply mutatis mutandis to reversed indoor and outdoor areas.

The connecting tube 10 has an open end 12. It is particularly preferred that the outer edges at the end of the connecting tube 10 are folded inwards, as shown in the upper detail of FIG. 1A. Thus, an improved and more stable sealing of the end of the connecting tube 10 can be achieved.

As shown in FIG. 1B, the protective suit 1 is hermetically sealed by welding the open end 12 of the connecting tube 10 before the operation in a contaminated environment by welding. This can preferably be carried out by a device for separating welding, which has at least one welding element 11 for sealing meltable film materials, and at least one separating element, preferably a perforating element, both of which can also be operated separately from one another. In this case, the welding elements 11 or separating elements can be moved relative to one another in a parallel manner and a force can be applied to one another in order to clamp the materials to be welded or separated therebetween. Other possibilities for hermetic closure of the connecting tube 10 are possible and known to the expert. FIG. 1C shows the protective suit 1, the connecting tube 10 and the finished welded connection 24 at the outer end of the connecting tube 10. In this case, in the preferred embodiment, the ends folded inwards are welded together on their inner side. In Figure 1D, the connecting tube is wrapped in the suit 1 and covered so that it is as flat as possible on the front on and on and does not hinder the work of the wearer of the protective suit. The receiving pocket for the inserted connecting tube 10 is preferably closed by means of an adhesive strip or a similar sealing method.

FIG. 1E shows a further embodiment of a device 9 for separating welding, in which two welding bars 11 which can be pivoted against each other in a tong-like manner are mounted on a light frame. After inserting, for example, the end 12 of the connecting hose 10, the welding bars 11 are closed and held in contact with each other during the welding process by means of a bow or snap fastener, in order to clamp the material to be processed therebetween and exert pressure on it.

After the operation in the contaminated environment, the wearer of the protective suit 1 moves, as shown in FIG. 2, to the transition between the contaminated inner area 4 and the clean outer area 5, the hermetic separation of these areas typically being accompanied by a possibly mobile partition wall 27 a passage opening 30 is formed. On the outside of the partition wall 27 connects to the passage opening 30 to a movable exit tunnel 13, which is preferably made entirely and over the entire length flexible and typically made of a thermoplastic material. At least, however, the partition 27 facing away from the end 31 of the exit tunnel 13 is flexible. At this end 31 further includes a passage tube 8 of flexible and hermetically sealed material, preferably a thin and / or transparent tubular film, which ensures the hermetic separation of the inner region 4 and outer region 5. The passage tube 8 may be made of polyethylene or polypropylene, preferably it is made of polyethylene. Preferably, the material of the passage tube 8 itself is not separable, ie tear-resistant. It is preferably folded in a preferably annular or any frame-like shaped element 7 as a bellows, so that this element 7 is a reservoir for the passage tube 8, from which this can be pulled out as needed and in the desired length. For arrangements which only have to be designed for a few discharge operations, a short passage hose 8 can be connected directly to the end 31 of the exit tunnel 13 without the need for a storage container 7. Particularly preferred are transparent and as good as possible transparent materials for the passage tube 8, possibly also for the exit tunnel 13. The latter has at least one transparent portion or a window-like transparent area for contacting the person to be ejected.

As a first step of the process for safely removing the protective suit 1 and the off step from the contaminated interior 4 of the connecting hose 10 is unwound from the protective suit 1 - resulting in a state as shown in Figure 1C - and with the verschwel ssten end 24 so in introduced the passage tube 8 that the passage tube 8 encloses the connecting tube 10, as shown in Figure 3A. In principle, it is insignificant how the end pieces of the two hoses 8, 10 are executed, and whether they are tips, edges, burrs or the like, depending on whether the end portions of the hoses have a constant cross section or are the same Reduced cross-section of the protective suit 1 away.

The further steps for the process of safely removing the protective suit 1 are shown schematically in FIGS. 3A to 3D. In this case, the protective suit 1 is connected via the connecting tube 10 with the passage tube 8. For this purpose, as shown in Figure A, the end of the connecting tube 10 of the protective suit 1 is inserted into the passage tube 8 and in a connecting region 17 of the connecting tube 10 is welded on its outer side with the inside of the passage tube 8. Within the connection region 17, the outer end of the passage tube 8 with the end of the connection tube 10 received therein is subsequently separated with its weld seam 24 or otherwise hermetic closure - as shown in FIG. 3B - and can be disposed of. The end of the protective suit 1 located on the connecting hose 10 and the passage tube 8 are connected to each other by welding. After disconnecting the protective suit 1 facing away from the two hoses 8, 10, the connecting hose 10 can be torn open from the inside, as shown in Figure 3C, resulting in a through hole 6 in the connecting tube 10 and the passage tube 8, through which the carrier of Protective suit 1 can leave this after he has also crossed the passage opening 30. In order to facilitate the tearing of the connecting tube 10 to form the Durchgangsöffhung 6, a peelfahigen layer 18 may be provided on the inside of the connecting tube 10 in the connecting region 17 or this is made of a total peelable material. Instead of a welded connection for hermetic closure of the Verbindungsschlau Ches 10 or for the connection of the connecting tube 10 and the Durchtrittsschlau Ches 8 also adhesive compounds, for conclusive connections of the surfaces, for example, elaborated on therein complementary structures, etc. can be used.

Preferably, the welding of the passage tube 8 and connecting hose 10 is carried out simultaneously with the separation of the ends of these films, in particular vorteilhaf terly by attaching a Trennschweissnaht 23 by means of the Trennschweisselementes 1 1 of the device 9 for separation welding 9. Preferably, the Trennschweisselement 1 1 contains a combinable welding element and Separating element, but which can also be used separately from each other. The separator can be pulled up if necessary, so that a weld is formed, without at the same time a separating seam is formed, for example, to hermetically seal the end of the connecting tube 10th

The connecting tube 10 and the passage tube 8 are still closed together in the connecting region 17 on both sides of the separating weld seam 23 or the otherwise separated end sections, so that no exchange between the contaminated inner region 4 with the clean outer region 5 can take place.

In Figure 3D, another optional step is shown schematically, in which the Schutzan train 1 and the connecting hose 10 Gezo conditions outwardly through the Durchgangsöffhung 6 and thereby simultaneously everted. Finally, if another separation weld 23 is attached again, if necessary, any other but similar func tional precautions are taken, the passage tube 8 is welded on both sides of a separation area and hermetically sealed. This gives the separated protective suit 1 with the inside out as shown in Figure 3E. This can be safely disposed of.

In FIG. 4A, a reservoir 7 is shown separately in section in a preferred embodiment, wherein clearly the reservoir region 14 for stowing a supply of the passage tube 8, typically a tubular film material, can be seen, as well as a fastening element 15 for fastening to the exit tunnel 13 and a handle 16 for manual manipulation. FIG. 4B shows a detail of FIG. 4A on an enlarged scale. FIG. 5 shows a preferred embodiment of the exit tunnel 13 fastened to a dividing wall 27 between the inner region 4 and the outer region 5 and preferably movable, at whose end region 31 the passage tube 8 adjoins. For this purpose, this preferably flexible end region 31 is connected to the annular, for example circular or elliptical storage container 7, from which the passage tube 8 can be pulled out in extension of the exit tunnel 13. The end of the passage tube 8 opposite the dividing wall 27 is welded and therefore hermetically sealed.

Figure 6 shows the preferred implementation of the method step of stripping the protective suit 1 and the passage through the opening 6 through the wearer of the protective suit 1. He has gone through the passage opening 30 in the partition wall 27 in the exit tunnel 13 and is now in the flexible end portion 31. There, the torn through opening 6 is guided together with the connecting tube 10 on the inside and thus welded in the connection region 17 passage tube 8 on the outside along the work person shown here from top to bottom, which in the first place by the mobility of the exit tunnel 13 and / or at least the flexibility of its end portion 31 is made possible. Through this passage opening 6, the worker can then get out by simply rising out of the annular element 7. The working person can pull the movable exit tunnel 13 over his head himself, but this process step can also be carried out by auxiliary personnel, who for this purpose grips the storage container 7 on the handles 16 and guides them accordingly and guides them past the working person. As already mentioned above, the reservoir 7 can also be dispensed with, and the wearer of the protective suit 1 then simply inverts the connecting region between the exit tunnel 13 and the passage tube 8 via the head and body, in which connection region the passage opening 6 has been cleared.

It is also possible to accomplish this movement and spatial orientation of the storage container 7 automatically by means of a driven manipulation arrangement, for example a robot arm. Also, the passage or exit of the worker is through this passage opening 6 and the protective suit 1 with the inside to the outside through- drawable, as shown schematically in Figures 3D and 3E. At the same time, this process also causes the protective suit 1 to be turned inside out, so that its contaminated side is covered on all sides.

FIG. 7A shows the end region 31 of the exit tunnel 13 with the storage container 7 and the through-tube 8 designed here as a tubular film, the continuous connection hose 10 and the solid protective suit 1 with the inside outward.

The dashed line indicates the area where, for example, a separation weld seam 23 is attached to the device 9, or a hermetically sealed separation of the section of the passage tube 8 remaining at the exit tunnel 13 from the longitudinal section of the passage tube 8 hermetically closing the connection tube 10 is carried out with other devices , FIG. 7B shows, in addition to the elements shown in FIG. 7A, the device 9 placed on the outside of the protective environment for separating or otherwise separating the sections of the passage tube 8 and the partition wall 27.

FIGS. 8A and 8B show preferred embodiments of the annular reservoir 7, in FIG. 8B without the passage tube 8 received therein. The reservoir of FIG. 8A consists of a base ring 32 with an inner collar 33, the inner side of which forms an opening through which the user of the protective suit 1 passes. On the outside of the inner collar 33 is the bellows or zigzag-laid through tube 8 and is held by the cover 34. Between the inner collar 33 and the inside of the cover 34, a cylindrical annular receiving space is formed, which is closed towards the front by the inwardly projecting front end face 35 of the cover 34, which thus prevents the entire passage tube 8 from falling out.

The reservoir of FIG. 8B consists of an inner annular cylinder 21 and an outer annular cylinder 22, which are connected via the closed side 28 at the end directed towards the inner region 4 or the end region 31 of the exit tunnel 13. On the side directed toward the outside, an annular opening 29 is kept free, so that, for example, a tubular film deposited in the storage container can be pulled out via this opening 29 if necessary. Handles 16 allow the manual manipulation of the storage container 7. FIG. 9 shows the separating weld seam 23 of a welded tubular film as the material of the passage tube 8 with a welding region 19, which consists of a first welded connection 25 and a second welded connection 26 and a separating seam 20. The separating seam 20 is preferably a perforated seam. FIG. 10 shows an optional embodiment of a device for separating welding 9 with a combined welding element and separating element, the separating element 11. With this device, film material, as typically used for the connecting tube 10 or the passage tube 8, can be welded and separated at the same time. The two jaws of the separating welding element 11 can here be moved apart in a parallel arrangement and toward one another and can also be acted on one another with a force in order to clamp the material to be processed therebetween and exert pressure thereon.

Reference designation protective suit 28 closed side of the supply container-outfeed area

Protective environment 29 open side of the reservoir Inside 30 Passage opening

Exterior 31 End section of the exit tunnel Access opening 32 Base ring

Reservoir 33 Inner collar

Passage hose 34 cover

Separation welding device 35 Front side

connecting hose

Separation welding element

open side of the connection hose

exit tunnel

storage area

fastener

Handle

connecting area

Peelable layer

welding area

separating seam

inner ring cylinder

outer ring cylinder

Separating weld

Weld connection of the connection hose

first welding connection of the

Passage tube

second welding connection of the

Passage tube

partition wall

Claims

Patent claims

1. Arrangement for hermetically safe docking of a protective suit (1), which has a fusible connecting hose (10) whose inner wall is separable, preferably peelable, at least in the connection area (17) and for leaving a contaminated inner area (4) through the wearer of the protective suit (1) through a closable passage opening (30) into an uncontaminated outer area (5), the arrangement comprising:

a) a passage hose (8) of flexible, hermetically sealed and preferably weldable material adjoining this passage opening in the outer region (5) and separating the inner region (4) from the outer region (5),

b) whose inner wall can be connected to the outer wall of the connecting tube (10) in a connecting region (17), preferably by welding, in order to form a closable passage opening (6) from the inner region (4) into the outer region (5), wherein the connecting hose (10) connected to the passage hose (8) can be separated in the connection area (17),

characterized in that

c) adjoins the passage opening (30) an exit tunnel (13), wherein at least the passage opening (30) opposite section (31) consists of flexible material, and

d) the passage tube (8) hermetically sealed to the end portion (31) of the exit tunnel (13) connects.

2. Arrangement according to claim 1, characterized in that the end of the exit tunnel (13) by a preferably manually in space freely movable and orien- tierbares annular element (7) is formed on which the passage tube (8) hermetically sealed connects , (Note: explicitly mention in description)

3. Arrangement according to claim 2, characterized in that the element (7) serves as a reservoir for the passage tube (8).

4. Arrangement according to one of claims 1 to 3, characterized in that the exit tunnel (13) adjoins a the inner region (4) and the outer region (5) hermetically separating partition (27) with a closable passage opening.

5. Arrangement according to one of claims 1 to 4, characterized in that a welding device for connecting the connecting tube (10) and the passage tube (8) and / or a separating device for separation for interconnected portions of the connecting tube (10) and the passage tube ( 8) and / or a combined separation-welding device with at least one separating-welding element (11) is present.

6. A method for safely removing and disposing of a protective suit (1) on leaving a contaminated inner area (4) which is shielded from an outer area (5),

a) wherein the protective suit (1) a hermetically sealed connection hose (10) made of a fusible material is attached, which serves for entry and exit of a work pens in the protective suit (1), and wherein

b) the connecting tube (10) in a connecting region (17) with a the inner region (4) hermetically sealed against the outer region (5) sealing passage hose (8) preferably connected by welding and the supernatant region is separated, characterized in that

c) using an arrangement according to one of claims 1 to 5

d) after the connection of the connecting hose (10) and through hose (8), the worker with the protective suit (1) reaches the end (31) of the exit tunnel (13) and the passage opening (6) is produced,

e) wherein the connecting hose (10) from the inside of the protective suit (1) is opened, preferably torn open, such that at the end of the exit tunnel (13) a through opening (6) is formed, through which the worker from the protective suit (1) get out after what

f) the protective opening (6) and the end section (31) of the exit tunnel (13) are guided along the working person and thereby also the protective suit (1) is stripped, g) that then the protective suit (1) with the inside outward through the Continuous opening (6) retightened, the passage tube (8) behind the passage opening (6) welded and thus the protective suit (1) from the passage tube (8) is wrapped, and g) ultimately the protective suit (1) enveloping length of the passage tube (8) is separated from.

7. The method according to claim 6, characterized in that the annular element and the passage opening (6) and the end portion (31) of the exit tunnel (13) are guided along the working person substantially from top to bottom.

8. The method according to claim 6 or 7, characterized in that in the course of movement of the through hole (6) and the end portion (31) of the exit tunnel (13) along the working person, the protective suit (1) is at least partially everted already.