WO2004024563A1

WO2004024563A1 - Method, device and bag roll for preparing hazardous substances

Info

Publication number: WO2004024563A1
Application number: PCT/EP2003/009495
Authority: WO
Inventors: Josef Keuchel; Werner Theissig
Original assignee: Josef Keuchel
Priority date: 2002-08-27
Filing date: 2003-08-27
Publication date: 2004-03-25
Also published as: ATE445538T1; DE50312035D1; EP1581431B1; AU2003270115A1; EP1581431A1

Abstract

The invention relates to a method, a device, and a bag roll for preparing and packing hazardous substances. The preparation of hazardous substances for clinical and pharmaceutical fields is carried out in safety workbenches (1) comprising a low-pressure working chamber which is shielded by a front pane (2) comprising an opening (3) for an arm and through which purified air flows in a laminar manner. A container is filled with the substances in said working chamber. The contents of said container and the waste are separated into second containers (6). In order to facilitate the supply, preparation, closing and transport of said second containers, they are embodied as bags (6) which are pulled off a bag roll (10) in the form of a bag strip (6a), and are opened by pulling a flap (18) located on the bags (6), in such a way that the bag opening (19) faces the working opening (3) and the passage (5), and the bags (6) are filled, then closed, separated from the bag strip (6a) and supplied to a collecting basin (20).

Description

Process, equipment and roll of bags to prepare dangerous

substances

The invention relates to a method, a device and a roll of bags for the preparation of dangerous substances and their waste.

The ready-to-use preparation of such substances for clinical use and normal pharmacy operations is usually carried out in safety cabinets in accordance with DIN 12950/10 or DIN 12980. These consist of a work area which is under negative pressure and which is shielded from the operator by a front panel with an arm opening and from Air flows through laminar. Using high-performance suspended matter filters, the air is cleaned in a circulating air process, so that optimal protection for the operator is achieved (see brochure from Berner International "Cytostatics Protection Systems, Safety Workbench H-130"). The waste that is hazardous to health during preparation is fed into a special waste container and welded into a film tube there.

It has now been shown that despite the known protective measures, there are still certain dangers in that the containers filled with the substances during preparation, such as, for example, infusion bottles, infusion bags or perfusion syringes and the like, also have traces of this substance on their outer surface , which is why there is still a residual risk to health when handling these containers. In order to counteract this deficiency, it is proposed in the still known DE 199 24 857 A1 for a device of the type mentioned at the outset to attach a device to a safety workbench with a swivel part in such a way that the swivel part can be moved into the region of the working opening of the safety workbench and extends vertically there and that fastening means are provided on the sides of the pivoting part facing outward with respect to the working space, which hold a second plastic container with its opening coaxial with an opening of the pivoting part and the working opening in front of it. Therefore, both the waste and the filled container securely packed in the second plastic container and then sealed.

Bag rolls generally consist of a plurality of bags arranged one behind the other in the form of a band, which are removable from the bag roll.

Bag rolls of this type are generally known and are provided, for example, in shops and supermarkets, so that customers can pull bags off these rolls and fill them with fruit, vegetables or the like. The bags arranged one behind the other in a band are connected to one another by a predetermined breaking point, which means that the users can tear off a bag from the roll of bags by pulling them together. The crack occurs along the predetermined breaking point.

It has been shown here that tearing off the bags from the bag roll is sometimes difficult because the individual layers of the thin-walled plastic bags adhere to one another in an undesirable manner and cannot be easily removed from the bag roll. In addition, the walls of a bag stick together so much that the bag is difficult to open.

These known agents ensure a high level of security against contamination of the environment such. B. of the workplace, but there is still a need for easier feeding, providing, closing and transporting the second plastic containers. It is the object of the present invention to achieve this.

This object is achieved by the features of claims 1, 3 and 14. According to claim 1, this is done according to the method of the type mentioned at the beginning and the measures known from DE 199 24 857 A1 by using one bag each as a second container for receiving the first containers filled with the preparation of the dangerous substances and the resulting waste. This bag is pulled off a roll of bags in the form of a bag band, guided behind a passage opening and opened there, the bag opening being kept facing the work opening of the safety workbench and the downstream passage opening of a device for receiving the bag, so that the filled ones first containers or the waste can easily be placed in the open bag from the work area of the safety workbench. At the end of the filling process, the bag is closed by actuating a switch, separated from the bag belt and transported away.

While claim 2 gives details of the bag material used, claim 3 relates to a device for carrying out the method according to claim 1 with all the essential physical features of the device. Due to the intended automatic sequence of the individual process steps and the devices used for this, simple preparation and packaging of the dangerous substances is clearly achieved while maintaining the safety standard.

According to claim 4, a housing in the form of a hollow body forms the rectangular passage opening of the device for receiving the bags, the hollow housing accommodating the extraction roller pair, the guide plate and the gripping, closing and separating device and thereby enabling a compact arrangement of the individual components ,

According to claim 5, the housing is pivotally attached to the safety workbench by means of a holder and thereby adjustable in its position.

According to claims 6, 7, 8 and 9, the bag roll consists of a plurality of bags arranged one behind the other with an endless carrier tape as the back, the bag roll being arranged in a bag cassette which is held on the housing by an insertion groove. The withdrawal of the bags from the roll of bags is carried out by a motor with a control device. The provision of the bags is thus realized in a simple manner.

The gripping device according to claim 10 is arranged on two parallel, drivable threaded spindles which move the gripping device downwards after gripping the bag flap and thereby open the bag. To close the bag, the gripping device is moved up again by the mutually drivable threaded spindles. Claims 11 and 12 show the possibilities of closing the filled bags by gluing or welding. Of course, other common closing measures such as. B. seal, pinch or the like. Are used.

According to claim 13, a collecting tray for the bags is provided behind the passage opening of the device for receiving the bags, which carries the bags during the filling and transport process and thereby ensures the desired position of the bags.

In order to overcome the aforementioned difficulties in the handling of the known bag rolls and to enable the bags to be easily detached from the bag roll and the bags to be opened easily, the embodiment specified in claim 14 is proposed.

The features of claim 15 ensure that the bags, which are accommodated in cassettes, are protected from the roll and that the individual bags are properly separated from one another. The tearing of the bags at undesired points, which sometimes occurs in the prior art due to insufficient weakening at the predetermined breaking points, is avoided.

With the features of claim 4, the trigger length and speed can be controlled properly. In claim 5, particularly suitable materials for the bags and the carrier tape are specified. The claim 6 relates to a simple holder of the bag cassette.

In claims 3 and 7, measures for closing the filled bags are specified and in claim 8, facilities for a perfect final separation of the bags from the subsequent bags are mentioned.

The invention is explained in more detail below with reference to the drawing. 1 shows an overall perspective view of the device according to the invention;

2a shows a device according to the invention for packaging the container filled with the preparation and hazardous waste in a bag each, which is still unopened here;

2b device according to the invention as in FIG. 2a but in the opened position of the bag which is ready for filling.

Fig. 3 is a bag cassette and means for removing individual bags.

In FIG. 1, a safety workbench 1 known per se is shown only schematically with a work space which is shielded from the operator by a front pane 2. Below the front window 2, a working opening 3 is left open, which is provided as an arm engagement opening for the operator.

FIGS. 1, 2a and 2b show that a device 4 with a passage opening 5 is pivotally attached to the safety workbench 1 via a holder 7, so that the device 4 in front of the working opening 3 or during the preparation thereof by at least 90 ° can be pushed away. The device 4 also consists of a housing 8 on which a bag cassette 9 with a bag roll 10 (FIGS. 2a, 2b) is held by an insertion groove 11. The bag roll 10 consists of a plurality of bags 6 arranged one behind the other, the back of which forms an endless belt 6a (FIG. 2b). The housing 8 is a hollow body which surrounds the rectangular passage opening 5 and which contains a pair of rollers 12, a guide plate 13 and the gripping, closing and separating device. The pair of rollers 12 is driven by a motor 17 with a control unit, pulls the bags 6 off the bag roll 10 and guides them through a passage in the housing 8 to the guide plate 13, which redirects the bags 6 behind the passage opening 5. They happen on the way there Bags 6 the gripping device 14, which has two arms which grip like tongs. Each bag 6 is provided with a tab 18 which is gripped and held by the gripping device 14. The gripping device 14 is assigned to the threaded spindles 19, which can be driven and move the gripping device 14 with the gripped tab 18 downward, the bag 6 being opened. The bag opening 6b (FIG. 2b) then faces the working and passage opening 5, so that the container filled during preparation in the work space of the safety workbench 1 and the waste can easily be transported separately into the opened bags 6.

When the bags 6 are filled, the gripping device 14 is moved upwards again, the bags 6 being closed and sealed by the welding unit 15. Of course, the closing of the bag 6 can also be achieved by gluing.

The filled and sealed bags 6 are then separated from the subsequent bag belt by a welding wire 16 and placed on the collecting tray 20. The separation can also be done by a conventional cutting device.

Finally, the filled, sealed, separated and deposited bag can be removed for further use.

It should also be pointed out that above, bags are to be understood to mean containers of various shapes, e.g. with a tapered shape and bag-like or bag-like shape.

Fig. 3 shows a bag roll 1 arranged in a housing-shaped bag cassette 5. The rolled-up tape consists of bags 2 and a carrier tape 3, the carrier tape 3 simultaneously representing the rear wall of the bag.

The bags 2 are provided with tabs 4. In the exit area of the bag cassette 5, a pair of rollers with a driven roller 6 and a rotating roller 7 forming a nip is arranged. An insertion groove 5a is provided between the outlet area of the bag cassette 5 and the pair of rollers 6, 7 Holder of the bag cassette 5 arranged. The bag for infestation is opened via the tab 4.

Following the clamping gap, a separating unit 8 is provided which cuts the carrier tape 3 between two bags and releases the bag 2 for further use. Via the tab 4 it is possible to open the bag for filling.

The withdrawal of the bag roll 1 with the pair of rollers 6, 7 is set via a control unit 10 acting on the drive motor 9 of the roller 6. Of course, the removal of the bags from the roll of bags can also be done by hand, a limitation of the withdrawal length corresponding to the bag length being adjustable by a locking device.

In the area of the bag opening 11, a self-adhesive surface 12 can be provided on an inside of the bag 2, the cover of which can be removed after the bag 2 has been filled, so that the self-adhesive surface is pressed against the opposite wall of the bag 2 and the filled bag 2 is closed can be. Of course, this can also be achieved by welding the bag opening. Finally, the filled bag 2 is separated from the subsequent bags by a separating unit 8, wherein a welding or cutting device can be provided as the separating unit 8.

Of course, the carrier tape 3 can be provided with a predetermined breaking line in the area in which the bags 2 are to be separated between two bags, an additional separation unit then possibly being unnecessary. The control unit 10 can be switched on and off via a switch 13. For operational reasons, the switch 13 should be designed so that it can also be operated with the elbow if necessary.

The bags of the invention are usually made of plastic such. B. made of polyethylene, but other materials commonly used for bags can be used. There are many possible uses for the bags according to the invention. They are particularly suitable for food and pharmaceuticals, for bulk goods or the like and for the absorption of waste.

Furthermore, they can be used for packaging bacteriological, carcinogenic and contamination-prone substances, as mentioned in DE 19924857 A1.

Bags are understood above to mean all containers which enclose a fillable space, are open on the one hand and, viewed from the side, have an approximately rectangular side surface or are triangular and taper to the bottom.

Claims

claims

1.) Process for the preparation of dangerous substances such. B. bacteriological, carcinogenic or contamination-prone substances on a safety workbench, in the work space of which the substances are introduced into a container and an undesirable leakage of the substances is prevented by negative pressure conditions in the work space and the smallest possible opening that allows operation, after which the filled containers and hazardous waste from the work space can be filled through the work opening and the passage opening of a device into a second container, which is kept open in the filling position behind the work opening by this device and is used for further use after the filling process has been completed, characterized in that

that the second container is a bag that comes in from a roll of bags

Pulled off the shape of a band of bags and passed behind the passage opening of the device that a tab of the bag is gripped by a gripping device and through

Pulling the flap the bag is opened vertically, that the bag opening is kept facing the working opening and the passage opening of the device, that the filled bag is glued at the end of the filling process,

Welding or the like is closed and separated from the bag belt, and that the bag after separation in a drip tray for further

Ready to use.

2.) Method according to claim 1, characterized in that the bags made of plastic such. B. Polyethylene can be produced.

3.) Device for performing the method according to claim 1 for the preparation of dangerous substances, such as. B. bacteriological, carcinogenic or contaminant substances consisting of a safety workbench (1) with a work space that is delimited by a movable front pane (2) that is raised during operation to such an extent that a work opening (3) is created for the operator, the cleaned clean air flowing through the work space and Vacuum creates a vacuum, a device (4) for packing the container filled with the preparation and the hazardous waste into a second container (6) each of a passage opening (5) provided in the device (4), which is approximately vertical in front of the work opening runs and an opening (19) of the second container (6), which lies behind the passage opening (5) of the device (4), characterized in that the passage opening (5) of the device (4) is rectangular and by a housing (8 ) is framed that as second containers (6) bags are used, which are provided on a bag roll (10), that a pair of rollers (12) for pulling off the bag n (6) in the form of a bag band (6a) from the bag roll (10), the pair of rollers (12) pushes the bags (6) over a guide plate (13) behind the passage opening (5) of the device (4), that each bag (6) is provided with a tab (18) which is gripped by a gripping device (14), the gripping device (14) opening the bag (6) behind the passage opening (5) of the device (4) a closing device (15) for the filled bags (6) for sealing or welding the bag opening (6b) is arranged and that a separating unit (16) is provided for separating the filled and closed bags (6) from the moving bag band.

4.) Device according to claim 3, characterized in that the housing

(8) is a hollow body which forms the rectangular passage opening (5) of the device (4) and the pair of rollers (12), the guide plate (13) and the gripping (14), closing (15) and separating unit (16) takes up in itself and has an opening as a passage for the bags (6).

5.) Device according to claims 3 and 4, characterized in that the housing (8) by means of a holder (7) on the safety workbench (1) is pivotally attached.

6.) Device according to claim 3, characterized in that the bag roll (10) consists of a plurality of bags (6) arranged one behind the other in the form of a band, the back of which forms an endless carrier tape (6a).

7.) Device according to claims 3 or 6, characterized in that the bag roll (10) in a closely surrounding bag cassette (9) is arranged.

8.) Device according to one of claims 3 to 7, characterized in that the housing (8) has an insertion groove (11) through which the bag cassette (9) is held in the region of its outlet opening.

9.) Device according to claims 3 and 4, characterized in that a motor (17) is provided with a control device through which the withdrawal of the bags (6) from the bag roll (10) is controlled.

10.) Device according to claims 3 and 4, characterized in that the gripping device (14) has two pliers-like gripping arms and is arranged on two parallel drivable threaded spindles (19) which the gripping device (14) after the bag flap (18 ) move downwards and open the bag (6), and that to close the bag (6) the threaded spindles (19) move the gripping device (14) up again, where the bag flap (18) is released

n

11.) Device according to claims 3 and 6, characterized in that each bag (6) on its inside in the region of its opening (19) has a self-adhesive strip-shaped surface covered by an adhesive strip, which closes the bags (6) after their Filling allows.

12.) Device according to claims 3 and 4, characterized in that the bags are closed by a welding device (15).

13.) Device according to one of claims 3 to 12, characterized in that behind the passage opening (5) and at the level of its lower edge, a collecting tray (20) for receiving the bag (6) is attached during the filling and final separation process.

14.) Bag roll for carrying out the method according to claim 1 or 2 and for operating the device according to one of claims 3 to 13, consisting of a plurality of tapes arranged in a row one behind the other, which are removable from the bag roll, characterized in that the bags ( 2) consist on the one hand of an endless carrier tape (3) which forms the back of the bags (2) and have a tab (4) for opening the bags (2) before they are used.

15.) Bag roll according to claim 1, characterized in that the bag roll (1) arranged in a closely surrounding bag cassette (5) and the bags (2) can be removed from there by a pair of rollers (6,7).

16.) Bag roll according to one of the preceding claims, characterized in that the bags (2) on the inside in the region of their opening (11) have a self-adhesive strip-shaped surface (12) which is covered by an adhesive strip and which closes the bags (2). after filling them.

17.) Bag roll according to one of the preceding claims, characterized in that a motor (9) and a control unit (10) are provided, through which the withdrawal of the bags (2) from the roll (1) by the pair of rollers (6,7 ) is controlled.

18.) Bag roll according to one of the preceding claims, characterized in that the bags (2) with the carrier tape (3) made of plastic such as Polyethylene are made.

19.) Bag roll according to one of the preceding claims, characterized in that an insertion groove (5a) is provided for holding the bag cassette (5) in the region of the outlet opening of the bag cassette (5).

20.) Bag roll according to one of the preceding claims, characterized in that the bags are welded or clamped after filling.

21.) Bag roll according to one of the preceding claims, characterized in that the filled and closed bags (2) can finally be separated by a separating unit (8) from the following bags (2), the separating unit being designed as a cutting or welding device.