EP1002741A1 - Infusion bag with one compartment, especially for tea and process for its manufacture - Google Patents

Abstract

The thread(19) of the teabag is located inside the chamber containing the tea with its free first end(20) permanently connected to the transversely extending hot seal of the teabag's bottom end(9), and with its second end(21) passing through the transversely extending hot seal of the top end(10) and withdrawable from the chamber. Outside the chamber the thread is connected to the tag(22), especially through hot sealing, with the tag lightly attached to the teabag. An Independent claim is included for a procedure for the manufacture of a single-chamber teabag which includes the aforesaid positioning and attachment of the thread in the teabag.

Description

The invention relates to a single-chamber infusion bag made of heat-sealable Filter paper material, especially for making tea, with a Chamber containing substance quantum, at its head end and at its Foot end is closed by a transverse heat seal, whereby a thread with a label is attached to the infusion bag. The invention further relates to a method for producing such single-chamber infusion bags, especially for tea.

Single chamber infusion bags can be in the form of tubular bags, three-side sealed Bags or four-side sealed bags can be made. The Thread and label attachment is usually done such that on Head end of the single-chamber infusion bag attached to one end of the thread is, for example with a metal clip or by sealing on the cross ongoing heat sealing of the bags sealed by heat sealing. It is also known to the thread with one end at the head of the Glue on the infusion bag using a separate adhesive strip or sew the thread on, in all cases the other end of the thread is provided with the label.

A disadvantage in all cases is the complex, technically complicated and therefore expensive connection technology, which prevents a production with high Outputs of more than 500 infusion bags per minute are possible by machine is. Another disadvantage is the risk of changes in taste of the infusion by the metals, adhesives and others to be used Fasteners. Regarding the packaging and later handling of each single infusion bag is finally the placement of the thread and that Exposing the thread by the user is a problem that is usually caused by external looping of the thread around the bag in a less than optimal way is solved.

In view of this prior art, the invention is based on the object , while avoiding the disadvantages mentioned, of creating a single-chamber infusion bag which has no exposed thread in the packaging state and fastening the thread with a label without an additional fastening means, i.e. only using the materials necessary for bag production, which also enables continuous production on high-speed machines with capacities of up to 1000 bags per minute.

The object is achieved in a single-chamber infusion bag of the type mentioned in that the thread is housed in the interior of the chamber, its first free end is fixedly connected to the transverse heat sealing of the foot end, its second end by the transverse heat sealing of the head end or can be pulled out of the chamber adjacent and is connected outside the chamber to the label, in particular by heat sealing, which is easily attached to the bag by sealing. The thread is preferably arranged in the form of a loop in the interior of the chamber and can therefore be pulled out over a greater length. If it is a single-chamber infusion bag in the form of a tube, it is expedient to attach the label to the chamber wall which is free from the central-longitudinal connection, in particular central-longitudinal heat sealing, required with this type of bag.

The outer end of the thread is advantageously placed as a loop and with the label inside an asymmetrical label fold Heat sealing connected, due to the asymmetrical folding longer sheet of the label is arranged outside and by two sealing points is attached to the bag with the protruding leaf end. So that's one ensures perfect label position securing and thread retention, can the user can easily remove the label from the bag, the thread pull as far as possible out of the chamber and onto the drinking vessel or the Fasten the jug and is finally also after the leaching process Expressing the used tea bag feasible by further Pull the lower transverse seam on the thread in the direction of the upper transverse seam of the bag is pulled and thus the bag is pressed together, with what the liquid is squeezed out.

For the continuous production of single-chamber infusion bags of the above described type, a method is proposed according to the invention that is characterized in that on an initially level heat-sealable filter paper web a label thread meandering, in particular running centrally around the longitudinal axis on the top of the web is placed and fixed that at regular intervals to each other on the Bottom of the web a number of labels are substantially congruent applied with the label thread on the top and fixed that by Each label has the thread gripped from below using a tool and through the filter paper web and the label on the Bottom, especially in the form of a loop, is pulled that then the loop is attached to the label and the label on the Filter paper web is attached by heat sealing, after which in itself known manner - if necessary after bulging their longitudinal edges - portioned substance quanta of the leached substance in uniform Spaces are placed on the filter paper web from the web continuous hose is formed and then the hose in regular intervals, each covering a quantity of substance in Transverse direction is heat sealed, and then the transverse heat seals be cut in the middle so that at the foot of the so formed The inner label thread is fixed in the heat seal remains while being pulled out of the chamber at the head end by the Heat sealing is performed.

The latter is preferably achieved in that the gripping of the thread from below through each label using the tool, in particular with a needle, through a hole in the label, the Pierce the filter paper web with the tool and the thread through it Opening is pulled, the opening in the cross heat seal so is positioned to pull the thread out of the chamber later is feasible. This brings the thread out of the chamber and the mobility of the thread for pulling out is ensured.

According to an expedient embodiment of the method, the Label thread on the filter paper web by two at a distance from each other punctiform heat seals attached, between which the thread from the tool, in particular from a needle, for Pull through the web and the label is gripped through. To this According to the preferred embodiment of the method, a Thread loop can be drawn with the label inside one asymmetrical label folding is connected by heat sealing, the protruding sheet end of the label attached to the bag by sealing points becomes.

Preferably, the two long sides of the hose during the Tube forming or after the tube forming with a after provided folding inside to increase the chamber volume enlarge. For this purpose, the flat filter paper web in front of the Thread support with linear knockouts in the longitudinal direction accordingly the number of folds intended for the folds become.

Finally, it may be appropriate to use the entire thread during the Processing process easily on the filter paper web by heating to either attach the web or thread, but so must be carried out so that the thread can easily loosen again by train and can be pulled out of the chamber later.

Fig. 1

einen Einkammer-Aufgußbeutel in perspektivischer Gesamtansicht, einem Schnitt gemäß Linie A-A und einem Schnitt gemäß Linie B-B;

Fig. 2

eine Vorrichtung zur Herstellung des Schlauchbeutels der Fig. 1 schematisch, insbesondere mit einer Faden- und Etikettanbringung;

Fig. 3

eine Draufsicht auf eine Filterpapierbahn zur Verdeutlichung der Herstellungsstufen des Vorfalzens, Fadenauflegens und Etikettaufbringens;

Fig. 4

einen Teilabschnitt von Etiketten in der Abwicklung von einer Etikettrolle;

Fig. 5

die Etikettaufbringung mittels einer Etikettwalze, die perspektivisch, in einer teilweisen Abwicklung und in Form eines Schnitts A-A dargestellt ist;

Fig. 6

in verschiedenen Positionen den Vorgang des Greifens des Etikettfadens mit einer Fadennadel, Hindurchziehen durch die Filterpapierbahn auf die Etikettseite (Unterseite), Schlaufenbildung und Befestigung am Etikett in einer Draufsicht sowie Schnittdarstellungen A-A und B-B und

Fig. 7

eine schematische Darstellung des Gebrauchs des Einkammer-Aufgußbeutels der Fig. 1.

Further details, features and advantages of the subject matter of the invention result from the following description of the associated drawing. The drawing shows:

Fig. 1

a single-chamber infusion bag in a perspective overall view, a section along line AA and a section along line BB;

Fig. 2

an apparatus for producing the tubular bag of Figure 1 schematically, in particular with a thread and label attachment.

Fig. 3

a plan view of a filter paper web to illustrate the manufacturing stages of pre-folding, thread laying and label application;

Fig. 4

a portion of labels in the processing of a label roll;

Fig. 5

the label application by means of a label roller, which is shown in perspective, in a partial development and in the form of a section AA;

Fig. 6

in different positions the process of gripping the label thread with a thread needle, pulling it through the filter paper web onto the label side (underside), forming a loop and attaching it to the label in a top view and sectional views AA and BB and

Fig. 7

1 shows a schematic illustration of the use of the single-chamber infusion bag of FIG. 1.

The one-chamber infusion bag 1 shown in Fig. 1 of the drawing made of heat sealable filter paper material and has two each other oppositely arranged chamber walls 2, 3 through Tube formation of a web 4 of the filter paper material result by the turned over two longitudinal edges 5, 6 to the longitudinal center 7 and there with each other by means of a central longitudinal knurled seam 8 or a central longitudinal heat seal are connected, the foot end 9 and the head end 10 closed by a transverse heat seal 11 or 12 respectively become. In this way, an enclosed space is being formed Chamber 13 formed which a substance quantum 14, namely a portioned Lots of tea, contains. The one-chamber infusion bag 1 is consequently at his both longitudinal sides 15 and 16 by means of tube formation without folds and seal-free, whereby the volume of the chamber 13 significantly is enlarged that a fold 17, 18 on each of the two long sides 15, 16 is formed, which is accordion-shaped in cross section and in the Chamber 13 of the bag extends inwardly. The folds 17, 18 are made so that the usual external dimensions of such Single-chamber tea bags are retained and therefore despite the increase of the chamber volume no increase in its length or width in Packaging condition is given. This ensures that Substance quantum T in chamber 13 excellently through the Infusion liquid is to be digested and the substances contained in it solve optimally.

Inside the chamber 13, a thread 19 is arranged in a meandering shape, one end 20 of which is fixed to the transverse heat seal 11 Foot end 9 is connected, while its other end 21 through the transverse running heat seal 12 of the head end 10 from the chamber 13 movable, namely extractable, led out and outside the Chamber 13 is connected to a label 22 by heat sealing. The label 22 consists of a rectangular paper strip with a heat-sealable coating that is asymmetrical in the transverse direction is folded and in the resulting interior with the loop-shaped second end 21 of the label thread 19 is connected. Due to the asymmetrical transverse folding, there is a longer one on the outside arranged label sheet 23, the projecting sheet end by two Sealing points 24 easily removable on the wall 2 of the bag by heat sealing is pinned.

The production of such a single-chamber bag and in particular the thread and Labeling can be seen from the following description of the Fig. 2 of the drawing, in the schematic of a device for manufacturing such bag is shown in a continuous process. From one The filter paper roll (not shown) is subtracted from the required quantity continuously withdrawn in the form of a filter paper web 25 and over a Pre-folding device 26 guided, with the linear knockouts 27 in Longitudinal direction corresponding to that for the later folds 17, 18 intended number of folding operations. Subsequently the filter paper web 25 is guided over a thread feeder 28 with which the label thread 19 continuously meanders around the longitudinal center is placed continuously on the top of the filter paper web 25, as FIG. 3 the drawing illustrates.

For this purpose, the thread 19 is continuously fed by a thread supply spool 29 withdrawn, the thread 19 placed on a roller 30 in a serpentine shape about the rotation of the roller in the direction indicated by an arrow Direction of rotation of the filter paper web 25 supplied. The filter paper web 25 will passed over the roller 30 and easily by means of a heater 31 warmed up. With the aid of a fixing roller 32, the thread 19 is on the filter paper web 25 lightly tacked on the top.

In the next station, labels 22 are fed to the underside the filter paper web 25 instead. The labels are from a label reel 33 in Form of a label web 34 removable, with an embossing in the station 35 of the labels and in the station 36 a perforation of the labels and a Cutting the labels can be done. The real one Labeling on the filter paper web 25 takes place by means of a Label roller 37 instead, on which the labels are fixed and then with the Label thread 19 are connected. The representation of the label web in FIG. 4 the drawing shows by scissor symbols at which point in the Hole punching and cutting station is cut and a hole 38 punched is, with a dashed line, the later asymmetrical kink or folding of the label is symbolized at this crease edge.

5 of the drawing are on the label roller 37 on the Filter paper web 25 labels 22 to be applied from below in series and with Distance from each other and thus in an arrangement that the interacting ensures with the thread 19 on the other side of the filter paper web 25. The thread 19 lightly sealed on the filter paper web 25 is additionally on the points marked "A" and "B" in the middle of the Filter paper web 7 as well as slightly offset off center firmly sealed, since a loop is drawn between "A" and "B" is provided for connection to the label, as described below will be. Between the fixed points "A" and "B" at "N" is that punched hole 38 recognizable on each label. Finally, Fig. 3 are the Drawing the two sealing points 24 can be removed, with which each label 22nd to the filter paper after performing the cross fold around the dashed line Line and the fixation of the loop of the thread 19 is attached. The Loop 39 drawn in dashed lines on label 19 is produced as follows:

The thread 19 is connected by a needle similar to a crochet hook between the Points "A" and "B" detected from below through hole 38 of the label Filter paper web 25 pierces upwards, with its hook according to FIG Drawing the thread 19 is detected and in the retraction movement by the Filter paper and pull the loop through downwards. The Movement of the needle 40 according to the arrows is indicated by a hollow fixing bolt 41 out. After the needle 40 the loop 39, released by a rotation of 90 °, if necessary, the Loop 39 to the rear opposite to the running direction of the Filter paper web 25 folded over, for which purpose a thread loop fold-over 42 Fig. 6 of the drawing is provided. Then the label 22 folded asymmetrically and the thread loop sealed in the label, after which the label itself on the filter paper with the two sealing points 24 is pinned. The label flipper is in Fig. 6 of the drawing with the Reference numeral 43 is drawn schematically.

Fig. 6 of the drawing shows the processes of the in four different positions Threading, pulling the thread through the filter paper web and that Label, loop formation, thread folding and label folding. in the Another manufacturing process is as described above prepared filter paper web 25 then fed to the dosage 44, in which Tea portion heaps are placed on the filter paper web. Subsequently the longitudinal seam is produced at 45 by tube forming and one or several gussets 17, 18 folded and the cross seals carried out. In the subsequent cutting is shown in FIG. 3 of the drawing the symbolized scissors to ensure that the cuts in the Cross seals are made in such a way that the lower end of each bag Fixation of the thread 19 is retained and at the head of each bag flexible passage of the thread 19 when pulling out the label is ensured. The function shown in FIG. 7 of the drawing is then guaranteed.

Fig. 7 of the drawing shows the state of use of the invention Bag after the user has detached the label 22 from the bag itself and the label thread 19 in full from inside the chamber has pulled out, so that hanging in a teapot 46 to Leaching is possible. After "pulling" the tea in the liquid is completed, the bag 1 is pulled up from the tea water, whereby it has the normal shape drawn below the jug. Subsequently the user can squeeze the bag 1, i.e. squeeze out the liquid, by using the can opening or the can lid as an abutment and pulls on the thread 19 with the label 22. Since the thread 19 on the lower transverse heat seal is attached, this is going in the direction pulled onto the head end of the bag and thus the bag 1 pressed together, as the lower drawing in Fig. 7 illustrates. By this pressing process, the liquid is pressed out of the bag and a drip-free removal from the can 46 can be carried out.

Reference list

1

Single chamber tea bags

2nd

Chamber wall

3rd

Chamber wall

4th

train

5

Longitudinal edge

6

Longitudinal edge

7

Longitudinal center

8th

Medium-length knurled seam

9

Foot end

10th

Headboard

11

Heat seal

12th

Heat seal

13

chamber

14

Substance quantum

15

Long side

16

Long side

17th

Folding

18th

Folding

19th

Label thread

20th

first free end

21

second free end

22

label

23

outer leaf

24th

Sealing points

25th

Filter paper web

26

Pre-folding device

27

Knockouts

28

Thread feeder

29

Thread supply spool

30th

roller

31

Heating device

32

Fuser roller

33

Label bobbin

34

Label web

35

Embossing station

36

Punching station

37

Label roller

38

Hole in the label

39

Thread loop

40

needle

41

Fixing bolt

42

Thread loop wrap

43

Label folders

44

Dosing device

45

Longitudinal seam production

46

teapot

Claims (10)

Single-chamber infusion bag (1) made of heat-sealable filter paper material, in particular for making tea, with a chamber (13) containing a quantity of substance (14), which is sealed at its head end (10) and foot end (9) by a transverse heat seal ( 11, 12) is closed, a thread (19) with a label (22) being attached to the infusion bag (1),
characterized,
that the thread (19) is housed inside the chamber (13), its first free end (20) is fixedly connected to the transverse heat seal of the foot end (9), its second end (21) by the transverse heat seal of the head end (10) or can be pulled out from the chamber (13) and is connected to the label (22) outside the chamber (13), in particular by heat sealing, which is easily attached to the bag (1) by sealing. Single-chamber infusion bag according to claim 1, characterized in that the thread (19) in the interior of the chamber (13) is loop-shaped and thus can be pulled out over a greater length. Single-chamber infusion bag according to claim 1 or 2, characterized characterized in that the label (22) on the chamber wall (2, 3) is attached that is free of the necessary with this type of pouch Middle-longitudinal connection, in particular middle-longitudinal heat sealing. Single-chamber infusion bag according to one of claims 1 to 3, characterized characterized in that the outer end of the thread (19) as a loop (39) placed and with the label (22) inside an asymmetrical Label folding is connected by heat sealing, which is due to the asymmetrical folding longer sheet of label (22) arranged outside and by two sealing points (24) with the protruding leaf end is attached to the bag (1). Process for the production of single-chamber infusion bags according to one of the Claims 1 to 4, characterized in that initially on one flat heat-sealable filter paper web (25) a label thread (19) meandering, especially in the center of the longitudinal axis the top of the web (4) is placed and fixed in that regular Clearances to each other on the underside of the web (4) a number of Labels are essentially congruent with the label thread (19) the top is applied and fixed so that each label (22) the thread (19) is gripped from below by means of a tool and through the filter paper web (25) and the label (22) pulled onto the underside, in particular in the form of a loop (39) is that the loop (39) is then attached to the label (22) and the label (22) on the filter paper web (25) by heat sealing is attached, after which in a known manner - if necessary after Bulging of their longitudinal edges (5, 6) - portioned substance quanta (14) of the leached substance at regular intervals on the Filter paper web (25) are deposited, a continuous from the web Hose is formed and then the hose in regular, each a substance quantum (14) in the transverse direction is heat sealed, and then the cross heat seals in the middle be cut so that at the foot end (9) of the so formed The inner label thread (19) in the heat seal remains fixed while he is at the head end (10) from the chamber (13) is pulled out through the heat seal. A method according to claim 5, characterized in that the gripping the thread (19) from below through each label (22) by means of Tool, especially with a needle, through a hole (38) in the label (22) is carried out, the filter paper web (25) with the Pierced the tool and pulled the thread through this opening with the opening in the cross heat seal positioned so that a later withdrawal of the thread (19) from the chamber (13) is feasible. A method according to claim 5 or 6, characterized in that the Label thread (19) on the filter paper web (25) by two at a distance punctiform heat seals (24) is attached, between which the thread (19) of the tool, in particular of a needle, for pulling through the web (4) and the label (22) is gripped through. Method according to one of claims 5 to 7, characterized in that that the two long sides of the hose during the Hose shaping or subsequent to the hose shaping with a inwardly extending fold (17, 18) to be provided to increase the chamber volume. Method according to one of claims 5 to 8, characterized in that that the flat filter paper web (25) before the thread support with linear knockouts (27) in the longitudinal direction corresponding to that for the folds (17, 18) provided number of folding operations becomes. Method according to one of claims 5 to 9, characterized in that that the entire thread (19) is light during the processing process on the filter paper web (25) by heating either the web (4) or the thread (19) is attached, but this is so must be carried out that the thread (19) by train again loosen easily and pull it out of the chamber (13) later.

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