EP1164089A1 - Tea bag and method for closing such a bag using a string - Google Patents

Abstract

The infusion bag in the top section(6) has two laterally spaced perforations(8,9) lying to the left and right of the bag's longitudinal axis and which pass through a folded-in corner and middle portion of the top section. The thread(3) to form a loop(3a) is guided by one end through one perforation and by its other end through the second perforation. The loop is laid over the top edge(10) of the infusion bag and both ends(3b,3c) of the thread are guided from below through the loop to form a doubly secured knot. An Independent claim is included for a procedure for the sealing of an infusion bag.

Description

The invention relates to an infusion bag, in particular for tea, which has a head part with folded corners and a folded middle part on which a thread with two free ends is attached, which is from one side of the Headboard through a hole forming one on the other side of the headboard arranged loop is passed through and returned, the two free ends from below through the one placed over the top edge of the infusion bag Loop are pulled through and form a knot by tightening. The The invention further relates to a method for closing at the head end closed corners and subsequently folded middle part closed Infusion bag, especially for tea, preferably by one on the other End the thread to be labeled with two needles.

It is known to seal infusion bags only with a thread. For this purpose, the corners of the infusion bag are first folded over and then folded the middle part over the folded corners, so that a reliable closure of the infusion bag results. This closure is through secured a thread, there are several ways to attach it.

In a known embodiment according to German utility model 296 13 448 is the thread applied to the head part of the infusion bag by means of a separate fastening thread attached. This connection of the thread end with the infusion bag cannot withstand higher loads procedurally complex.

In order to create a simpler thread attachment, it is known from EP 0 807 579 known to provide the folded headboard with two recesses and To arrange the infusion bag next to a tensioned thread in such a way that The height of the recesses runs and one through each of the recesses Catch needle can be passed through, which take up the thread and through the Pull through the recesses with both ends. The free ends of the thread passed through the recesses of the infusion bag attached to the label, for example by welding or tacking. Disadvantageous is that the attachment is loose and therefore unsafe and the possibility there is that the folded areas of the head part unfold, so that the Contents of the infusion bag can fall out or a loss of aroma and freshness can occur.

A thread closure is also known from EP 0 691 268, in which a only hole in the head part of the infusion bag a needle is passed through captured a thread behind it and through the opening to form a Pulls back the loop, which is then used to form a knot. The disadvantage here is that it is not ensured that the folded corners and the middle part of the head part folded over with each other and with the bag the thread connection are detected and connected by the knot formed become. The closure is even with high manufacturing precision when folding, Punching and not sufficiently secure when threading.

The invention has for its object to ensure a secure fixation of the folded parts of an infusion bag with each other and with the bag itself by a thread connection that can be easily attached with little technical effort at high production speed.

The object is inventively achieved in an infusion bag of the type mentioned in that the bag is arranged holes in the head part has two laterally spaced side by side on the left and right of the longitudinal axis, which each extend through a folded-in corner and the center part of the head part that the yarn under Formation of a loop with one end through one hole and with the other end through the second hole that the loop is placed over the top edge of the infusion bag and both ends of the thread from below through the loop to form a double-secured knot are. The loop is preferably formed from cross-over thread parts, a short and a long thread end can be provided, in particular for attaching labels to the long thread end, and wherein to increase the security of the knot the short thread end in the preferred embodiment in the cross-over thread parts the loop is arranged beneath the long thread end against the bag wall. The invention provides a secure fixation of the folded corners and of the middle part folded over them with each other and with the bag, a simplified manufacture resulting from the fact that the comparatively thick and thus difficult to machine central longitudinal seam of conventional bags does not have to be pierced or perforated . The connection itself through the knot is doubly secured against loosening by the spaced two holes and the separate passage of the thread ends, so that even if one thread end should come loose from the loop, the knot through the second thread end and the additional looping thereby provided holds securely.

The procedural solution to the problem of the invention is in further development of the known method mentioned in the introduction characterized in that the end of the thread in a loop over a Recess of a holder is placed that the head part of the infusion bag in the Holder is inserted and the loop of the thread here around the The top edge of the infusion bag places the thread on its free one End and at its long, continuous part by two the folded over Parts penetrating holes in the head part is detected and the free end as well continuous part first in a loop and then completely out of the Infusion bags are pulled out and that the wrapping of the thread finally tightened by train in particular on its continuous part becomes. For grasping the thread, two are preferably below the closed part of the loop needles penetrating the infusion bag used, the holder having guide openings for the needles can. To pull the thread through, it must be on the continuous part be cut off at the latest before the needles are withdrawn. The continuous part forms such a long thread end that for label attachment can be used.

The method according to the invention closes the folded head part of the Infusion bag only with the help of the thread, so it is not on one Guide instructed. The thread is through the needles through the head part of the Infusion bag pulled or pushed, the bracket guide openings contains for the needles. The needles only lead to a simple movement Piercing the head part of the infusion bag so that a simple and faster movement is possible. Punch the headboard beforehand the infusion bag is unnecessary. The bag head is through the two stitches securely closed to the right and left of the center, including the folded corners be fixed. The attachment can be done in a continuous process be carried out when the machine is running smoothly and in large quantities. The Knot loosens due to the frictional forces even under low pretension means easy tightening, not.

Fig. 1a

eine perspektivische Ansicht eines Aufgußbeutels mit umgefalteten Ecken und darüber gefaltetem Mittelteil sowie Fadenverschluß;

Fig. 1b

den Aufgußbeutel der Fig. 1a mit einer vergrößerten Darstellung des Fadenverschlusses;

Fig. 1c

den Aufgußbeutel der Fig. 1a und 1b in unfertigem Zustand ohne Fadenverschluß;

Fig. 2a und Fig. 2b

eine Seitenansicht und eine Draufsicht auf einen in einer Halterung eingelegten Aufgußbeutel und auf einen zu einer Schlaufe gelegten Faden;

Fig. 3a und Fig. 3b

eine Seitenansicht und eine Draufsicht, in denen die Nadeln den Aufgußbeutel durchstochen haben;

Fig. 4a und Fig. 4b

eine weitere Seitenansicht und eine Draufsicht, in denen die Nadeln zurückgezogen worden sind;

Fig. 5a und Fig. 5b

eine Seitenansicht und eine Draufsicht des durch den Faden verschlossenen Beutels;

Fig. 6a und Fig. 6b

eine Seitenansicht und eine Draufsicht auf ein Etikett und das andere Fadenende;

Fig. 7a und Fig. 7b

eine entsprechende Seitenansicht und Draufsicht nach dem Durchziehen des Fadenendes;

Fig. 8a und Fig. 8b

eine weitere Seitenansicht und Draufsicht, bei denen die Fadenschlaufe in Einschnitte des Etiketts gelegt worden ist und

Fig. 9a und Fig. 9b

eine Seitenansicht und Draufsicht des am Etikett befestigten Fadens.

The invention provides a method for closing an infusion bag by means of a thread, which method works with simple technical devices and high working speed, and is explained below with reference to the drawings using an exemplary embodiment. The drawing shows:

Fig. 1a

a perspective view of an infusion bag with folded corners and folded middle part and thread closure;

Fig. 1b

the infusion bag of Figure 1a with an enlarged view of the thread closure.

Fig. 1c

the infusion bag of Figures 1a and 1b in the unfinished state without thread closure.

Fig. 2a and Fig. 2b

a side view and a plan view of an infusion bag inserted in a holder and on a thread laid to a loop;

3a and 3b

a side view and a plan view in which the needles have pierced the infusion bag;

4a and 4b

another side view and a plan view in which the needles have been withdrawn;

5a and 5b

a side view and a plan view of the bag closed by the thread;

6a and 6b

a side view and a plan view of a label and the other thread end;

7a and 7b

a corresponding side view and top view after pulling the thread end;

8a and 8b

a further side view and top view, in which the thread loop has been placed in incisions of the label and

9a and 9b

a side view and plan view of the thread attached to the label.

The infusion bag 1 shown in FIGS. 1a to 1c is initially shown in FIG. 1c on its head part 6 by folding the corners 1a and 1b and then Fold the middle part 1c closed, so that it is inside the chamber located substrate, especially tea, can not emerge. Subsequently the infusion bag 1 according to FIGS. 2a to 9b with a thread closure 7th provided, the construction of which in particular Fig. 1b can be easily removed. For Formation of the thread closure 7 are two in the head part 6 with lateral Distance next to each other to the left and right of the longitudinal axis of the bag Holes 8 and 9 formed, each a folded corner 1a and 1b and that Reach through the middle part 1c of the head part 6. To make this possible, according to FIG. 1c in the head part 6 of the infusion bag 1 with the middle part 1c not yet folded over A total of four recesses are provided after folding the middle section 1c correspond in pairs with each other and the one with the same axis Form holes 8 and 9.

The thread closure 7 also has a thread 3, which forms a Loop 3a with one end 3b through one hole 9 and with its the other end 3c is guided through the second hole 8, the loop 3a on the front of the bag 1 in the drawing and the ends 3b and 3c themselves located on the back of the bag 1 in the drawing. The loop is over placed the top edge 10 of the infusion bag 1 and the two ends 3b and 3c of the Thread 3 are guided from below through the loop 3a. By tightening one or at both ends of the thread a double secured knot 11 is formed, the corners 1a and 1b and the central part 1c of the head part 6 in the closed position fixed with each other and with the infusion bag.

From the drawing it can also be seen that the loop 3a crosses out superimposed thread parts is formed, being in the cross superimposed thread parts of the loop the short thread end 3b is arranged beneath the long thread end 3c against the bag wall.

For the manufacture of the closure described, the infusion bag 1 is in accordance with 2a and 2b with its closed head part 6 in a recess 2a a holder 2 inserted. Beforehand, the holder 2 is in the recess 2a Thread 3 has been laid in the form of a loop 3a, which is best shown in Fig. 2b is recognizable. The free end 3b of the loop 3a lies together with the continuous part 3c of the thread 3 on one side of the recess 2a, whereas the closed part of the loop 3a on the other side of the Recess 2a rests on the holder 2.

As can best be seen from Fig. 2a, the loop 3a is through the top edge of the infusion bag 1 pressed into the recess 2a, so that it wraps around the edge of the head.

3a and 3b penetrate two needles 4, which in FIGS. 2a and 2b in the Starting position are drawn below the loop 3a in the head part of the Infusion bag. They capture with theirs trained on the bottom Barb 4a (see Fig. 2a) on the one hand the free end 3b and on the other hand that continuous part 3c of the thread 3, as shown in FIGS. 3a and 3b.

If the needles 4 are now in the starting position according to FIGS. 4a and 4b withdrawn, take the free end 3b on the one hand and on the other hand a part of the continuous part 3c of the thread 3 with, as FIGS. 4a and 4b demonstrate. While the free end 3b completely from the head part of the Aufgußbeutels 1 is pulled out, has by the withdrawal of corresponding needle 4 in the continuous part 3c of the thread a loop 3d formed, which lies below the middle part of the loop 3a. This situation is clearly shown in Fig. 4b.

Now to the complete one shown in FIGS. 5a and 5b Wrapping the head part of the infusion bag 1 through the ends of the thread 3 to get there, it is still necessary to pass through part 3c, that is, the long one Pull the thread end of the thread 3 completely out of the infusion bag 1. This is done, for example, by further transport of the infusion bag 1, so that the remaining part of the continuous part 3c of the thread 3 completely through the Loop 3a is pulled through. By applying a certain pulling force on continuous part 3c of the thread 3 is finally the loop tightened so that the situation shown in Figs. 5a and 5b results.

For attaching a label 5 shown in FIGS. 6a to 9b to the other The end of the thread 3 is at its end 3e according to FIGS. 6a and 6b one side of the label 5 is placed. Preferably using one, again using Barbed needle, the label 5 is pierced and the thread 3rd detected at its thread end 3e. The thread end 3e is shown in FIGS. 7a and 7b in the form of a loop 3f pulled through the label 5.

This loop 3f is now detected and in slots according to FIGS. 8a and 8b 5a, which are formed in the edge region of the label. The closed part In this way, the loop 3f comes again on the same side of the label 5 to lie on which the thread end 3e and the continuous part of the thread 3 is located. This situation is best seen in Fig. 9a.

By exerting tension on the thread 3, the loop is finally wrapped around the label 5 is tightened so that the situation shown in Fig. 9b results.

As from the above explanations of both the closing of the Head part of the infusion bag 1 and the attachment of a label 5 to the both ends of a thread 3 emerges in both cases with simple Averaging the infusion bag 1 or label 5 reached, the Adhesion of the thread 3 is sufficient to reliably close the Infusion bag 1 or a reliable attachment of the label 5 to achieve.

Reference list

1

Tea bags

1a

corner

1b

corner

1c

Middle section

2nd

bracket

2a

Recess

3rd

thread

3a

loop

3b

free end

3c

continuous part

3d

loop

3e

Thread end

3f

loop

4th

needle

4a

Barbs

5

label

5a

slot

6

Headboard

7

Thread closure

8th

hole

9

hole

10th

Head edge

11

node

Claims (7)

Infusion bag (1), in particular for tea, which has a head part (6) with folded corners (1a, 1b) and a middle part (1c) folded over it, to which a thread (3) with two free ends (3b, 3c) is attached which is passed from one side of the head part (6) through a hole to form a loop (3a) arranged on the other side of the head part (6) and returned, the two free ends (3b, 3c) passing from below the loop (3a) placed over the top edge (10) of the infusion bag (1) is pulled through and form a knot (11) by tightening,
characterized in that two holes (8, 9) are arranged in the head part (6) with a lateral spacing next to each other on the left and right of the longitudinal axis of the bag (1), each of which has a folded corner (1a, 1b) and the central part (1c) reach through the head part (6) so that the thread (3) is guided with one end through one hole (9) and with the other end through the second hole (8) to form a loop (3a), that the loop ( 3a) is placed over the top edge (10) of the infusion bag (1) and both ends (3b, 3c) of the thread (3) are guided from below through the loop (3a) to form a double-secured knot (11). Infusion bag according to claim 1, characterized in that the loop (3a) is formed from cross-overly thread parts, one short (3b) and one long (3c) thread end being provided and the short thread end (3b) in the cross-over thread parts of the loop (3a) below the long thread end (3c) is arranged adjacent to the bag wall. Method for closing an infusion bag (1) closed on the head part (6) by folded corners (1a, 1b) and subsequently folded middle part (1c), in particular for tea, by a thread (preferably at the other end with a label (5)) 3) by means of two needles (4),
characterized in that the initially free end of the thread (3) is placed in a loop (3a) over a recess (2a) of a holder (2), that the head part (6) of the infusion bag (1) is inserted into the holder (2) is inserted and the loop (3a) of the thread (3) lies around the top edge (10) of the infusion bag (1), that the thread (3) is then at its free end (3b) and at its continuous part (3c) is detected by two holes in the head part (6) which penetrate the folded part (1a, 1b, 1c) and the free end (3b) and the continuous part (3c) first in a loop (3d) and then completely out of the infusion bag (1 ) are pulled out and that the loop of the thread (3) is finally tightened by pulling preferably on its continuous part (3c). Method according to claim 3, characterized in that two needles (4) penetrating the infusion bag (1) below the closed part of the loop (3a) are used to grasp the thread (3). Method according to one of claims 3 or 4, characterized in that the holder (2) has guide openings for the needles (4). Method according to one of claims 3 to 5, characterized in that the holder (2) is a gripper. Method according to one of claims 3 to 6, characterized in that the method is carried out continuously.

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