EP3527501B1 - Procédé de fabrication de sachets d'infusion - Google Patents

Procédé de fabrication de sachets d'infusion Download PDF

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Publication number
EP3527501B1
EP3527501B1 EP19153221.7A EP19153221A EP3527501B1 EP 3527501 B1 EP3527501 B1 EP 3527501B1 EP 19153221 A EP19153221 A EP 19153221A EP 3527501 B1 EP3527501 B1 EP 3527501B1
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EP
European Patent Office
Prior art keywords
label
thread
turret
bag
revolver
Prior art date
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Application number
EP19153221.7A
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German (de)
English (en)
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EP3527501A3 (fr
EP3527501A2 (fr
Inventor
Gerhard Klar
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Haussler and Sauter KG
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Haussler and Sauter KG
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Publication of EP3527501A2 publication Critical patent/EP3527501A2/fr
Publication of EP3527501A3 publication Critical patent/EP3527501A3/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B29/00—Packaging of materials presenting special problems
    • B65B29/02—Packaging of substances, e.g. tea, which are intended to be infused in the package
    • B65B29/04—Attaching, or forming and attaching, string handles or tags to tea bags

Definitions

  • the invention relates to a method for connecting a label to an infusion bag for infusion substances, primarily for tea, by means of a thread.
  • Machines for the production of so-called double-chamber tea bags are known. There are many details that do not need to be gone into. In particular, the shaping of the filter paper into a tube pre-filled with tea and the shaping of the kink in the bottom area have long been state of the art and are comparable and solved in a similar way in all known machines. There are also numerous solutions for the respective fixation of the thread to the respective component (label, bag), like modules that can be used like a modular system (knotters, knotters, staplers).
  • the invention therefore relates to a method that solves this problem in a particularly advantageous manner, with the entire process for the machine in its combination being decisive for the advantages of the technical solution, which ultimately leads to a newly designed tea bag machine. It is shown how the process of attaching the thread to a label and the transport and provision of the label, as well as the connection with thread, on which the label is located on the other side, can be advantageously designed. The movements and paths in the machine are designed in such a way that this mutual task is particularly effective.
  • the bag is machine made as it would be made by hand.
  • the workflow begins with the folding of the bag and the thread and label are attached to it in subsequent steps.
  • a turret device consists of at least two turrets that are driven in rotation independently of one another, namely a central turret, which is moved in cycles past a number of work stations distributed around the circumference, the central turret first a label is fed and then the bag and that the bag is fed to the label in the central turret ( figure 8 ).
  • a label revolver cannot be realized with such a rocker arm, because a label revolver has a defined receptacle for the labels and can work intermittently, at a significantly higher speed than a single rocker arm, which is shown in the publication.
  • the publication mentioned does not show a method in which a label turret driven in rotation in cycles is provided, which is suitable for producing the labels, the labels on the label train remaining on the label train and still connected to the label train until they have been entered into and fixed in the label turret transported until they are fixed in the label turret.
  • the label attached to the thread is pulled from the previous label hanging on the thread to a point from where it is pushed with a pusher along a path corresponding to the thread length into the turret device.
  • the arrangement with the exclusive transport of the label on the thread is associated with higher speeds with increasing accelerations and thus mechanical loads that place high demands on the material qualities.
  • a preferred aspect of the invention relates to an arrangement that enables the label and thread to be reliably guided almost exclusively in grippers, even at higher speeds.
  • a disadvantage of the device mentioned is, as explained above, that the closure (head closure) of the double-chamber bag is carried out when the machine is idle and not during the ongoing production process of the double-chamber bag.
  • the folding operations of the bag head are relocated to an area that lies before the linking operation, which can take place, for example, in a separate station or in the turret movement.
  • the DE 24 05 761 B1 shows the formation of the head breech during the barrel of the revolver.
  • no label turret is assigned to the central turret, but the labels are fed in a channel via the tensile force on the label thread, which is associated with disadvantages.
  • the use of a label revolver according to the invention has the advantage that machine safety is provided because the labels are not left to their own devices, but are immediately transferred back to fixed mechanical pliers after they have been cut and can be inserted into their secure gripper mechanism in the uncut state and be further processed in cycles corresponding to the cycle of the label turret.
  • a turning arm is unfavorable for high-speed machines.
  • a needle-shaped tool is used and not a turning-in arm, because the thread cannot be grasped but rests directly on the label.
  • the pamphlet DE 600 29 184 T2 shows a label turret which is driven in rotation in cycles and which is suitable for the production of labels.
  • the tag turret has vacuum seats located on its outer surface for positioning and receiving the thread and tag tags. This describes a vacuum-supported mounting of the parts mentioned, but not a recording in clamping pockets, as described by the present invention. Therefore affects the DE 600 29 184 a machine for heat-sealable material contaminated with plastics and is therefore not able to make bags from plastic-free filter paper or to connect thread and label to the bag by tying them together.
  • the problem to be solved by the present invention is based on the DE 20 27 167 A1 seen in ensuring a secure positioning of the labels during feeding.
  • the bag and the label also form easily controllable components, while the thread is much more difficult to control and to bring to the exact place where it can be securely grasped for attachment. That is why the thread guide particular attention is paid to this, especially since the outlay on machines is also to be kept to a minimum here.
  • the label is first fed to the central turret and then the bag, and that the bag is fed to the label in the central turret.
  • the labels on the label line remain on the label line until they have been inserted and fixed in the label turret and are transported while still connected to the line until they are fixed in the label turret.
  • the thread length that can be adapted to changed bag sizes enables the machine to be set up in series, because the subsequent format decision regarding different bag shapes and sizes can be made with little adjustment.
  • knots are not formed on a label (17) that has been separated beforehand, but rather the label (16) to be processed is still attached to the label strand (14) during the entire process of feeding and removing and also during knot formation.
  • Thread brakes have the task of gripping the thread just enough to fix its position but still allow it to be easily pulled through. Furthermore, where possible, the thread is guided in grooves, channels, slots or the like, without this being described in detail each time. When the thread is drawn in from a tangential position in the direction of the center, the thread quality and tension may not always be sufficient. Then it is easily possible to open the brake mechanically. Where this could be advantageous in rotating parts, a possibility of controlled brake opening is shown.
  • the advantage of the preferred embodiment is that the critical transport processes of the label only take place when the label is still on the undivided label strip and not in an individual position.
  • the label is only pushed over a short distance, which has the advantage that due to the short transport distance neither a jamming of the label nor a disadvantageously long transport is connected.
  • processing of the label is carried out in a bound transport mode, ie as long as the label is hanging on the label strip, longer transport of the individual label over longer transport distances is avoided. Above all, transport of the label by pulling on the label thread is avoided.
  • the bag must be fixed in the turret during rotation and opened during loading and unloading of the bag. For this purpose, a controlled movement must be introduced into the turret.
  • the head closure is made before the thread is attached to the bag head. Thus, there is no time constraint or undesirable delay as in the prior art.
  • the second part of the fold-over of the head closure takes place via a passive element, namely via a baffle.
  • the novel machine has a reduced number of functions compared to the prior art.
  • the stapled label is fed to the label turret 20 and a loop is made. It is important that the stapled label is fed to the central turret 12 and that it is mechanically clean and securely positioned.
  • the thread 18 attached to the label must be set to the correct length and mechanically guided throughout. He must always remain captive and tense. If the thread goes out of its guide, a disturbance occurs which must be avoided at all costs.
  • the thread 18 must therefore be guided permanently and also have the correct length. It must also be guided to the right point on the machine.
  • the thread guiding elements are largely passive mechanical elements (brakes and channels), which is important for the functionality of such a machine.
  • Fig.1 uses the example of a machine to give an overview of the arrangement of the work stations for a process for the production of bags for infusions. In order to better understand the context, only innovations are described in detail.
  • a clocked-driven turret device 2 is attached to a machine housing 1, on which work stations distributed around the circumference are arranged, as is customary in the aforementioned patents and in packaging technology.
  • the arrangement of the work stations is described as an example using an 8-part turret in the order of the successive work steps.
  • the process begins at the infeed station 3 and ends at the removal station 10.
  • the label 16, 17 with the thread 18 is introduced into the central turret 2.
  • the foremost label on the string of labels 14 is provided with the reference number 16, while each other individual label with or without an attached thread 18 is provided with the reference number 17.
  • the hose 60 is fed in as described above and below.
  • a metering device 120 known per se is shown on the left-hand side, with the tube 60 being formed in the forming station 121 .
  • the front part of the tube 60 is cut off with the cutting device 122 and is ready to be pushed into the central turret 12.
  • station 5 Between the feed station 4, where the hose 60 is introduced into the central turret 12, and station 7 with the stapling device, in which the bag is connected to the thread 18, the head closure of the bag carried out. This part is referred to as station 5, even if its function does not take place when the central turret 12 is stationary.
  • the turnover station 6 - i.e. the 90° turnover of the pre-folded head of the head closure - is carried out in the run (as a continuation of station 5, so to speak) and concerns the turnover of the upper flap of the bag head closure. This happens when the protruding upper flap is turned past Strap over the enveloping circle of the central turret 12 by a passive element, referred to herein as chicane 65 ( Figure 10).
  • the thread 18 is attached to the bag. This will be covered in a bit more detail later.
  • control station 8 it is checked whether the thread 18 is actually attached to the label 17 and the bag.
  • bagging station 9 This process is followed in the bagging station 9 by wrapping the bag with a "bag” made of paper (knurled side edges), plastic film (heat-sealed), or the like.
  • the turret device 2 rotates past the work stations 3 to 10 in the direction of the arrow 124 .
  • a wrapping film 11 is fed from a roll 125 in the direction of the arrow 127 by two conveyor rollers 128 to the wrapping station 9 .
  • the bag is pulled out in the surrounding bag station 9, then the surrounding bag film 11 is fed in, cut off and the bag, together with the surrounding bag film 11, is fed back between the clamping jaws of the central turret 12.
  • the previously mentioned feeding of the bagging film 11 is realized ( figure 1 ).
  • the infusion bag is removed in the removal station 10 and the outer bag surrounding it is closed if this has not already taken place in the outer bag station 9 .
  • the figures can then also be mirror images, ie the fixed arm with the folding prism, into which the label is inserted, can be arranged at the rear, seen in the running direction.
  • the thread loop 27 gives the thread 18 the length it needs to wrap around, knot, etc. the tea bag.
  • the thread 18 is gem. 1 from a thread roller 117 via a thread brake 25 ( Figure 2a ) and runs over a thread deflection 24.
  • the thread deflection 24 ( Figure 2c )
  • a needle 26 is located downstream and ensures that the thread 18 remains taut without a whiplash effect (ie no loops forming) and gets the specified length.
  • the loop formation by a rapid vertical movement of the needle 26 makes it possible that the label is not loaded with a tensile force, because the thread 18 is firmly clamped on one side in a clamping lever 22 and on the other side by the thread spool via the set Yarn brakes 24, 25 can be easily deducted.
  • the Figures 3a to 3d show the stapling of the thread with the label 17. If the stapling is to take place very close to the front edge of the label 17, design-related dimensions of the stapler 15 can make such stapling difficult to arrange the stapler 15 and the scissors 30 close enough to one another (the Figures 3a-3d let this be guessed at).
  • the position of the scissors 30 is fixed, since the foremost label 16 is to be transported in combination with the string of labels 14 . It is a declared aim of the invention not to transport the individual label 17 individually if possible. This is solved in that the innovation described here allows the stapler 15 to be mounted as far away from the scissors 30 as is desired for design reasons, without functional losses.
  • An advantage of the invention is therefore the feeding of the label 16, which is guided over a very long transport path bound in a label strand 14, the respective individual label being provided with the reference number 17.
  • the label is transported and processed almost continuously as long as the individual label 16 is hanging on the label strand 14 and the individual label 16 is only transported over a short transport path with the thread 18 attached to it from the label turret 20 to the central turret .
  • Figure 2a and 2b show the feeding of thread 18 and label 16, 17 into the label turret 20.
  • the work process begins - when the machine enters, with the feed of the label strand 14 and the thread 18 to the stapler 15. In this, the thread is tacked to the foremost label 16 ( Figure 2a ).
  • the labels 17 are not placed directly in the central turret 12, but via an interposed label turret 20, through which, as can be seen below, the thread 18 with the label 17 is turned upside down, which is important for thread guidance in the central Turret 12 is advantageous.
  • a label roll 13 ( figure 1 )
  • Coming string of labels 14 fed to a stapler 15, as for example from the DE 2 607 247 A1 is known.
  • a thread 18 coming from a thread spool 117 is carried along above the strand of labels 14 .
  • the stapler 15 of the thread 18 with the foremost Label 16 of the label string 14 is connected, the label string 14 is transported by a label length.
  • the Figure 2a 13 also shows a knot 131 (not drawn to scale), which is formed with the stapler 15.
  • the foremost label 16 with the thread 18 attached to it is cam-controlled by the movable clamping lever 22 and fixed against the fixed main beam 21 of the chamber 19 .
  • the thread 18 is using the possible free space in the stapler 15 at a slight angle 23 from the node 131 of the foremost label 16 to a thread deflection 24 and / or.
  • Yarn brake 25 guided ( Figure 2b ).
  • needle 26 continuously referred to as "needle 26"
  • it is drawn with a large diameter, so to speak as a symbol of the rod-shaped component, and possibly also has a small circle in the lower part as a symbol for the pointed needle 26.
  • Figure 2a shows the above mentioned needle 26 used to form a thread loop 27 ( Figure 2c ) serves.
  • the needle 26 is located beyond the scissors 30, which operate with the movable blade 28.
  • the enveloping circle of the label turret 20 is described with the reference number 86 .
  • the needle 26 pulls the thread 18 over a fixed edge 29 of the movable blade 28 of the scissors 30 and the fixed main bar 21 mounted in the label turret 20 to form a thread loop 27.
  • the thread 18 is held in place by a stationary thread brake 33, which, in order to facilitate lateral threading, is optionally opened under machine control and, as soon as the thread 18 has passed through it, is closed ( Figure 2c ).
  • Task of the thread brake 33 is a clean thread run.
  • the thread 18 in the thread loop 27 has reached the desired length, which is required for later fastening and wrapping around the infusion bag, the thread 18 is attached to the second label 17 of the label string 14 ( Figure 2c ).
  • the foremost label 16 is separated from the following label 17 together with the thread with the scissors 30.
  • the movable blade 28 is moved over the enveloping circle 86 of the label turret, as shown in FIG Figure 4b shown moved so as not to impede the later rotary movement of the label turret 20.
  • the label turret 20 is rotating in the direction of the arrow 132 ( Figure 2a ) is driven and now transports the label 16 clamped and knotted between the main beam 21 and the clamping lever 22 in the direction of the arrow 132 in the illustrated case by a rotation angle of 180° to the transfer point for the label in the central turret 12.
  • Advantage of the invention is the arrangement of an independent label turret 20, because it is a spatial unbundling of complicated technical processes is useful by spatially from the knot formation Central turret creates distance and thus the machine with little technical effort clearer and makes their maintenance easier.
  • the label 17 separated from the string of labels 14 is mechanically fixed along the entire path and is therefore very easily subject to a check before it can be fed to the central turret 12 from a secured position.
  • thread 18 and label can be moved to any point on the label in the longitudinal direction, including the front edge.
  • the first stapling begins with the label inserted at the desired stapling point ( Figure 3a ). After stapling, the label strip 14 is transported forward by one label length ( Figure 3b ).
  • the loop formation is, as from the figures 2 known, made, and the thread 18 is attached to the following label 17, which is in the correct stapling position (because it was transported further by exactly one label length). attached to ( Figure 3c ). Then the next step is the transport ( Figure 3d ) of the label string 14 into the pocket of the label turret as well figures 2 famous.
  • Figure 3d shows where the separation of the foremost label 16 together with the thread 18 takes place (similar to Figure 2c ). After separation, the second label 17 becomes the foremost label 16 on the label string 14. It has the thread 18 already attached. And when the scissors 30 open, the scissors blade 28 over the enveloping circle 86 of the label turret, as in Figure 4b shown, the scissor blade 28 does not impede subsequent rotation of the label turret 20.
  • FIG Figure 4b After the label fixed in the label turret 20 has been turned away, a state is reached as shown in FIG Figure 4b is shown: As already explained in the last section, the previously second label 17 has now taken over the position of the first label 16 . The string of labels 14 is now pushed further by so much until the second label 17 is the stapling position Figure 3b has reached. (If necessary, the feed with the rotational position of the label turret 20 must be coordinated in the time schedule.) From here, the further process continues periodically, as in the last section and in the Figures 3c and 3d described: the loop can be formed, the stapling is done, etc.
  • the additional components required for transporting the string of labels 14 can be inserted without any problems.
  • the conveyor rollers 128 for the transport of the outer bag film 11 are located.
  • the Figures 3 intended movements of the label strand 14 realize.
  • the invention also provides the important possibility, namely to fasten the thread 18 at any desired point on the label 16, 17, including in the edge region of the label 16, 17 in the longitudinal direction. That's what this one is for device after Figure 3a to 3d particularly suitable.
  • the Figures 3a and 3b show the same ratios that are based on the Figures 2a and 2b described, with the only difference that the node 131 is now located at the edge of the label 16, but otherwise the same reference numbers have been used for the same parts.
  • node 131 can be placed anywhere on label 16.
  • reference number 16 always designates the foremost label on the strand that has not yet been cut off
  • reference number 17 represents a single label with or without attached thread 18, usually the second on the label 16 following label, possibly also within the label strand or eg a single label in one of the turret pockets.
  • Figure 2b the individual label 16 that has not yet been cut off is shown, which is clamped in the clamping receptacle between the main beam 21 and the clamping lever 22 .
  • the figures 4 are used to show the state of the thread during the turret rotation, in particular its tautness, until it is caught in the thread brake 34.
  • FIGS. 4a to 4e show the further progress after the label 16 has been clamped in the chamber 19 in the label turret 20, delimited by the main beam 21 and clamping lever 22, the clamping lever 22 being designed to be pivotable via a pivot point 134 and its rotation being controlled by a cam disk 40 with an associated Cam 136.
  • the cam disk 40 can be designed in such a way that when the alternately driven disk is in the appropriate position, the chamber 19 with the clamping receptacle closes after the new label has been picked up and the pocket 19' opens for delivery of the label to be transferred to the central turret 12.
  • Thread brake 33 it is noted that it should be designed in such a way that the thread 18 is always kept taut.
  • the tensioned thread 18 becomes shorter, as will be explained later in detail. This shortening is compensated for by a controlled lifting movement of the needle 26 so that the thread remains taut.
  • Thread paths shown is a deflection 79 with a slight braking function.
  • This deflection 79 also has the task of keeping the thread 18 in the direction until, as in Figure 4d and Fig.5a shown, is detected by the channel 37 and the thread brake 34 in the label turret 20.
  • the 4a to 4e show the development of the thread length coming from the thread loop 27 in detail.
  • Fig.4b with thread 18d
  • Figure 4a Thine 18c
  • initially less thread 18 is used than is available. So that the thread 18 does not sag, but remains taut and able to be guided, the thread loop 27 is pulled back with the needle 26 so far that it takes up at least the length of thread that is released, so that the thread 18 is taut in the guide slots formed from the guide slot 37 and the thread brake 34 is introduced.
  • the Figures 4a-4e show the progressive position of the label during rotation with the label turret 20.
  • FIG. 4a shows the starting point of processing similar to in Figure 2c .
  • the moveable scissors blade 28 is moved out of the range of the enveloping circle 86 prior to rotation of the label turret 20, as shown in FIG Figure 4b shown.
  • Missing thread 18 is pulled out of the thread brake 33 via a deflection 79.
  • the thread 18 first lies against the individual label 17 up to its lower edge 74 ( Fig.4c ), before turning another approx. 40° ( Fig.4d ) rests on the surface of the open thread brake 34 and the bottom of the channel 37 of the label turret 20.
  • the clamping lever 22 supports the projections of the label up to about the lower edge 74 at the end against the tensile force occurring when the thread is being pulled.
  • the thread brake 34 in the label turret 20 can advantageously be opened and closed during rotation ( Figures 5a to 5e ). An opening may be desirable to facilitate threading and to ensure that the line 18 is actually fed into the brake.
  • Fig.5a is the thread 18 on its way from the deflection 79 to the lower edge 74 of the label on the bottom of the channel 37 and the (tangent) tapered pin 93 of the brake cylinder 90.
  • Fig.5b and - enlarged Fig.5c- show this situation on average.
  • the brake cylinder 90 is pushed out of the channel 37 by a lever 92 via the pin 93 with a smaller diameter, as a result of which the thread 18 can rest on the thin pin 93 .
  • the movement of the lever 92 is brought about by the cam 105 of a cup wheel 102 via a bearing point 138 rolling on the lever 92 . In this situation, therefore, there is no braking effect.
  • Figure 5d and 5e show that after the thread 18 rests on the pin 93, the cam 105 is left during further rotation.
  • the lever 92 and the brake cylinder 90 are moved towards the wall of the channel 37 by the compression spring 89 .
  • the thread 18 is pinched.
  • the pressing of the lever 92 against the cup wheel 102 can be supported with a greater force required by an additional compression spring 103, while the compression spring 89 is very light . This situation is in the Figures 5d and 5e to see.
  • Figure 4e shows the transfer position of the label 17 with thread 18 in the label turret 20.
  • the transfer to the central turret 12 shows Figure 6a .
  • the clamping of the label 17 in the label turret 20 is released and it is pushed, together with its thread 18, into the receiving slot 36 by a transfer element, for example a push-out lever 39.
  • the receiving slot 36 is formed from the main beams 41 , which are firmly connected to the central turret 12 , and the folding shoulders 47 .
  • the ejection lever 39 is pivoted into the interior of the label turret 20 on the path 139 and is ready again for the next machine cycle when the new label 17 arrives.
  • the thread 18a in Figure 6a shows the position of the thread 18 when the label 17 is still seated in the label turret 20, while the position of the thread 18b shows the same thread 18 when it is received in the central turret 12. Since the thread 18a between the thread brake 34 and label 17 in the label turret 20 is shorter than the thread 18b between the thread brake 34 and label 17 in the central turret 12, the missing thread 18 is pulled out of the channel 38 of the thread brake 34. The thread 18 remains taut and slides securely into the channel 38 of the thread catcher 32 .
  • the thread 18 is held by a thread holding pin 72, which is connected to a brake cylinder 99 ( figure 7c, 7d ), prevented from slipping out of the channel 38 when the central turret 12 is rotated further.
  • Figure 7b shows this on average.
  • the brake cylinder 99 connected to the thread holding pin 72 applies braking force to the thread 18, while the holding pin 72 prevents it from slipping out transversely to the direction of the thread, so that it Figure 7b can only be moved in its pulling direction.
  • the thread brake 35 ensures that the position of the thread 18 is secured for the formation of knots.
  • Figure 7c shows the thread brake 35 in the open state.
  • the thread 18 can slide in and out from any direction.
  • the opening is effected by a ram 98 which pushes the connected machine parts guide pin 101, yoke bridge 104, brake cylinder 99 with thread holding pin 72 out of the channel 38 against the force of the compression spring 97. Since the thread brake 35 is only actuated in holding positions, the control is problem-free. Should an extension of the thread catcher 32 together with its channel bring advantages, e.g. better directional stability with certain thread qualities, the thread catcher 32 could possibly extend beyond the enveloping circle of the in Figure 7a reach beyond the clamping bar 58 shown.
  • clamping bar 58 and thread catcher 32 represent a single part, which is only treated separately for the sake of better understanding.
  • the Figures 7a to 7c show that in order to later attach the thread 18 to the bag, the thread 18 must be provided at a precisely defined location.
  • the channel 38 in the thread catcher 32 is provided for this purpose.
  • the thread holding pin 72 which traverses the channel 38 of the thread catcher 32 behind the thread 18, is arranged at the front free end of the brake cylinder 99.
  • the thread holding pin 72 has the function that although the thread 18 can be pulled lengthwise, it can no longer slide out of the channel 38 laterally.
  • the Figures 7b and 7c also show a plunger (opener) 98, which controls the thread brake 35 in the thread catcher 32.
  • the brake cylinder 99 with the thread holding pin 72 is pressed against the wall of the channel 38 by the compression spring 97 via a guide pin 101 with a bridge 104 connected to it, as a result of which the brake cylinder 99 acts as a brake and the thread holding pin 72 holds the thread 18 securely in the channel 38 .
  • the plunger 98 in the thread catcher 32 opens the thread brake 35 by pressing the guide pin 101, such as Figure 7c displays. In this situation, the thread 18 can slide in to the bottom of the channel 38 in the thread catcher 32 .
  • the Figures 7a 6a and 6b show a side view of the course of the thread 18 caught by the thread holding pin 72 in different stages of the central turret 12.
  • the bags are formed from a band 62 coming from the roll 61 (eg filter paper) by placing pre-metered tea portions 63 from metering chambers with adjustable volume in portions.
  • the band 62 is folded around the tea portions 63 to form a tube 60 .
  • the foremost piece of tubing is separated from the tube 60 located above the pocket 75 of the central turret 12 and folded by a bottom folder consisting of sword and walls to form an upside-down "V", which will later become the bottom of the bag. Since these processes are well known, they are not shown.
  • the piece severed from the bag tube 123 is then drawn into the chamber 19 of the label turret 20 by the bottom folder. Since the thread 18 is guided on both sides of the chamber 19, on the one hand on the label 17 and on the other in the channel 38 of the thread catcher 32, it slides the bag that is forming passes between them, causing the thread to be wrapped around the bag.
  • the processes in the central turret 12 take place in an area in front of the turret wall, into which a main beam 41, which is firmly connected, extends.
  • the first independent movement is the pressing of the bag against the main beam 41 ( figure 1 ).
  • the bag to be closed lies in the pocket 75 in the central turret 12.
  • the clamping bar 58 which is connected to the working beam 44 via compression springs, is guided to the main beam 41 until the bag is clamped.
  • the stapling device With the attachment of the thread 18 to the head closure 51 of the bag, the latter is closed at the same time.
  • This is a stapler, known by DE 2 027 167 , which attaches the thread 18 to the bag.
  • the stapling device is in a waiting position outside the enveloping circle 87 until the bag has arrived at the stapling station 7 with the upper part of the bag head angled by 90°.
  • the stapler now swivels into the head area and folds the bag head by 180°.
  • the stapling happens as in DE1 522 496 A1 described, with the participation of a hook needle.
  • the reliable course of this process requires a precise position of the thread 18 at which the hook needle finds the thread 18 .
  • This is achieved by guiding the thread 18 in the channel 38 of the thread catcher 32 with the cooperation of the thread holding pin 72 and the thread brake 35 ( Figure 6a ).
  • the stapler makes a pitching movement at two different heights from its rest position above the enveloping circle 87 .
  • the head of the head closure is turned from 90° to 180° over the top edges of the flap, which also takes place without additional (controlled) machine components and controls.
  • the folding tongue 54 can be connected to the respective control disk 53 in one piece of material.
  • the control station 8 If the tea bag is placed either in an outer bag or a folding box for further processing, it is not subject to inspection. It is therefore checked in the control station 8 whether the thread 18 is stuck on the bag and on the label 16 .
  • the clamping bar 58 is opened slightly and the thread 18 is thus stretched between the bag knotting and the thread catcher 32 and loaded by a test lever. If the thread 18 takes the load and is tight, the test lever (not shown) will stop, but if the thread 18 detaches from the bag or label 17, the test lever falls deeper into the pocket 75 and triggers a jamming signal to the machine control. In the event of a fault, the controller causes the defective bag to be ejected as usual.
  • the bag is, as is generally customary, pulled out of the chamber 19, which is open for removal, with a pair of tongs. If necessary, the bag covered by the outer bag is transferred to a closure device or pulled through a corresponding device, for example heated rollers for heat sealing, if the connection has not already been carried out at the previous station.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Claims (7)

  1. Procédé pour fabriquer des sachets pour matières à infuser, selon lequel un dispositif à révolver (2) est constitué d'au moins deux révolvers (12, 20) entraînés en rotation indépendamment l'un de l'autre, à savoir un révolver central (12) que l'on fait passer de manière cadencée devant un certain nombre de stations de travail (4, 5, 6, 7, 8, 9, 10) disposées en étant réparties sur la circonférence, et un révolver d'étiquettes (20) également entraîné en rotation de manière cadencée, qui est adapté pour la fabrication des étiquettes (16, 17), dans lequel l'étiquette est tout d'abord amenée au révolver central (12) puis, à la suite, le sachet, et que dans le révolver central (12) le sachet est amené à l'étiquette (16, 17), caractérisé en ce que les étiquettes (16, 17) sur une ligne d'étiquettes (14) restent sur la ligne d'étiquettes jusqu'à l'entrée réussie et la fixation dans le révolver d'étiquettes (20) et sont transportées en étant encore reliées à la ligne d'étiquettes (14) jusqu'à ce qu'elles soient fixées dans le révolver d'étiquettes (20).
  2. Procédé selon la revendication 1, caractérisé en ce que lors du transport de l'étiquette (16, 17) avec un fil (18a, 18b) jusqu'à la station de transfert du révolver central (12), des variations de la longueur de fil dues au système sont compensées par des mouvements commandés d'une aiguille (26).
  3. Procédé selon la revendication 2, caractérisé en ce que pendant toute la course de l'étiquette (16, 17) avec le fil (18a, 18b) jusqu'à la station de transfert sur le révolver d'étiquettes (20), le fil (18a, 18b) est maintenu sur sa trajectoire prévue en étant tendu par un frein de fil (34).
  4. Procédé selon la revendication 3, caractérisé en ce que le fil (18a, 18b), lors du transfert de l'étiquette (16, 17) dans le révolver central (12), est introduit dans un dispositif de retenue de fil (32) par lequel, éventuellement avec le support du frein de fil (34), le fil (18a, 18b) est transféré sur un appareil d'agrafage (15) pour l'agrafage à une tête de sachet à un endroit prévu.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le parcours de l'amenée d'étiquette dans le révolver central (12) est réduit à environ la longueur de l'étiquette (16, 17).
  6. Procédé selon la revendication 4 ou selon la revendication 5 quand elle est dépendante de la revendication 4, caractérisé en ce qu'une formation de nœud sur l'étiquette (16, 17) a lieu dans l'appareil d'agrafage (15) pendant l'opération de l'amenée et de l'évacuation dans le revolver central (12) et en ce que pendant la formation de nœud aussi, l'étiquette (16) à traiter est encore accrochée à la ligne d'étiquettes (14).
  7. Procédé selon l'une des revendications 4 ou 6, ou selon la revendication 5 quand elle est dépendante de la revendication 4, caractérisé en ce que pendant le mouvement du révolver central (12), un pliage de tête de la tête de sachet (52) est préformé, et en ce qu'un temps d'arrêt du révolver central (12) est utilisé pour un mouvement de tangage de l'appareil d'agrafage (15) et un nouage du fil (18a, 18b) sur le sachet pour infusion.
EP19153221.7A 2018-01-24 2019-01-23 Procédé de fabrication de sachets d'infusion Active EP3527501B1 (fr)

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DE102018101570.4A DE102018101570A1 (de) 2018-01-24 2018-01-24 Verfahren und Vorrichtung zur Herstellung von Aufgussbeuteln

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EP3527501A3 EP3527501A3 (fr) 2019-12-11
EP3527501B1 true EP3527501B1 (fr) 2022-03-02

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EP3733383B1 (fr) * 2019-05-02 2022-12-21 Teepack Spezialmaschinen Gmbh & Co. Kg Dispositif et procédé de fabrication d'un sachet doté d'une enveloppe, contenant un matériau pouvant être infusé
EP3960427A1 (fr) 2020-08-31 2022-03-02 Teepack Spezialmaschinen GmbH & Co. KG Dispositif de fabrication d'un sachet reçu dans une enveloppe
EP4079647A1 (fr) * 2021-04-23 2022-10-26 Teepack Spezialmaschinen GmbH & Co. KG Dispositif et procédé de transport des pièces de tuyau flexible finies coupées et remplies et moyens de retenue

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EP3527501A3 (fr) 2019-12-11
EP3527501A2 (fr) 2019-08-21

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