EP1138602A2 - Machine de fermeture de sacs - Google Patents

Machine de fermeture de sacs Download PDF

Info

Publication number
EP1138602A2
EP1138602A2 EP01302329A EP01302329A EP1138602A2 EP 1138602 A2 EP1138602 A2 EP 1138602A2 EP 01302329 A EP01302329 A EP 01302329A EP 01302329 A EP01302329 A EP 01302329A EP 1138602 A2 EP1138602 A2 EP 1138602A2
Authority
EP
European Patent Office
Prior art keywords
bag
neck
tying
filled
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01302329A
Other languages
German (de)
English (en)
Other versions
EP1138602B1 (fr
EP1138602A3 (fr
Inventor
David Kellaway
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AEW Thurne Ltd
Original Assignee
AEW Thurne Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AEW Thurne Ltd filed Critical AEW Thurne Ltd
Publication of EP1138602A2 publication Critical patent/EP1138602A2/fr
Publication of EP1138602A3 publication Critical patent/EP1138602A3/fr
Application granted granted Critical
Publication of EP1138602B1 publication Critical patent/EP1138602B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/06—Applying adhesive tape
    • B65B51/065—Applying adhesive tape to the necks of bags

Definitions

  • Numerous bag sealing machines exist which apply a strip of adhesive tape around the gathered neck of a bag. Typically these machines require the movement of the bag past the machine on a conveyor. It is only the neck of the bag that passes through the bag tying mechanism, the neck of the bag extending beyond the conveyor perpendicularly to the direction of travel in order for the neck of the bag to pass through the bag tying machine. This means that the components of the tying mechanism can be close together with only small movements required to complete a tying operation.
  • An example of a bag tying machine of this type is described in GB-A-0128687. Given that only small movements are required to complete a tying operation this type of bag tying machine can operate at least as fast as existing bagging machines.
  • automatic bag tying machines are used as an integral part of a whole bagging and sealing production line and so must be compatible with particular bagging machines if they are to be useful.
  • the bags pass through the bagging machine end on, in other words the neck of the bag is either at the front or at the rear of the bag in the direction of travel.
  • Existing bag tying machines which apply a strip of adhesive tape around the neck of a bag are incompatible with these bagging machines.
  • Systems which transfer filled bags onto another conveyor so that they can be tied by existing machines end up being very bulky and not as fast as the bagging machines. Furthermore with such systems it can be problematic keeping all of the product within the bag when transferring between conveyors.
  • a bag tying machine comprises:
  • the bag is stationary when the length of adhesive tape is applied to the neck of the bag.
  • the present invention allows a neck of a bag to be sealed by a bag tying mechanism and either before or after tying tape around the neck of the bag, the bag can move through the centre of the bag tying mechanism without interfering with it. During the time the bag moves through the machine a new length of tape can be cut and mounted on the bag tying means ready for the next bag.
  • the bag tying machine further comprises gathering means for gathering together the neck of the filled bag prior to the action of the bag tying means.
  • the gathering means comprises a pair of elongate members which approach the neck of the filled bag from opposite directions in the plane substantially perpendicular to the first direction and substantially perpendicular to the path of the bag tying means and sandwich the neck of the bag so that it lies in a plane extending in the first direction.
  • the bag tying means and the reaction member gather together the neck of the bag as they move together in the first direction.
  • the bag tying means comprises:
  • the arcuate surfaces are pneumatically biassed against each other.
  • the tie applicator member and the reaction member are driven in a reciprocating fashion on a guide rail by a single drive mechanism.
  • the drive mechanism may be pneumatically driven but preferably it is a cam driven mechanism as this allows for faster movement of the tie applicator member and the reaction member.
  • the bag tying means includes a pair of cantilevered leaf springs attached to the first guide means and positioned in front of the arcuate surfaces in order to further gather the clamped neck of the bag prior to tying the adhesive tape around the neck of the bag.
  • FIG. 1 shows a schematic view of a bag tying machine at the beginning of a tying cycle. The subsequent steps of the tying cycle will now be described.
  • the open bag 1 moves on a conveyor until the open neck of the bag which is to be sealed is aligned with the gathering means 2 and the bag tying means 3. This position is shown in Figure 2.
  • the gathering means 2a,2b move towards the neck of the bag and loosely clamp the neck of the bag against each other to form a flattened neck portion between the gathering means.
  • the gathering means 2 are in the form of a pair of elongate U-shaped members. When clamped together the gathering means form a tunnel across which the clamped neck of the bag extends and through which the bag tying means 3a,3b are permitted to pass. This position is shown in Figure 3.
  • the bag tying means comprises a pair of guide members 3a,3b mounted on guide rails.
  • the guide members enter the gathering means from opposite ends and are driven by a single pneumatic mechanism.
  • Means for holding a length of adhesive tape are attached to one of the guide members 3a.
  • This guide member is a plate into which a slot has been cut and which is designed to received the clamped neck of the bag.
  • the other guide member 3b comprises a pair of parallel plates into each of which has been cut a slot for receiving the clamped neck of the bag.
  • the two guide members move towards each other through the gathering means, on guide rails.
  • the guide members are arranged such that the plates of member 3b pass either side of guide member 3a.
  • the guide members gather the clamped neck of the bag until it is compressed into a bundle at the centre of the gathering means and it passes through the adhesive tape holding means.
  • the holding means comprise a pair of rollers 5, connected to pneumatically controlled elements and biassed so as to contact one another at their circumference, as shown in Figure 7, onto which a non adhesive side of a length of adhesive tape 4 can be laid, and a pair of stops 6 for holding the adhesive tape 4 on the rollers 5.
  • the stops 6 may also be pneumatically actuated by pneumatic elements attached to the guide member 3a.
  • the rollers 5 are mounted so that they contact each other at a point overlying the slot, a short distance from the end of the slot.
  • the gathered neck of the bag contacts the adhesive tape 4 and the stops 6 holding the tape against the rollers 5 release the tape simultaneously.
  • the continued motion of the guide 3 members push the neck of the bag against the rollers 5 and through the space therebetween.
  • the action of the rollers 5 folds the adhesive tape4 around the neck of the bag and press the adhesive sides against each other.
  • the guide member 3b not holding the rollers and tape stops and is locked into position before the application of the tape to the neck of the bag to ensure that the neck is stationary at the time of applying the tape so that the tape is accurately applied.
  • the rollers 5 are then moved apart and the guide means 3 retracted away from the neck of the bag.
  • the gathering means 2 are also retracted and the bag moved away on the conveyor. The whole cycle can then be restarted with a new bag.
  • a new length of adhesive tape 4 must be mounted on the rollers 5 during each cycle.
  • the method of mounting the tape is shown in Figure 7.
  • the end of a roll of tape is pulled by a gripper 7 across a space into which the rollers 5, mounted on a guide member 3a, are then moved so that the non adhesive side of the tape 4 contacts the rollers 5.
  • the stops 6 are then moved into contact with the adhesive side of the tape 4 in order to hold the tape against the rollers 5.
  • the gripper 7 then releases the end of the tape and the tape is cut at a point between the rollers 5 and the rest of the roll of tape, leaving just a length of tape mounted on the rollers 5.
  • the rollers 5 together with the length of tape 4 move back from the grippers 7 and the roll of tape into a position aligned with the other guide member 3b prior to the tying operation.
  • Figure 8 shows a section of an example of a preferred embodiment of the present invention.
  • the guide member 3a is shown in a retracted position whilst the guide member 3b is shown in a tying position, however in reality they would both be in the tying position or the retracted position.
  • Both guide members 3a and 3b are driven by a single pneumatic mechanism 10. From the position shown pneumatic arm 10a is driven outwards to push guide member 3a, via arm 11a, to the tying position. Similarly arm 10b would be drawn in to pull guide member 3b to a retracted position.
  • Guide member 3b comprises four parallel fingers in a rectangular array, however only two can be seen in the view of Figure 8.
  • Gathering means 2 are shown their togethermost position, where they would be clamping together the neck of a bag.
  • Point T is marked as the point where the neck of a bag is sealed with the application of a length of adhesive tape.
  • the gathering means 2 are in the form of a pair of elongate U-shaped members which are mounted on guide rods 12 which are moveable to and from the tying point so as to allow a tied bag to pass through the machine.
  • Tape is supplied from a tape supply 14 and passes through tape printing machine 15 before being mounted on the rollers 5.
  • the tape printing machine prints information on the non-adhesive side of the tape, such as a sell by date, before the tape is applied to the filled bags.
  • the tape is cut into predetermined lengths by a cutter 13, which cannot be clearly seen in Figure 8.
  • Figure 9 shows the tying means mounted on guide member 3a.
  • Rollers 5 are mounted on pneumatically extendable arms 15 via T-shaped members 16 and mounting members 17.
  • Stops 6 are similarly mounted on pneumatically extendable arms 18.
  • Cantilevered leaf springs 9 are shown contacting each other in front of the rollers 5.
  • a length of tape is mounted on the rollers 5.
  • the arms 18 are extended so that the stops 6 hold the tape in place.
  • the guide member 3a is moved towards guide member 3b.
  • the clamped neck of the bag gathers up against the leaf springs 9.
  • the relative movement of guide 3a and the neck of the bag pushes the tape and the neck of the bag between the rollers 5 until the ends of the tape are pressed against each other.
  • the guide members 3a,3b then retract from the neck of the bag.
  • the stops 6 are pneumatically retracted on arms 18 and the rollers 5 separated by movement of mounting members 17.
  • the separation of the rollers is effected by the retraction of arms 15.
  • the T shaped member 16 rotates about pin 19 which in turn causes the outward movement of arms 17.
EP01302329A 2000-03-29 2001-03-14 Machine de fermeture de sacs Expired - Lifetime EP1138602B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0007675.2A GB0007675D0 (en) 2000-03-29 2000-03-29 Bag tying machine
GB0007675 2000-03-29

Publications (3)

Publication Number Publication Date
EP1138602A2 true EP1138602A2 (fr) 2001-10-04
EP1138602A3 EP1138602A3 (fr) 2002-03-27
EP1138602B1 EP1138602B1 (fr) 2003-09-24

Family

ID=9888709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01302329A Expired - Lifetime EP1138602B1 (fr) 2000-03-29 2001-03-14 Machine de fermeture de sacs

Country Status (4)

Country Link
EP (1) EP1138602B1 (fr)
AT (1) ATE250536T1 (fr)
DE (1) DE60100818T2 (fr)
GB (1) GB0007675D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1386840A1 (fr) * 2002-08-01 2004-02-04 Nepal S.r.l. Dispositif pour le cerclage d'un objet, en particulier pour des oeufs de Pâques, avec un lien adhésif

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB128687A (en) 1918-04-20 1919-07-03 Arthur Peregrine He Desborough Improvements in or relating to the Manufacture of Lactic Acid and its Salts and the Recovery of the Volatile Fatty Acid By-products.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8428986D0 (en) * 1984-11-16 1984-12-27 Thurne Eng Co Ltd Bag tying machine
GB9623926D0 (en) * 1996-11-18 1997-01-08 Thurne Eng Co Ltd Bag sealing machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB128687A (en) 1918-04-20 1919-07-03 Arthur Peregrine He Desborough Improvements in or relating to the Manufacture of Lactic Acid and its Salts and the Recovery of the Volatile Fatty Acid By-products.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1386840A1 (fr) * 2002-08-01 2004-02-04 Nepal S.r.l. Dispositif pour le cerclage d'un objet, en particulier pour des oeufs de Pâques, avec un lien adhésif

Also Published As

Publication number Publication date
GB0007675D0 (en) 2000-05-17
ATE250536T1 (de) 2003-10-15
DE60100818D1 (de) 2003-10-30
EP1138602B1 (fr) 2003-09-24
DE60100818T2 (de) 2004-07-15
EP1138602A3 (fr) 2002-03-27

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