EP0768972A1 - Method and apparatus for moving a valve-sack from a filling position to a closing position, and a filling nozzle for use in connection with the filling - Google Patents

Method and apparatus for moving a valve-sack from a filling position to a closing position, and a filling nozzle for use in connection with the filling

Info

Publication number
EP0768972A1
EP0768972A1 EP95924199A EP95924199A EP0768972A1 EP 0768972 A1 EP0768972 A1 EP 0768972A1 EP 95924199 A EP95924199 A EP 95924199A EP 95924199 A EP95924199 A EP 95924199A EP 0768972 A1 EP0768972 A1 EP 0768972A1
Authority
EP
European Patent Office
Prior art keywords
valve
sack
filling
filling nozzle
nozzle
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
EP95924199A
Other languages
German (de)
French (fr)
Other versions
EP0768972B1 (en
Inventor
Christian Hejlesen
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.)
Korsnas Bates AS
Original Assignee
Bates Emballage AS
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 Bates Emballage AS filed Critical Bates Emballage AS
Publication of EP0768972A1 publication Critical patent/EP0768972A1/en
Application granted granted Critical
Publication of EP0768972B1 publication Critical patent/EP0768972B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/18—Methods of, or means for, filling the material into the containers or receptacles for filling valve-bags
    • 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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/46—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers
    • B65B43/465—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers for bags

Definitions

  • the invention relates to a method for moving a valve-sack from a filling position, where the sack's valve can be permanently sealed or closed, whereby the sack can be withdrawn from the filling nozzle and supported during its movement.
  • the invention also relates to an apparatus for the execution of the method, comprising a movable support element arranged for a filled valve-sack which can move the valve-sack from a filling position, where the sack's valve is applied to a filling nozzle, to a closing position where the sack's valve can be permanently sealed or closed, and a filling nozzle for use in connection with the apparatus.
  • Such a method and apparatus are known from GB publication 21 68 671.
  • the movable support element is built together with the filling nozzle.
  • the valve is held on the filling nozzle while at the same time the sack is tipped over into an inclined position, where the mouth of the valve points upwards at an angle. Thereafter, a further tipping of the sack takes place while the filling nozzle is held stationary until the valve is released from the nozzle.
  • the object of the invention is to provide a method and an apparatus whereby a positive control of the position of the valve can be effected between the filling position and the welding position, so that a greater reliability of the weldings is achieved.
  • the apparatus according to the invention is special in that the apparatus comprises two finger-shaped gripping elements which are mounted on control-arms, said control-arms being able to be moved in such a manner that the gripping ele ⁇ ments can be placed opposite each other on each side of the filling nozzle opposite the valve opening, introduced into the opening, grip the wall of the valve and move away from each other.
  • the gripping elements are introduced into the valve from the open side while the sack sits on the filling nozzle.
  • the side walls of the valve are thus under control when the valve is withdrawn from the filling nozzle, possibly during the transfer of the sack itself.
  • the gripping elements are drawn away from each other and the originally cylindrical valve opening is hereby made flat. In this condition, it is pos ⁇ sible to effect a very precise positioning of the closing elements, e.g. in the form of ultrasonic welding equipment or a glueing apparatus, in relation to the valve.
  • the filling nozzle according to the invention is provided with two pairs of ribs which lie opposite one another and which extend in the longitudinal direction of the nozzle.
  • the finger-shaped gripping elements can be inserted in the space which is formed by the ribs between the nozzle and the wall of the valve, and the insertion is therefore ef ⁇ fected with greater certainty.
  • figs. 1-3 show a filling station for a valve-sack seen from the side in three different operational steps
  • figs. 4a-b schematically show the positioning of the gripping elements in relation to the filling nozzle, and a valve-sack mounted in the start position, seen from the front and from above respectively,
  • figs. 5a-b show the same, but where the gripping elements are in engagement with the wall of the valve
  • figs. 6a-b show the same as in fig. 5, but where the valve is withdrawn from the filling nozzle
  • figs. 7a-b show the same as in fig. 6, but where the gripping elements are drawn away from each other and the valve is drawn flat, and
  • fig. 8 shows a section through an apron containing a control arm and a clamping jaw in the apparatus.
  • the filling station is configured as shown in the drawing.
  • a filling apparatus 1 with filling nozzle 2 is applied to valve-sack 3 by means of a commonly- known sack handling apparatus 4.
  • the apparatus 5 consists of a base-frame 6 which stands on the floor 7 and contains a not-shown drive and control unit.
  • a parallel-arm control arrangement is formed for a console 11 which is tipped around a horizontal axis by means of the arm 10 which comprises a compressed-air cylinder.
  • Both of the arms 8b and 9 are kinematically connected with gears inside the box 12, whereby they can move symmetrically around a vertical plane through the box 12.
  • a commonly-known ultrasonic welding apparatus 18 is secured to the frame 6 in a manner not shown.
  • the console 11 has a grid-shaped bottom 13 which can swing in under a valve-sack 3.
  • the console 11 also has two paral ⁇ lel aprons 14 which contain gripping elements or clamping jaws 15.
  • the clamping jaws are operated by compressed air and are mounted on the end of control arms 16, the con ⁇ figuration and suspension of which is shown in fig. 8.
  • Each of the clamping jaws 15 has a fixed, hook-shaped finger 21 and a compressed-air piston 30 which can clamp the wall 22 of the valve-sack against the finger 21.
  • three compressed-air cylinders 25, 26 and 27 are used in the manouevring of the arm 16, partly by swinging of a pivotable link 28.
  • the filling nozzle 2 is provided with two pairs of longitudinal ribs 19, which with regard to the use of nozzles of different sizes are secured to an annular sleeve 20. Between the ribs 19 there is room for the introduction of the clamping jaw fingers 21 between the wall 22 of the valve and the filling nozzle 2.
  • the console 11 is fed in towards the filled sack 3, which by the sack valve 23 hangs with its weight on the nozzle 2 until the aprons 14 are standing on each side of the sack 3 along the valve 17, see figs. 1 and 4a-b.
  • the bottom 13 is swung into the horizontal position, whereby the sack 3 is supported by the console 11.
  • the arms 16 with the clamping jaws 15 are fed towards each other and moved in behind the opening of the sack valve. Thereafter, the arms 16 are drawn back so that the fingers 21 of the clamping jaws engage with the wall 22 of the valve, see figs. 5a-b. The clamping jaws 15 are now activated so that the wall 22 of the valve is held.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Abstract

An apparatus for the movement of a filled valve-sack from a filling position on a filling nozzle (2) to a closing position comprises two finger-shaped gripping elements (15) which can grip around that edge of the valve (23) which faces the nozzle (2) and on each side of the nozzle. The position of the valve can hereby be defined in a positive manner during the withdrawal of the sack from the nozzle and forward to that position in which the valve (23) is to be closed, e.g. by ultrasonic welding.

Description

METHOD AND APPARATUS FOR MOVING A VALVE-SACK FROM A FILLING POSITION TO A CLOSING POSITION, AND A FILLING NOZZLE FOR USE IN CONNECTION WITH THE FILLING.
BACKGROUND OF THE INVENTION
The invention relates to a method for moving a valve-sack from a filling position, where the sack's valve can be permanently sealed or closed, whereby the sack can be withdrawn from the filling nozzle and supported during its movement. The invention also relates to an apparatus for the execution of the method, comprising a movable support element arranged for a filled valve-sack which can move the valve-sack from a filling position, where the sack's valve is applied to a filling nozzle, to a closing position where the sack's valve can be permanently sealed or closed, and a filling nozzle for use in connection with the apparatus.
Such a method and apparatus are known from GB publication 21 68 671. With the known apparatus, the movable support element is built together with the filling nozzle. With the known method, the valve is held on the filling nozzle while at the same time the sack is tipped over into an inclined position, where the mouth of the valve points upwards at an angle. Thereafter, a further tipping of the sack takes place while the filling nozzle is held stationary until the valve is released from the nozzle.
With this known technique, the valve and the valve opening are not fixed in a positive manner during and after with¬ drawal from the filling nozzle. Uncertainty thus arises concerning the position of the valve when it is subsequent¬ ly welded. Consequently, problems can arise with correct closing, and a certain percentage of the sacks are not closed correctly. A similar and known technique is described in DE Cl 3,400,154, where after filling at a filling station the sack is withdrawn from the filling nozzle and thereafter moved sideways to a welding station where the welding is effected. Also here the valve can move during the transfer between the two stations, and the subsequent closing is un¬ reliable.
EXPLANATION OF THE INVENTION
The object of the invention is to provide a method and an apparatus whereby a positive control of the position of the valve can be effected between the filling position and the welding position, so that a greater reliability of the weldings is achieved.
This is achieved with a method whereby finger-shaped grip- ping elements in the filling position grip the walls of the valve in two substantially opposite places on each side of the filling nozzle, said gripping elements holding the wall of the valve until the sack is in the closing position, and moving away from each other when the valve is free of the filling nozzle.
The apparatus according to the invention is special in that the apparatus comprises two finger-shaped gripping elements which are mounted on control-arms, said control-arms being able to be moved in such a manner that the gripping ele¬ ments can be placed opposite each other on each side of the filling nozzle opposite the valve opening, introduced into the opening, grip the wall of the valve and move away from each other.
The gripping elements are introduced into the valve from the open side while the sack sits on the filling nozzle. The side walls of the valve are thus under control when the valve is withdrawn from the filling nozzle, possibly during the transfer of the sack itself. When the valve is free of the filling nozzle, the gripping elements are drawn away from each other and the originally cylindrical valve opening is hereby made flat. In this condition, it is pos¬ sible to effect a very precise positioning of the closing elements, e.g. in the form of ultrasonic welding equipment or a glueing apparatus, in relation to the valve.
The filling nozzle according to the invention is provided with two pairs of ribs which lie opposite one another and which extend in the longitudinal direction of the nozzle. The finger-shaped gripping elements can be inserted in the space which is formed by the ribs between the nozzle and the wall of the valve, and the insertion is therefore ef¬ fected with greater certainty.
THE DRAWING
Example embodiments of the invention will now be described in more detail with reference to the drawing, where
figs. 1-3 show a filling station for a valve-sack seen from the side in three different operational steps,
figs. 4a-b schematically show the positioning of the gripping elements in relation to the filling nozzle, and a valve-sack mounted in the start position, seen from the front and from above respectively,
figs. 5a-b show the same, but where the gripping elements are in engagement with the wall of the valve, figs. 6a-b show the same as in fig. 5, but where the valve is withdrawn from the filling nozzle,
figs. 7a-b show the same as in fig. 6, but where the gripping elements are drawn away from each other and the valve is drawn flat, and
fig. 8 shows a section through an apron containing a control arm and a clamping jaw in the apparatus.
DESCRIPTION OF THE EMBODIMENTS
It is preferred that the filling station is configured as shown in the drawing. A filling apparatus 1 with filling nozzle 2 is applied to valve-sack 3 by means of a commonly- known sack handling apparatus 4.
During the filling, the sack hangs on the nozzle 2, but is hereafter removed by an apparatus 5 according to the invention. The apparatus 5 consists of a base-frame 6 which stands on the floor 7 and contains a not-shown drive and control unit. With the arms 8a-b, 9 and 10, a parallel-arm control arrangement is formed for a console 11 which is tipped around a horizontal axis by means of the arm 10 which comprises a compressed-air cylinder. Both of the arms 8b and 9 are kinematically connected with gears inside the box 12, whereby they can move symmetrically around a vertical plane through the box 12.
A commonly-known ultrasonic welding apparatus 18 is secured to the frame 6 in a manner not shown.
The console 11 has a grid-shaped bottom 13 which can swing in under a valve-sack 3. The console 11 also has two paral¬ lel aprons 14 which contain gripping elements or clamping jaws 15. The clamping jaws are operated by compressed air and are mounted on the end of control arms 16, the con¬ figuration and suspension of which is shown in fig. 8. Each of the clamping jaws 15 has a fixed, hook-shaped finger 21 and a compressed-air piston 30 which can clamp the wall 22 of the valve-sack against the finger 21. In the example shown, three compressed-air cylinders 25, 26 and 27 are used in the manouevring of the arm 16, partly by swinging of a pivotable link 28.
The filling nozzle 2 is provided with two pairs of longitudinal ribs 19, which with regard to the use of nozzles of different sizes are secured to an annular sleeve 20. Between the ribs 19 there is room for the introduction of the clamping jaw fingers 21 between the wall 22 of the valve and the filling nozzle 2.
With the method according to the invention, the console 11 is fed in towards the filled sack 3, which by the sack valve 23 hangs with its weight on the nozzle 2 until the aprons 14 are standing on each side of the sack 3 along the valve 17, see figs. 1 and 4a-b. The bottom 13 is swung into the horizontal position, whereby the sack 3 is supported by the console 11.
Hereafter, the arms 16 with the clamping jaws 15 are fed towards each other and moved in behind the opening of the sack valve. Thereafter, the arms 16 are drawn back so that the fingers 21 of the clamping jaws engage with the wall 22 of the valve, see figs. 5a-b. The clamping jaws 15 are now activated so that the wall 22 of the valve is held.
In this position, the whole of the console 11 is fed back, whereby the sack and its valve are withdrawn from the nozzle 2, see figs. 6a-b. The arms 16 are now drawn away from each other, whereby the valve opening, which was ori- ginally cylindrical, is drawn flat and almost closed. The console 11 is now tipped, see the right-hand half of fig. 2, whereby the valve opening is placed in a position at the welding apparatus 18. Hereafter, the welding of the valve 23 is carried out at a distance from the opening and behind that place where the wall 22 of the valve is held by the clamping jaws 15.
When the valve 23 has been closed by welding, the console 11 is tipped back again to the start position and the clamping jaws 15 are drawn out of the valve opening. By swinging of the bottom 13, the sack 3 is now released for removal on a conveyor belt 24.
In this way, that part of the valve which is to be closed is under positive control during the whole of the process forward to the place where the welding is to be effected.

Claims

C L A I M S
1. Method for the moving of a valve-sack from a filling po¬ sition, where the valve of the sack is applied to a filling nozzle, to a closing position where the sack's valve can be sealed or permanently closed, and whereby the sack is withdrawn from the filling nozzle and supported during its movement, c h a r a c t e r i z e d in that finger-shaped gripping elements in the filling position grip the wall of the valve in two substantially opposite places on each side of the filling nozzle until the sack is in the closing po¬ sition, and are moved away from each other when the valve is free of the filling nozzle.
2. Apparatus for the execution of the method according to claim 1, and comprising a movable support element arranged for a filled valve-sack which can move the valve-sack from a filling position, where the valve of the sack is applied to a filling nozzle, to a closing position where the valve can be sealed or permanentIky closed, c h a r a c t e r i z e d in that the apparatus comprises two finger-shaped gripping elements which are mounted on control arms, said control arms being able to move so that the gripping ele¬ ments can be positioned opposite each other on each side of the filling nozzle opposite the opening of the valve, in¬ troduced into the opening, grip the wall of the valve and move away from each other.
3. Apparatus according to claim 2, c h a r a c t e r i z e d in that the control arms for the gripping elements are mounted on retaining arms which are provided with elements for the activation of the feeding arms.
4. Filling nozzle for use in the filling of a valve-sack and in connection with the apparatus according to claim 2, c h a r a c t e r i z e d in that on the filling nozzle there are provided two pairs of ribs, said ribs lying op¬ posite each other and extending in the longitudinal direction of the nozzle.
5. Filling nozzle according to claim 4, c h a r a c t e r i z e d in that the height of the ribs increases in the direction away from the discharge opening of the nozzle.
6. Filling nozzle according to claim 4 or 5, c h a r a c t e r i z e d in that the ribs are provided on a sleeve which is mounted on the filling nozzle.
EP95924199A 1994-07-05 1995-07-05 Method and apparatus for moving a valve-sack from a filling position to a closing position, and a filling nozzle for use in connection with the filling Expired - Lifetime EP0768972B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK80294 1994-07-05
DK199400802A DK172472B1 (en) 1994-07-05 1994-07-05 Method and apparatus for moving a valve bag from a filling position to a closing position and filling spout therefor
DK802/94 1994-07-05
PCT/DK1995/000288 WO1996001208A1 (en) 1994-07-05 1995-07-05 Method and apparatus for moving a valve-sack from a filling position to a closing position, and a filling nozzle for use in connection with the filling

Publications (2)

Publication Number Publication Date
EP0768972A1 true EP0768972A1 (en) 1997-04-23
EP0768972B1 EP0768972B1 (en) 2002-01-02

Family

ID=8097736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95924199A Expired - Lifetime EP0768972B1 (en) 1994-07-05 1995-07-05 Method and apparatus for moving a valve-sack from a filling position to a closing position, and a filling nozzle for use in connection with the filling

Country Status (7)

Country Link
EP (1) EP0768972B1 (en)
AT (1) ATE211452T1 (en)
AU (1) AU2880695A (en)
DE (1) DE69524875T2 (en)
DK (2) DK172472B1 (en)
NO (1) NO311338B1 (en)
WO (1) WO1996001208A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005059004A1 (en) 2005-12-08 2007-06-14 Haver & Boecker Ohg Method and device for filling bags
EP1857369B1 (en) * 2006-05-11 2012-01-25 Haver & Boecker oHG Filling machine for filling open, sealable bags with lateral folds
DE102011012879A1 (en) * 2011-03-02 2012-09-06 Haver & Boecker Ohg Apparatus and method for filling valve bags with pourable goods

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613022A (en) * 1947-03-20 1952-10-07 St Regis Paper Co Apparatus for sealing valved bags
GB1478507A (en) * 1974-01-04 1977-07-06 Windmoeller & Hoelscher Machine for sliding valved sacks onto the filling nipple of a filling machine
DE2821273C2 (en) * 1978-05-16 1985-07-25 Windmöller & Hölscher, 4540 Lengerich Device for attaching large sacks to the filling funnel of a sack filling device
FI831572L (en) * 1982-05-10 1983-11-11 Ernst Richard Berthelsen VENTILSAECK OCH ANORDNING FOER DESS PAOSAETTNING PAO FYLLNINGSHORN PAO EN FYLLNINGSAPPARAT SAMT FOERFARANDE VID FRAMSTAELLNING AV VENTILSAECKAR
US4442874A (en) * 1982-06-17 1984-04-17 John L. Macfarlane Automatic valve bag placer
DE3446497A1 (en) * 1984-12-20 1986-06-26 Haver & Boecker, 4740 Oelde DEVICE FOR FILLING AND SEALING VALVE BAGS
DK452385A (en) * 1985-10-04 1987-04-05 Dac Emballage Amba METHOD AND APPARATUS FOR FITTING PLASTIC VALVE BAGS WITH THE FILL VALVE PLACED ON ONE SIDE OF THE BAG ON A FILLING MACHINE
DE3640581C2 (en) * 1986-11-27 1995-04-20 Greif Werk Masch Device for receiving, opening and attaching an open bag to the filler neck of a filling device
NL8800005A (en) * 1987-01-08 1988-08-01 Haver & Boecker Apparatus for attaching valve bags to the filling nozzle (s) of a packaging machine.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9601208A1 *

Also Published As

Publication number Publication date
DE69524875D1 (en) 2002-02-07
DK0768972T3 (en) 2002-03-18
NO311338B1 (en) 2001-11-19
DK172472B1 (en) 1998-09-07
DK80294A (en) 1996-01-06
NO965628L (en) 1996-12-30
AU2880695A (en) 1996-01-25
EP0768972B1 (en) 2002-01-02
NO965628D0 (en) 1996-12-30
ATE211452T1 (en) 2002-01-15
DE69524875T2 (en) 2002-08-22
WO1996001208A1 (en) 1996-01-18

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