EP0086371B1 - Appareil pour emballer et fermer un sac fermé hermétiquement - Google Patents

Appareil pour emballer et fermer un sac fermé hermétiquement Download PDF

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Publication number
EP0086371B1
EP0086371B1 EP19830100710 EP83100710A EP0086371B1 EP 0086371 B1 EP0086371 B1 EP 0086371B1 EP 19830100710 EP19830100710 EP 19830100710 EP 83100710 A EP83100710 A EP 83100710A EP 0086371 B1 EP0086371 B1 EP 0086371B1
Authority
EP
European Patent Office
Prior art keywords
sack
sealing member
supply pipe
switch
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.)
Expired
Application number
EP19830100710
Other languages
German (de)
English (en)
Other versions
EP0086371A2 (fr
EP0086371A3 (en
Inventor
Shigeo Nakajima
Katsuhiko Kojima
Osamu Endoh
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.)
Nakajima Seisakusho Co Ltd
Original Assignee
Nakajima Seisakusho Co 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
Priority claimed from JP57013959A external-priority patent/JPS58149259A/ja
Priority claimed from JP10097782A external-priority patent/JPS58216504A/ja
Application filed by Nakajima Seisakusho Co Ltd filed Critical Nakajima Seisakusho Co Ltd
Publication of EP0086371A2 publication Critical patent/EP0086371A2/fr
Publication of EP0086371A3 publication Critical patent/EP0086371A3/en
Application granted granted Critical
Publication of EP0086371B1 publication Critical patent/EP0086371B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/145—Valve bags, i.e. with valves for filling the filling port being provided in a flat upper sealing-edge
    • 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

Definitions

  • the invention relates to an apparatus for filling powder materials into a sack, comprising a material supply pipe adapted for insertion into an aperture of a sealing member of the sack and provided with means for sealing the sack and a sack supporting member pivotably mounted at the lower part of the apparatus as disclosed in AT-B 224 540.
  • the supply pipe comprising a nozzle detachably mounted to and projecting from the front end of the head of the pipe; said nozzle includes fine holes for supplying an adhesive or adhesive-activating to the sealing member to provide active adhesive on the sealing member for sealing the sack, detecting means for detecting the inclination of the sack and activating a first switch initiating the issue of adhesive or fluid from the nozzle when the sack being supported by the supporting member is inclined to a predetermined angle at which angle the sealing member is out of contact with the supply pipe and activating a second switch initiating pivotting of the supporting member into a horizontal supporting position when the sack is vertical and the supply pipe is inserted in the aperture of the sealing member.
  • Sealing sacks by injecting a fluid into the sealing member of the sack is per se already disclosed in GB-A-2 046 696.
  • said detecting means comprise at least one angled lever pivotably mounted at the frame of the apparatus, one arm of which is inclined relative to the frame depending on the inclination of a sack, whereby the other arm operates the switches.
  • the first switch is adjustably mounted by an adjuster.
  • the second switch is placed opposite to the first switch and activated by the other arm of the level to start the filling of the sack.
  • FIGS 1 and 2 show respectively different types of sacks into which powder materials are supplied; the first sack 2 shown in Figure 1 is closed at both the upper and lower ends 11, 12 by means of sewing and is comprised of treble kraft forming a gore in both sides of the sack, while the second sack 2' shown in Figure 2 is closed at both the upper and lower ends 11', 12' by means of pasting, and is comprised of treble kraft forming a gore in both the ends.
  • a sealing member 1, 1' is provided at an appropriate position of the sack 2, 2' respectively.
  • the sealing member 1, 1' comprises an aperture through which a supply pipe 3 (shown in Figures 4 and 5) is inserted into the sack.
  • the inner walls of the dealing member opposite each other include a dried layer which is previously formed by spreading and dying an adhesive agent thereon.
  • the adhesive agent applied to the layer is such a kind as is immediately activated to give adhesion to the layer when an activator (for example water or a certain kind of solvent adaptable to the adhesive agent) is supplied.
  • an activator for example water or a certain kind of solvent adaptable to the adhesive agent
  • an adaptable adhesive agent is chosen and is spread on the inner walls of the sealing member, and then dried.
  • the layer can be formed in another way: by previously spreading and drying a chosen adhesive agent on a surface of a strip 5, for example of kraft; holding the strip so that the layer is faced together; and pasting the held strip to the inner walls adjacent to the aperture so that the layer is faced together. In this case, the held ends of the strip 5 are sewn together with the end 11 of the sack.
  • the sack is made of kraft
  • the sack is made of canvas
  • polystyrene is infiltrated to a part of the sack adjacent to the aperture to form the sealing member.
  • a sack can be easily sealed off after powder materials are supplied therein, and when the sack is made of kraft, by jetting an adapted activator (for example water or a certain kind of solvent adapted to the layer formed on the inner walls of the sealing member) to the inner walls of the sealing member, or, when the sack is made of canvas, by jetting an adapted activator (for example toluene or xylene).
  • an adapted activator for example water or a certain kind of solvent adapted to the layer formed on the inner walls of the sealing member
  • an adapted activator for example toluene or xylene
  • the sack does not require that an adhesive agent be directly jetted from slits or fine holes provided on the cylindrical surface of the supply pipe, but does require that an adapted activator such as water or a certain kind of solvent is jetted therefrom.
  • an adapted activator such as water or a certain kind of solvent
  • FIGS. 4 and 5 which show respectively a construction and an external view of the supply pipe 3, the pipe is fixed to a frame 10 of a packing apparatus by means of a flange 6.
  • the pipe 3 comprises a curved head adapted for insertion into an aperture of the sealing member, and the lower part of the head comprises a port 13 adapted to discharge powder materials.
  • the rear end of the pipe 3 is connected to a conveying pipe (not shown), which is further connected to a hopper (not shown), and through which powder materials are conveyed.
  • powder materials stocked in the hopper can be brought to the supply pipe 3 by, and together with, compressed air.
  • An expansible tube 4 is mounted on the body part of the pipe 3, both ends of the tube 4 respectively are firmly fastened to the body part.
  • An air pipe A is provided to the pipe 3 so as to supply compressed air between the tube 4 and the outer surface of the body of the pipe, thus the tube 4 is expanded by the compressed air supplied through the air pipeA, then, when the supply pipe 3 is inserted in the sack, the tube 4 can be firmly contacted with the adjacent part of the aperture and stretches it.
  • the tube 4 can support the sack itself in collaboration with the supporter 30 (shown in Figures 6 to 10) provided at the lower part of the packing apparatus, and the tube 4 also serves as a shutting member that closes the space between the supply pipe 3 and the aperture of the sealing member, to prevent the supplied powder materials from discharging out of the sack through the space.
  • a discharge pipe B is provided within the supply pipe 3 so as to extend to the port 13 at the one end thereof, and the other end of the pipe B is connected, via a filter (not shown), to a circuit (not shown) which is open to the air, whereby the compressed air supplied into the sack can be discharged through the discharge pipe B when powder materials are supplied into the sack.
  • An activator pipe W is also provided within the pipe 3 extending longitudinally to project from the front end of the head, and a jet nozzle 21 is detachably mounted to the front end of the pipe W by a screw.
  • the other end of the pipe W is connected, via a solenoid valve (not shown), to an airtight tank in which an activator (for example water or ethanol) is stocked under compression.
  • the activator can be supplied, under compression, to the nozzle 21 by controlling the solenoid valve with a micro-switch 25 and a timer, the operations of which will be described hereafter in detail.
  • the nozzle 21 comprises fine holes (for example of four to six) provided on the cylindrical surface thereof, through which the activator is radially jetted in spray when the activator is supplied through the pipe W.
  • the spread and the dried adhesive agent of the layer formed on the inner surface of the sealing member is activated by receiving the jetted spray of the activator.
  • the packing apparatus comprises, as mentioned above, a frame 10 to which the supply pipe 3 is fixed by means of the flange 6, and the apparatus further comprises a pair of bent levers 22 which are pivotably mounted to the respective side of the apparatus by an axle 20. Both the levers 22 are interconnected, at the top ends of the longer arm thereof, by a rod 23 which extends laterally relative to the apparatus. A shorter arm of either one of the levers 22 is designed so as to contact alternatively with micro-switches 24, 25 at the lower or the upper position of the shorter arm.
  • the levers 22 are pivotably mounted on the frame 10 so that a clockwise moment acts on the axle 20 due to the weight of the levers 22 and of the centroid thereof, as far as external force is not given thereto.
  • the apparatus further comprises a supporting member 30, which is pivotably mounted by an axle 26 to the frame 10.
  • the axle 26 is connected, via a linkage (not shown), to an operation rod of an air cylinder (not shown).
  • the supporting member 30 is pivotably mounted at the lower part of the apparatus so as to be kept horizontal, when the operation rod is pushed forward, and so as to be kept inclined forward, when it is drawn back.
  • the powder materials stocked in the hopper are supplied, through the supply pipe 3, by and together with the compressed air, into the sack.
  • the compressed air supplied in the sack is discharged through the discharge pipe B, and the powder materials contained in the discharged air are filtrated by the filter.
  • the powder materials supplied in the sack is automatically measured by a measuring mechanism (not shown) connected to the frame 10, and, when the supplied powder materials amount to a predetermined weight, the supply of the powder materials is stopped, and then the expanded sack is deflated by discharging the air supplied in the sack. Then, the operation rod of the air cylinder is drawn back by exchanging the supply circuit of the compressed air, whereby the supporting member 30 is inclined forward.
  • the sack containing a predetermined amount of powder materials drops down one to its own weight ( Figures 9 and 10).
  • the bent levers 22 are pivoted following the movement of the sack. Since the microswitch 25 is designed so as to be contacted to be closed by the shorter arm of the lever 22 when the nozzle 21 comes just within the inner walls of the sealing member while the sack is inclined to fall, the switch 25 is closed when the sack is inclined to a predetermined angle, which can be seen from Figure 9.
  • both the solenoid valve, provided in a predetermined position of a circuit connected to the activator pipe W, and the timer connected to the solenoid valve are operated to supply an activator to the activator pipe Wfor a predetermined period (for example for 0.1 to 0.3 seconds).
  • the activator is jetted in spray, from the nozzle 21 to the inner walls of the sealing member, while the nozzle 21 is within the inner walls of the sealing member.
  • the inner walls of the sealing member, on which an adapted adhesive agent has been previously spread and dried, is dampened by the activator, thus providing adhesion.
  • the starting point of jetting the activator from the nozzle 21 is set at the time when the nozzle comes inside the sealing member.
  • the starting point is chosen by controlling an adjuster 28 so that the shorter arm of the lever 22 is contacted with the micro-switch 25 just when the shorter arm has been stopped by the adjuster 28.
  • the end point of jetting the activator is set at the time when the nozzle 2T is released from the inside of the sealing member. That is, jetting the activator is continued until the nozzle 21 is released from the sack.
  • the period during which the jetting of the activator is continued is determined by setting the timer according to previous tests.
  • the sack containing the powder materials as shown in Figure 10, is inclined according to the inclination of the supporting member 30, and falls due to its own weight, for example onto a belt conveyor.
  • the sealing member provided for the sack is designed such that the opposite walls of the sealing member are pressed together by outward force of the powder materials supplied in the sack, the sack can be sealed while falling.
  • the supply pipe 3 is used in combination with a sack.
  • the supply pipe is applicable to any conventional type of sack which requires an adhesive agent to be directly jetted from the holes of the nozzle 21.
  • an adhesive agent itself instead of an activator is designed so as to be jetted from the nozzle 21, under greater compression compared to the foregoing embodiments due to greater viscosity.
  • the sealing member is sealed by means of a heat-melting adhesive agent
  • the present invention is also applicable to such a heat-melting method.
  • the heat-melting adhesive is previously spread and dried on the innerwalls of the sealing member of the sack, and, on the other hand, an activator adapted to the adhesive agent is designed so as to be jetted from the nozzle 21.
  • a pair of heat plates is provided at an appropriate position of a conveyor belt on to which the fallen sack is received, whereby packing can be performed in the same manner as the foregoing embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Package Closures (AREA)

Claims (5)

1. Appareil pour remplir un sac (2) de matières pulvérulentes, comprenant un conduit d'alimentation en matière (3) agencé pour être introduit dans un orifice d'un élément de scellement (1) du sac (2) et muni de moyens de scellement du sac (2) et un élément supporte de sac (30) monté pivotant à la partie inférieure de l'appareil, caractérisé par les points suivants:
- le conduit d'alimentation (3) comprend un ajutage (21) monté détachable et en faisant saillie sur l'extrémité avant de la tête de conduit (3); ledit ajutage (21) comprend des petits trous pour amener un adhésif ou activant d'adhésif à l'élément de scellement (1) et le munir d'un adhésif actif pour sceller le sac (2),
- des moyens de détection (22, 24, 25) pour détecter l'inclinaison du sac et actionner un premier interrupteur (25) amorçant la sortie de l'adhésif, ou fluide, de l'ajutage quand le sac (2), supporté par l'élément support (30), est incliné d'un angle prédéterminé, sous lequel l'élément de scellement (1) est hors de contact avec le conduit d'alimentation (3), et pour actionner un second interrupteur (24) amorçant le pivotement de l'élément support (30) dans une position de support horizontale quand le sac (2) est vertical et le conduit d'alimentation est inséré dans l'orifice de l'élément de scellement (1).
2. Appareil selon la revendication 1, caractérisé par le fait que lesdits moyens de détection (22, 24,
25) comprennant au moins un levier coudé (22) monté pivotant sur le bâti de l'appareil, et dont un arbre est incliné par rapport au bâti en fonction de l'inclinaison d'un sac (2), l'autre bras actionnant alors les interrupteurs (24, 25).
3. Appareil selon la revendication 2, caractérisé par le fait que le premier interrupteur (25) est monté réglable par un moyen de réglage (27).
4. Appareil selon la revendication 2 ou 3, caractérisé par le fait que le second interrupteur (24) est placé opposé au premier interrupteur (25) et actionné par l'autre bras du levier (22) pour démarrer le remplissage du sac (2).
EP19830100710 1982-01-30 1983-01-26 Appareil pour emballer et fermer un sac fermé hermétiquement Expired EP0086371B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP57013959A JPS58149259A (ja) 1982-01-30 1982-01-30 弁付き包装袋
JP13959/82 1982-01-30
JP100977/82 1982-06-11
JP10097782A JPS58216504A (ja) 1982-06-11 1982-06-11 弁付き包装袋への粉粒体充填方法ならびにその装置

Publications (3)

Publication Number Publication Date
EP0086371A2 EP0086371A2 (fr) 1983-08-24
EP0086371A3 EP0086371A3 (en) 1986-02-19
EP0086371B1 true EP0086371B1 (fr) 1988-04-27

Family

ID=26349817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830100710 Expired EP0086371B1 (fr) 1982-01-30 1983-01-26 Appareil pour emballer et fermer un sac fermé hermétiquement

Country Status (2)

Country Link
EP (1) EP0086371B1 (fr)
DE (1) DE3376412D1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD57545A (fr) *
US3083780A (en) * 1957-09-10 1963-04-02 Continental Carbon Co Bag-filling and handling machine
AT224540B (de) * 1960-01-07 1962-11-26 Natronzellstoff Und Papierfab Ventilsack aus Papier od. dgl. und Verfahren zum Verschließen derartiger Säcke
US3102561A (en) * 1961-06-19 1963-09-03 Black Products Co Self venting spout
DE1910575A1 (de) * 1969-03-01 1970-09-10 Behn Verpackung Erwin Verschluss fuer die Innenseite von schlauchfoermigen Ventileinlagen von Kreuzbodenventilsaecken
GB1418131A (en) * 1972-02-19 1975-12-17 Nakashima S Automatic package bag feeding device for use with an automatic charging device
CH583650A5 (en) * 1975-07-29 1977-01-14 Pavag Ag Sack with hose type valve insert - has filler opening sealed by glue layer activated after filling
IT1073427B (it) * 1975-10-03 1985-04-17 American Colloid Co Perfezionamento nelle valvole per il riempimento di sacchi
DE2944369A1 (de) * 1979-02-21 1980-09-18 Polymer Films Vorrichtung zum fuellen und verschliessen von saecken

Also Published As

Publication number Publication date
DE3376412D1 (en) 1988-06-01
EP0086371A2 (fr) 1983-08-24
EP0086371A3 (en) 1986-02-19

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