EP0498047B1 - Sachet à fond croisé ou plat avec valve - Google Patents

Sachet à fond croisé ou plat avec valve Download PDF

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Publication number
EP0498047B1
EP0498047B1 EP91119428A EP91119428A EP0498047B1 EP 0498047 B1 EP0498047 B1 EP 0498047B1 EP 91119428 A EP91119428 A EP 91119428A EP 91119428 A EP91119428 A EP 91119428A EP 0498047 B1 EP0498047 B1 EP 0498047B1
Authority
EP
European Patent Office
Prior art keywords
bag
valve
filter material
blank
corner
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 - Lifetime
Application number
EP91119428A
Other languages
German (de)
English (en)
Other versions
EP0498047A1 (fr
Inventor
Alois Gröner
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.)
Bischof and Klein SE and Co KG
Original Assignee
Bischof and Klein SE and Co KG
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 Bischof and Klein SE and Co KG filed Critical Bischof and Klein SE and Co KG
Publication of EP0498047A1 publication Critical patent/EP0498047A1/fr
Application granted granted Critical
Publication of EP0498047B1 publication Critical patent/EP0498047B1/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
    • 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
    • B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms

Definitions

  • the invention relates to a cross or block bottom valve sack made of paper, plastic film or the like.Foldable material for in particular dusty and powdery filling material, with a sack bottom incorporated into one of its two bottom side envelopes and corner inserts lying opposite each other in the area of a valve-forming corner insert, the one on the Filling neck of a valve bag filling device has push-fit valve hose, which at one end protrudes beyond the valve-forming corner wedge into the bag interior and is made of foldable material.
  • US-A-4 759 641 describes a known sack according to the preamble of claim 1.
  • the areas of the filter material blank folded inward along the side fold lines of the bottom side envelopes are only glued to themselves in the known sack, without a connection to the valve section which increases the strength of the valve area Go into the top of the valve hose, and the inner edge of the filter material cut protrudes beyond the inner edge of the associated corner insert into the sack interior, so that the inner end of the filter material cut in the filled state of the bag, in which the valve arrangement is pressed flat by the contents, does not protrude from the corner insert is covered, whereby the sealing of the filling material is reduced after the completion of the filling process.
  • the partition formed by the filter material blank is formed in the known sack as a bag for the close-fitting reception of a suction nozzle, which is connected to a suction pump and used to suck air out of the sack through the filter partition during the filling of the sack into the bag to be removed when the filling process is complete. This delays the venting process.
  • the invention has for its object to provide a cross or block bottom valve sack of the type specified, in which, without perforations and the like. Vents in the sack material and the use of a suction nozzle, a reliable, quickly effective venting of the sack is achieved, in particular during the filling process and at the same time dusting of filler particles is avoided.
  • valve hose When the filling process has ended and the filled sack has been thrown off the filling device, the valve hose is automatically closed in a manner known per se by flattening it under the pressure of the filled product, which at the same time presses the partition wall made of filter material with its ventilation window into its parallel position to the corner and valve hose . Characterized in that the partition made of filter material is then pressed flat between the valve hose and corner wedge, the partition is normally not accessible for access of moisture from the outside, so that penetration of moisture into the sack inside the filter material is not to be feared.
  • the retention of the filling particles inside the sack during the venting process is favored in this arrangement of the partition wall in that the impact of the air vortex in the upper sack corner stabilized by the inserted filling nozzle slows down the filling particles and falls down due to gravity in the inside of the sack, so that already cleaned air is supplied to the ventilation window.
  • a single-layer cross-bottom valve sack made of paper is shown, in its place a block-bottom valve sack made of two or more layers of material can also occur.
  • material layers consisting entirely of paper
  • material layers comprising paper can also be used, for example paper laminated with plastic and / or metal foils as a barrier layer, or barrier layer intermediate layers made of metal, plastic foils and similar materials.
  • plastic films alone are also considered as sack material.
  • the material sides or layers consisting of paper are preferably used, which permit the use of starch-based adhesives customary in paper bag production.
  • the bottom middle breaking line is designated by 1
  • the two opposing bottom side envelopes are designated by 2 and 3.
  • the valve-forming corner turn is shown, which bears the reference number 4.
  • a flat filter material blank 5 is first glued onto the corner wedge 4.
  • Suitable filter materials for the filter blank 5 are all suitable materials with the required gas or air permeability with a corresponding particle retention capacity, such as in particular filter or filter paper or nonwoven material.
  • the width of the filter material blank 5 is in the embodiment 1 to 3 double the base width plus an overlap region which closes the filter blank 5 in a tubular manner.
  • the bottom width is measured by the transverse dimension between the two side fold lines 6 and 7 of the bottom side envelopes 2 and 3, by which they are folded over in the course of the production of the cross bottom and glued together.
  • the side edge areas of the filter material blank 5 are also folded inward along the side fold lines 6, 7 of the bottom side envelopes 2, 3 and glued to the top of a valve tube 8, which consists of foldable material that is customary in bag valves and is in turn glued to the filter material blank 5.
  • the filter material blank 5 as seen in the longitudinal direction of the valve hose 8, is glued to the top of the corner wrap 4 in its inner end region on its underside by a cross adhesive application 9 and in its outer end region by an adhesive application 10 to the underside of the valve hose 8 in its upper end region.
  • the length arrangement is such that the inner edge 11 of the tubular filter material blank 5 is arranged at a distance from the inner edge 12 of the corner wedge 4, while the valve tube 8 both the inner edge 11 of the filter material blank 5 and the inner edge 12 of the corner wedge 4 towered over to the inside of the bag.
  • the tubular filter material blank 5 in its half lying above the valve tube 8 is glued on its upper side to the underside of the bottom side envelopes 6, 7, while in its outer end region on its underside it is glued to the upper side of the valve tube 8 by a further cross-adhesive application 14 is glued.
  • an adhesive-free area 15 which forms a ventilation window in the partition wall formed by the filter material blank 5 between corner wedge 4 and valve tube 8 during the filling process, in which, as shown in FIG 3 can be seen, the sack on its valve corner with the valve hose 8 the filler neck 16 of a pneumatic filler device, shown schematically at 17 with its filler neck holder, is pushed on, the sack hanging on the filler neck 16.
  • the weight of the sack which is increasingly filled with filling material, pulls it down below the filler neck 16, while at the same time and supported by the internal air overpressure, the lower layer of the filter material cut or hose 5 is pulled down in the area in which it is not is connected to the valve tube 8 by the adhesive application 10.
  • the adhesive-free area 15 is placed more or less vertically and thus forms a ventilation window for the compressed air fed into the bag interior with the compressed air / product flow according to the arrows 18, which during its swirling movement inside the bag due to an impact effect in the upper, through the filler neck 16 stabilized corner area of the sack experiences a component of movement to the outside through the ventilation window 15 with increased separation of remaining filler particles still contained in the air flow, as indicated by the flow arrows 19. Further residual constituents of filling material particles in the outflowing air are now completely retained by the filter material of the ventilation window 15, so that practically dust-free air exits, as indicated at 19a.
  • the residual air is also practically completely pushed out through the ventilation window 15, while at the same time the corner wrap 4 and the bottom side envelopes 2 and 3 are pressed flat by the valve tube due to the pressure of the contents in the sack 8 and the filter material blank 5 are pressed together, again the lower layer of which is flattened with the adhesive-free area 15, to essentially assume the parallel position shown in FIG. 1 to the corner wedge 4 and valve hose 8, in which the filter material is compared to the other sack material external environment is covered.
  • This blocking of the ventilation-active area 15 of the filter material from the outside can be further reinforced in the valve construction according to the present exemplary embodiment by that the outwardly projecting region 23 of the valve tube 8 is bent inwards by a transverse line and is inserted into the pocket 20 formed between the corner wedge 4 and the lower layer of the tubular filter material blank 5, overlapping the region 15.
  • the filter material blank 5 seen in the longitudinal direction of the valve hose 8, runs through it flat or in one layer in its normal parallel position to it, in the embodiment according to FIGS. 4 to 6 the filter material blank 5 'is along an im substantially central transverse fold line 21 folded over on itself, the adhesive-free area 15 forming the ventilation window being arranged on both sides of the transverse fold line 21 with the fold edge pointing outwards.
  • the filter material blank 5 ' is closed to form a hose, as was explained in connection with the first exemplary embodiment.
  • the same reference numerals are used in the further exemplary embodiments, without a repeated description.
  • the filter material blank 5 'thus has the shape of a ring sleeve, the lower half of which is arranged below and the upper half above the valve hose 8.
  • the adhesive application 9 in the lower half establishes the connection between the corner wedge 4 and the adjacent, lower layer of the filter material blank 5 ', while the adhesive application 10 establishes the connection between the valve hose 8 and the adjacent, upper layer of the filter material blank 5'.
  • the adhesive of the bottom side envelopes 2 and 3 to the adjacent, upper layer is produced by the transverse adhesive application 13 and the valve hose 8 is bonded to the adjacent, lower layer of the upper half of the sleeve-shaped filter material blank 5 'by the adhesive application 14.
  • the two cross adhesive applications 9 and 10 which are identified by hatching in FIG. 5, are congruent with one Contoured by the transverse fold line 21 arcuate retraction.
  • a ventilation window is formed with this contouring, which is shaped like an oval from the side edges of the two layers of the lower half of the cuff-shaped filter material blank 5 '' extended towards the center, in order to create a correspondingly larger outflow area for the emerging air.
  • the compressed air introduced into the interior of the sack with the compressed air / filling material flow is pressed, as in the case of the first exemplary embodiment, according to the flow arrows 19 below the valve hose 8 receiving the filling nozzle 16, into a flat channel in the manner of a wind sock, in order to end it through the ventilation window 15 Filter wall with separation of remaining filling material particles from the air flow.
  • valve hose 8 for sealing the filling material has a hose inner valve 22 which extends correspondingly far beyond the inner edge 12 of the corner wedge 4 into the bag interior
  • a valve hose 8 is provided which, in addition to a hose inner valve 22, which, however, is shortened compared to that of the second exemplary embodiment, has a hose outer valve 23.
  • the filter material blank 5 ′′ is again folded over on itself along a substantially central transverse fold line 21, the adhesive-free area 15 forming the ventilation window being arranged on both sides of the transverse fold line 21.
  • the transverse fold line 21 faces the outer side of the bag with the formation of an outwardly directed fold edge
  • the transverse fold line 21 is formed near the inner peripheral edge 12 of the corner fold 4 with the formation of a fold edge pointing towards the inside of the bag arranged.
  • the filter material blank 5 '' formed cuff is not closed to a ring, but the bottom width in its upper part only overhangs with narrow edge areas folded inwards along the side fold lines 6, 7, of which the top layer by means of edge-side adhesive applications 13 'with the bottom side cover 6 or 7 and the lower layer is glued to the top of the valve tube 8 by means of appropriate adhesive applications 14 '.
  • All of the exemplary embodiments have in common that the inner edge 12 of the corner wrap 4 projects beyond the inner edge 11 or fold line 21 of the filter material blank, so that the corner wedge 4 in the filled state of the sack, in which the valve arrangement is pressed flat by the filling material, the filter material blank on the inside End covered.
  • Valve configurations in which the width of the valve tube 8 is smaller than the width of the filter material cut between the side fold lines 6, 7 of the bottom side envelopes 2, 3 are preferred, since the ventilation window with a correspondingly large outflow surface can be formed particularly effectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Claims (8)

  1. Sac à valve à fond croisé ou à fond carré en papier, en pellicule de matière plastique ou en matière pliable analogue, en particulier pour un produit à ensacher en poudre ou pulvérulent, avec une valve de remplissage incorporée dans un de ses deux fonds comportant des rabats latéraux de fond (2, 3) et des replis d'angle (4) opposés par paires, dans la zone d'un repli d'angle (4) formant valve, ladite valve comportant un boyau-valve, pour sa part en matière pliable, pouvant être glissé sur la buse de remplissage (16) d'un dispositif de remplissage de sac à valve (17) et s'étendant, à une extrémité, par-dessus le repli d'angle formant valve (4), à l'intérieur du sac, sachant que, entre le dessous du boyau-valve (8) tourné vers le repli d'angle (4) et le dessus du repli d'angle (4) est incorporée une paroi de séparation en une matière perméable au gaz, mais retenant les particules de la matière à ensacher, et que la paroi de séparation est maintenue normalement dans un plan sensiblement parallèle au boyau-valve (8) et au repli d'angle (4), à courte distance de ceux-ci, et ne peut être déformée localement à partir de sa position parallèle vers une position fonctionnelle dressée formant une fenêtre de mise à l'atmosphère (15), automatiquement sous l'effet de la surpression d'air régnant dans le sac, que pendant l'introduction de la matière à ensacher via la buse de remplissage (16) du dispositif de remplissage (17), caractérisé en ce que la paroi de séparation est formée par un flan en matière filtrante (5; 5'; 5'') dont les zones dépassant la largeur du fond, rabattues vers l'intérieur le long des lignes de pliage latérales (6, 7) des rabats latéraux de fond (2, 3), sont reliées au côté supérieur du boyau-valve (8), et que le bord marginal intérieur (11; 21) du flan en matière filtrante (5; 5'; 5'') est disposé à une certaine distance en amont du bord marginal (12) du repli d'angle (4).
  2. Sac suivant la revendication 1, caractérisé en ce que la largeur du flan de matière filtrante (5; 5') est égale au double de la largeur du fond plus une zone de chevauchement fermant le flan (5; 5') à la façon d'un boyau.
  3. Sac suivant la revendication 1 ou 2, caractérisé en ce que le flan de matière filtrante (5; 5'; 5''), vu dans le sens longitudinal du boyau-valve (8), est relié chaque fois par un dépôt d'adhésif transversal (9, 10) dans ses deux zones d'extrémité, d'une part au repli d'angle (4) et d'autre part au boyau-valve (8) et une zone (15) laissée sans adhésif entre les deux dépôts d'adhésif transversaux (9, 10) forme la fenêtre de mise à l'atmosphère.
  4. Sac suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le flan de matière filtrante (5'; 5'') est replié sur lui-même suivant une ligne de pliage transversale (21) sensiblement médiane et la zone sans adhésif (15) formant la fenêtre de mise à l'atmosphère est disposée de part et d'autre de la ligne de pliage transversale (21).
  5. Sac suivant la revendication 3 ou 4, caractérisé en ce que les deux dépôts d'adhésif transversaux (9, 10) sont conformés suivant un retrait en arc de cercle dirigé vers l'avant à partir de la ligne de pliage transversale (21).
  6. Sac suivant la revendication 4 ou 5, caractérisé en ce que le flan de matière filtrante (5') est disposé avec son bord coupé intérieur à proximité du bord marginal intérieur (12) du repli d'angle (4) et sa ligne de pliage transversale (21) forme un bord plié dirigé vers l'extérieur du sac.
  7. Sac suivant la revendication 4 ou 5, caractérisé en ce que le flan de matière filtrante (5') est disposé avec sa ligne de pliage transversale (21) formant un bord plié dirigé vers l'intérieur du sac, à proximité du bord marginal intérieur (12) du repli d'angle (4) et son bord coupé est dirigé vers l'extérieur du sac.
  8. Sac suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que la largeur du boyau-valve (8) est inférieure à la largeur du flan de matière filtrante (5; 5'; 5'') entre les lignes de pliage latérales (6, 7) des rabats latéraux de fond (2, 3).
EP91119428A 1991-02-02 1991-11-14 Sachet à fond croisé ou plat avec valve Expired - Lifetime EP0498047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9101210U DE9101210U1 (fr) 1991-02-02 1991-02-02
DE9101210U 1991-02-02

Publications (2)

Publication Number Publication Date
EP0498047A1 EP0498047A1 (fr) 1992-08-12
EP0498047B1 true EP0498047B1 (fr) 1995-02-15

Family

ID=6863944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119428A Expired - Lifetime EP0498047B1 (fr) 1991-02-02 1991-11-14 Sachet à fond croisé ou plat avec valve

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EP (1) EP0498047B1 (fr)
DE (2) DE9101210U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100821A1 (fr) 2008-03-10 2009-09-16 Billerud AB Sac en papier deux épaisseurs

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5806982A (en) * 1994-05-10 1998-09-15 Stone Container Corporation Self-closing sealable valve bag
US6164823A (en) * 1998-12-07 2000-12-26 Southern Bag Corporation, Ltd. Valve bag and method for making a valve bag
US6074095A (en) * 1999-02-16 2000-06-13 Bemis Company, Inc. Four member valve closure assembly for valve bags
US6499879B2 (en) 2001-05-02 2002-12-31 Hood Packaging Corporation Sealable valve bag and method for making a sealable valve bag
US8142077B2 (en) 2008-04-16 2012-03-27 Graphic Packaging International, Inc. Bag structures and methods of assembling the same
DE202013102644U1 (de) * 2013-06-19 2013-07-24 Papiersackfabrik Tenax Gmbh & Co. Kg Ventilsack mit Entlüftungsvorrichtungen
CN112807790A (zh) * 2021-01-14 2021-05-18 成都若仅良电子商务有限公司 一种节能环保的服装加工中废水处理装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058928B (de) * 1957-12-06 1959-06-04 Duerbeck Papiersackfab Ventilverschluss fuer Ventilsaecke
EP0010563B1 (fr) * 1978-01-04 1982-01-20 Kraft-Pak Ab Sacs à valve
GB2018721B (en) * 1978-04-14 1982-08-25 Wavin Bv Plastics bag with a filling valve
US4759641A (en) * 1982-02-22 1988-07-26 Bemis Company, Inc. Valve bag
EP0367769A1 (fr) * 1987-05-11 1990-05-16 Wavin B.V. Sac a clapet ventile
DE8811184U1 (fr) * 1988-09-05 1988-11-10 Bischof Und Klein Gmbh & Co, 4540 Lengerich, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100821A1 (fr) 2008-03-10 2009-09-16 Billerud AB Sac en papier deux épaisseurs

Also Published As

Publication number Publication date
EP0498047A1 (fr) 1992-08-12
DE59104620D1 (de) 1995-03-23
DE9101210U1 (fr) 1991-04-25

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