EP0193477B1 - Papiersack, dessen Boden mit einem Füllventil versehen ist - Google Patents

Papiersack, dessen Boden mit einem Füllventil versehen ist Download PDF

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Publication number
EP0193477B1
EP0193477B1 EP19860420041 EP86420041A EP0193477B1 EP 0193477 B1 EP0193477 B1 EP 0193477B1 EP 19860420041 EP19860420041 EP 19860420041 EP 86420041 A EP86420041 A EP 86420041A EP 0193477 B1 EP0193477 B1 EP 0193477B1
Authority
EP
European Patent Office
Prior art keywords
flaps
bag
bag according
filling
situated
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
EP19860420041
Other languages
English (en)
French (fr)
Other versions
EP0193477A1 (de
Inventor
Philippe Mougel
Michel Roche
Jean-Pierre Tavan
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.)
Mondi Lembacel SAS
Original Assignee
Lembacel SA
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 Lembacel SA filed Critical Lembacel SA
Publication of EP0193477A1 publication Critical patent/EP0193477A1/de
Application granted granted Critical
Publication of EP0193477B1 publication Critical patent/EP0193477B1/de
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

Definitions

  • the present invention relates to a paper bag, a bottom of which is equipped with a filling valve.
  • the design of the bottom allows, after removal of the cannula, the automatic closing of the orifice under the effect of the pressure of the product contained in the bag.
  • This structure is obtained by adding to the interior of the bottom of a specific shaped element having a transverse slot, and called "valve •.
  • valve element Whatever the sophistication of the valve element, it is never possible to obtain a perfect seal of the filling orifice.
  • the folding of the bottom, on the valve side ensures, by its structure, the formation of folds delimiting unwanted conduits allowing the leakage of material intended to fill the bag, in particular in the folding opposite to the filling orifice , during the projection of the material during bagging.
  • This technique requires the separate production of the constituent elements of the valve and the valve respectively, their positioning and their fixing independently of one another in the bottom of the bag, which constitutes long and expensive operations, and which increases the thickness of the bottom of the bag.
  • the present invention aims to remedy these drawbacks.
  • this bottom is equipped with a valve element, made from a sheet of paper or a cardboard plate of length greater than the distance between the two flaps of the first pair of flaps located on the side of the interior of the bag and of width greater than twice the distance between the two fold lines of the two flaps of the second pair of flaps, this element being folded back on itself and closed by gluing to form a flat tube whose one of the ends is closed, this tube being fixed by gluing on the outside face of the two interior flaps, and on the inside face of the two outside flaps, the wall of the tube situated on the side of the interior flaps comprising, in its zone situated between them ci, a transverse slot.
  • a valve element made from a sheet of paper or a cardboard plate of length greater than the distance between the two flaps of the first pair of flaps located on the side of the interior of the bag and of width greater than twice the distance between the two fold lines of the two flaps of the second pair of flaps, this element being folded back on itself and closed by gluing to
  • the face of the tubular element comprising the longitudinal closing edge thereof is located on the side of the outer flaps of the bag.
  • This structure facilitates the production of the valve and in particular the provision of the filling slot in the face of. the tubular element having no continuity solution.
  • the facing walls of the tubular element are also secured to one another by gluing along a transverse line located near the filling slot, on the side thereof opposite at the insertion side of the filling cannula in the tubular element.
  • This arrangement avoids, during filling, the passage and agglomeration of pulverulent products in the closed end of the tubular element.
  • the transverse bonding line has at least one interruption zone which allows, during filling, the evacuation of air contained in the bag, which has previously passed through the paper bottom thereof.
  • the open end of the tubular element comprises, over its entire periphery, a return towards the interior.
  • This return acts as a safety valve preventing the possible outflow of products which could not have been retained by the valve.
  • the fold delimited by the peripheral return serves as a housing for a sheet of flexible synthetic material, projecting inside the tubular element in the direction of the slot.
  • the plastic sheet folds, forming a barrier inside the tubular element.
  • the fold delimited by the peripheral return (23) serves as a housing for a strip of foam (25) which is very sparse, of high compressibility and instantaneous extensibility, projecting inside the tubular element, towards the slit.
  • FIG. 1 represents a paper bag (2) produced from a tubular element, one end (3) of which is closed, is equipped with a handle (4) and the other end of which is closed off by a square bottom (5 ).
  • This square bottom is obtained, in a known manner, by providing four identical flaps two by two, namely two interior flaps (6) and two exterior flaps (7).
  • the two inner flaps (6) are spaced from one another and provide an access (8) inside the bag, while the two outer flaps (7) come, in the closed position, overlapping the one from the other, as shown in the drawing.
  • FIGS. 3 and 4 the bottom is equipped with an element (9) of paper or cardboard, the side facing the inside of the packaging is shown in the drawing. It should be noted that in FIGS. 3 and 4, the areas comprising dotted lines are glued.
  • the element (9) has a length greater than the distance between the facing edges of the two flaps (6), and a width greater than twice the distance between the two fold lines (10) of the two outer flaps (7) .
  • the element (9) comprises two folds (12, 13) corresponding to the folds (10) of the flaps (7), and, in the central part (14), that is to say in the area between the folds (13) a transverse slot (15).
  • the glued areas ensure the fixing of the element (9) on the four flaps (6, 7) of the bottom of the bag.
  • Figure 4 shows the opposite face of the element (9), that is to say that located on the outside.
  • the element (9) folds back to form a tubular element, and the glued side part (16) covers the edge of the other side part (17).
  • glues (18) and (19) formed transversely on the central part of the element (9) ensure the closure of one end of the tubular element and a transverse closure of the latter in its central part, on the side of the slot (15) opposite the open end of the tubular element.
  • the area (19) may include certain interruptions (20) of glue ensuring the formation of chimneys allowing the escape of air during filling of the bag.
  • the element (9) is positioned so that its open end corresponds to an edge of the bottom, which facilitates the introduction of a filling cannula (22).
  • FIG. 5 represents this bottom, seen in longitudinal section after introduction of a filling cannula (22).
  • the introduction of the cannula allows filling through the slot (15) without the risk of the product escaping to the outside, or accumulating on the side of the closed end of the element. tubular.
  • FIG. 6 represents a variant of the element (9) in which the tubular element comprises, on the side of its open end, a return (23) inwards, extending over its entire periphery.
  • a sheet of flexible synthetic material (24) such as polyethylene which extends in the tubular element in the direction of the slot (15).
  • the rim (23) acts as a non-return valve for the pulverulent material which could have accidentally passed through the slit (15) after closing it, and the sheet of synthetic material (24), which crumbles during the withdrawal of the cannula plays the role of a baffle further enhancing the effectiveness of the closure.
  • the fold delimited by the rim (23) serves as a housing for a strip (25) of very sparse foam, of high compressibility and instantaneous extensibility, closing off all the conduits may result from folds of the sheets of paper or cardboard constituting the valve, and / or the presence of residual bagged product in the valve.
  • the invention brings a great improvement to the existing technique by providing a bottom of a paper bag equipped with a single element having both the valve and “targette” functions preventing product flows. outwards, and constituting an internal reinforcement of the bottom sufficient to avoid the presence of an external reinforcement strip, added, of poor aesthetics.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)

Claims (7)

1. Papiersack mit einem ein Füllventil aufweisenden Boden, der auf der Basis eines Schlauchelements hergestellt ist und bei dem wenigstens einer der Böden aus vier jeweils paarweise identischen Umschlagklappen besteht, die paarweise gegen das Zentrum des Bodens gefaltet sind, dadurch gekennzeichnet, daß der Boden mit einem ein Ventil bildenden Element ausgestattet ist, das aus einem Papierblatt (9) oder einer Kartontafel hergestellt ist, dessen bzw. deren Länge größer ist als der Abstand zwischen den beiden Umschlagklappen (6) des ersten auf der Innenseite des Sacks gelegenen Paares von Umschlagklappen und dessen Breite größer ist als der doppelte Abstand zwischen den beiden Faltlinien (10) der beiden Umschlagklappen (7) des zweiten Paares, daß dieses Element auf sich selbst gefaltet und durch eine Klebung verschlossen ist, derart daß es ein an einem seiner Enden geschlossenes, flaches Rohr bildet, und daß dieses Rohr durch Kleben auf der Außenseite der beiden inneren Umschlagklappen (6) und auf der Innenseite der beiden äußeren Umschlagklappen (7) befestigt ist, wobei die auf der Seite der inneren Umschlagklappen gelegene Wandung des Rohrs in der zwischen diesen inneren Umschlagklappen liegenden Zone einen transversalen Schlitz (15) aufweist.
2. Sack nach Anspruch 1, dadurch gekennzeichnet, daß die Seite des rohrförmiges Elements, die den in Längsrichtung verlaufenden Verschlußrand aufweist, sich auf der Seite der äußeren Umschlagklappen des Sacks befindet.
3. Sack nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die einander gegenüberliegenden Wandungen (14, 17) des rohrförmi- gen Elements gleichfalls durch Kleben längs einer transversalen Linie (19) miteinander verbunden sind, die sich in der Nähe und auf derjenigen Seite des Füllschlitzes befindet, die der Seite entgegengesetzt ist, an der die Füllkanüle in das rohrförmige Element einführbar ist.
4. Sack nach Anspruch 3, dadurch gekennzeichnet, daß die transversale Klebelinie (19) wenigstens eine Unterbrechungszone (20) aufweist, die bei dem Füllen das Entweichen der in dem Sack enthaltenen Luft ermöglicht, die zuvor durch den Papierboden des Sacks getreten ist.
5. Sack nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das offene Ende des rohrförmigen Elements längs seine gesamte Peripherie einen nach innen weisenden Umschlag (23) besitzt.
6. Sack nach Anspruch 5, dadurch gekennzeichnet, daß der durch den peripheren Umschlag (23) gebildete Falz zur Aufnahme einer Folie (24) aus weichem Kunststoff dient, die in Richtung des Schlitzes ins Innere des rohrförmigen Elements ragt.
7. Sack nach Anspruch 5, dadurch gekennzeichnet, daß der durch den peripheren Umschlag (23) gebildete Falz zur Aufnahme eines Schaumstoffstreifens (15) dient, der sehr geringe Dichte, große Kompressibilität und spontanes Ausdehnungsvermögen besitzt, die in Richtung des Schlitzes ins Innere des rohrförmigen Elements ragt.
EP19860420041 1985-02-18 1986-02-12 Papiersack, dessen Boden mit einem Füllventil versehen ist Expired EP0193477B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8502696A FR2577523B1 (fr) 1985-02-18 1985-02-18 Sac en papier dont un fond est equipe d'une valve de remplissage
FR8502696 1985-02-18

Publications (2)

Publication Number Publication Date
EP0193477A1 EP0193477A1 (de) 1986-09-03
EP0193477B1 true EP0193477B1 (de) 1988-04-13

Family

ID=9316585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860420041 Expired EP0193477B1 (de) 1985-02-18 1986-02-12 Papiersack, dessen Boden mit einem Füllventil versehen ist

Country Status (4)

Country Link
EP (1) EP0193477B1 (de)
DE (1) DE3660122D1 (de)
ES (1) ES292221Y (de)
FR (1) FR2577523B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109318536B (zh) * 2018-11-18 2023-08-25 江苏宇驰包装股份有限公司 一种半自动纸袋糊底机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894682A (en) * 1972-07-07 1975-07-15 Gilman Paper Company Container with filling opening and closure means therefor
US4095736A (en) * 1976-10-22 1978-06-20 International Paper Company Bag closure having valve sleeve
DE2652208A1 (de) * 1976-11-16 1978-05-18 Sachser Papierverarb Ventilsack
DE3203187A1 (de) * 1982-01-30 1983-08-11 Nordenia-Kunststoffe Peter Mager Kg, 2841 Steinfeld Fuell-ventil fuer einen ventil-sack

Also Published As

Publication number Publication date
DE3660122D1 (en) 1988-05-19
ES292221U (es) 1986-06-01
FR2577523B1 (fr) 1987-10-30
ES292221Y (es) 1987-03-01
FR2577523A1 (fr) 1986-08-22
EP0193477A1 (de) 1986-09-03

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