FR2570352A1 - WATERPROOF CONTAINER FOR THE PACKAGING OF POWDER PRODUCTS - Google Patents

Abstract

1. Impervious container (1) for packaging powdered products or very fine granules, comprising an external envelope made from two sheets of web (2) fixed together both laterally and transversely by seams (3, 4, 5, 6) and an internal envelope (8) cemented to the two sheets of web and welded at the base, the said external envelope having at least one longitudinal slit (lateral opening 7) near the top through which a mouth (tubular element 10) of the internal envelope can be withdrawn, the base of the said external envelope being stitched through one of the transverse seams (3, 4) and being gathered to form a twist at the bottom (15) which is tied by a cord (16) while its mouth is gathered and tied by one or more cords or by a band of web (17) in order to be suspended from a hook (23), characterized in that the longitudinal slit is made by interrupting one (5) of the lateral seams (5, 6) to provide a lateral opening (7), the mouth of the internal envelope (8) is made in the form of a tubular element (10) by producing a longitudinal slit (11) starting at the top and welding the longitudinal part (13) corresponding to the length of the two sides of the edges of the slit as well as the upper transverse part (12) running from the said slit to the farther end of the lateral opening, the said tubular element (10) being drawn through the lateral opening to form an internal neck for filling (18), which is sealed after filling by means of a knot (22) before being pushed inside the container (1) again.

Description

The present invention relates to a watertight container

  che, flexible, large capacity for packaging

  of powdery products or of very small particle size.

  Nowadays, powdery products or products of very small particle size are contained, for semi-bulk packaging, in flexible containers made up of two envelopes. These are containers capable of packaging quantities of corresponding products

  in quantities of 250 kg to 1500 kg.

  The outer envelope which constitutes the resistant part of the packaging is a polypropylene fabric

  while the inner envelope is a poly- sheath

  ethylene which ensures sealing. The sheath body

  interior called sache is usually glued to the

  outer velvet and its bottom is welded. Its upper part

  or mouth is tied after filling so

  avoid any ingress of water in contact with the product.

  A disadvantage of the large capacity waterproof containers according to the prior art of the type described above is that very often a rupture of the bag due to the way it is put in place. The object of the present invention is to remedy the problem mentioned above by providing greater security in terms of sealing and by facilitating

  use for filling the container and closing it

after filling.

  According to the present invention, a content is provided.

  waterproof for packaging powdered products

  slow or very small particle size including an envelope

  external lodge made of two canvas panels

  stitched together both laterally and transversely-

  ment, one of the side seams being interrupted near the upper part or mouth to provide a side opening, the bottom sewn by one of the seams

  transverse being brought together to form a lower bun

  laughing which is ligated by a link while the mouth is gathered and ligated by one or more links or by a canvas band as well as an internal bag glued on the two canvas panels and whose bottom is welded, which is characterized by what the bag has at its upper part a tubular part made by performing

  a longitudinal slit and by welding both the long

  tudinal corresponding to the length of one of the edges of the slot as the upper transverse part existing from said slot and the. further from the side opening, said tubular part being pulled through

  the lateral opening to form a discharge chute

  pleating, which is closed after filling with a knot before entering it inside the container.

  The present invention also relates to the characteristics

  below, considered in isolation or in all their technically possible combinations: - the bottom of the bag includes, below the

  welding, a bib which is caught in the stitching of assembly

  blocking of the bottom of the container; - the longitudinal slot extends over approximately 50 cm; - the weld of the upper transverse part constituting the mouth of the bag extends over approximately cm; - the outer casing is made of polypropylene; - the inner bag is a polyethylene sheath;

  - the lateral opening has a corresponding dimension

  the length of the tubular part; - the lateral opening represents approximately 50 cm - the tubular part consists of the non-welded part of the mouth of the inner bag;

  - a filling nozzle is threaded into the groove

  tubular monkfish from the inner sac to introduce the

powdery products.

  Various additional benefits and features

  silences of the present invention will emerge from the description

  tion detailed below made with reference to the appended drawings in which: - FIG. 1 represents the container of the invention being formed; Fig. 2 shows the container during filling; - Fig. 3 shows the filled container in its final state;

  In the accompanying drawings o the same reference symbols

  Reference designate similar parts, the container according to the present invention is designated as a whole by 1. The container 1 comprises an external envelope made up of two canvas panels 2. The canvas panels 2 are advantageously made of polypropylene. They are assembled at the bottom, by a transverse seam 3 and at the mouth by another transverse seam 4. In addition, the canvas panels 2 are also assembled by two side seams 5 and 6. One of the side seams, the seam 5 in the example shown in FIG. 1 is interrupted near the upper part or mouth to provide a lateral opening 7. Both the side seams 5, 6 and the transverse seams 3, 4 can

  be made with a polypropylene thread. Before the realization

  final position of the outer envelope, we insert into it

  ci an inner sheath or bag 8 of the same width and having no bellows. Bag 8 is usually made of polyethylene. This bag 8 is glued to the two canvas panels 2 by beads of hot-melt glue 9, so as to obtain a good deployment at the time of the pre-inflation and a correct positioning with respect to the external envelope. This avoids any risk of rupture of the bag 8 at the time of filling and we therefore obtain

  perfect security with regard to sealing.

  In a known manner, the bottom of the bag 8 has been welded.

  The bag 8 has at its upper part a tubular part

  10 which is obtained by making a longitudinal slit

  nale 11. A transverse weld 12 as well as a weld

  longitudinal 13 ensure the formation of the tubular part

  area 10 of the bag 8. The bottom of the bag 8, below the weld has a flap 14 which is caught in the seam 3 of the bottom of the container 1. The bottom of the container 1 which has been sewn as is indicated above is gathered in a lower bun 15 which is ligated by an appropriate link 16. The transverse weld 12 extends over approximately 150 cm of the width of the mouth of the bag 8 while the longitudinal weld 13 extends about cm. It is easily understood that the transverse seam 4 of the mouth of the container 1 is carried out over the entire

  width without taking bag 8 in said seam 4.

  This mouth of container 1 is assembled and tied up

  by one or more links or by a strip of dried canvas

  matted at 17. The tubular part 10 of the bag 8 is pulled through the lateral opening 7 to form a filling chute into which, during

  filling the product 19 with a filling nozzle 20.

  The filling is carried out in the direction of arrow 21 in FIG. 2. The chute 18 is closed after filling the product 19 by means of a knot 22 before

  to be tucked inside container 1.

  The filling of container 1 is carried out

  dant said container 1 by its mouth ligated to the hook 23 of the station. As already indicated, the chute 18 constituted by the tubular part 10 of the bag 8

  is threaded around the filling nozzle 20.

  After filling and the time necessary for deaeration of the product 19, the chute 18 is knotted by a simple cow knot made manually and is

  tucked inside the container i. The tightness of the con-

  content 1 in the mouth is thus total.

  Thanks to the function of bag 8, the structure of which has been described in great detail in the present

  invention, the presentation of the container 1 at the filling station

  pleating and closing of the bag 8 require a much shorter time than with the current containers which have, at the mouth, a large volume of sheath or bag

To manipulate.

  The invention is not limited to the embodiment

  tion shown and described and it includes technical equivalents.

Claims (10)

  1. Sealed container (1) for packaging powdered products or very small particle sizes! comprising an outer envelope consisting of two canvas panels (2) joined by seams (3,4, 5,6)   both laterally and transversely, one (5) of the   side tures (5,6) being interrupted near the upper part or mouth to provide an opening   side (7), the bottom sewn by one of the transverse seams   dirty (3,4) being brought together to form a lower bun   laughing (15) which is ligated by a link (16) while the mouth is assembled and ligated by one or more links or by a canvas band (17) as well as an internal bag (8) glued on the two panels of fabric (2) and the bottom of which is welded, characterized in that the bag (8) has at its upper part a tubular part (10) produced by making a longitudinal slot (11) and by welding both the longitudinal part corresponding to the length of one of the edges of the slot (11) that the upper transverse part existing from said slot and the one farthest from the lateral opening (7), said tubular part (10) being pulled through   the lateral opening (7) to form a discharge chute   pleating (18), which is closed after filling with a knot (22) before returning it inside of the container (1).   2. Container according to claim 1, characterized in that the bottom of the bag (8) comprises, below   of the weld, a flap (14) which is caught in the layer   ture of assembly (3) of the bottom of the container (1).   3. Container according to one of claims 1 or   2, characterized in that the longitudinal slot (11) extends over approximately 50 cm.   4. Container according to any one of the claims   cations 1 to 3, characterized in that the weld (12) of the upper transverse part constituting the mouth   of the bag (8) extends over approximately 150 cm.   5. Container according to any one of the claims.   1 to 4, characterized in that the outer casing is polypropylene.   6. Container according to any one of the claims.   1 to 5, characterized in that the internal bag (8) is a polyethylene sheath.   7. Container according to any one of the claims   cations 1 to 6, characterized in that the lateral opening (7) has a dimension corresponding to the length of the tubular part (10)   8. Container according to any one of the claims   cations 1 to 7, characterized in that the lateral opening (7) represents approximately 50 cm.   9. Container according to any one of the claims   cations 1 to 8, characterized in that the tubular part (10) consists of the non-welded part of the mouth of the inner bag (8).   10. Container according to any one of the claims.   cations 1 to 9, characterized in that a filling nozzle (20) is threaded into the tubular chute (18) of the inner bag (8) to introduce the pulverulent products (19).