FR2828181A1 - Bag for transporting materials by pneumatic conveyor has cardboard disk attached to its base which is larger in diameter than base of bag and fits tightly against walls of conveyor - Google Patents

Abstract

The bag (1) for transporting materials by pneumatic conveyor (7) has a cardboard disk attached to its base. This is larger in diameter than the base of the bag and fits tightly against the walls of the conveyor.

Description

<Desc / Clms Page number 1>

 The present invention relates to a container for pneumatic conveying.

 Pneumatic conveying systems are currently used currently for the transfer of various objects contained in a container or even in a cartridge propelled in tubular conduits by means of a pneumatic flow.

 The cartridges currently used are generally made of rigid material, for example plastic.

 The funds or other objects to be transported are inserted into the interior volume of the cartridge.

 Furthermore, the cartridge comprises sealing elements such as O-rings positioned at the outer periphery of the cartridge.

 This type of cartridge has the advantage of being solid and reusable but has the disadvantage of being costly to manufacture and of requiring the organization of a circuit for reusing the cartridges.

 In certain applications, recycling the cartridges is not advantageous in terms of cost or for other requirements, for example questions of sterilization of the cartridges.

 Document FR-A-2.727 is also known. 391 a bag of flexible material for pneumatic conveyor. This bag comprises one or more cylindrical tubes of the same diameter interconnected in a leaktight manner, the ends of which are connected either to the open air or to a source of pressure or vacuum.

 The tubular body of the bag comprises at least one flexible collar, one edge of which is tightly connected along a contour of the middle part of said body and means for holding the collar.

 According to this document, a complex device is produced by association of a tubular body and a flange to be fixed on the body and forming a parachute.

 This structure is not free from drawbacks in terms of manufacturing cost, in particular in the need for the peripheral circular fixing of the flange on the tubular body.

 Furthermore, if it is desired to convey in both directions, there is a need to produce two flanges, which consequently increases the manufacturing cost.

 Another drawback of this type of bag is the small diameter of the tubular body compared to the conveying tube which receives it.

<Desc / Clms Page number 2>

 It is indeed necessary to leave a sufficient amplitude to allow the collar to adopt a concave profile.

 There is therefore a limitation of the interior volume conveyed.

 In addition, the body must be rigid enough to receive fixedly and integrally the collar and so that it can effectively deploy.

 The present invention overcomes the drawbacks of the systems known hitherto for the manufacture of containers for pneumatic conveying.

 One of his first goals is to make a low cost container that can be disposable.

 To do this, the structure and manufacturing steps of the container are optimized.

 In addition, the same means are used to organize the movement of the cartridge in both directions in the tube.

Another advantage of the invention is the lightness of the container formed which can possibly be entirely foldable and therefore easily storable in the non-use position.

1 In general, the present invention has overcome a constant prejudice in the current technique that it is necessary to have sealing elements applying strongly between the body and the walls of the pipes.

 The invention demonstrates that it is possible to reduce the means used to achieve sealing and combines in a single piece, namely a bottom, the functions of stiffening the entire container and the surface for exercising the pneumatic flow. engine.

 Other objects and advantages will become apparent from the following description which presents a preferred embodiment of the invention.

 The present invention relates to a container for pneumatic conveying, characterized in that it comprises: - a bag of flexible material forming the volume for receiving the object to be contained; - A base of rigid material applied integrally at least on the peripheral part of one end of the bag.

- l'extrémité du sac opposée au fond comporte une ouverture obturable. This container can be presented according to the variants introduced below:

- The end of the bag opposite the bottom has a closable opening.

- the bottom covers the entire surface of the corresponding end of the bag.

- the bottom surface exceeds that of the corresponding end of the bag.

<Desc / Clms Page number 3>

 - the bottom is made of corrugated cardboard.

 - the bag is made of paper or flexible plastic.

 The attached drawings are given by way of examples and are not limitative of the invention. They represent only one embodiment of the invention and will make it easy to understand it.

 Figure 1 is a sectional view of the container according to the invention integrated in a pneumatic conveying pipe.

 Figure 2 is an exploded perspective view of a container according to a preferred embodiment.

 FIG. 3 is a side view of the container according to the embodiment of FIG. 2.

 The container 1 presented here is particularly usable in the field of transporting funds between a financial establishment and a conveyance vehicle since it eliminates the need to recycle the containers between the different conveyances.

 Another preferred application of the invention relates to pneumatic installations located in hospitals.

 In this area, questions of hygiene and sterilization are asked and the possibly disposable nature of the invention provides an answer to these problems.

 With reference to FIG. 1, it can be seen that the container 1 can be used in all types of pipe 7.

 In the figured case, the direction of transfer is shown diagrammatically by an arrow, but it is understood that the opposite direction can be achieved while ensuring proper operation of the assembly.

 The container 1 firstly consists of a bag 2, for example made of flexible plastic or else of paper.

 It will generally consist of a hollow tubular volume, one end of which, called by convention for the present description, front end 4, can be closed by closing means.

 According to the example of FIG. 2, the closure means 6 are produced by a link affixed at the end of the bag 2.

 The other end of the bag 2, here called rear end 5 by simple convention, is preferably flat and perpendicular to the long direction of the bag 2.

<Desc / Clms Page number 4>

 It is by this rear end 5 that the bag 2 cooperates with a bottom 3 which is attached to it.

 As shown, a bottom 3 is in fact applied to the end 5 and secured by any common means, in particular by gluing.

 In the illustrated case, the bottom 3 covers the entire surface of the rear end 5.

 However, other configurations are possible, and in particular the bottom 3 can be produced from an annular part which conforms only to the periphery of the surface of the rear end 5.

 The bottom 3 can for example be made of rigid plastic or also of corrugated cardboard.

 Preferably, the bottom 3 and the section of the bag 2 are circular, the diameter of the bottom 3 being slightly greater than that of the section of the bag 2.

 In this way, the bottom 3 is applied as close as possible to the walls of the pipes 7 and the bag 2 is sufficiently distant from said walls.

 It has been noted that, surprisingly, it does not matter that the bottom 3 is oriented in one direction or the other to achieve the proper functioning of the conveyance, regardless of the direction of transfer to operate.

<Desc / Clms Page number 5>

 REFERENCES 1. Container 2. Bag 3. Bottom 4. Front end 5. Rear end 6. Closing means 7. Pipe

Claims (6)

1. Container (1) for pneumatic conveying, characterized in that it comprises: - a bag (2) of flexible material forming the volume for receiving the object to be contained; - A bottom (2) of rigid material applied integrally at least on the peripheral part of one end (5) of the bag (2).  2. Container according to claim 1, characterized in that the end (4) of the bag (2) opposite the bottom has a closable opening.  3. Container according to claim 1 or 2, characterized in that the bottom (3) covers the entire surface of the end (5) corresponding to the bag (2).  4. Container according to any one of claims 1 to 3 characterized in that the surface of the bottom (3) exceeds that of the end (5) corresponding to the bag (2).  5. Container according to any one of claims 1 to 4, characterized in that the bottom (3) is made of corrugated cardboard.  6. Container according to any one of claims 1 to 5, characterized in that the bag (2) is made of paper or flexible plastic.