Closing device

Abstract

A device (11) for closing an end-side closing section (2) of a packaging-forming, flexible or pouch bag formed of a film material includes a clamp (4) surrounding the pigtail end (3) of the end-side closing section for closing the same and a cap (6) surrounding free end (5) of the pigtail end (3) and secured on the clamp (4) with an adhesive (12) for forming a force-locking connection between the cap (6) and the clamp (4).

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a device for closing an end-side closing section of a packaging-forming flexible or pouch bag formed of a film material, with the closing device having a clamp surrounding a pigtail end for closing the end-side closing section and a cap surrounding a free end of the pigtail end. [0003] 2. Description of the Prior Art [0004] Chemical materials such as, e.g., sealing and adhesive materials are stored, nowadays, in flexible or pouch bags formed of a film material. For closing the end side closing section of a bag, the film material is gathered in a pigtail at the end of the closing section, and the pigtail end of the closing section is closed with a clamp that surrounds the pigtail end. One-or-two-component masses such as polyurethane systems, silicone masses, injectionable connecting mortar, can be examples of such material. Dependent on the filler material and the physical behavior of...

AI Technical Summary

Benefits of technology

[0009] This and other objects of the present invention, which will become apparent hereinafter, are achieved by securing the cap to the clamp with an adhesive. The adhesive can be provided in the interior of the cap so that it fills the space between the cap and the clamp when the cap is put on the clamp. Thereby, due to the adhesive bonding of the surfaces of the cap and the clamp, on one hand, and due to the stability of the adhesive (cohesion), on the other hand, the cap and the clamp become force- and formlockingly connected with each other. Alternatively, the adhesive can be provided on the clamp so that the adhesive in this case likewise, fills the space between the cap and the clamp when the cap is put on the clamp. Whenever a packaged material leaks from the pigtail end which is surrounded by the clamp, the material is received in the cap so that its leakage from the packaging bag is prevented.

[0010] Instead of simply placing the cap on the clamp, the cap, e.g., can be placed on the clamp over the pigtail end by rotating the cap. For a reliable fixing of the cap on the clamp, it is sufficient to apply the adhesive selectively in a number of point to the clamp or the cap. The adhesive connection proved to be satisfactory at both static load and dynamic load With the use of the adhesive the surfaces and the structure of the material of the cap or the clamp does not change. Furthermore, with the connection being effected along the corresponding surfaces and due to the elasticity of the adhesive, the oscillation damping characteristics of the adhesive connection is improved in comparison, e.g., with pressure connection of the clamp and the cap. By selecting a suitable adhesive, a cap which is made, e.g., of a plastic material can be connected with a clamp made, e.g., of metal. The connection arrangement according to the present invention insures a satisfactory connection of the cap with the clamp during transportation and storage up to the use of the material in the flexible or pouch bag. The closing device is easily mountable and is flexible in use.

[0014] Advantageously, the adhesive is circumferentially distributed over the cap and / or the clamp, so that in addition to a reliable connection between the cap and the clamp, a sealed connection therebetween is provided. The adhesive layer serves as a sealing layer for gases and fluids which can be formed or produced and, on the other hand, prevents penetration of the waste water and corrosion associated with the penetration of water.

Problems solved by technology

Dependent on the filler material and the physical behavior of the fluid components of the material that fills the bag, leakage can occur at the pigtail end of the bag.

Dependent on a mass that fills the bag, the mass leaving the bag can contaminate the environment.

The drawback of this solution consists in that the adhesion of tape to the surface of the film material cannot always be insured.

The drawback of this solution consists in that the film material of the flexible or pouch bag can be damaged during the cap being pressed in.

The drawback of this solution consists in that for forming a sufficiently reliable connection with the clamp, the cap should be precisely adapted to the shape of the pigtail end and the arrangement of the clamp thereon.

In addition, as in the U.S. Pat. No. 3,308,936, the film material of the packaging can be damaged when the cap is mounted on the pigtail end.

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