Gas separation: apparatus – Solid sorbent apparatus – Soluble or deliquescent type
Patent
1996-09-24
1997-10-14
Smith, Duane S.
Gas separation: apparatus
Solid sorbent apparatus
Soluble or deliquescent type
55280, 55424, 96147, 206204, B01D 5314
Patent
active
056767390
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
This invention concerns a moisture-absorbing device in the form of a tube, which in its longitudinal direction is divided into an upper chamber containing a moisture-absorbing agent and a lower chamber containing a liquid-collecting means and communicating with the upper chamber via a liquid-permeable means.
WO 93/14996 discloses a moisture-absorbing device of this type, which is intended to absorb moisture in a container, whose walls have stiffening folds forming vertical grooves on the inside of the walls, and is for this purpose positioned in such a groove. The tube of this prior-art device is made of a fine-meshed steel-wire netting. The upper chamber contains a moisture-absorbing agent in the form of calcium-chloride flakes, and the lower cheer contains a liquid-collecting means in the form of liquid-absorbing particles of an agent marketed under the trade name of SKAMOL. The liquid-permeable means provided between the upper and the lower chamber here is a partition consisting of a steel-wire netting. Being larger than the meshes of the steel-wire netting forming the tube, the calcium-chloride flakes and the Skamol particles are retained in the tube, while air is allowed to enter. Since these flakes and particles are larger than also the meshes of the steel-wire netting forming the partition, they are retained in their respective chambers, while liquid is allowed to pass through the partition.
However, the prior-art device described above suffers from certain drawbacks. If the device is handled carelessly, for instance during transport, the steel-wire netting forming the tube may easily be damaged, thus allowing flakes and particles to escape from the tube. When the liquid-absorbing particles are saturated with liquid, liquid may escape from the device and damage the goods kept in the container.
One object of the present invention is to provide a moisture-absorbing device obviating these drawbacks and in addition being inexpensive and easy to produce.
According to the invention, this object is achieved by a device which is of the type stated by way of introduction and which is wherein the tube is made of board coated with plastic and has at least one opening on a level with the upper chamber, a netting element, which has at least one fine-meshed netting portion, is so attached to the inside of the tube that the netting portion is located in front of said opening, and the liquid-collecting means consists of a liquid-tight container connected to the liquid-permeable means.
Preferably, the tube is made of corrugated fiberboard. Conveniently, the netting element has a collar corresponding to each opening in the tube, said collar having an outer circumferential shape that corresponds to the respective openings and extending into the opening so as to close the flute tubes opening in said opening.
The netting element is preferably made of plastic and glued to the inside of the tube.
In a preferred embodiment, the liquid-permeable means comprises a non-return valve means which is liquid permeable only in the direction from the upper chamber to the lower chamber.
Suitably, the liquid-collecting means is a plastic bag.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to the accompanying drawings, in which
FIG. 1 is a top plan view showing a corrugated fibreboard from which a tube is to be produced, as well as a unit placed on the board and consisting of a connecting element and a plastic bag,
FIG. 2 is a top plan view showing a netting element,
FIG. 3 is an enlarged vertical section, taken along line 3--3 in FIG. 4, of a portion of a device according to the invention, showing the connecting element in more detail, and
FIG. 4 is a view of a corner portion of a container, in which is placed a device according to the invention.
DETAILED DESCRIPTION
FIG. 1 shows a rectangular corrugated fiberboard 1 which on both sides is coated with plastic and from which is to be produced a tube 2 (FIGS. 3 and 4) of rectangular cross
REFERENCES:
patent: 913325 (1909-02-01), Touzimsky
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patent: 2943169 (1960-06-01), Rice
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patent: 4319679 (1982-03-01), Gustafsson
patent: 4394144 (1983-07-01), Aoki
patent: 4614528 (1986-09-01), Lennen
patent: 5148613 (1992-09-01), Cullen
patent: 5500038 (1996-03-01), Dauber et al.
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