Drying and gas or vapor contact with solids – Process – Sheet or web contact preventing by spacer sheet – web – or strand
Patent
1995-06-27
1997-08-26
Sollecito, John M.
Drying and gas or vapor contact with solids
Process
Sheet or web contact preventing by spacer sheet, web, or strand
34115, 162290, 162296, F26B 700
Patent
active
056599730
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for removing liquid on a gauze conveyor, the gauze conveyor having an upper side for carrying products, and being provided with link portions and having a gauze pattern, the device having means for removing liquid by extraction placed directly under the gauze conveyor.
The invention also relates to a method for removing liquid on a gauze conveyor, in which method such a device is used.
Such a device and method for removing liquid on a gauze conveyor are known from WO-A-9013347.
A method and a device for removing liquid on a gauze conveyor are generally used in industrial washing devices in which products are conveyed through a washing and drying installation by means of one or more gauze conveyors. Generally washing occurs in two or more stations of the washing installation where the products which are situated on the gauze conveyor are washed, for example, with the help of sprinklers. Under the sprinklers and the gauze conveyor tanks for collecting the liquid which goes through the gauze conveyor are located. The liquid collected in the tanks is generally reused for washing. It is, however, desirable that no transfer of liquid takes place between the stations. If for example, per station another liquid is used, an undesirable mixing of the liquids in the tanks could occur as a result of liquid transfer. From an economical point of view it is moreover advisable that as little liquid as possible is conveyed from the washing to the drying installation.
In practice it has, however, appeared that due to the gauze conveyor the liquid is conveyed further and is unwantedly transferred to other processing stations.
In order to reduce this unwanted transfer, methods and devices other than the ones described in WO-A-9013347 are known for removing liquid on a gauze conveyor.
For example, it is known to remove liquid on products which are located on a gauze conveyor with the help of a device for generating high air pressure, which device is located above the gauze conveyor. Although liquid can thus be removed from the product in an efficient way, the distance between the high air pressure device and the conveyor is too large to also remove liquid efficiently from the conveyor.
Wiping off the lower side of the conveyor with the help of a brush is also known. This treatment is limited to the lower side of the conveyor, however.
It is, amongst others, an object of the present invention, to provide an alternative method and device for removing liquid on a gauze conveyor, whereby the unwanted transfer of liquid through the gauze conveyor is prevented in a more efficient way.
For this purpose according to one aspect of the invention a device for removing liquid on a gauze conveyor as defined in the opening paragraph is characterized in that the means are formed by a hollow, rotatable roll which is provided with projecting teeth, the teeth fitting into the gauze pattern and the link portions being enclosable by the teeth, and with holes between the teeth which extend into the cavity of the roll, and in that the cavity of the roll is connected to an extractor means. As the link portions are enclosed by the teeth, the extraction is conducted close to the link portions, the latter providing an effective removal of the liquid. As the holes in the roll move with the conveyor the period of operation of the extraction on the conveyor is sufficient to remove the liquid and no separate driving is needed for the roll.
A further preferred embodiment of a device according to the invention is characterized in that a pipe is arranged in the cavity of the roll, the roll being rotatable around the pipe, and in that the pipe is provided on its side directed towards the conveyor with openings placed in a pattern. If the holes in the serrated roll correspond to the openings in the pipe, a strong, efficient extraction of the liquid occurs.
Preferably the openings are countersunk so that extraction on the upper side of the roll is guaranteed at any position. Thus lateral movement of the gauze conveyor and the ro
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De Jong Jurjen Jan
Lazarz Donald
American National Can Co.
Gravini Steve
Sollecito John M.
VMI-Epe-Holland B.V.
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