FI90883C - Cover for use in leather drying - Google Patents

Description

i 90883

BLANKET FOR USE IN DRYING SKIN

The invention relates to a cover for use in connection with a leather drying in which fresh leather is placed on a board, usually slightly tapered, arranged according to the respective leather, which is arranged with the air ducts and cuts made therein, 10 in the form of an elongate bag made of air-permeable, air-permeable material.

Such diapers serve a number of purposes, on the one hand protecting the board against dirt inside the individual leather, and on the other hand contributing to the drying of the leather by absorbing fat therefrom.

Known casings are made of relatively strong paper and most often have the shape of a slightly conical tube surrounding the central part of the board, but not its end part. This implies design is vålttåmå 20-ton consequence be interline, and working vålttåmåttomiltå paper strength and absorption properties is not porous or ilmaalåpåisevå possesses sufficient so that the board låpi brought to penetrate the air stream in contact with the skin sisåpuolen låpi shell. The sheath must therefore be shaped shorter than the board itself in such a way that some of its air vents are exposed. The air is brought to flow in the skin, ensuring sisåpuolen and the outer side of the election. In order to achieve a reasonable flow-through ratio, the known jacket typically ends at the height of the manifold, which means that it is also necessary to use a "separate piece" to protect the part of the board which is located at the cut-off stern. This paper must be attached separately, which complicates and prolongs the installation process.

35 As mentioned in the introduction, one of the purposes of the casing is to protect the board against contamination 2 caused by meat residues, blood, etc. inside the skin. The board vålttåmåton exposed setting estaå TAATAAAT purpose because tållainen subjected to setting-minenhan the root cause of a direct contact with the skin and the ent-side board of the ballot. This means, on the one hand, that the board becomes dirty and, on the other hand, that after each use of the board it should be cleaned, which is both time consuming and expensive.

To solve this problem by incomplete packaging, International Patent Application PCT / F185 / 00049 (WO86 / 00091) proposes the formation of a protective bag with a channel on a drying board or the like so that it itself forms around it. This known bag consists of two strips of paper which are glued together on their long sides by means of an adhesive seam. As for the tapered end adaptation of the drying board, the bag is further formed either by a number of longitudinal second adhesive seams which, on importation of the drying board, each tear longitudinally at the same line as the edges of the tapered end, or by a tapered end. .

In addition to the manufacturing difficulties involved in providing second or form-fitted adhesive seams, this design has the disadvantage that it tends to be sharp around the tapered end of the drying board, which due to the specific stiffness of the paper can be bent into the tapered end. . In addition, in this situation where the fitting on the drying board takes place by tearing the parallel adhesive seams in parallel, there can often be difficulties in removing the bag because it partially adheres to the board due to adhesive residues.

With said proposed bag shape, individual bags 35 can be obtained by tearing a roll from which bags of the same length with said adhesive seams are separated by cross-perforation.

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90883 3

Despite its desired fit, said bag shape thus does not solve another disadvantage in known diapers, which is due to the fact that they are not elastic or flexible and are therefore not easily suitable for boards of different sizes, such as boards used, for example, on the same side. . Therefore, it is unavoidable to buy and store diapers of the same size as there are boards, tearing as if each time the board 10 is provided with a jacket, make sure that the correct size jacket is used.

The object of the invention is to eliminate the above-mentioned drawbacks.

The invention is characterized in that it is set out in claim 1.

According to the invention, the sheath is made in the form of a tube having a uniform width and made of a flexible, tightly stretchable stretchable material having a substantially homogeneous air permeability and a certain specific elasticity / e.g. of nonwoven polypropylene fiber.

In the same way as with the above-mentioned proposed design, it is achieved at the same time that the jacket itself is air-permeable so that it can cover the entire board, and thus protect it from soiling, which makes it unnecessary to clean the board after each use. -the requirements for possible cleaning. At the same time, efficient absorption of grease from the skin is achieved, whereby the diaper of the I-30 is now in contact with the entire inner surface of the skin. The advantageous consequence of this is also that the leather becomes easier to pull from the board after the drying is completed, because there is no possibility of the leather sticking to the board. The homogeneous air permeability of the diaper 35 further achieves, in contrast to the paper material used in conventional cover diapers such as those proposed above, a better air distribution during the drying process, and thus a more uniform drying of the skins. Namely, the invention brings with it the advantage that, within certain limits, it is possible to use only a jacket of one size, because the tightly fitting stretchable and elastic jacket easily fits boards of different sizes.

If the width of the board is slightly larger than the width of the jacket in the slack space, the jacket expands slightly, while in the depressed situation it happens that the bag-shaped jacket 10 forms a flexible fold around the board, and thus closely fits it.

The soldering width and elasticity of the jacket, as well as its production in the form of a hose with a uniform width, provide the additional rationalization advantage that the jacks can be supplied as "endless" hose reels of predetermined length, such as individual jacks or roll-shaped perforations.

From the application of the pSS1 sheath according to the invention defined in the TM, a single inner sheath is made by cutting the desired length from the hose reel and closing the transversely cut piece at the other end. A suitable piece of hose is made in the nose-25, which is cut and sealed, and is then ready for use.

The sealing and cutting can take place in any suitable manner, in which, for example, tape, stapling or heat welding are used for sealing.

In the following, the invention will be described in more detail with reference to a schematic drawing showing a board on which a jacket and leather according to the invention are mounted, in which the leather has been omitted from the right half of the silicon-35 for clarity.

As can be seen, the leather 1 to be dried is placed on a wedge-shaped or tapered board 2,

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90883 5 which, prior to the introduction of the leather, is first baled with an elongate cover 3 according to the invention. The board 2, which is made of wood, has a central, sliding slit or groove 4 running from the point 5 near the top of the board over the entire length of the leather. The groove 4 communicates with substantially semicircular wood cuts 5 which open out onto narrow edges and run parallel to the plane of the board. The air flow is introduced, as shown by arrow 6, through the central tube 7, which is inserted through the mouth of the leather and the cover and leads out into the groove 4. The mucus is further distributed along the board from the cuts 5 and from the groove 4 itself.

The cover jacket 3, which has the shape of an elongate bag 15 or sock, is brought over the narrow end of the board, and in a straight position is fastened close to the wide end of the board by means of nails 8 or in another suitable way.

The sheath is made of non-woven polypropylene fiber and, as a result of its specific elasticity, 20 adapts to the size of the respective board.

In the drawing, for the sake of clarity, the leather is shown loosely fitted around the board. In practice the leather-tightly closes the board 2 and the casing 3 on the one hand the jacket ympårille rasvanimeytymistå achieve closets vålttå 25 of landless sisåpuolen contact with skin, therefore, on the one hand and working board 2 also serve the pingoituslautana. The leather 1 is not attached to the board 2 in any conventional way.

The sheath according to the invention does not necessarily have to be formed of a non-woven polypropylene fiber, but other materials with corresponding properties in terms of air permeability, melting elongation and specific elasticity can also be used.

Claims (2)

1. Coating sleeve (3) for use in connection with such skin drying, wherein the fresh skin (1) is applied to a generally tapered brid (2) adapted to the current skin, which is arranged to pass through in the formed channels (4). ) and cut-outs (5) conduct an additional air-conditioned air stream in contact with the inside of the skin, the sleeve (3) being in the form of an elongated bag consisting of a fat-absorbing, air-permeable material, characterized accordingly, that the sleeve is produced in the form of a tube, which has a symmetrical width and which consists of a resiliently resiliently tight elastic material, which has a substantially homogeneous air permeability and a certain specific elasticity, e.g. nonwoven polypropylene fibers. 2. A coating line according to claim 1, characterized in that the unit housing is produced by cutting off a desired length from the rudder roll and by transversely closing the cut length in one spirit.