FI68420B - SPAENNBRAEDES IN SKYDDSPAOS - Google Patents

Description

68420

Backboard protective bag

The invention relates to a protective bag for facilitating the papermaking of raw fur backboards used as a drying mold. The backboards are used for drying the skins of foxes, soups, male and female mink and other small fur animals. A layer of paper of suitable absorbency and porosity must be used between the backing board and the fresh fur to promote drying of the leather 10 and to prevent the formation of mold and adhesion of the leather to the backing board.

In some cases, old newspapers are used for papermaking, but nowadays most commonly 42 -80 cm unbleached paper-15 sheets made of sulphite cellulose. The paperwork is done by hand by wrapping a sheet or sheets around the backboard. The wrapper is attached with tape joints. The paperwork time varies depending on the size of the backboard. Two sheets of paper must be used for papering fox and supitan and one sheet for papermaking 20.

The disadvantages of the current practice are the slowness of the work, the loss of material and the mold damage to the skins caused by the partial failure of the paper. In most fur farms, the papering phase is perceived as a frustrating work step in the busy work rhythm of fur-25 animals during the skinning period.

The protective bag according to the invention provides a decisive improvement in the above-mentioned drawbacks. To achieve this, the protective bag according to the invention is characterized by what is set forth in the characterizing part of claim 30.

By using the protective bag according to the invention in the papermaking of fur stanzas, the efficiency of the work step can be doubled and the consumption of raw materials reduced by 40-50%.

68420

In the following, the invention will be explained in detail with reference to the accompanying drawing.

Figure 1 shows the backboard schematically.

Figure 2 shows a protective bag according to the invention.

5 Figure 3 illustrates the placement of the protective bag on the backboard.

Figure 4 shows a pre-paperized backboard.

Figure 5 shows schematically the working arrangement when papering with a protective bag according to the invention.

Fig. 1 schematically shows a backboard 1 used in the drying of fur, in which a cavity and grooves have been machined to promote the drying circuit. Figure 2 shows a backboard protective bag 2 according to the invention. The bag consists of two sheets of paper 3 joined together by 1 glue seam. The adhesive seams break at the tapered tip of the bag 15 at the edge of the papers, leaving an opening 5 for the blowing air supply connection. The adhesive seams are shaped and dimensioned so that the support points are evenly distributed on the curved parts of the backboard and the protective bag. In this case, the paper can withstand the stress of pulling on the back of the fur. The flanges 4 of the bag are necessary for mechanical continuous web production. The bags are made in succession on a single roll web, from which they can be detached one by one during the papermaking step of the sheets using a transverse tear seam 25. Paltteista 4 is useful in drying, because they can be turned against the skull side of the surface of the skin to absorb moisture and fat from this point, Sessa nahoituk difficult to clean.

Figure 3 shows the bag placed on the backboard. The tip of the backboard is first placed in the opening in the back of the bag and the board and the bag are completely nested with one hand movement. Figure 4 shows a bag-backed backboard.

Fig. 5 is an example of an arrangement of work in the papermaking of rear boards with protective bags according to the invention.

With one hand, the worker grabs the end of the protective bag 2 that unloads from the roll and with the other hand takes the backboard 1 from the stack, after which the head performs! lopujotuksen.