FI107076B - Method for manufacture of a seal or similar as well as a seal or similar - Google Patents

Description

107076

The present invention relates to a process for the manufacture of a seal or the like, and to a seal or the like. In particular, although not necessarily, the invention is particularly useful in situations where the material of the gasket or the like is soft, possibly cellular or the like.

Gaskets, especially round gaskets, are made of many materials for very diverse purposes. For example, rubber or plastic is a material used in many forms for various sealing tasks, such as sealing two interconnected parts against leakage of liquid or gas.

Ring seals have traditionally been made round from the beginning. Thus, for example, we refer to o-rings, which are often located in a suitable groove made for this purpose in a spindle or piston. When sealing against valves or similar air leaks in, for example, aeration duct, the sealing material is often made of soft, usually foam plastic material, which is mounted at least to some extent between two surfaces to be sealed.

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When making annular gaskets, there are a few drawbacks to doing this. Manufacturing can be a relatively complex event, even though the end result is relatively simple. Often, manufacturing, as in the case of cellular plastic or the like, involves cutting an annular kappa sheet from a sheet material. It is clear that manufacturing wastes a great deal of material, since it is very rare that ring gaskets of different sizes, which can be cut into nested rings on the same sheet, would be equally needed.

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«9 30 Another obvious disadvantage with regard to the annular seal is its packaging. Namely, the annular seal requires a rather large package, which is mostly empty.

2 107076 An object of the present invention is to provide relief both for manufacture and for packaging and storage. Thus, the manufacture of a seal or the like according to the invention is simple, the material loss is extremely low and the finished seal goes into a very small space and thus also requires a small packaging.

5 However, the seal is put into final annular application about two seconds after opening the package.

The foregoing and other advantages and advantages of the present invention have been achieved as set forth in the appended claims.

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The invention will now be described in more detail with reference to the accompanying drawings, in which:

Figure 1 shows a seal or the like according to the invention as it is after manufacture and in its packaging; and

Fig. 2 shows the seal of Fig. 1 in a ready-to-use condition.

The method according to the invention will become clear from the following description.

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Figure 1 thus shows a top view of an embodiment of the invention as it is after manufacture and Figure 2 shows it in a ready-to-use seal from the same v 'direction.

The material of the gasket 1 or the like according to the invention is made of a suitable soft material, such as foam, but it is to be understood that the invention is in no way limited thereto.

The seal 1 is made of a sheet material of a thickness 30 such that the intended seal is achieved when the seal is applied to its application under the prevailing conditions there. The sheet material is cut into an elongated portion, which may be even or, if required, in width. . be different in its length. The ends 2, 3 of the piece 1 are bevelled approximately symmetrically, as shown so that the "brush" of the end is approximately centered on the width of the piece 1.

The outer sides of the piece 1 in FIG.

As such, seal 1 is extremely compact and easy to place in a small package for sale. Sales packages are easy to stack side by side and 10 on top of each other to produce a package of minimal volume. Such a package is easy to store and transport at the lowest possible cost.

Figure 2 shows a seal according to the invention or the like in operative condition. It 15 is a completely circular annular piece identical to a piece cut from a sheet of material to an initially annular shape.

Figure 2 is self explanatory. The ring is simply formed by turning the surfaces of the cut 5 outwards, i.e. by rotating the piece inside out. The oblique surfaces of the ends 2 and 3, when turned against each other, form a sealed joint and the seal settles into a circular annular shape by itself. The outer sides 4 of Figure 1 now form the inner side of the seal 1.

It will be appreciated that if the seal is such that it cannot be returned to the form of Figure 1, glue may be applied to the oblique surfaces of the ends 2 and 3 to permanently bond them or the oblique end portions or at least one of them .

The foregoing has focused on depicting a gasket or the like, which in its final form is annular and circular. If changes in circular shape are desired, this means that in the embodiment shown in Figure 1, indentations are added at appropriate points along its length, whereby in the final application an angle of size depending on the notch width, i.e. how narrow or wide the notch is made , when the seal or equivalent is 4 107076 inverted. Obviously, when making the cut, the inner surface, which in the final use is the outer surface, is left to hold the structure together.

It will be appreciated that although only the seal has been discussed above, the structure 5 of the invention may be applied for any other purpose, such as making a ring toy or other purpose which is not self-evident in this context.

Claims (7)

5 107076 A method for making in its final form an annular seal or the like made of a soft material, characterized in that: 5. a strip (1) of seal material is made twice the width of the seal, - the strip ends (2, 3) are formed as oblique surfaces, cutting the slit (5) into the central regions of the strip to extend almost to the end surfaces of the strip; and 10. rotating the strip (1) for final use so that its outer surfaces form the inner surfaces. Method according to claim 1, characterized in that recesses are formed on the outer surface thereof to form a seal in a shape different from the circular 15 in its operating state. Method according to Claim 1, characterized in that the ends of the sealing strip are shaped in a symmetrical ridged shape, whereby the slit (5) extends almost to the tip of the brush. 20 4. In its final form, an annular seal or the like, made of a soft material, characterized in that it consists essentially of a strip (1) of width twice the width of the final seal and has a substantially central section ( 5) which extends into the immediate vicinity of the ends (2, 3) and which, when turned over, forms a ring. =>. A seal according to claim 4 or the like, characterized in that its material is made of plastic, in particular cellular plastic. 30 A seal according to claim 4 or the like, characterized in that it has recesses on its outer sides for making the seal different from a circular shape in its final application. β 107076 Gasket according to Claim 4 or the like, characterized in that it contains at least one bump when turning its opposing surfaces with adhesive material. 5 7 107076