DE1080885B - Pneumatic vehicle tires - Google Patents

Description

GERMAN

The invention relates to a pneumatic vehicle tire with a tread reinforcement insert made of at least two cord layers, at least one of which is a fabric, the warp and weft of which are essentially made up made of non-stretchable synthetic material.

Cord fabric inserts for vehicle tires made of polyamide fabric are known per se.

According to the invention, the direction of the cords for warp and weft is now each in pneumatic vehicle tires Position held in such a way that it forms an angle of ίο with the direction of the cord ίο threads of the other layer or layers includes at least 20 °. The fabric can be designed as a cross fabric, so that the cords for Warp and weft have approximately the same weight and the thread count per 10 cm of the weft threads approximately is the same as that of the warp threads, also based on 10 cm. However, it can also have a different tissue structure can be used, i.e. the thread count of the cords can be greater in one direction than that in the other, for example in that the thread density of the warp threads is substantially that of the weft threads exceeds.

According to a preferred embodiment of the invention, two fabric layers for the reinforcement insert can be used, one layer of fabric at an angle and the other in Direction is cut.

The new training leads to a tread reinforcement insert of low weight, the tire having a very high lateral stiffness and a good Has resilience in the vertical direction, which is due to the fact that the Arrangement of the layers at certain angles, the entire insert in its plane, d. H. so parallel to Carriageway level, has truss properties.

The arrangement can be in a straight form, in connection with the cord angle of the other layer or layers as explained below are used or can be at an angle of, for example 22 or 45 ° can be cut.

According to one embodiment of the invention, a layer of the reinforcement insert is from one under formed at an angle of 45 ° cut, plain weave woven fabric, while the other Position, formed from similar tissue, is used in a straight shape. A tire with this reinforcement insert has a lateral stiffness that is several times greater than that of a tire with a reinforcement insert made of cord of the same weight in the form of layers of weftless fabric is made. It does not matter which of the two layers is cut at an angle or used in a straight shape that is closest to the carcass.

Pneumatic vehicle tires

Applicant:
Dünlop Rubber Company Limited, London

Representative: Dipl.-Ing, E. Rathmann, patent attorney,
Frankfurt / M., Neue Mainzer Str. 40-42

Claimed priority:
Great Britain 23 June 1954

David Henry d'Oyly Cooper,

Birmingham, Warwickshire (UK),

has been named as the inventor

According to another embodiment, two Plain weave layers of fabric woven at an angle in the range from 10 to 35 °, for example about 22 °, cut and used as two symmetrical layers for the reinforcement insert, with the respective cords of each ply opposite angles of a corresponding degree with the Form the direction of the mid-circumferential plane of the tire cover and therefore, due to their location under double Angle to each other, the warp threads of one layer with the warp threads of the other layer an angle of Form 44 ° and the weft threads are thus arranged at an angle of 46 ° to each other.

Constructions similar to these two can be used for one finish with another, non-plain weave woven fabric can be used.

A messy tire cord ply can be in the arrangement be incorporated a reinforcement insert. Such deposits have only a small number Twists or cords in the weft, compared to the warp, which only serve to hold the warp threads to stick together. A shotless tire cord ply can be used in conjunction with fabric, which contains warp and weft threads, lengthways or transversely to its thread direction or under a middle one Angles, preferably in the range from 30 to 60 °, are cut.

Some embodiments according to the invention are composed of a single layer of cross-woven fabric when using a single layer with a shotless cord layer the following:

00Ϊ 507/144

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! reus tissue forms one layer; the other g, which consists of shotless tire cord, is cut at an angle of 0 ° (ie with the cord threads arranged in the circumferential direction on the finished tire) or at an angle of 90 ° (ie with the cord threads across the tread), whereby it is insignificant is which ply is closest to the carcass;
a cross fabric cut at an angle of 45 °, which forms a layer, with two other layers, which consist of shotless tire cord and are cut at an angle of 0 or 90 °, the order being immaterial, that is, six different arrangements can be used;

a cross-weave cut in the direction of the thread, which forms one layer, with two other layers, the consist of shotless tire cord and cut at an angle in the range of 30 to 60 ° and are arranged so that the respective cords with respect to the central circumferential plane of the tire form opposite angles. Again, six are arrangements of the three Locations possible. as

Constructions of reinforcement inserts, using layers that are once made of fabric with Chain and weft are formed and, on the other hand, weftless tire cord in a similar design as contain those just described can be made of other than cross-weave, for example from constructions, which have already been mentioned for the previous ones.

Protection only asserted in connection with the main claim.

Claims (4)

PATENT CLAIMS: 1. Pneumatic vehicle tires with a tread reinforcement insert made of at least two cord plies, at least one of which is a fabric, the warp and weft of which are essentially inextensible synthetic material, characterized in that the cords for warp and Weft each layer with the cords of the other layer or layers at an angle of at least Cross 20 °. 2. Pneumatic vehicle tire according to claim 1, characterized in that the fabric consists of a cross fabric with weft and warp threads lying perpendicular to one another. 3. Pneumatic vehicle tire according to claims 1 and 2, characterized in that the fabric has a higher thread density in one direction than in the other. 4. Pneumatic vehicle tire according to claim 1, characterized in that two layers of fabric for the Reinforcement insert can be used, one at an angle and the other in the direction of the thread is cut. Considered publications:
German Patent Nos. 739938, 877 411;
French Patent Nos. 383 223, 598 005; British Patent No. 19 171 from the
Year 1894. © 009 507/144 4.60