Hollow cassette in shape of arc segment

摘要

The hollow segments (1) have an opening (1,2) at one end which is stepped down so that it fits into the open end (1.1) of the next cassette. The units are build-up to form a rigid wheel rim structure. Before assembly the stepped down sections are covered with e.g. a heat setting adhesive. To avoid having to distort the wheel during assembly of the last unit, the wheel rim is built-up from two halves which are plugged together. The wheel rim can be covered with fibre bonded plastics sheets to further reinforce it. The wheel rim is used e.g. for mounting between the outer rim and the hub of wheels running on rails.