VERFAHREN ZUR HERSTELLUNG EINES ELASTOMEREN STREIFENS.

摘要

A method of manufacturing an elastomeric strip comprising the steps of forming a zig-zag wire or slotted metal or plastics carrier (5) with longitudinally spaced transverse members (9), the spacing of which is controlled by means (11), such as strands connected to the members (9), extending longitudinally of the carrier and then extruding elastomeric material (7) over the carrier, and subsequently degrading said means (11) at selected longitudinal and transverse positions in the strip to change the characteristics of the strip at those selected positions. The degrading is preferably achieved using ultrasonics, which has been found can cause a breakdown of the strands which are otherwise able to withstand normal extrusion nd curing temperatures.