Method and apparatus for measuring and controlling the application of elastomers and adhesives to a substrate

摘要

A resonant cavity frequency sensing device is used to sense the moisture content of a substrate. Data obtained by the sensing device can be used in a feedback loop in the apparatus employing the device, to help control the operation of the apparatus in order to obtain consistent results. The sensor may employ one pair of sensing plates (48) or an array of pairs of sensing plates to obtain data from each part of the substrate. In an illustrated embodiment, the device is used to monitor and control dip uptake in a fabric (42) adhesive dipping process. <IMAGE>