Disclosed herein is a contamination protection apparatus that includes a concealed linear glandular seal for providing continuous protection along an entire length of a movable table of a precision apparatus such as testing and metrology machines, laser machines, biomedical equipment, and precision fabricating...http://www.google.com.au/patents/US7478981?utm_source=gb-gplus-sharePatent US7478981 - Concealed glandular seal
