A method of fabricating an insulating unit includes the steps of: providing a pair of sheets and a substrate; forming the substrate into at least one spacer section having a base and a pair of outer legs connected to the base, the spacer section having a surface designated as a supporting surface; providing...http://www.google.de/patents/US6223414?utm_source=gb-gplus-sharePatent US6223414 - Method of making an insulating unit having a low thermal conducting spacer
