Method and apparatus for packaging a number of substantially cylindrical packages

Abstract From the Canadian patent

A b s t r a c t, A method and an apparatus for packaging a number of substantially cylindrical packages consisting of a within certain limits elastic insulation material for instance, mineral wool, said packages having open ends but being, at their side faces surrounded by a substantially airtight foil layer, by which method the open ends of the packages are temporarily closed in an essentially airtight way the, volume encased by the foil layer and the temporary sealings being connected to a vacuum source to reduce the volume of the packages, the packages thus reduced being enclosed in a tight enclosure before the vacuum is disconnected. To use the compression by means of vacuum not only …