Abstract: The invention relates to a drying device for drying a product comprising: a housing having a drying chamber, a product inlet at a first end and an product outlet at a second end; a drying rotor arranged rotatable within the drying chamber and having at least one helical groove at the outer surface thereof; a screw having a flight with a flight channel there between and arranged rotatable within the drying chamber and substantially parallel to the drying rotor; a driving mechanism configured for driving the screw in rotation around a screw axis; and a heater for providing thermal energy to the drying chamber, wherein the drying rotor and/or the screw at least are configured for moving the product from the first end to the second end, and such that the flight of the screw engages into the at least one helical groove of the drying rotor.

Abstract: The invention relates to a sealing mat comprising a carrier sheet provided with a multiplicity of sealing elements for sealing test tubes. The carrier sheet, on the one hand, and the sealing elements, on the other hand, are made from different materials. The sealing elements can be made from a flexible and/or resilient material. The carrier sheet can be made from a material that is relatively stiff compared with the material of the sealing elements. The sealing elements can be detachably fixed to the carrier sheet. The sealing elements can be fixed to the carrier sheet such that they detach therefrom when the carrier sheet is pulled away while folding it over towards the rear, after sealing one or more test tubes.

Abstract: A test tube includes a dot code on the surface thereof which is readable with an optical reading mechanism wherein the dot code is formed on the test tube by laser burning.