SCREW CONVEYOR UNIT COMPRISING A HOUSING AND HOLLOW HELICAL SCREW THROUGH WHICH A COOLING LIQUID MAY BE PASSED THEREBY COOLING A HEATED MASS BEING MOVED THROUGH THE HOUSING BY THE SCREW

SCREW CONVEYOR UNITS COMPRISING A HOUSING AND A HOLLOW HELICAL SCREW THROUGH WHICH A LIQUID OR GAS MAY BE PASSED THEREBY HEATING OR COOLING A MASS BEING MOVED THROUGH THE HOUSING BY THE SCREW