Low pressure, high temperature dye beck

Claim 1

IN A DYE MACHINE FOR DYEING FABRICS IN ROPE FORM MOVING THROUGH A DYE LIQUOR AT A TEMPERATURE ABOVE THE BOILING POINT OF THE DYE LIQUOR AT ATMOSPHERE AND UNDER AN ELEVATED PRESSURE, THE IMPROVEMENT COMPRISING: A PRESSURE TANK HAVING A DYE LIQUOR THEREIN AT A PREDETERMINED LEVEL AND A SUPERPOSED BODY OF GAS; MEANS IN SAID TANK FOR ENDLESSLY MOVING THE FABRIC THROUGH THE DYE LIQUOR AND THE SUPERPOSED BODY OF GAS; CONDUCTION HEATING MEANS POSITIONED IN THE TANK BELOW THE PREDETERMINED LEVEL OF THE DYE LIQUOR THEREIN FOR HEATING THE DYE LIQUOR AND THEREBY INCREASING THE PRESSURE OF THE SUPERPOSED GAS AND CAUSING THE DYE LIQUOR TO CIRCULATE; AND A U-SHAPED DUCT IN OPEN COMMUNICATION AT ONE END THEREOF TO THE INTERIOR OF THE TANK AT A LEVEL ABOVE THE PREDETERMINED LEVEL OF DYE LIQUOR THEREIN AND AT THE OTHER END THEREOF TO THE ATMOSPHERE ABOVE ITS OPENING INTO THE TANK, SAID DUCT BEING FILLED WITH A LIQUID AND PROVIDING A LIQUID SEAL