Apparatus for stretching continuous bands

Abstract

Abstract IN A TENSIONING ARRANGEMENT FOR THE CONTINUOUS STRETCHING OF METALLIC BANDS IN WHICH AN UPSTREAM ROLLER ASSEMBLY FRICTIONALLY RETARDS THE BAND AS IT PASSES THROUGH THIS ROLLER ASSEMBLY AND A DOWNSTREAM ROLLER ASSEMBLY PASSES THE BAND AT A HIGHER VELOCITY WHEREBY TENSION IS APPLIED TO THE BAND BETWEEN THE ASSEMBLIES. THE UPSTREAM ROLLER ASSEMBLY IS CONNECTED WITH AT LEAST ONE TORQUECONTROLLING HYDRAULIC PUMP WHOSE HIGH-PRESSURE SIDE IS CONNECTED TO THE HIGH-PRESSURE SIDE OF A TORQUE-CONTROLLING HYDRAULIC MOTOR DRIVING THE DOWNSTREAM ROLLER ASSEMBLY. A PRESSURE-REGULATING PUMP SUPPLIES HYDRAULIC FLUID UNDER PRESSURE IN COMMON TO THE HIGH-PRESSURE PUMP AND MOTOR WHILE A COUNTERPRESSURE PUMP IS PROVIDED IN THE RETURN LINE FROM THE COMMONLY CONNECTED LOW-PRESSURE SIDES OF TORQUE-CONTROLLING PUMP AND MOTOR. WHEN THE ROLLER ASSEMBLIES EACH INCLUDE A NUMBER OF ROLLS ABOUT WHICH THE BAND IS PLACED WITH AS LARGE A CONTACT ANGLE AS POSSIBLE, THE ROLLS OF THE UPSTREAM ASSEMBLY HAVE HYDRAULIC PUMPS OF PROGRESSIVELY INCREASING TORQUE OUTPUT WHEREAS THE ROLLS OF THE DOWNSTREAM ASSEMBLY TRAVERSED IN SUCCESSION BY THE BAND HAVE HYDRAULIC MOTORS OF CORRESPONDINGLY STEPPED DECREASING TORQUE.

Inventors

• 👤 Oskar Noe
• 👤 Herbert Lux

Bibliographic Details