Drive system for a carding machine including doffer zone draft setting

In a carding machine including a plurality of rotary fiber processing rolls arranged in succession as viewed in a direction of fiber advance through the carding machine;

• means for varying an output speed of the carding machine by varying the rpm of one of said fiber processing rolls;
• the carding machine having a doffer zone containing some of the fiber processing rolls;
• the improvement comprising
• (a) a first electromotor connected to at least one first of said fiber processing rolls in said doffer zone for rotating said at least one first fiber processing roll;
• (b) a first control and regulating unit connected to said first electromotor;
• (c) a second electromotor connected to at least one second of said fiber processing rolls in said doffer zone for rotating said at least one second fiber processing roll;
• (d) a second control and regulating unit connected to said second electromotor;
• and
• (e) a draft setting device connected to said first and second control and regulating units for automatically varying a ratio between the rpm of said at least one first fiber processing roll and the rpm of said at least one second fiber processing roll for automatically varying a draft when said means for varying said output speed alters the output speed of the carding machine.