Patent ID: 7096728
Filing Date: 2006-08-29
Classification: B29C,G01N

Abstract:
1. A system for measuring the extensional properties of a sample, comprising: an armature; a motor drive shaft attached to the armature; a transducer shaft; a fixed cylinder attached to the transducer shaft; and a moveable cylinder, wherein the sample is attached to the moveable cylinder and the fixed cylinder so that a portion of the sample not touching the moveable cylinder and not touching the fixed cylinder extends from a tangent of the moveable cylinder to a tangent of the fixed cylinder, wherein the moveable cylinder is rotated around an axis of the fixed cylinder by rotating the motor drive shaft at a substantially constant rotation speed, wherein the moveable cylinder is rotated around an axis of the moveable cylinder at approximately the substantially constant rotation speed, wherein a resistance from the sample is created as the sample is stretched between the moveable cylinder and the fixed cylinder by the rotation of the moveable cylinder around the axis of the fixed cylinder and the rotation of the moveable cylinder around the axis of the moveable cylinder, and wherein a torque on the fixed cylinder created by the resistance is translated to the transducer shaft and measured on the transducer shaft.