Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Molecular weight
Reexamination Certificate
2005-08-09
2005-08-09
Cygan, Michael (Department: 2855)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Molecular weight
C073S061720
Reexamination Certificate
active
06925857
ABSTRACT:
A method of determining an average length of reinforcing fiber in a sample of reinforcing fibers is disclosed. A sample of reinforcing fibers is weighed to obtain a total sample weight. The sample of reinforcing fibers is placed in a fiber separating mechanism and suspended in water. The water is stirred after which the water is allowed to settle such that the sample of reinforcing fiber divides into a plurality of fractions in separate sections of the fiber separating mechanism. Each fraction has reinforcing fibers of substantially similar lengths and is separately weighed. An average fiber length is calculated from the relative weights of each of the plurality of fractions and the total sample weight. In addition, a method of determining an average length of a reinforcing fiber in a composite material having a resin and a plurality of reinforcing fibers is disclosed.
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Rannenberg Chris
Weber Charles
Composite Products, Inc.
Cygan Michael
Moore, Hansen & Sumner PLLP
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