US PATENT SUBCLASS 137 / 92
.~.~ By viscosity or consistency

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
88  DF  .~ Mixture condition maintaining or sensing {4}
92.~.~ By viscosity or consistency

DEFINITION

Classification: 137/92

(under subclass 88) Systems in which the condition maintained or sensed is viscosity or consistency.

(1) Note. Due to their similarity with systems classified in this subclass, systems are also included in which the viscosity or consistency of a stream is sensed and in response thereto the subsequent addition of water is controlled in order to produce a predetermined or desired viscosity or consistency.

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4, for the corresponding process.

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162, Paper Making and Fiber Liberation,

258, and 380 for systems for maintaining the consistency or viscosity of paper making pulp combined with paper making apparatus.