Abstract: A corrugator paste or adhesive manufacturing system provides a viscosity testing tank which is separate from other tanks used in the system. Separate storage tanks are provided for storing each of a plurality of different pastes or adhesives. A closed loop system or network of pipes circulates paste or adhesive from a mixing tank or tanks and from each of the storage tanks through a viscosity monitoring station, and then back to the storage tanks after a viscosity test is performed in the testing tank. An electronic control circuit allocates a time for giving each tank access to the viscosity monitoring station and for comparing the measurements during each such time with a pre-stored criterion for the paste or adhesive that is then being measured. If the viscosity read at the monitoring station corresponds to the stored criterion, the adhesive is returned to its proper storage tank.

Abstract: A starch based adhesive is made in an agitator tank which has a first rotatable propeller shaft with a plurality of propellers distributed along the length thereof. Each of at least some of the propellers is surrounded by an apertured shroud, which could be made of expanded metal or the like, for example. Above the propeller shaft is a second rotatable shaft having a plurality of high speed shearing blades affixed thereon. The two shafts are preferably driven by separate motors, the shearing blades being driven by a motor having approximately 4-5 times the power of the motor driving the propeller shaft in order to impart a comparably larger amount of energy to the slurry via the shearing blades as compared to the energy imparted by the propellers.