Describes the critical features of the stock jet geometry for a hydraulic headbox installed on a twin-wire paper machine. Discusses the importance of sheet formation and describes the stock jet geometries that affect formation and other sheet properties. Covers some common headbox adjustments and other settings that can affect the stock jet geometry.
•Describe the purpose of the headbox in the papermaking process
•Define the terms "jet length," "jet angle," and "jet impingement"
•Identify the jet length, jet angle, and jet impingement in a stock jet diagram
•Describe the impact of stock jet geometry and sheet formation on the appearance and strength properties of the sheet
•Describe the effects of the slice opening and fan pump speed on stock jet geometry
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