Paper Machine Doctors

Doctors are used in all sections of paper and board machines to remove excess water and contaminants from roll surfaces. In some applications, they are also used to remove the sheet from roll surfaces on sheet breaks or during sheet threading. Doctors must be checked and inspected on a regular basis to ensure their continued, safe, efficient operation.

•Identify the two main functions of paper machine doctors •Identify and describe the safety hazards associated with roll doctors and doctor blades •Identify the key components of a doctor •Identify the purpose of the doctor components •Differentiate between mechanically-adjusted and self-conforming blade holders •Identify typical locations for doctors on paper and board machines •Explain the importance of regular doctor and doctor blade inspections •Identify and describe key inspection points for doctors and doctor blades