Paper Machine Doctor Blade Components and Troubleshooting

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Doctors are used on paper and board machines to remove excess water and contaminants from roll and cylinder surfaces, and to remove the sheet from these surfaces during sheet breaks and threading. Doctors must be properly installed and maintained to ensure their continued safe and efficient operation. It is important to examine worn blades and document wear patterns, and work with doctor and blade manufacturers to identify problems and improve doctoring operations. This course lists the potential causes and possible remedies for some well-known blade wear patterns. It also lists the steps necessary to properly install a doctor.