Doctor Knife

Name:
Doctor Knife
Detailed information:
A metal straightedge (or equivalent) that detaches adhering product from a rotating drum or roll, or removes excess coating from a web. No cutting is involved.

Use:

To scrape dried films, such as soap flakes, from drum dryers; to remove ink from printing rolls; clean residual paper stock from rolls and to provide a crimped paper for toweling, etc.; and to remove soft or sticky rubber and adhesive compositions from mixing rolls. An interesting application is the so-called air doctor (air knife); it is actually a stream of air delivered by a turbine blower through a tube with a discharge slot. Located at the take-off end of a paper-coating machine, it efficiently levels off the coating suspension across the full width of the web.