Inker

noun

1. A device on a recording instrument by which the dot or trace is made.
2. One of the large rollers on a printing-press which apply the ink to the type.
3. One who, or that which, inks; especially, in printing, the pad or roller which inks the type.
4. A person or device that applies ink.
5. In comic book production, a person who fills in material outlined by the comic book author.