I found a site about "chase" the wooden frame in which type
was placed and locked, prior to printing in the old days.
Here's a picture, scroll down half way:
http://216.239.53.104/search?q=cache:6wXjdT6-IYgJ:www.balanceresearch.com/museum/gallery/typset01/enlarg01.htm+typesetting+chase&hl=en&ie=UTF-8