This U.S. industry comprises establishments primarily engaged in manufacturing blankbooks, looseleaf devices, and binders. Establishments in this industry may print or print and bind. Cross-References. Establishments primarily engaged in-- ? Checkbook printing--are classified in U.S. Industry 323116, Manifold Business Forms Printing; and ? Binding books without printing in the same establishment--are classified in U.S. Industry 323121, Tradebinding and Related Work.