How Paper Boxes Are Made / A practical and instructive book telling how the beginner may manufacture all kinds of paper boxes, with special chapters on the printing department for paper box plants, embossing, gold-leafing, label work, etc.

by Robert F. Salade

ACCURACY REQUIRED

The die should be blanked out so accurately that when the quoins are tightened all material in the die will “lift” without any of the furniture falling out. After the form has been locked up, the die-maker rests one end of the chase on a block of furniture. He then strikes the ends of the fingers over all material in the die to see if any parts of the die are loose. If all holds firmly, the form is ready for press. If any parts are found loose, the form is unlocked, and the loose places are fixed up by inserting small strips of manila paper between the loose pieces of furniture.

With the aid of a straight-edge, an L-square, or a T-square, the die-maker tests all lines of the die to ascertain if any rules are binding or out of register. All defects of this nature must be corrected before the die goes to press.

Intricate rule bending is made more easy by heating the soft steel rule in a gas flame before bending. When working with heated rule the die-maker wears canvas gloves to protect his hands. To harden soft rule, after bending, heat again and dip the heated rule in fish oil.