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

CORKING THE STEEL-DIE FORM

After the make-ready for a cutting and creasing form has been completed, the form must be corked so as to prevent the sheets of box-board from adhering to the cutting rules as each impression is taken. One good method of corking is gluing rows of small-size corks to the wood furniture in the form, the rows of corks placed on either side of all cutting rules in the form. In the case of metal furniture, the corks are glued to flat, solid places in the metal furniture, or are inserted in the small, open places in labor-saving lead furniture, as the case may be. The corks when properly glued or inserted, should stand up about one-quarter-of-an-inch above the steel cutting rules, so that when an impression is taken on a sheet of box-board, the corks will have force enough to “push” the sheet off the cutting rules.

Another method of corking is that done with long strips of cork, high enough for the purpose. These strips of cork are glued on the metal or wood furniture in the same way as individual corks are applied. The Armstrong Cork Company, of Pittsburgh, Pa., can supply cork in strips made expressly for use on cutting and creasing presses. Use LePage glue in applying the corks, and put on plenty of strip cork, or individual corks, so that the sheets will leave the form without breaking.