Steel rule rotary die and method of making same

Abstract

Abstract A steel rule cutting die, particularly of the rotary type, is provided with an improved die plate or board. The new die plate is preferably made of a foamed plastic material which has a number of advantages over those heretofore known. The new die plate is of precise, uniform thickness throughout its length and width and the thickness of all die plates is always consistent. This consistency and uniformity enables a layout for the die plate to be drawn directly thereon without the use of expensive auxiliary layout or drawing equipment. Further, the new die plate will not change in thickness or warp due to humidity or temperature changes. The plate also is made with a precise radius of curvature so as to fit smoothly, without forcing, on a die cylinder or roll of a rotary cutting die machine. The die plate can further be provided with layout lines molded thereon to facilitate drawing a layout thereon. Countersunk holes for fastening the die plate to the die cylinder can also be molded directly in the die plate. Other indicia, such as scale lines along mutually perpendicular edges of the die plate to aid in drawing the layout with special T-squares, arrows to indicate direction of rotation, and marks for bridges, may also be molded directly on the die plate. It is also possible to mold steel cutting rules into the die plate.

Inventors

• 👤 J Simpson

Bibliographic Details