STEEL RULE ROTARY DIE AND METHOD OF MAKING SAME

• US 3,805,657 A
• Filed: 12/28/1971
• Issued: 04/23/1974
• Est. Priority Date: 12/28/1971
• Status: Expired due to Term

• Current Assignee: Wachovia Bank NA (Wells Fargo & Company)
• Original Assignee: Jack R. Simpson
• Inventors: Simpson, Jack R.
• Primary Examiner(s): Meister, J. M.
• Application Number:
  US05/213,016
• Time in Patent Office: 847 Days
• Field of Search: 83/522,665,669,670,673,701 76/17C
• US Class Current: 83/522.24
• CPC Class Codes: B23P 15/406 rotary or plane die cutters
• CPC Class Codes: B26F 1/384 using rotating drums
• CPC Class Codes: B26F 1/44 Cutters therefor; Dies therefor
• CPC Class Codes: B26F 2001/4463 Methods and devices for rule setting, fixation, preparing cutting dies
• CPC Class Codes: C14B 5/02 Stamps or dies for leather articles
• CPC Class Codes: Y10T 83/862 To another component of tool assembly
• CPC Class Codes: Y10T 83/9377 Mounting of tool about rod-type shaft
• CPC Class Codes: Y10T 83/9387 Punching tool
• CPC Class Codes: Y10T 83/97 Miscellaneous

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.

Claims

1. A metal rule rotary die comprising a die plate of predetermined shape and thickness extending straight in one direction and arcuately with a predetermined radius in a transverse direction, the convex surface of said die plate having a plurality of raised lines thereon extending in mutually perpendicular directions, said die plate having a plurality of metal rules held thereby and extending therefrom, said die plate being made of a plastic material.

2. A metal rule rotary die comprising a die plate of predetermined shape and thickness extending straight in one direction and arcuately with a predetermined radius in a transverse diRection, said die plate having a scale in the form of raised lines extending along two mutually perpendicular edges thereof, said die plate having a plurality of metal rules held thereby and extending therefrom, said die plate being made of a plastic material.

3. A metal rule rotary die comprising a die plate of predetermined shape and thickness extending straight in one direction and arcuately with a predetermined radius in a transverse direction, the convex surface of said die plate having raised lines thereon, said die plate having a plurality of metal rules held thereby and extending therefrom, said die plate having a plurality of separable inserts therein, extending completely through said plate, said inserts being selectively removable to provide openings extending through said die plate, said die plate being made of a moldable, polyurethane foam material and having an apparent density of 32 to 42 pounds per cubic foot.

4. A metal rule rotary die comprising a die plate of predetermined shape and thickness extending straight in one direction and arcuately with a predetermined radius in a transverse direction, said die plate having a plurality of separable inserts therein, extending completely through said plate and being flush with the convex surface thereof, said inserts being selectively removable to enable the resulting openings to receive fasteners to mount said die plate on a support, said die plate having a plurality of metal rules held thereby and extending therefrom, said die plate being made of a plastic material.

5. A rotary die according to claim 4 characterized by said inserts being made of the same plastic material as said plate.