Elastomeric scrap ejector for a cutting die

• US 5,636,559 A
• Filed: 03/08/1995
• Issued: 06/10/1997
• Est. Priority Date: 10/07/1993
• Status: Expired due to Term

• Current Assignee: Wachovia Bank NA (Wells Fargo & Company)
• Original Assignee: Jack R. Simpson, James M. Smithwick Jr, Jeffrey Geer
• Inventors: Simpson, Jack R., Geer, Jeffrey, Smithwick, James M. Jr.
• Primary Examiner(s): Rada, Rinaldi I.
• Assistant Examiner(s): Dexter, Clark F.
• Application Number:
  US08/400,547
• Time in Patent Office: 825 Days
• Field of Search: 83/116-118, 83/123-126, 83/128, 83/138-140, 83/658, 83/659, 83/669, 83/670, 83/142, 83/143, 83/145, 493/82, 493/83, 493/342, 493/373, 493/472
• US Class Current: 83/116
• CPC Class Codes: B26D 7/1818 by pushing out
• CPC Class Codes: Y10T 83/2107 For radial movement of product
• CPC Class Codes: Y10T 83/2133 By resiliently biased ejector
• CPC Class Codes: Y10T 83/2157 Elastomeric stripper contacting product

Abstract

A resilient-scrap ejector is provided for a cutting die. The scrap ejector includes an elongated body made of a resilient material. The elongated body includes a longitudinally-extending web. A plurality of lugs extend from opposite sides of the web and are separated by notches. The notches provide void spaces which allow for deformation for the elongated body when the elongated body is subjected to compressive forces. The scrap ejector is located in a cavity or recess formed in the cutting die for ejecting and stripping scrap severed from the blank. By providing displacement zones or voids, the height of the scrap ejector can be increased without compressing the material beyond the limits of its resiliency.

Claims

1. In a cutting die for cutting corrugated board including a die board and a plurality of cutting rules projecting from the surface of the die board, said cutting rules defining a cavity, the improvement comprising a resilient scrap ejector mounted in said cavity for ejecting scrap from said cavity, said scrap ejector including:

a) an elongated web made of a resilient material and including a top surface and a bottom surface;

b) a plurality of first resilient lugs integrally formed with the web and projecting upwardly therefrom in longitudinal spaced apart relationship such that the lugs form the top surface of the scrap ejector and the lugs project upwardly and away from the die board;

c) a plurality of first notches formed between said first lugs;

d) a plurality of second resilient lugs integrally formed with the web and projecting downwardly therefrom in longitudinal spaced apart relationship such that the lugs form the bottom surface of the scrap ejector and the lugs project downwardly from the web and against the die board;

e) a plurality of second notches formed between said second lugs.

2. The cutting die of claim 1 wherein said first and second lugs are staggered with respect to one another.

3. The cutting die of claim 2 wherein said first and second lugs are shaped complimentary with respect to said first and second notches so that the scrap ejector can be nested with another such scrap ejector.

4. The cutting die of claim 1 wherein said lugs each include a pair of generally planar side walls extending from said elongated web, said contact face forming part of a respective one of the top and bottom surfaces, and a generally planar contact face disposed in a plane substantially parallel to the longitudinal axis of said elongated web.

5. The cutting die of claim 4 wherein at least one of said side walls is inclined with respect to the longitudinal axis of said web.

6. The cutting die of claim 5 wherein both of said side walls are inclined with respect to the longitudinal axis of said web.

7. The cutting die of claim 4 wherein a first one of said walls is inclined at an angle more than 90°

from the longitudinal axis of said web and the second side wall is disposed at an angle of not more than 90°

with respect to the longitudinal axis of said elongated web.

8. A cutting die including a die board, at least one cutting rule extending from the die board and having a cutting edge, the cutting rule in part forming a cavity with the die board, and an elongated resilient scrap ejector positioned in the cavity, the scrap ejector including a web, a top portion extending above the cutting edge of the cutting rule and a bottom portion adjacent the die board, the top portion including a plurality of lugs that project upwardly from the web and away from the die board and a plurality of open upper notches disposed between the upwardly projecting lugs;

the bottom portion including a plurality of lugs that project downwardly from the web and toward the die board and a series of notches disposed between the downwardly projecting lugs, the lugs of the bottom portion forming a bottom surface which is disposed against the die board;

the lugs including first and second side walls and wherein the first side wall is inclined at an angle of more than 90°

with respect to the longitudinal axis of the scrap ejector and the second side wall disposed at an angle of not more than 90°

with respect to the longitudinal axis of the scrap ejector such that the lugs bend in the longitudinal direction of the scrap ejector when subjected to a compressive force.

9. A cutting die including a die board, at least one cutting rule extending from the die board and having a cutting edge, said cutting rule forming a cavity with the die board and an elongated resilient scrap ejector positioned in the cavity, said scrap ejector having a top portion extending above the cutting edge of the cutting rule and a bottom portion adjacent the die board, said top and bottom portions each including a plurality of alternating lugs and notches, the notches forming displacement zones for the lugs, and wherein the lugs and notches along the top portion are staggered with respect to the lugs and notches along the bottom portion, and the lugs along the bottom portion form a bottom surface which is disposed against the die board.

10. A cutting die for cutting corrugated paper board including a die board, at least one cutting rule extending from the die board and having a cutting edge, the cutting rule in part forming a cavity with the die board, and an elongated scrap ejector positioned in the cavity and having a web, a top portion extending above the cutting edge of the cutting rule and a bottom portion adjacent the die board wherein;

the top portion includes a plurality of lugs that project upwardly from the web and away from the die board and a plurality of open upper notches disposed between the upwardly projecting lugs; and

wherein the bottom portion includes a plurality of lugs that project downwardly from the web and toward the die board and a series of open lower notches disposed between the downwardly projecting lugs, the lugs of the bottom portion forming a bottom surface which is disposed against the die board.

11. The cutting die of claim 10 wherein the profile of the lugs and notches along the top portion compliments the profile of the lugs and notches along the bottom portion so that the scrap ejector can be nested with another such scrap ejector.

12. The cutting die of claim 10 wherein said lugs include two opposing, generally planar side walls.

13. The cutting die of claim 12 wherein at least one of said side walls is inclined with respect to the longitudinal axis of said scrap ejector.

14. The cutting die of claim 12 wherein a first one of said side walls is inclined at an angle of more than 90°

from the longitudinal axis of said scrap ejector and the second side wall is disposed at an angle of not more than 90°

with respect to the longitudinal axis of said scrap ejector such that the lugs bend in the longitudinal direction when subjected to a compressive force.