Apparatus for ejecting cut corrugated board from a cutting die

• US 5,881,620 A
• Filed: 10/16/1996
• Issued: 03/16/1999
• Est. Priority Date: 10/07/1993
• Status: Expired due to Term

• Current Assignee: Container Graphics Corporation
• Original Assignee: Container Graphics Corporation
• Inventors: Geer, Jeffrey, Smithwick, James M. Jr., Simpson, Jack R.
• Primary Examiner(s): Dexter, Clark F.
• Application Number:
  US08/733,030
• Time in Patent Office: 881 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

An elongated rubber ejector is mounted to a die board that forms a part of a cutting die and the ejector functions to engage cut corrugated board and eject the same from the cutting die. The rubber ejector includes upper and lower faces or surfaces with each face including a series of spaced apart raised lugs with a series of spaced apart voids or relief areas disposed between the lugs. Lugs and relief areas formed on one face are staggered with respect to the lugs and relief areas formed on the other face. In practice, the lugs are compressed during a die cutting operation. Once the corrugated board has been cut and the die board and an opposed anvil have been moved apart, the lugs and the ejector expand and in the process the rubber ejector engages the cut corrugated board and ejects the same from the cutting die.

Claims

1. A cutting die for cutting and ejecting corrugated board comprising;

(a) a die board;

(b) a cutting rule supported by the die board and extending outwardly from the surface thereof; and

(c) an ejector supported on the die board for ejecting cut corrugated board from the die board;

(d) the ejector being vertically oriented on the die board and including an upper surface for engaging the corrugated board and a lower surface disposed below the upper surface and supported on the die board;

(e) wherein the upper and lower surfaces includes a series of space apart lugs and a series of space apart relief areas for permitting one or more of the lugs to move towards one or more of the relief areas and causing the one or more relief areas to be at least partially filled in response to the ejector being compressed between the die board and the corrugated board;

(f) wherein the lugs and relief areas of the upper surface are staggered with respect to the lugs and relief areas of the lower surface; and

(g) wherein the ejector further includes a pair of sides with one side including a series of spaced apart protrusions that extend outwardly from the ejector.

2. The cutting die of claim 1 wherein the ejector is formed of rubber.

3. The cutting die of claim 2 wherein the durometer of the rubber ejector is in the range of approximately 60 to 78.

4. The cutting die of claim 3 wherein the density of the rubber ejector is in the range of approximately 10 to 30 lbs. per cubic foot.