Stripper plate supporting assembly

• US 6,755,104 B2
• Filed: 07/01/2002
• Issued: 06/29/2004
• Est. Priority Date: 07/01/2002
• Status: Expired due to Fees

• Current Assignee: David S. Grant
• Original Assignee: David S. Grant
• Inventors: Grant, David S.
• Primary Examiner(s): Choi, Stephen
• Application Number:
  US10/186,510
• Publication Number:
  US 20040000223A1
• Time in Patent Office: 729 Days
• Field of Search: 836/981.1, 836/983.1, 831/28, 831/40, 831/43, 836/84, 411/140, 411/997, 411/962, 411/115
• US Class Current: 83/140
• CPC Class Codes: B21D 45/006 Stripping-off devices
• CPC Class Codes: B26D 7/025 acting upon planar surfaces B26D7/04 takes precedence
• CPC Class Codes: B26D 7/1818 by pushing out
• CPC Class Codes: Y10T 83/2159 By spring means
• CPC Class Codes: Y10T 83/9423 Punching tool
• CPC Class Codes: Y10T 83/9461 Resiliently biased connection

Abstract

A stripper plate supporting assembly has a stripper spool unit including a stripper spool and retaining screw for supporting the stripper plate in a die press in a manner that the stripper plate may be removed from a die set without removing the die set from the press. The stripper spool has a shank with at least one spring biased pin in its flat end. At least one opening or socket is provided in the stripper plate for receiving the pin and preventing the stripper spool from turning with the retaining screw.

Claims

1. A stripper plate supporting assembly for a die press comprising:

a stripper spool having a shank, a head and a flat end remote from said head, a drilled and tapped longitudinal hole extending inwardly from said flat end, a closed-ended bore in the flat end spaced from the drilled and tapped hole, a pin received in said bore is spring biased to normally project a free end of the pin beyond the flat end,

a die set with a bore having a diameter for close sliding fit with said stripper spool shank and a shoulder for limiting the length of relative travel between said stripper plate and said die set,

a stripper plate with a bore in axial alignment with said drilled and tapped hole in said stripper spool, a closed ended opening or socket spaced from the bore for seated receipt of the free end of the pin in a clockwise and counterclockwise direction,

a retaining screw extending through said stripper plate bore and threading into said drilled and tapped hole, said retaining screw coacting with said stripper spool to hold and support said stripper plate in position against said flat end of the stripper spool, said free end of the pin received in the opening or socket in the stripper plate preventing the stripper spool from turning clockwise or counterclockwise with the retaining screw.

2. The assembly of claim 1 wherein the die set comprises an upper die shoe and a lower shoe and the stripper plate is supported from and spring biased away from one of said die shoes.

3. The assembly of claim 2 wherein the stripper plate is supported from and spring biased away from the upper die shoe.

4. The assembly of claim 2 wherein the spring for biasing the pin and the spring for biasing the stripper plate are coil springs.

5. A stripper plate supporting assembly comprising:

a stripper spool having a shank, a head and a flat end remote from said head, a drilled and tapped longitudinal hole extending inwardly from said flat end, a closed-ended longitudinal bore in the flat end spaced from the drilled and tapped hole, a pin received in said bore is spring biased to normally project a free end of the pin beyond the flat end,

a die set with a bore having a diameter for close sliding fit with said stripper spool shank and a counterbore in said die set remote from said stripper plate and having a diameter for close sliding fit with said spool head and a depth greater than the axial length of said spool head by the length of relative travel between said stripper plate and said die set,

a stripper plate with a bore in axial alignment with said drilled and tapped hole in said shank, a closed ended opening or socket spaced from the bore for seated receipt of the free end of the pin in a clockwise or counterclockwise direction,

a retaining screw extending through said stripper plate bore and threading into said drilled and tapped hole in the stripper spool, said retaining screw coacting with said stripper spool to hold and support said stripper plate in position against said flat end of the stripper spool, said free end of the pin received in the opening or socket in the stripper plate preventing the stripper spool from turning clockwise or counterclockwise with the retaining screw.

6. The assembly of claim 5 wherein the die set comprises an upper die shoe and a lower shoe and the stripper plate is supported from and spring biased away from one of said die shoes.

7. The assembly of claim 6 wherein the stripper plate is supported from and spring biased away from the upper die shoe.

8. The assembly of claim 6 wherein the spring for biasing the pin and the spring for biasing the stripper plate are coil springs.