The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Feb. 22, 2000

Filed:

Aug. 28, 1998
Applicant:
Inventor:

Thomas L Miller, Hampshire, IL (US);

Assignee:

Other;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ; B21C / ;
U.S. Cl.
CPC ...
72467 ; 72282 ; 72 41 ;
Abstract

The inventive pressure die holder is comprised of an elongate hollow steel cylinder which receives a series of dies in an interior cavity. The dies are maintained within the cavity by means of a cap which is attached to one end of the pressure die holder. The inventive pressure die holder is provided with two sets of vents which relieve lubricant pressure within the pressure die holder. The first set of vents are located in mid portion of the body of the pressure die holder in alignment with the dies. The first set of vents reduce pressure between the die pair, allowing the lubricant to flow through the die at a cooler temperature. The second set of vents are located in the body of the pressure die holder adjacent the cap, and allow the cap to be removed from the pressure die holder at the end of the drawing operation.


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