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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.

Patent No.:

US 9623473 B1

PDFFull Text
Date of Patent:
Apr. 18, 2017

Filed:

Oct. 02, 2012

Method for producing a ring-pull top from a steel sheet provided with a protective layer and a ring-pull top produced thereby

Applicant:

Thyssenkrupp Rasselstein Gmbh, Andernach, DE;

Inventors:

Karl Ernst Friedrich, Moers, DE;

Dirk Matusch, Neuwied, DE;

Burkhard Kaup, Andernach, DE;

Reiner Sauer, Neuwied, DE;

Assignee:

THYSSENKRUPP RASSELSTEIN GMBH, Andernach, DE;

Attorneys:

Paul D. Bianco

Katharine Davis

Fleit Gibbons Gutman Bongini & Bianco PL

Primary Examiner:

Edward Tolan

Int. Cl.
CPC ...
C21D 1/26 (2006.01); B21D 51/38 (2006.01); C21D 9/00 (2006.01); C21D 1/42 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); B65D 17/00 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); B21D 51/44 (2006.01); C21D 9/46 (2006.01);
U.S. Cl.
CPC ...
B21D 51/383 (2013.01); B65D 17/163 (2013.01); C21D 1/18 (2013.01); C21D 1/26 (2013.01); C21D 1/42 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/0068 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); B21D 51/443 (2013.01); C21D 9/46 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); Y02P 10/253 (2015.11);
Abstract

The invention relates to the use of a steel sheet provided with a protective layer for producing a ring-pull top or a can having a ring-pull top, where the steel sheet is made of an unalloyed or low-alloy steel having a carbon content of less than 0.1% by weight, and also an associated process. The problem proceeding from known steel sheets having a protective layer, namely to provide a steel sheet by means of which ring-pull tops which for a constant residual wall thickness of the notch line have a lower tear-off force can be produced by means of the ring-pull top, is solved by the steel sheet being recrystallizingly heat treated at a heating rate of more than 75 K/s and after the recrystallizing heat treatment cooled at a cooling rate of at least 100 K/s and then coated with the protective layer.

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