Patent · US Active

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

US9623473B2 · kind B2 · utility

3Cited by

11References

7Claims

0Family size

Assignee

thyssenkrupp Rasselstein GmbH · DE

Inventors

Karl Ernst Friedrich · Moers, DE
Dirk Matusch · Neuwied, DE
Burkhard Kaup · Andernach, DE
Reiner Sauer · Neuwied, DE

Key dates

Filing date	Oct 2, 2012
Grant date	Apr 18, 2017
Priority date	—
Expiry date	Apr 3, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/25
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.