Title: Container including an aluminum panel having a portion removable by tearing

Abstract: An improved container featuring an aluminum end or panel having a tear open portion defined by score lines provided in an aluminum composite having a core composed of an aluminum alloy consisting essentially of 1 to 7% of one or more elements selected of the group of up to 3% copper, up to 4% magnesium and up to 1.5% manganese, the balance essentially aluminum and an aluminum cladding layer consisting of aluminum and, optionally, some amount of zinc but less than 1% with the cladding facing the contents of the container. The solution potential of the core and cladding are controlled in order to achieve the desired protection. A thermal treatment can be employed to control the electrochemical performance of certain composites.

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Inventors: Anderson, William Albert (Pittsburgh, PA, US)
McKee, Arvil Burke (Lower Burrell, PA, US)
McBride, John Knox (New Kensington, PA, US)

Application Number: 591700
Filing Date: 1975-06-30
Publication_date: 1976-06-15
Assignee: Aluminum Company of America (Pittsburgh, PA)
Primary Class(es): 220/626 220/62.17, 220/270, 426/131, 426/398, 428/34.1, 428/43, 428/571, 428/654
Other Classes:
US Patent Ref:

3502448	Mar, 1970	Anderson et al.	75/147.
3857973	Dec, 1974	McKee	29/197.

Other Refs: 816,182

Jul, 1959	UK

Primary Examiner: Steiner, Arthur J.
Assistant Examiner:
Attorney: Lippert; Carl R.