Stock material or miscellaneous articles – Composite – Of metal
Patent
1988-09-21
1990-08-28
Page, Thurman K.
Stock material or miscellaneous articles
Composite
Of metal
4274071, 427409, 428469, B32B 1508, B05D 302
Patent
active
049524615
ABSTRACT:
Composite-coated flat-rolled steel can stock processing and product for fabrication of drawn one-piece cup-shaped work product or can end walls. Single or double-reduced flat-rolled steel, after cleaning, is chemically treated to apply a chrome oxide coating of about three hundred (300) to five hundred (500) micrograms per square foot to each substrate surface followed by utilization of a dual-organic coating system with application and curing of an organic primer to each chemically-treated surface of the substrate followed by application and curing of an added organic coating on at least one such substrate surface; such composite-coating process resulting in an exterior surface of a drawn can body or end wall having at least about two and one-half (2.5) to about five (5) milligrams of organic coating per square inch and an interior can surface with organic coating weight of at least about seven and one-half (7.5) to ten (10) milligrams per square inch. In cup forming applications, both such surfaces are lubricated with a suitable lubricant approved for food and beverage usage prior to cupping and any redraw operation.
REFERENCES:
patent: 3061459 (1962-10-01), Bader
patent: 3353986 (1967-11-01), Mathias et al.
patent: 3679513 (1972-07-01), Addinall et al.
patent: 4125670 (1978-11-01), Perfetti et al.
patent: 4330587 (1982-05-01), Woodbrey
patent: 4339483 (1982-07-01), Ueno et al.
Livingston Warren D.
Saunders William T.
Baker Raymond N.
Page Thurman K.
Weirton Steel Company
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