Title: Manufacturing methods for selective coating characteristic tinplated steel cans

Abstract: By predetermined selection of tin coating weight in the manufacture of electrolytically tinplated continuous steel strip, cup formation of sheet metal blanks cut from such tinplated flat rolled steel with the selected tin coating weight disposed internally, selective reduction of sidewall gage and coating weight, maintenance of tin coating weight on the interior surface of the bottom wall, and selective organic coating, the present invention enables production of special container packs, previously limited to three-piece containers, from unitary seamless can bodies. Selected tin coating weight on the interior surface of the bottom wall of the can body is maintained throughout the manufacturing process and this surface is exposed to container contents. The sidewall interior surface of the can body is protected from exposure to container contents by an organic coating.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Saunders, William T. (Weirton, WV, US)

Application Number: 387043
Filing Date: 1973-08-09
Publication_date: 1976-01-27
Assignee: National Steel Corporation (Pittsburgh, PA)
Primary Class(es): 72/47 220/62.11
Other Classes:
US Patent Ref:

2881516	Apr, 1959	Hull et al.	113/120.
3040781	Jun, 1962	Reymann et al.	113/120.
3268344	Aug, 1966	Kamm	220/64.
3360157	Dec, 1967	Bolt et al.	113/120.
3760751	Sep, 1973	Dunn et al.	113/120.

Other Refs:
Primary Examiner: Lanham, C. W.
Assistant Examiner: Rogers, Robert M.
Attorney: Shanley, O'Neil and Baker