Abstract: In the manufacture of drawn and ironed, unitary, can bodies, structure and method which interrupt surface contact between an ironing mandrel and the interior sidewall of a can body being ironed to reduce friction for removal of the ironed can body from the mandrel.During passage through an ironing ring, sidewall metal is moved into a narrow-width, linearly-extended indentation in the mandrel sidewall. The metal of the protrusion thus formed on the interior surface of the can body is moved along the mandrel sidewall during passage through a subsequent ironing ring, with such movement breaking surface adhesion between the mandrel sidewall and the interior surface of the container body sidewall to facilitate removal.

Abstract: Humidifying composition is introduced into a portable gas sterilizer in droplet form. The composition is packaged in an aerosol can and comprises water, preferably water and organic solvent. Automatic controls effect a predetermined relative humidity in the sterilizer before initiating sterilizing gas introduction.

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.