Structure of Metal Containers

A

Dome Cover : A type of cover characterized by a flat horizontal surface ( top ) that tapers smoothly onto the skirt.( Vertical Surface )
Slip Cover : Cover/Closure style in which the covers skirt ( vertical surface slips over and to the outside of the can body ).

B

Skirt : The vertical surface between the edge of the top of the slip cover and the curl at the bottom of the slip cover.

C

Curl : An area of tin turned in on itself to provide a safe, finished curved edge.

D

Exterior Bead
Bead : Concave ( interior bead ) or convex ( exterior bead ) area usually 1/8" wide spanning the circumference of the tin to provide additional strength and stability to the tin body.

E

Embossed : Type of slipcover in which a "step" is created between the horizontal surface and vertical surface of the cover so that stacking tins is possible with less likelihood of toppling over.

F

Debossed : Type of slipcover which has a depression between the horizontal surface of the cover.

G

Plug : The top that fits into the walls of the friction ring.

H

Multiple Friction Ring :
Multiple Friction : A plug closure fits into a "well" of a seamed on ring. The plug is pressed into the ring and the two surfaces ( the outside and inside edge ) come into contact with the ring, creating multiple sealing surfaces on the plug/ring combination.