Crown cork closure

Clinch-on applies a simultaneous bending action over the total circumference of a skirt. Crimped-on applies both flutes and a bending action in the case of closures—the prime example is a crown cork closure invented by W.Painter of Baltimore in 1882. The word crimped is frequently misused when clinched is correct. Rolled-on and spun-on use wheels to bend in a... 

Similar comments apply to crown cork adhesives. These are used in crown cork closures to secure the thin layer of cork to the waxed paper in contact with the liquid or the metal cap. Formulation XI is typical of the material... 

The crown closure machine (crowner or capper are alternative names) is placed close to the filler. It is charged with crown corks and these closures are delivered one by one from a slide. The bottle is raised to the crown cork and pressure is applied to the top of the crown in order to seal the liner to the bottle, then the crimped edges of the closure are pressed tightly over the top of the bottle. In many cases the crowns are jetted with a blast of air to remove foreign matter from inside the closure, especially chips of lacquer and cork dust in the case of closures with cork seals. The crown is made of steel, coated with resin or enamel, and the seal embedded in it is either cork or plastic. In some cases the cork is partly covered by a plastic or aluminium disc. 

Caps, Corks, and Wire Hoods. Crown caps are used for closures on bottles before secondary fermentation. The caps are 26 mm in diameter (one company uses 29 mm) and are coated tinplate or stainless steel. Two companies use stainless steel to prevent corrosion and leakage during storage under moist and cold conditions, or for long aging under high pressure. The liners of the caps are ground cork with vinyl disks or elastomer plastic. Cork and plastic liners appear to work equally well. 

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