Today in 1933, US Patent 1899784 A was issued, an invention of Albin H. Warth, assigned to the Crown Cork & Seal Co., for his “Bottle Cap.” This crown was patented shortly before the repeal of Prohibition, which took place several months later, in December, although by April some lower-strength beer became available. There’s no Abstract, but the description provides some insight in the why it was a more modern crown.

This invention relates to bottle caps and more particularly to a cap consisting of ametallic’shell containing a cushion disc having what is known as a protecting facing. In its preferred form, the invention relates to that type of cap having a protecting facing in the form of a center-disc or center-spot which is of smaller diameter than the cushion disc.

In closures of this character, the cushion or compressible disc is ordinarily formed of sheet cork or of a composition of granular cork, the particles of which are united by a binder which is resistant to gas and acids.

It is desirable to protect the cushion disc from the contents of the bottle, since the cork or other material of the disc becomes discolored and imparts an undesirable flavor or taint to the contents.

The facing discs have ordinarily been fornied either of metal foil, such as aluminum or tin, or of fibrous material, such as paper.

The present invention relates to the latter type in which the facing is of paper.