Air passage device for inflatable shoe bladders

An article of footwear comprising:

• an upper;
• a sole attached to said upper;
• and
• an inflatable bladder introduced into at least one of said upper and said sole;
• wherein said inflatable bladder includes a first sheet of a fluid-impervious material and a second sheet of fluid-impervious material, wherein said first sheet and said second sheet are sealed and wherein at least a portion of said first sheet has an embossed interior surface.

A method of manufacturing an inflatable bladder for an article of footwear, comprising:

• providing a first fluid-impervious sheet and a second fluid-impervious sheet, wherein at least a portion of said first sheet includes a first embossed interior surface;
• positioning said first embossed surface interior surface adjacent to and facing a second interior surface of said second sheet;
• and
• sealing said first and second sheets together to form an inflatable bladder.

An inflatable bladder for use in an article of footwear comprising:

• a first sheet of a fluid-impervious material;
• a second sheet of a fluid-impervious material, wherein said first sheet and said second sheet are sealed;
• and
• at least one narrow channel between said first and second sheets, wherein at least a portion of an interior surface of said first sheet along said narrow channel is embossed.