The term bellows is used by extension for a flexible bag whose volume can be changed by compression or expansion, but not used to deliver air. For example, the light-tight (but not airtight) bag allowing the distance between the lens and film of a folding photographic camera to be varied is called a bellows.
What NFL has lost the Super Bowl the most? The Buffalo Bills, the Denver Broncos, the Minnesota Vikings, and the New England Patriots have all lost four Super Bowls. Edit
Thirteen other NFL franchises have won at least one Super Bowl. Nine teams have appeared in Super Bowl games without a win. The Minnesota Vikings were the first team to have appeared a record four times without a win. The Buffalo Bills played in a record four Super Bowls in a row, and lost every one.