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
as of 2011 the buffalo bills were tied with the minnesota vikings as the team with the most super bowl appearances without a win 4 they appeared in 4 consecutive super bowls xxv to xxviii from 1991 to 1994