Patent ID: 6835012
Filing Date: 2004-12-28
Classification: B41J

Abstract:
An ink ribbon cassette comprising a supply core, a web disposed on said supply core, a storage core, means for passing said web from said supply core to said storage core, means for increasing the tension on said web as it passes from said supply core to said storage core to produce a tensioned web, a drive roller contiguous with said tensioned web, and a nip roller contiguous with said tensioned web, wherein:(a) said tensioned web is passed in a first rotary direction around a portion of said drive roller, and said tensioned web is passed in a direction around a portion of said nip roller, wherein said first rotary direction is opposite to said second rotary direction; and (b) said tensioned web is passed in said first rotary direction around a portion of said storage core, wherein said drive roller, said tensioned web, and said nip roller form a nip that compresses the diameter of at least one of said drive roller and nip roller by at least about 0.001 percent, wherein said means for increasing the tension on said web as it passes from said supply core to said storage core is comprised of a first stationary brake, wherein said means for increasing the tension on said web as it passes from said supply core to said storage core is comprised of a second stationary brake, wherein said means for increasing the tension on said web as it passes from said supply core to said storage core is comprised of a guide roller, wherein each of said first stationary brake and said second stationary brake has a cylindrical shape, wherein each of said first stationary brake and said second stationary brake has a diameter of at least about 0.25 inches, wherein each of said first stationary brake and said second stationary brake have a coefficient of friction when in contact with said web of from about 0.2 to about 0.6, wherein the angle of wrap of said web around said first stationary brake and said second stationary brake is from about 180 to about 360 degrees.