Patent ID: 6777055
Filing Date: 2004-08-17
Classification: B32B,Y10T

Abstract:
An article comprising:a stack of sheets, each sheet having a first side surface, an opposite second side surface, and a side edge, and wherein each sheet independently comprises: (a) a film, the film having a first side having a surface area, an opposite second side surface having a surface area; (b) a bonding layer having a first side having a surface area and an opposite second side having a surface area, wherein the bonding layer is bonded via its first side to the second side of the film such that at least a center of the surface area of the second side of the film is in contact with the bonding layer, wherein at least about 50 percent of the surface area of the second side of the film has the bonding layer bonded thereto; wherein each sheet is stacked upon another sheet such that except for a bottom sheet of the stack of sheets, the bonding layer of a sheet is in contact with the film of a sheet below; wherein at least a portion of the side edges of the sheets are disposed in a vertically staggered arrangement relative to one another thereby forming a vertically staggered side edge having a staircase or reverse staircase configuration, wherein the vertically staggered side edge includes at least one indexing surface; and wherein the bonding layer of each sheet extends to the vertically staggered side edge; wherein a topmost sheet can be removed from the stack of sheets by pulling it away from the stack such that the sheet being removed from the stack as well as the sheets remaining with the stack do not delaminate; wherein the stack of sheets when subjected to a visual acuity test using a 3 meter Snellen eye chart allows an observer with 6 meter/6 meter vision to read a line on the eye chart which is indicative of about 6 meter/9 meter vision or better.