Patent ID: 6177163
Filing Date: 2001-01-23
Classification: G09F,Y10S,Y10T

Abstract:
An adhesive sheet assembly comprising:a continuous carrier of flexible sheet material in roll form, the carrier having two substantially parallel side edges extending in a longitudinal direction of the carrier;a series of longitudinally spaced adhesive sheets on the carrier, each adhesive sheet having a front side facing away from the carrier capable of receiving markings, a back side facing toward the carrier substantially covered with a pressure sensitive adhesive, the back side having a first portion and a second portion;a continuous cut in the carrier defining, for each adhesive sheet, one cover piece cut from the carrier such that the cover piece has an outer peripheral edge within the first portion on the backside of the adhesive sheet, so that the cover piece may be separated from the carrier and retained on the first portion of the backside of the adhesive sheet without extending beyond the outer peripheral edge of the adhesive sheet when the adhesive sheet is peeled off the carrier due to adhesion between the cover piece and the adhesive sheet,whereinat least 40 percent of the total length of the outer peripheral edge of each cover piece is substantially in registration with the outer peripheral edge of the adhesive sheet to which it is adhered;the continuous cut does not extend through the substantially parallel side edges of the continuous carrier; andeach longitudinally spaced adhesive sheet on the carrier is not perforated or cut parallel to the outer peripheral edge of the cover piece adhered to that adhesive sheet; oreach adhesive sheet comprises a flexible polymer film, polymer-reinforced sheet or cloth having a Taber stiffness of not less than 0.03 measured according to ASTM D747 A;the pressure sensitive adhesive has an initial tack value of at least 200 g measured according to ASTM D2979 on a Polyken.TM. probe tack tester, an adhesive tack sufficient to prevent conformability failure of the adhesive sheet after 10 hours conformability testing, and an adhesive strength of at least 100 N/m according to ASTM D1000; andeach adhesive sheet is capable of being removed from a substrate to which it is adhered without leaving a substantial amount of residue on the substrate.