Patent ID: 10076136

Abstract:
A wrapper (510) for a smoking article comprises a sheet material extending in a first direction (24) in which the wrapper (510) is wrapped around a smoking article and a second direction (20) perpendicular to the first direction (24). The wrapper further comprises a window (512) in the sheet material, the window (512) having a perimeter wherein the perimeter comprises a first portion (518) that defines a projection (516) of the sheet material into the window (512). The projection (516) is delimited by the first portion (518) of the perimeter and a straight line (520) forming a tangent to each end (522, 524) of the first portion (518) of the perimeter, and the distance between the straight line (520) and the point on the first portion (518) of the perimeter furthest from the straight line (520) in a direction perpendicular to the straight line (520) is less than 1 millimeter.