Patent ID: 8317026

Claim:
A packaging blank comprising: a first panel including a blister aperture; and a second panel having a facing surface and including an inner ring and an outer ring, the inner ring being positioned with the outer ring in a substantially concentric arrangement, the inner and outer rings both being formed at least in the facing surface of the second panel such that the inner and outer rings are visible at least from the facing surface of the second panel, wherein: said inner ring is comprised of a series of perforations and said outer ring is comprised of a series of perforations in which the perforations of said inner ring are staggered from the perforations of said outer ring such that each of at least some of the perforations of said inner ring is radially aligned with a space between two adjacent perforations of the outer ring as viewed at least from the facing surface of the second panel; and the blister aperture and the inner ring are aligned when the facing surface of the second panel is secured to the first panel.