Patent ID: 7395928

Claim:
A child-resistant blister pack defining a plurality of unit package regions wherein each region encloses one unit dosage form, said pack comprising: a blister film sheet having unit package regions, wherein each unit package region consist of a cavity and a flange surrounding said cavity, each cavity being adapted to receive a unit dosage form, and a lidding sheet sealed to said flanges of the blister film sheet for enclosing a unit dosage form within each unit package region; said sealed blister sheet and lidding sheet having a first set of lines of weakness extending from side to side of the blister pack, a second set of lines of weakness extending from side to side of the blister pack running transversely in two directions and intersecting with the first lines of weakness, wherein said first and second set of lines of weakness define the inner borders of each unit package region; said sealed blister sheet and lidding sheet having a third set of lines of weakness at the internal corner area of each unit package region, defining a triangular unsealed area along each of said line of weakness wherein the container sheet and enclosure sheet overlap but are not sealed together, and a sealed area along each of said line of weakness wherein the container sheet and enclosure sheet are sealed together at the internal corner of each unit package region; whereby, after an individual unit package region is separated, an unsealed area between the blister sheet and lidding sheet is exposed when the third line of weakness is bent, to form a pull tab to detach the lidding sheet.