"ctional views of their respective cut edges; Figures 3a and 3b are a sectional view and an enlarged detailed partial sectional view of a scored cup; Figures 4a, 4b, 4c, and 4d are a sectional view of a parted end-piece, a sectional view of a parted ring and enlarged detailed partial sectional views of their respective parted edges; Figures 5a and 5b are perspective and side views of a manually ope" . . . .