BOTTOM FINISHING STATION COMPONENTS FOR A CUP MAKING MACHINE

摘要

A cup making machine (20) has a bottom finishing station (40) provided with a mandrel (28) for holding a sidewall blank (60) and a bottom blank (62) such that a flap portion (66) of the sidewall blank (60) is folded around a lip (64) of the bottom blank. The bottom finishing station has a seam clamp (76) engageable with overlapped edges of the sidewall blank to form a side seam, and a clamp ring (86) selectively movable into engagement with the seam clamp. The clamp ring includes an annular wall (88) forming a recess for receiving a rotatable tool (90) which presses against the flap portion and the lip to form a bottom seal. Part of the seam clamp protrudes into the clamp ring, and part of the clamp ring protrudes into the seam clamp to form a bridge acting against the overlapped side seam at the top of the lip.