Patent ID: 6790168
Filing Date: 2004-09-14
Classification: B29C,B29K,B29L,B31B

Abstract:
In cup making equipment for making a first cup having one volume and a second cup of a volume lesser than the first cup, both the first cup and the second cup having a sidewall with a top edge and a bottom wall extending generally transversely to the sidewall, the improvement wherein:the cup making equipment is constructed and arranged to remove only a central portion of the bottom wall in the first cup to define a bottom wall annular border extending radially inwardly from the sidewall of the first cup; and the cup making equipment is constructed and arranged to flatten the top edge of the second cup, align the first cup above the second cup such that the flattened top edge of the second cup is in horizontal overlapping relationship with the bottom wall annular border of the first cup, and seal the pre-flattened top edge to the bottom wall annular border to join the first cup and the second cup into a single two stage cup having an insulated air gap between a lower portion of the first cup and an upper portion of the second cup.