Lid for cups with non-helical brim

US6056145A · kind A · utility

Assignee

• Fort James Corporation · US

Inventors

• Jonathan E. Rush · Phillipsburg, US
• Bruce R. Smith · Lake Jackson, US
• Thomas R. Toczek · Nazareth, US
• Daniel J. Geddes · Appleton, US
• Warren Giles Wiedmeyer · Pleasant Prairie, US

Key dates

• Filing date: Jan 14, 1999
• Grant date: May 2, 2000
• Expiry date: Jan 14, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D2543/00805
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A lid for use on a cup having a radially outwardly projecting non-helical brim extending around a mouth thereof. The lid is formed of plastic and comprises a center portion, and a flexible skirt extending downwardly from an outer periphery of the center portion. The skirt includes a radially inwardly projecting annular restriction ring adapted to be positioned beneath the cup brim. The skirt includes a plurality of threads spaced apart circumferentially around the skirt. Each thread extends generally helically upwardly from a location disposed between the restriction ring and a bottom edge of the skirt. The threads intersect the restriction ring to form circumferentially spaced caesurae in the restriction ring.