Patent ID: 6364153
Filing Date: 2002-04-02
Classification: B65F,Y10S

Abstract:
A container comprising a plurality of walls arranged so as to enclose and define a volume wherein at least one of said walls comprises a top wall including at least two edges having a plurality of rollers mounted on each of said at least two edges;at least two guide tracks spaced apart from one another and each movably mounted on one of said plurality of walls wherein said guide tracks are positioned within a collar comprising an open-ended channel-shaped structure including an upper sidewall, a lower sidewall, and a web, wherein each of said guide tracks is mounted on an inside surface of said lower sidewall, and said collar is oriented so that said guide track is accessible to said plurality of rollers so that said rollers may be placed in rolling engagement with said guide track when positioned between said collar and said top wall, and wherein each of said plurality of rollers matingly engages a portion of one of said guide tracks so that said guide tracks cooperate with said rollers so as to move said top wall perpendicularly and away from said volume between a closed and substantially sealed position and a closed and substantially unsealed position, and wherein said top wall is free to open and form an entrance into said volume from said closed and substantially unsealed position.