초록 ▼

This invention is a paperboard container comprising a bottom wall, an upwardly extending side wall, a first curved portion joining the side wall to the periphery of the bottom wall, an outwardly extending rim, a second curved portion joining the rim to the periphery of the side wall, and a downwardl

This invention is a paperboard container comprising a bottom wall, an upwardly extending side wall, a first curved portion joining the side wall to the periphery of the bottom wall, an outwardly extending rim, a second curved portion joining the rim to the periphery of the side wall, and a downwardly curved lip outwardly extending from the periphery of the rim. The container is integrally formed from a substantially homogeneous paperboard blank by a press such that the thickness of the side wall, second curved portion and rim is less than that of the bottom wall, first curved portion and lip. The container includes a plurality of densified regions radially extending through and circumferentially spaced about annular sections of the side wall, second curved portion and rim. The densified regions are formed from pleats including at least three layers of paperboard created during press forming of the blank which are subjected to sufficient pressure to reform the pleats into cohesive, fibrous structures having a density substantially greater than and a thickness substantially equal to adjacent areas of the side wall, second curved portion and rim.

대표청구항 ▼

A paperboard container, comprising: (a) a bottom wall, an upwardly extending side wall, a first curved portion joining said side wall to the periphery of said bottom wall, an outwardly extending rim, and a second curved portion joining said rim to the periphery of said side wall; (b) said container

A paperboard container, comprising: (a) a bottom wall, an upwardly extending side wall, a first curved portion joining said side wall to the periphery of said bottom wall, an outwardly extending rim, and a second curved portion joining said rim to the periphery of said side wall; (b) said container being integrally formed from a substantially homogeneous paperboard blank by a press such that the thickness of said side wall, second curved portion and rim is less than that of said bottom wall and first curved portion; and (c) a plurality of densified regions radially extending through and circumferentially spaced about annular sections of said side wall, second curved portion and rim, said densified regions being formed from pleats including at least three layers of said paperboard reformed into substantially integrated, fibrous structures being generally inseparable into their constituent layers and having a density substantially greater than and a thickness substantially equal to circumferentially adjacent areas of the side wall, second curved portion and rim.