Envelopes – wrappers – and paperboard boxes – Paperboard box – Box material includes a coating or a nonpaperboard...
Patent
1985-09-20
1986-08-19
Moy, Joseph Man-Fu
Envelopes, wrappers, and paperboard boxes
Paperboard box
Box material includes a coating or a nonpaperboard...
229 58, B65D 100
Patent
active
046064966
ABSTRACT:
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.
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Grans Denny R.
Marx Ronald P.
Wnek Patrick H.
James River Corporation of Virginia
Man-Fu Moy Joseph
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