Footed container and base therefor

Details Footed container and base therefor Footed container and base therefor

B - Operations, Transporting

65

D

B65D 1/02 (2006.01)

Patent

CA 2336991

A molded polymeric container that is shaped to exhibit superior characteristics of light weighting, stability against toppling and resistance to stress cracking includes a conventional cylindrical body portion having a longitudinal axis and a circumferential sidewall and a novel bottom portion. The bottom portion includes a central pushup area of uniformity that is substantially uniform within a spatial rotation about the longitudinal axis. The area of uniformity has a radius RG. The bottom also includes a plurality of support feet that surround and protrude downwardly from the pushup area. Each of the support feet has a bottom support surface with an inner point of contact and an outer point of contact. The outer points of contact together define an outer contact radius ROC. The bottom portion as a whole has a radius of maximum width RBASE. A plurality of ribs are positioned in valleys between the support feet. Each of these ribs is positioned between and helps define two of the support feet. At least one of the ribs has a localized radius of curvature RC that intersects an arc connecting inner points of contact of two adjacent support feet. Advantageously, the radius of uniformity is within the range of about 16 % to about 26 % of ROC; and RC is within the range of about 70 % to about 110 % of RBASE.

L'invention concerne un récipient polymère moulé configuré pour présenter des caractéristiques supérieures de légèreté, de stabilité contre le basculement et de résistance aux fissures de contrainte. Ledit récipient comprend un corps cylindrique classique comportant un axe longitudinal, une paroi latérale circonférentielle et une nouvelle partie fond. La partie fond comporte une zone centrale enfoncée sensiblement uniforme sur une rotation spatiale autour de l'axe longitudinal. Cette aire d'uniformité a un rayon R¿G?. Le fond comporte également une pluralité de pieds de support entourant la zone enfoncée et faisant saillie vers le bas. Chacun des pieds de support comporte une surface dotée d'un point intérieur de contact et d'un point extérieur de contact. Les points extérieurs de contact définissent ensemble un rayon extérieur de contact R¿OC?. La partie fond dans son ensemble a un rayon de largeur maximum R¿BASE?. Une pluralité de nervures sont positionnées dans les creux entre les pieds de support. Chacune de ces nervures est positionnée entre deux pieds de support, et aide à définir deux des pieds de support. Une des nervures au moins a un rayon localisé de courbure R¿C? faisant intersection avec un arc reliant les points intérieurs de contact de deux pieds de support adjacents. De manière avantageuse, le rayon d'uniformité est compris entre 16 % environ et 26 % environ de R¿OC ?; et R¿C? est compris entre 70 % environ et 110 % environ de R¿BASE?.

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