Patent ID: 8636944
Filing Date: 2014-01-28
Classification: B29C,B29K

Abstract:
1. A method of making a plastic container having a deep inset base comprising steps of: molding a plastic preform into an intermediate plastic container blank having a container bottom comprising a standing ring and a base projection portion formed beneath standing ring with the container blank in an upright position, the base projection portion having a lowermost end wider than an opposite end thereof, said opposite end being proximate to said standing ring, so that a substantially straight sidewall of the base projection portion is angled outwardly toward said lowermost end with respect to a longitudinal axis of the container blank, wherein a maximum diameter of the base projection portion is within a range of about 80% to about 110% of a maximum diameter of a remainder of the container blank; and relatively displacing the base projection portion upwardly with respect to the standing ring so as to convert the base projection portion into a central push-up area positioned inside the container bottom, the substantially straight sidewall of the base projection portion thereby forming an upstanding container bottom sidewall portion having an angle of about 0° with respect to said longitudinal axis.