The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1990
Filed:
Jul. 15, 1988
Thomas F Powers, Ypsilanti, MI (US);
William G Kinslow, Saline, MI (US);
Hoover Universal, Inc., Ann Arbor, MI (US);
Abstract
An improved preform is disclosed for molding plastic containers having a self-supporting base structure. The preform has a reinforcing section of concentric annular ribs near its closed end. The wall thickness of the preform is increased in the reinforcing section by a plurality having an increasing thickness in a direction toward the closed end of the preform. When blow molded into a final container, these concentric ribs form annular reinforcing ribs on the inner surface of the container base. These ribs are substantially concentric about the longitudinal axis of the container and are of decreasing thickness radially outward from the center. The ribs coact with other reinforcing ribs in the base structure to further increase the strength of the container base. During stretching of the preform prior to blow molding, the concentric ribs act to reduce the stretching of the preform in the reinforcing section thus increasing the wall thickness of the base and thereby increasing the base strength.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile