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:
Feb. 02, 1999
Filed:
Mar. 24, 1997
Wendell Conn, Polk, OH (US);
Rubbermaid Incorporated, Wooster, OH (US);
Abstract
An improved method of blow molding a hollow article is disclosed comprising the adaptation of a die pin (26) to include spaced apart channels (38) therein that extend from top to bottom along the sides of the die pin. The channels create reinforcement ribs (70) along the inside surface (68) of a formed parison (30). The ribs expand with the parison into a final form and serve to reinforce the resultant body while being visible only from the inside. The channels (38) are each bifurcated to provide a segment (44) below a shut-off surface (46) in which plastic exiting the die pin can expand to form ribs (70) of substantial thickness. Portions of the parison sidewalls (66) between the ribs (70) are thinned to reduce part weight and the ribs (70) reinforce the sidewalls to compensate yet, being visible only from the inside, do not detract from the external appearance of the article.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile