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. 02, 2001
Filed:
Jun. 01, 1998
Michael Koch, King City, CA;
Krupp Corpoplast Maschinenbau GmbH, Hamburg, DE;
Abstract
The process serves the purpose of producing containers. A heated pre-form made of a thermoplastic material is stretched and inflated with the aid of a gas under pressure for purposes of molding the container. The inflating process is divided into a preliminary blowing period with a gas under a lower level of pressure and into a subsequent primary blowing period with a gas under a higher pressure level. The ratio of the container diameter to the inner diameter is selected to be greater than 4.0. The pre-form has a median wall thickness of greater than 3 millimeters and at least at the beginning of the preliminary blowing phase is provided with a material temperature greater than 70 degrees Celsius. The pre-form at least at the beginning of the preliminary blowing phase in the area to be oriented is provided in the area of its upper surface with a temperature which is at a maximum equal to a medium temperature of the inner surface of the pre-form in the area to be oriented. The temporal duration of the preliminary blowing phase is selected to be less than 1.0 second. During the preliminary blowing phase the pre-form is expanded to at least 50 percent of the volume intended for the finished blown container.