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:
Nov. 28, 1989
Filed:
Dec. 22, 1986
Gunter Langecker, Meinerzhagen, DE;
Battenfeld Fischer Blasformtechnik GmbH, Lohmar, DE;
Abstract
A method of manufacturing hollow articles of thermoplastic materials. Initially, a compact blank, such as a tablet, a palette, a disk or the like, is formed by injection molding into a mold cavity. The blank may be composed of a plurality of layers which surround each other. Subsequently, the blank is compression-molded in the heated state to reduce its thickness and increase its surface area size. Finally, again in the heated state, the compressed blank is formed into a hollow article by a stretching and blow-molding operation. During each injection-molding step, the volume of the mold cavity is adjusted from a minimum volume to a maximum volume at a rate which corresponds to the rate of injection of the respective plastics material. While still in the heated state, at least portions of the injection molded blank are conditioned by additional heat treatments and, subsequently and/or simultaneously, a compressed and condensed mold is formed by a compression molding operation and, finally, a hollow article is formed by a stretching and blow-molding operation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile