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:
Mar. 04, 1980
Filed:
May. 08, 1978
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
Equipment for producing a pipe having a longitudinally extending diaphragm which partitions the interior of the pipe into two conduits. This equipment comprsises a die head with a circular slit to extrude the tubular body of the pipe and a flat slit to extrude the partitioning diaphragm. Means are provided to deform that diaphragm at spaced apart intervals along its length so as to intimately contact one of the pipe walls at those intervals. This means may be a nozzle having an opening for expelling a fluid against the diaphragm while it is still in a plastic state or a movable plate similarly positioned.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile