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:
Sep. 12, 1978
Filed:
Dec. 09, 1977
Applicant:
Inventor:
Warner Jan de Putter, Hardenberg, NL;
Assignee:
Wavin B.V., Zwolle, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
83 15 ; 83 22 ; 83 54 ; 83169 ; 83170 ; 425 71 ; 425290 ; 425526 ; 425445 ;
Abstract
A process for perforating plastic tubes, in particular thin-walled corrugated tubes, by a punching or cutting operation wherein the plastic tubes are subjected to a direct or indirect treatment by a cooling fluid prior to the punching and cutting operation. The process is performed by an apparatus comprising a guide structure and conveying device for conveying the plastic tubes, and further comprising punching or cutting members, while spraying devices are provided for effecting the above-mentioned cooling treatment.