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:
Jun. 08, 1976
Filed:
Sep. 09, 1974
Alexander James Finlay, Manchester, EN;
Geoffrey Taylor, Manchester, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
A sealing means for permitting continuous passage of a web material through a gap in a wall separating two zones at different pressures whilst minimising the flow of air from one zone to the other, comprising a cylindrical rod passing through the gap, means for feeding the web material on to the rod in helical disposition on one side of the wall, means for removing the web material from the rod after the web material has passed through the gap to the other side of the wall, and sealing means fitted to the circumference of the gap so as to contact the web material as it passes through the gap, and the use of two such sealing means as an entrance to, and exit from, an apparatus the interior of which is to be maintained at a pressure less than atmospheric pressure, and in which apparatus the web material is to be given an appropriate treatment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile