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. 22, 2011
Filed:
Jul. 09, 2007
Stan Johnston, Kearney, NE (US);
Brian T. Ehrenberg, Kearney, NE (US);
Kyle Swanson, Kearney, NE (US);
Steven J. Merritt, Kearney, NE (US);
Stan Johnston, Kearney, NE (US);
Brian T. Ehrenberg, Kearney, NE (US);
Kyle Swanson, Kearney, NE (US);
Steven J. Merritt, Kearney, NE (US);
Baldwin Filters, Inc., Kearney, NE (US);
Abstract
A method and apparatus are provided, for forming a filter element including a media pack in the form of a coiled fluted filter media, by winding the web of fluted filter media around a pair of tools of a mandrel. The tools engage the sides of the filter media. The tools define a major to provide the media pack with a oblong or elongated shape. The web may be fed at constant linear speed, and/or a motor may be controlled in a manner to provide constant driving torque to maintain a constant tension on the web. The winding apparatus and methods may include apparatus or methods to modify the feed path of the web to adjust the tension of the web as it is being wound. Further, the coiled media packs can be fixtured to prevent relaxation. A method may form various shaped media packs with the same apparatus.