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. 30, 2010
Filed:
Jan. 31, 2006
Mark A. Strobel, Maplewood, MN (US);
Michael J. Ulsh, Woodbury, MN (US);
Joel A. Getschel, Osceola, WI (US);
Mark A. Strobel, Maplewood, MN (US);
Michael J. Ulsh, Woodbury, MN (US);
Joel A. Getschel, Osceola, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An apparatus and methods for flame-perforating films. A preferred embodiment of the apparatus includes a frame, support surface attached to the frame, where the support surface includes a plurality of lowered portions, a burner attached to the frame opposite the support surface, where the burner supports a flame, and where the flame includes a flame tip opposite the burner and a film contacting the support surface, where the flame of the burner is in contact with the film, where the burner is positioned such that the distance between an unimpinged flame tip of the flame and the burner is at least one-third greater than the distance between the film and the burner.