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:
Feb. 09, 2021
Filed:
Apr. 18, 2016
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
William W. Merrill, White Bear Lake, MN (US);
Jeffery N. Jackson, Woodbury, MN (US);
Andrew T. Ruff, Mendota Heights, MN (US);
John A. Wheatley, Lake Elmo, MN (US);
Dennis L. Krueger, Hudson, WI (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 55/08 (2006.01); B29C 55/20 (2006.01); B29C 69/00 (2006.01); B29L 11/00 (2006.01); G02B 5/30 (2006.01); B29K 67/00 (2006.01);
U.S. Cl.
CPC ...
B29C 55/08 (2013.01); B29C 55/20 (2013.01); B29C 69/001 (2013.01); B29C 2793/009 (2013.01); B29K 2067/003 (2013.01); B29K 2995/0051 (2013.01); B29L 2011/00 (2013.01); G02B 5/3033 (2013.01); Y10S 425/041 (2013.01);
Abstract
A stretcher for processing a film is described. In particular, stretcher receives a film, graps edge portions of the film, conveys the film in a machine direction, and moves the opposing edge portions along diverging; substantially parabolic paths to form a stretched film.