| Title of Invention | A METHOD OF PROCESSING A FILM AND A STRETCHER FOR PROCESSING A FILM |
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| Abstract | The invention relates to a method of processing a film, the method comprising the steps of: conveying a film within a stretcher along a machine direction while holding opposing edge portions of the film; and stretching the film within the stretcher by moving the opposing edge portions along diverging, substantially parabolic paths to form a stretched film. The invention also relates to a stretcher for processing a film, the stretcher comprising: a plurality of clips to hold opposing edge portions of the film; paths along which the clips travel, wherein at least a portion of the paths define diverging, substantially parabolic courses; and a drive mechanism to convey the film and clips along a machine direction. |
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1872-chenp-2003 correspondence others.pdf
1872-chenp-2003 correspondence po.pdf
1872-chenp-2003 description (complete).pdf
1872-chenp-2003 power of attorney.pdf
| Patent Number | 234197 | ||||||||||||||||||
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| Indian Patent Application Number | 1872/CHENP/2003 | ||||||||||||||||||
| PG Journal Number | 24/2009 | ||||||||||||||||||
| Publication Date | 12-Jun-2009 | ||||||||||||||||||
| Grant Date | 08-May-2009 | ||||||||||||||||||
| Date of Filing | 28-Nov-2003 | ||||||||||||||||||
| Name of Patentee | 3M INNOVATIVE PROPERTIES COMPANY | ||||||||||||||||||
| Applicant Address | 3M CENTER, SAINT PAUL, MINNESOTA 55133-3427, | ||||||||||||||||||
Inventors:
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| PCT International Classification Number | B29L 11/00 | ||||||||||||||||||
| PCT International Application Number | PCT/US02/17148 | ||||||||||||||||||
| PCT International Filing date | 2002-05-29 | ||||||||||||||||||
PCT Conventions:
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