| Title of Invention | METHOD FOR PRODUCING AN APERTURED FILM |
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| Abstract | A method for producing an aperture film. The method comprises positioning a stretchable thermoplastic film on the top surface of a rotatable hollow drum having a peripheral wall made of a polymeric material, said wall having a plurality of apertures. It further comprises directing hot air against said film on said top surface of said drum to raise the temperature of said film above its softening temperature; rotating said drum while the hot air is being directed against said top surface; creating a sufficient pressure inside said drum to cause apertures to be formed in said film corresponding to the plurality of apertures in said drum; cooling said aperture film to a temperature below its softening temperature; and removing said aperture film from said drum. |
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00234-cal-2002-correspondence.pdf
00234-cal-2002-description (complete).pdf
00234-cal-2002-letter patent.pdf
234-CAL-2002-(18-10-2012)-FORM-27-1.pdf
234-CAL-2002-(18-10-2012)-FORM-27.pdf
| Patent Number | 211049 | ||||||||||||
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| Indian Patent Application Number | 234/CAL/2002 | ||||||||||||
| PG Journal Number | 42/2007 | ||||||||||||
| Publication Date | 19-Oct-2007 | ||||||||||||
| Grant Date | 16-Oct-2007 | ||||||||||||
| Date of Filing | 24-Apr-2002 | ||||||||||||
| Name of Patentee | MCNEIL-PPC, INC | ||||||||||||
| Applicant Address | GRANDVIEW ROAD, SKILLMAN, NJ 08558, | ||||||||||||
Inventors:
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| PCT International Classification Number | B 23 K 26/00 | ||||||||||||
| PCT International Application Number | N/A | ||||||||||||
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PCT Conventions:
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