Pinned rollers and process for manufacturing fibrillated film
Patent 5104367 Issued on April 14, 1992. Estimated Expiration Date: 
November 20, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 20, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 617395 filed on 11/20/1990US Classes:493/42, With shaping or compacting of filter material83/660, Pointed perforators264/154, Making hole or aperture in article493/338, WITH EXTRUDING, DRAWING, OR ATTENUATING493/471RotaryExaminersPrimary: Kisliuk, Bruce M.Assistant: Lavinder, Jack Attorney, Agent or FirmForeign Patent References
International ClassesB26F 001/24B65H 035/08 AbstractA roller for use in fibrillating oriented films of polyolefin materials having a plurality of pins projecting from the surface of the roller. The pins are distributed in a plurality of rows spaced around the roller surface. The rows each contain about 25 to 34 pins per inch in a space-staggered relationship along two adjacent lines extending along the surface of the roller, either in a linear relationship inclined to a line parallel to the axis or rotation, or in a sinusoidal relationship with adjacent rows being in or out of phase. The roller is rotated and the film is advanced over the rotating roller surface for an arc length of contact of about 30 to 37 degrees to fibrillate the film. The ratio of the surface speed of the roller to the advancing film are controlled to a ratio between from about 1.8:1 to about 2.2:1.Field of SearchWith shaping or compacting of filter materialIncluding fluid contact for forming Prior to assembly with other cigarette filter material Filter of fibrous material WITH EXTRUDING, DRAWING, OR ATTENUATING By use of composite cutting, breaking, tearing, or abrading tool and folding tool By use of composite cutting, breaking, tearing, or abrading tool and form scoring or crushing tool Crushing or crumpling Plural breakers Pointed perforators Making hole or aperture in article Severing means is perforator | |
