US 8,475,349 C1 (12,587th)
Method for folding film edges
Shaun Eugene Pirtle, Coweta, OK (US); Khurrum Shamsi, Tulsa, OK (US); and Robert Earl Cochlin, Chouteau, OK (US)
Filed by Shaun Eugene Pirtle, Coweta, OK (US); Khurrum Shamsi, Tulsa, OK (US); and Robert Earl Cochlin, Chouteau, OK (US)
Assigned to Paragon Films, Inc.
Reexamination Request No. 90/019,046, Dec. 16, 2021.
Reexamination Certificate for Patent 8,475,349, issued Jul. 2, 2013, Appl. No. 13/490,974, Jun. 7, 2012.
Application 90/019,046 is a division of application No. 12/470,238, filed on May 21, 2009, granted, now 8,221,298.
Claims priority of provisional application 61/082,398, filed on Jul. 21, 2008.
Ex Parte Reexamination Certificate issued on Apr. 22, 2024.
Int. Cl. B31F 1/00 (2006.01); B31F 7/00 (2006.01); B65H 45/22 (2006.01); B65H 18/10 (2006.01)
CPC B31F 1/0016 (2013.01) [B31F 7/006 (2013.01); B65H 45/22 (2013.01); B65H 18/10 (2013.01); B65H 2301/414322 (2013.01); B65H 2301/4148 (2013.01); B65H 2701/11234 (2013.01); B65H 2701/1752 (2013.01); Y10T 428/2419 (2015.01); Y10T 428/2495 (2015.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-11 are cancelled.
At the time of issuance and publication of this certificate, the patent remains subject to pending reissue application number 18/413,463 filed Jan. 16, 2024. The claim content of the patent may be subsequently revised if a reissue patent is issued from the reissue application.
1. A method for producing folded edges in a film in-process, the method comprising the steps of
providing a film section with edges created by longitudinal slits;
providing a first idler roll;
providing a second idler roll separated from the first idler roll by a first distance;
providing a plurality of folding guides that are positioned between the first idler roll and the second idler roll;
moving the film section over the first idler roll;
moving the film section past the folding guides, wherein each folding guide separates adjacent sections of film and induces two folds by causing an edge of each section of film to turn under 180° and spontaneously cling to a bottom surface of the film; and
moving the film section over the second idler roll.