US 11,654,600 B2
Methods, apparatus, and chemical compositions for selectively coating fiber-based food containers
Yoke Dou Chung, Chandler, AZ (US); Yiyun Zhang, Gilbert, AZ (US); Ric Gonzalez, Chandler, AZ (US); Steve Lucero, Chandler, AZ (US); Min Wang, Gilbert, AZ (US); Indarpal Singh, Omaha, NE (US); Margaret T. Pandis, Omaha, NE (US); and Jordan M. Boerma, Omaha, NE (US)
Assigned to Footprint International, Inc., Gilbert, AZ (US)
Filed by Footprint International, LLC, Gilbert, AZ (US)
Filed on Dec. 23, 2019, as Appl. No. 16/726,165.
Application 16/726,165 is a continuation in part of application No. 15/220,371, filed on Jul. 26, 2016, abandoned.
Prior Publication US 2020/0206984 A1, Jul. 2, 2020
Int. Cl. D21H 17/17 (2006.01); B29C 41/50 (2006.01); B65D 81/34 (2006.01); B65D 25/14 (2006.01); B65D 1/26 (2006.01); D21J 1/06 (2006.01); D21J 1/10 (2006.01); D21J 7/00 (2006.01); B05B 1/06 (2006.01); D21H 17/67 (2006.01); D21H 21/16 (2006.01); D21H 23/04 (2006.01); B29L 31/00 (2006.01); B05D 1/02 (2006.01); D21J 5/00 (2006.01); D21H 23/50 (2006.01); D21H 23/22 (2006.01); B05B 1/04 (2006.01)
CPC B29C 41/50 (2013.01) [B05B 1/06 (2013.01); B65D 1/26 (2013.01); B65D 25/14 (2013.01); B65D 81/3453 (2013.01); D21H 17/17 (2013.01); D21H 17/675 (2013.01); D21H 21/16 (2013.01); D21H 23/04 (2013.01); D21J 1/06 (2013.01); D21J 1/10 (2013.01); D21J 7/00 (2013.01); B05B 1/044 (2013.01); B05D 1/02 (2013.01); B05D 2203/22 (2013.01); B29L 2031/7132 (2013.01); D21H 5/0005 (2013.01); D21H 5/0047 (2013.01); D21J 5/00 (2013.01)] 17 Claims
 
1. A method of manufacturing a fiber based microwave bowl of the type including a substantially circular bottom portion bounded by an inclined circumferential side wall, the method comprising the steps of:
providing a wire mesh mold approximating the shape of the bowl;
preparing an aqueous fiber based slurry comprising up to 100% virgin fiber;
adding an embedded moisture barrier to the slurry;
immersing the mold in the slurry;
drawing a vacuum across the mold within the slurry until a desired thickness of fiber particles accumulates at a surface of the mold;
removing the accumulated particles from the mold;
drying and pressing the accumulated particles in a press to thereby form the bowl;
transferring the bowl from the press to a coating station; and
applying an acrylic based oil barrier layer to a surface of the bowl at the coating station.