US 9,809,372 B2
Humidity control insert for cigarette packs
Andries Don Sebastian, Clemmons, NC (US); Lisa Brown, Lexington, NC (US); Frank Kelley St. Charles, Lewisville, NC (US); Ercilia B. Hernandez Garcia, Cary, NC (US); Pankaj C. Patel, Clemmons, NC (US); Craig T. Demarest, Oak Ridge, NC (US); and Daniel V. Cantrell, Lewisville, NC (US)
Assigned to R.J. Reynolds Tobacco Products, Winston-Salem, NC (US)
Filed on Feb. 1, 2017, as Appl. No. 15/422,039.
Application 15/422,039 is a division of application No. 14/600,914, filed on Jan. 20, 2015, granted, now 9,566,605.
Prior Publication US 2017/0158407 A1, Jun. 8, 2017
Int. Cl. B01D 53/02 (2006.01); B65D 81/26 (2006.01); B05D 3/12 (2006.01); B05D 3/02 (2006.01); B65D 85/10 (2006.01)
CPC B65D 81/264 (2013.01) [B05D 3/0254 (2013.01); B05D 3/12 (2013.01); B65D 85/1081 (2013.01)] 15 Claims
OG exemplary drawing
1. A method for making a humidity control insert for a package, the humidity control insert comprising a porous nonwoven fibrous substrate and a hygroscopic powder material dispersed within the porous nonwoven fibrous substrate, the method comprising:
dispersing the hygroscopic powder material into the porous nonwoven fibrous substrate by a dry powder impregnation process;
wherein the hygroscopic powder material is dispersed into the porous nonwoven fibrous substrate using an alternating electric field.