US 11,655,572 B2
Method and apparatus for relofting a nonwoven substrate
Rong Deng, Mason, OH (US); Aleksey M. Pinyayev, Cincinnati, OH (US); Valerie J. Henderson, Liberty Township, OH (US); and Craig A. Powell, Independence, KY (US)
Assigned to THE PROCTER & GAMBLE COMPANY, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Nov. 21, 2019, as Appl. No. 16/690,276.
Claims priority of provisional application 62/780,511, filed on Dec. 17, 2018.
Prior Publication US 2020/0190715 A1, Jun. 18, 2020
Int. Cl. B29C 35/08 (2006.01); B29C 61/04 (2006.01); B32B 38/00 (2006.01); B32B 3/26 (2006.01); D04H 1/558 (2012.01); A61F 13/537 (2006.01); B32B 5/26 (2006.01); D04H 1/485 (2012.01)
CPC D04H 1/558 (2013.01) [A61F 13/53708 (2013.01); B29C 61/04 (2013.01); B32B 3/266 (2013.01); B32B 5/26 (2013.01); B32B 38/0036 (2013.01); D04H 1/485 (2013.01); B29C 2035/0822 (2013.01); B32B 2038/0088 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A method for relofting a substrate, the method comprising:
advancing a substrate in a machine direction MD around a traversing idler having an axis, the substrate comprising a first surface and an opposing second surface and defining a width in a cross direction;
providing a first infrared radiation source;
directing a first length of the substrate to advance in a first direction; and
moving the axis from a first position to a second position to place the first surface of the first length of the substrate in a facing relationship with the first infrared radiation source;
irradiating the first surface of the first length of the substrate with infrared radiation from the first infrared radiation source, wherein the substrate comprises a first caliper upstream of the first infrared radiation source and wherein the substrate comprises a second caliper downstream of the first infrared radiation source, wherein the second caliper is at least 1.2 times the first caliper;
redirecting a second length of the substrate around the axis to advance the second length of the substrate from the first direction to a second direction that is opposite the first direction, wherein the second surface of the first length of the substrate is in a facing relationship with the second surface of the second length of the substrate;
providing a second infrared radiation source in a facing relationship with the first surface of the second length of the substrate; and
irradiating the first surface of the second length of the substrate with infrared radiation from the second infrared radiation source.