US 9,809,913 B2
Bulk recovery apparatus for nonwoven fabric and bulk recovery method for the same
Jun Okuda, Kagawa (JP); and Satoshi Mitsuno, Kagawa (JP)
Assigned to UNICHARM CORPORATION, Ehime (JP)
Appl. No. 15/30,043
Filed by UNICHARM Corporation, Ehime (JP)
PCT Filed Oct. 6, 2014, PCT No. PCT/JP2014/076719
§ 371(c)(1), (2) Date Apr. 15, 2016,
PCT Pub. No. WO2015/056597, PCT Pub. Date Apr. 23, 2015.
Claims priority of application No. 2013-217194 (JP), filed on Oct. 18, 2013.
Prior Publication US 2016/0251779 A1, Sep. 1, 2016
Int. Cl. D06C 7/00 (2006.01); D04H 1/70 (2012.01); D06C 3/00 (2006.01)
CPC D06C 7/00 (2013.01) [D04H 1/70 (2013.01); D06C 3/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An apparatus that recovers a bulk of a nonwoven fabric by blowing hot air and heating the nonwoven fabric that is transferred in a transfer direction, comprising:
a case member that has both end portions thereof in the transfer direction opened;
an entrance that is provided to an opening on one end side, in the transfer direction, of the case member, the entrance being used to transfer the nonwoven fabric;
an exit that is provided to an opening on an other end side, in the transfer direction, of the case member, the exit being used to transfer the nonwoven fabric; and
a blast opening that is provided to a part on the entrance side of the case member and blasts into a space inside the case member the hot air toward a part on the exit side, wherein
a sectional area at a first position, of the space inside the case member, on a downstream side along the transfer direction with respect to a position where the blast opening is provided, is wider than a sectional area at a second position, of the space inside the case member, located between the position where the blast opening is provided and the first position and
the hot air that is blasted from the blast opening flows from an upstream side along the transfer direction through the first and second positions and to the downstream side along the transfer direction while coming into contact with one face of two faces of the nonwoven fabric in the space inside the case member.