Abstract: Process for making nonwoven fibrous webs having substantial strength in the direction normal to their planes. The webs exhibit good acoustical insulation properties.
Type:
Grant
Filed:
May 8, 2001
Date of Patent:
November 5, 2002
Assignee:
Boricel Corporation
Inventors:
James Harvey Kean, Tod Mitchell Kean, Kenneth Roger Williams
Abstract: An apparatus for forming a nonwoven fibrous web wherein the web contains at least one binder fiber and at least one support fiber. The apparatus comprises a mixer for creating a homogeneous mixture of the fibers, a conveyor for transporting the resulting fiber mixture to a shaker chute, an oscillating mechanism which acts on the fiber mixture, a depositing mechanism for depositing the fiber mixture onto a horizontal planar surface, a heater for heating the mixture to a temperature to fuse the binder and support fibers, and a cooling mechanism to cool the mixture after heating.
Type:
Grant
Filed:
August 3, 1999
Date of Patent:
October 23, 2001
Assignee:
Boricel Corporation
Inventors:
James H. Kean, Tod M. Kean, Kenneth R. Williams
Abstract: A loose-fill cellulose insulation having improved density can be achieved by intermingling the cellulose fibers with natural textile fibers. The textile fibers tend to maintain the spacing between the cellulose fibers, which decreases the density and minimizes settling, of the resulting insulation.
Type:
Grant
Filed:
July 16, 1997
Date of Patent:
June 8, 1999
Assignee:
Boricel Corporation
Inventors:
Tod Mitchell Kean, Michael James Kean, Dennis Dee Smith