Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2008-08-29
2010-10-19
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C264S006000, C264S011000, C264S086000, C264S122000, C106S164600
Reexamination Certificate
active
07815772
ABSTRACT:
A process for manufacturing fiberboard by preparing a fiber slurry mixture including containing cellulose fibers and water then atomizing a liquid bituminous material, such as asphalt. The liquid bituminous material is atomized by mixing it with a pressurized gas, such as compressed air, forming a mist comprising droplets of bituminous material having a diameter between 20 microns and 50 microns. A water spray solidifies the bituminous material droplets thereby forming bituminous particles which fall into the fiber slurry within the spray chamber. From there the slurry is sheared, dewatered, and dried, forming a finished fiberboard.
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patent: 6068804 (2000-05-01), Betzner et al.
patent: 6997405 (2006-02-01), Haruch
Standard Specification for Performed Expansion Joint Filler for Concrete Paving and Structural Construction (Nonextruding and Resilient Bituminous Types), ASTM Standard Specification D 1751-04.
Barnes & Thornburg LLP
Halpern Mark
W. R. Meadows Inc.
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