Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Reexamination Certificate
2006-10-11
2009-10-06
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
C162S158000, C162S272000, C162S275000, C134S184000, C134S198000
Reexamination Certificate
active
07597782
ABSTRACT:
A method of cleaning papermaking felt by applying a low concentration of a cleaning solution through the oscillating needle nozzles. The detergent is applied intermittently while paper is being manufactured. Each cleaning period lasts for at least the length of time required for the nozzles to cover the entire surface of the felt, and preferably twice that period of time. The application of cleaning solution is then discontinued for a period of time, generally equal to the time the cleaning detergent is applied to the felt. This cycle is repeated continuously as the paper is being manufactured. The chemistry of the cleaning solution can be changed, for example, from acidic to basic, alternately, to enhance cleaning performance.
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International Search Report and Written Opinion, mailed Sep. 24, 2007.
James E. Stein, Jr., “Needle Shower Review Highlights Best Approach to Setup, Operation”, Weavexx, Starkville, Mississippi, Mar. 1998, pp. 1-5.
Baker Gary
Kelso David
Dubois Chemicals, Inc.
Halpern Mark
Jones Day
LandOfFree
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