The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 1990
Filed:
Aug. 26, 1988
Oscar Luthi, Nashua, NH (US);
Frederick S Lewis, Nashua, NH (US);
Lawrence A Carlsmith, Amherst, NH (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
A method and apparatus for forming on the outside of a permeable, rotatable drum by feeding a pulp slurry through a mat forming and pressing zone, followed by a mat washing zone. In the mat washing zone, the mat is washed with liquid from the first source and then washed with liquid from a second source. A Washing baffle has a first portion extending from its upstream end partially along the outside surface of the drum and slightly spaced from the outside surface of the drum. This first portion is followed by a second portion extending partially along the outside surface of the drum and spaced further from the outside surface of the drum than the first portion. A valve is provided for controlling the velocity of liquid through a slot into a circumferential space separating the washing baffle from the drum.