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| Number | Title | Issue Date |
| 6605186 | Headbox for gypsum/fiber board production A headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls. The housing has curved sections shaped to conform to the outer cylindrical surface of the distribution rolls, wherein the curved section is clo... | 08/12/2003 |
| 6413376 | Headbox for gypsum/fiber board production A headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls. The housing has curved sections shaped to conform to the outer cylindrical surface of the distribution rolls, wherein the curved section is clo... | 07/02/2002 |
| 5681251 | Distributor roll A distributor roll for use in a headbox of a paper-making machine, includes at least two support plates, with each said support plate having a circumferential edge. A plurality of square elongate members connect between the circumferential edges of the su... | 10/28/1997 |
| 5674364 | Method and device in the regulation of a headbox A method and device in the regulation of the headbox of a paper machine/board machine, in which additional flows are introduced into the pulp suspension at different points across the width of the headbox. The concentration of the additional flows is diff... | 10/07/1997 |
| 5423948 | Headbox with a vertical partition between perforated rolls A headbox for a paper machine, with a main chamber through the lower part of which flows fiber suspension in the longitudinal machine direction. The main chamber has on the upstream end a first perforated roll and a machine-wide feed channel as well as on... | 06/13/1995 |
| 5298126 | Headbox for a paper-making machine In a headbox for a paper machine a hydraulic headbox is combined with an apertured roller headbox, with at least one movable insert part (15) through which the material suspension (5) can flow being provided in the region of the flow channel (4) and/or of... | 03/29/1994 |
| 5277765 | Headbox with a vertical partition between perforated rolls A headbox for a paper machine, with a main chamber through the lower part of which flows fiber suspension in the longitudinal machine direction. The main chamber has on the upstream end a first perforated roll and a machine-wide feed channel as well as on... | 01/11/1994 |
| 5100513 | Defloccing and distribution rolls for papermachine headbox Apparatus for even distribution of, and for maintaining fibrous slurries in a deflocculated state in close proximity to the slice of a papermachine headbox, respectively. The apparatus, in the first instance, comprises one or more axial (center) flow dist... | 03/31/1992 |
| 4559104 | Apparatus for discharging material An apparatus is disclosed for discharging material through an elongate aperture in a substantially constant amount per unit length of said aperture. The apparatus comprises a screw discharging unit having an inlet end and including a screw housing with a ... | 12/17/1985 |
| 4132592 | Entangled non-woven web-forming apparatus In an apparatus for forming a non-woven, fibrous web, a device for making a uniform density dispersion of the fibers in an aqueous fiber slurry and depositing the dispersion onto a web former, while maintaining its integrity. The device includes a general... | 01/02/1979 |
| 4048008 | Method of and apparatus for forming sheets of fibrous material between converging sieves A technique for forming single or multi-layer sheets of fibrous material having a controllable fiber distribution is described. A pair of spraying rollers each having a system of circumferentially spaced radial vanes on its surface are supported within th... | 09/13/1977 |
| 4031013 | Method and apparatus for fiber suspension dewatering A method and apparatus for dewatering of cellulose pulp or other fiber suspensions. A suspension of relatively low solids concentration is passed into a sealed housing through an inlet, substantially filling the housing. The suspension is dewatered by bri... | 06/21/1977 |
| 3979254 | Secondary headbox for overlay application in board formation A secondary headbox is described which is capable of handling water slurries of relatively high solids consistencies and applying the slurries to a base sheet as it is being formed on conventional fourdrinier equipment in the manufacture of a board produc... | 09/07/1976 |
| 3960654 | Shear pump headbox An improved headbox for a papermachine is provided wherein a pair of lobed rotors which extend the full width of the headbox are mounted for delivering paper making stock to rotation in the headbox. As the rotors are rotated, the lobes create a pumping ac... | 06/01/1976 |
