David K Lange

US Patent:

8349138, Jan 8, 2013

Filed:

May 18, 2010

Appl. No.:

12/800547

Inventors:

Wilhelm Mausser - Graz, AT
Andreas Anzel - Graz, AT
Harald Weigant - Stattegg, AT
David V. Lange - Beloit WI, US

Assignee:

Andritz AG - Graz

International Classification:

D21F 3/04
D21F 3/02

US Classification:

1623583, 1623582, 1623584, 162361, 162901, 100153

Abstract:

A process and apparatus for treating a pulp web () in a paper or board machine in a pressing unit () with one press roll () that has a rotating press shell () and one opposing roll (), where the pulp web () is dewatered in an extended press nip () between the opposing roll () and the pressing shell () of the press roll (). The pulp web () is carried on the rotating pressing shell () of the press roll () to a transfer zone (), where the pulp web () is passed from the pressing shell () onto a transfer element () after leaving the extended press nip ().

US Patent:

50115782, Apr 30, 1991

Filed:

Oct 24, 1990

Appl. No.:

7/602602

Inventors:

David V. Lange - Beloit WI
Scott E. Filzen - Eau Claire WI

Assignee:

Beloit Corporation - Beloit WI

International Classification:

D21F 302

US Classification:

162358

Abstract:

An extended nip press apparatus is disclosed for pressing water from a web of paper. The press includes a blanket which defines an endless loop and a first and a second lateral edge. Edge seals cooperate with the edges for sealing the edges of the blanket against egress of lubricant disposed between the shoe and the blanket. The edge seals include a head rotatably secured to a frame and an extension which extends from the head. The extension cooperates with the first edge of the blanket and defines a duck's bill configuration in a cross-machine sectional view such that the first edge of the blanket conforms to a surface defined by the extension. The surface has a first portion which undulates radially away from the head in an outward direction, and a second portion which undulates radially inwardly towards the head in an outward direction. A clamp adjustably secures the first edge of the blanket to the extension so that flow of lubricant from between the shoe and the blanket past the head is inhibited.

US Patent:

47909080, Dec 13, 1988

Filed:

Feb 19, 1988

Appl. No.:

7/157674

Inventors:

Arnold J. Roerig - Beloit WI
David V. Lange - Beloit WI

Assignee:

Beloit Corporation - Beloit WI

International Classification:

D21F 300

US Classification:

162199

Abstract:

An extended nip press has a looped belt mounted over a shoe having a concave surface which presses the belt against a mating surface on a roll to provide an extended nip. The shoe has a support which is movable in a skewing sense relative to the longitudinal axis of the roll. Lateral movement of the belt is monitored. When it has moved beyond predetermined limits in either direction, the shoe is skewed to alter the frictional forces on the belt as it passes over the shoe's surface. This controls the position of the belt and keeps it centered in the nip.

US Patent:

59806931, Nov 9, 1999

Filed:

Mar 26, 1998

Appl. No.:

9/048440

Inventors:

Shihua Liang - Roscoe IL
David McCarville - Roscoe IL
David Lange - Beloit WI

Assignee:

Beloit Technologies, Inc. - Wilmington DE

International Classification:

D21F 306

US Classification:

1623583

Abstract:

An extended nip press apparatus is disclosed for pressing a web of paper extending therethrough. The apparatus includes a rotatable backing roll and a press shoe having a concave surface which cooperates with the backing roll. The arrangement is such that the concave surface and the backing roll define therebetween an elongated pressing section for the passage therethrough of the web. The shoe includes an upstream portion and a device for urging the upstream portion toward the backing roll. A downstream portion extends from the upstream portion, the downstream portion being resiliently disposed relative to the upstream portion. A further device selectively urges the downstream portion toward the backing roll for controlling a pressure profile applied by the shoe to the web for inhibiting delamination of the web.

US Patent:

49751522, Dec 4, 1990

Filed:

Jul 6, 1989

Appl. No.:

7/376330

Inventors:

Scott E. Filzen - Beloit WI
David V. Lange - Beloit WI
Timothy L. Hauser - Jefferson WI

Assignee:

Beloit Corporation - Beloit WI

International Classification:

D21F 308

US Classification:

162358

Abstract:

An enclosed extended nip press apparatus is disclosed for pressing water from a formed web. The apparatus includes a frame and a backing roll rotatably secured to the frame. A press member cooperates with a backing roll for defining therebetween an extended nip for the passage therethrough of the formed web. A press blanket extends in a closed loop through the nip, the blanket having a first and a second lateral edge and an inner and an outer surface. A first and a second head are rotatably secured to the press member with the first and second heads being disposed adjacent to and cooperating with the first and the second edges respectively of the blanket. The first and the second heads define first and second annular channels respectively for the reception therein of the first and the second lateral edges respectively of the blanket. A first and a second annular seal are disposed within respectively the first and the second channels with the seals contacting the respective edges of the blanket. A first and second plurality of barbs extend from the first and the second channels respectively such that the first plurality of barbs extend towards and engage the first lateral edge of the blanket and are disposed on the opposite surface of the blanket relative to the first seal.

US Patent:

56434162, Jul 1, 1997

Filed:

Jun 7, 1996

Appl. No.:

8/659815

Inventors:

David V. Lange - Beloit WI
David J. McCarville - Roscoe IL
Jeffrey R. Garde - Orfordville WI

Assignee:

Beloit Technologies, Inc. - Wilmington DE

International Classification:

D21F 308

US Classification:

162199

Abstract:

An Extended Nip-type press has a blanket which passes over a shoe which is urged against a backing roll to form a press nip. A hydraulic system and controller provides for automatic continuous oscillation of the blanket in the cross machine direction. The oscillation results in a region of high fatigue continuously moving over the blanket surface so that the amount of time any particular region sees wear is minimized. Positioning of the heads to which the blanket ends are mounted is controlled by hydraulic pistons mounted between a support beam and the heads. A controller operates a valve to reverse the direction of motion of the blanket when sensors indicate one end of the blanket has reached a stop. A throttle valve controls the rate at which hydraulic fluid is supplied to the cylinders which urge the head away from the shoe.

US Patent:

47418052, May 3, 1988

Filed:

Jul 23, 1987

Appl. No.:

7/076826

Inventors:

David V. Lange - Beloit WI

Assignee:

Beloit Corporation - Beloit WI

International Classification:

D21F 302

US Classification:

162205

Abstract:

A guiding apparatus is disclosed for guiding an extended nip press blanket relative to a pressing shoe. The apparatus includes a nose member which is pivotally-connected to the shoe for guiding the blanket relative to the shoe. An actuator is secured to the shoe for pivoting the nose member relative to the shoe. A connector extends between the actuator and the nose member for connecting the actuator to the nose member such that when the actuator is actuated, the nose member is skewed relative to the shoe so that the blanket is guided laterally relative to the shoe as the blanket moves over, and in contact with, the nose member.

US Patent:

63062585, Oct 23, 2001

Filed:

Sep 26, 2000

Appl. No.:

9/670151

Inventors:

David V. Lange - Beloit WI
Roger A. Kanitz - Beloit WI
Richard D. Hauser - Brodhead WI
Patrick W. Murry - Beloit WI
Doug A. Rounds - Beloit WI
Robert L. Clarke - Roscoe IL
Frank S. Hada - Appleton WI
Michael A. Hermans - Neenah WI
Charles R. Tomsovic - Omro WI

Assignee:

Metso Paper, Inc. - Helsinki
Mitsubishi Heavy Industries, Ltd. - Tokyo
Kimberly-Clark Worldwide, Inc. - Neenah WI

International Classification:

D21F 514

US Classification:

162290

Abstract:

A pressurized box is positioned opposite a vacuum box. The pressurized box has a leading cross machine direction baffle with a ceramic shoe which engages a forming fabric, and a trailing cross machine direction baffle of similar construction. Two end deckles complete the pressurized box. The leading cross machine direction baffle presses against a resilient seal which causes a web contained between upper and lower forming fabrics to wrap about the baffle shoe a few degrees forming an effective end seal which does not allow air to bypass the baffle. The trailing cross machine direction baffle is positioned over a vacuum box which prevents air from leaking around the trailing baffle. A vacuum box draws air through the forming fabrics and the web, from the pressurized box increasing the total pressure gradient across the web to 20 to 30 psi or more. The pressure box and opposed vacuum box form an air press.