Patents by Inventor Dennis C. Cronin

Dennis C. Cronin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5328569
    Abstract: A curved suction box apparatus is disclosed for guiding a web towards a nip of a nip press. The apparatus includes an initial shoe which is disposed upstream relative to the nip, the shoe defining a convex surface for guiding the web. A box is disposed downstream relative to the initial shoe for guiding the web from the initial shoe. The box is connected to a partial vacuum.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: July 12, 1994
    Assignee: Beloit Technologies, Inc.
    Inventor: Dennis C. Cronin
  • Patent number: 5167768
    Abstract: A wide area type of wet press for dewatering an endless traveling web, such as paper, wherein a shoe having a curved face is applied to a traveling belt which travels through a high pressure zone between the shoe and a rotating backing roll. The nip line of the most intense nip pressure along the length of contact of the shoe over the backing roll is selectively located, as desired, by pivotally supporting the shoe about two, parallel, longitudinally extending axes which, in turn, are supported on separately controlled hydraulic pistons. The pressure profile of the nip pressure over the face of the shoe can also be altered by controlling the hydraulic pressure in the support pistons.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: December 1, 1992
    Assignee: Beloit Corporation
    Inventors: Dennis C. Cronin, Arnold J. Roerig
  • Patent number: 4978428
    Abstract: A bearing blanket is disclosed for an extended nip press of a papermaking machine. The blanket (44) includes a base (46) having a first and a second side (48, 50). A first laminate (52) extends along the first side (48) of the base (46), the first laminate (52) having an interface (54) which is disposed contiguous with the first side (48) of the base (46) and a face (56) which cooperates with a hydraulically loaded shoe (22) of the extended nip press (12). A second laminate (58) extends along the second side (50) of the base (46) with the second laminate (58) having a surface (60) which is disposed contiguous with the second side (50) of the base (46). The second laminate (58) defines a plurality of recesses (64, 66) for relieving fluid pressure during passage through the nip. The first laminate has a hardness which permits flexing of the first laminate while the second laminate has a hardness such that crushing of the recesses during passage through the extended nip is inhibited.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: December 18, 1990
    Assignee: Beloit Corporation
    Inventors: Dennis C. Cronin, David V. Lange
  • Patent number: 4908103
    Abstract: A bearing blanket is disclosed for an extended nip press of a papermaking machine. The blanket (44) includes a base (46) having a first and a second side (48, 50). A first laminate (52) extends along the first side (48of the base (46), the first laminate (52) having an interface (54) which is disposed contiguous with the first side (48) of the base (46) and a face (56) which cooperates with a hydraulically loaded shoe (22) of the extended nip press (12). A second laminate (58) extends along the second side (50) of the base (46) with the second laminate (58) having a surface (60) which is disposed contiguous with the second side (50) of the base (46). The second laminate (58) defines a plurality of recesses (64, 66) for relieving fluid pressure during passage through the nip. The first laminate has a hardness which permits flexing of the first laminate while the second laminate has a hardness such that crushing of the recesses during passage through the extended nip is inhibited.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: March 13, 1990
    Assignee: Beloit Corporation
    Inventors: Dennis C. Cronin, David V. Lange
  • Patent number: 4879001
    Abstract: An apparatus is disclosed for making a paper web from stock. The apparatus includes a first and a second forming wire which cooperate together to define therebetween a web-forming section having a first and a second end. A headbox is disposed adjacent to the first end of the forming section for ejecting the stock between the wires such that the web is formed from the stock during passage of the stock from the first towards the second end of the forming section. A first felt is disposed downstream relative to the forming section with the first felt running contiguously relative to the second wire such that the second wire is disposed between the first felt and the web. A second felt is disposed downstream relative to the forming section and on the opposite side of the web relative to the first felt.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: November 7, 1989
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4704192
    Abstract: A press apparatus is disclosed for pressing a moving web formed on a forming wire. The apparatus includes a frame and a first plurality of rolls rotatably secured to the frame. A first continuous felt extends around the first plurality of rolls which include a pickup roll disposed adjacent to the wire for transferring the web from the wire onto the first felt. The first plurality of rolls also includes a first press roll which is disposed downstream relative to the pickup roll. A second continuous felt extends around a second plurality of rolls with the second felt cooperating with the first felt. The second plurality of rolls includes a second press roll which cooperates with the first press roll for defining therebetween a first nip. The web is urged against the second felt when the web emerges from the first nip and the second felt and supported web pass through a second nip defined by an extended nip press disposed downstream relative to the first nip.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: November 3, 1987
    Assignee: Beloit Corp.
    Inventor: Dennis C. Cronin
  • Patent number: 4483745
    Abstract: A method and mechanism for positive web transfer in a press section of a papermaking machine including an intermediate press nip formed between first and second press members with a porous felt on one surface of the web and a nonporous looped smooth surface belt of nonextensible material impervious to water passing through the nip in direct contact with the other surface of the web so that the web follows the belt downstream of the nip with the web first being pressed between an earlier press upstream of the intermediate press, and the web being removed from the belt following the intermediate press with rewetting of the web on the offrunning side of the intermediate nip due to contact with the impervious belt being eliminated.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 20, 1984
    Assignee: Beloit Corporation
    Inventors: Laurie D. Wicks, Dennis C. Cronin, James L. Chance
  • Patent number: 4428797
    Abstract: An extended nip shoe for a press section in a papermaking machine distributes a compressive force to an inrunning compliant transport system advancing a web of paper. The shoe introduces and maintains a film of lubricant throughout the extended nip shoe-compliant transport system interface. Similarly, release of the compressive force is gradual to eliminate points of high unit loads on the compliant transport system and paper web.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: January 31, 1984
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4427492
    Abstract: An extended nip shoe for a press section in a papermaking machine distributes a compressive force to an inrunning compliant transport system advancing a web of paper. The shoe introduces and maintains a film of lubricant throughout the extended nip shoe-compliant transport system interface. Similarly, release of the compressive force is gradual to eliminate points of high unit loads on the compliant transport system and paper web.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: January 24, 1984
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4425190
    Abstract: An extended nip shoe for a press section in a papermaking machine distributes a compressive force to an inrunning compliant transport system advancing a web of paper. The shoe introduces and maintains a film of lubricant throughout the extended nip shoe-compliant transport system interface. Similarly, release of the compressive force is gradual to eliminate points of high unit loads on the compliant transport system and paper web.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: January 10, 1984
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4398997
    Abstract: An extended press mechanism for removing liquid from a traveling fibrous web including a press nip formed between first and second members with one of the members being a traveling flexible impervious belt and force means engaging the inner surface of the belt including a sliding shoe facing the belt with the shoe extending transversely across the belt usually of a width less than the belt and also extending in the direction of the belt travel to form an elongated press nip with means for pressing the shoe toward the belt with a predetermined force, means for providing a film of lubricating fluid between the shoe and the belt and means for removing the excess of lubricating fluid downstream from the shoe including a wiper blade extending toward the belt flexed against the belt to wipe off the lubricant with means to remove the lubricant which is wiped off and means at the side of the shoe to wipe lubricant off the uncompressed portion of the belt and means such as ribs and grooves at the edge of the belt to p
    Type: Grant
    Filed: September 16, 1981
    Date of Patent: August 16, 1983
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4330023
    Abstract: A press section for extracting water from a continuous traveling web in which the web is sandwiched between a traveling belt and a drum. The belt is wrapped partially about the drum and a pressure shoe exerts pressure on the belt in the wrap area to press the web. The laterally outer ends of the drum are relieved to provide a reduced diameter portion in the areas extending laterally outwardly of the pressure shoe.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: May 18, 1982
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4308096
    Abstract: An extended press mechanism for removing liquid from a traveling fibrous web including a press nip formed between first and second members with one of the members being a traveling flexible impervious belt and force means engaging the inner surface of the belt including a sliding shoe facing the belt with the shoe extending transversely across the belt usually of a width less than the belt and also extending in the direction of the belt travel to form an elongated press nip with means for pressing the shoe toward the belt with a predetermined force, means for providing a film of lubricating fluid between the shoe and the belt and means for removing the excess of lubricating fluid downstream from the shoe including a wiper blade extending toward the belt flexed against the belt to wipe off the lubricant with means to remove the lubricant which is wiped off and means at the side of the shoe to wipe lubricant off the uncompressed portion of the belt and means such as ribs and grooves at the edge of the belt to p
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: December 29, 1981
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin
  • Patent number: 4229253
    Abstract: A press section for extracting water from a continuous traveling web in which the web is sandwiched between a traveling belt and a drum. The belt is wrapped partially about the drum and a pressure shoe exerts pressure on the belt in the wrap area to press the web. The belt includes a reinforcing structure extending circumferentially thereof and disposed locally within the shoe area of the press section.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: October 21, 1980
    Assignee: Beloit Corporation
    Inventor: Dennis C. Cronin