Abstract: An improved method for producing paper from pulp includes a plurality of subassemblies arranged in the forming or wet section of a Fourdrinier. The Fourdrinier includes a dewatering table having a plurality of blades that are static and on-the run adjustable in height and/or angle to control orientation of paper fibers in the stock to create a superior quality of paper and improved paper strength characteristics. Gravity and vacuum assisted drainage elements are equipped with on-the-run adjustable angle and height dewatering foil blades starting from a paper dryness of 0.1% and extending all the way to 5% dryness. The result of this process and machine is to improve the paper quality, save fibers and chemicals and fulfill the required paper properties.

Abstract: A method and apparatus for transferring vibrational forces to a wire of a papermaking machine for forming a web on the wire and for dampening vibrations imparted to the papermaking machine. In some embodiments, the apparatus is a vibrational device including a vibrational device frame, a vibration isolator coupled to the vibrational device frame to dampen vibration transmission to the papermaking machine, a vibration-inducing mechanism coupled to the vibrational device frame and operable to generate a vibration having a frequency and positioned laterally with respect to the vibration isolator in the cross-machine direction, and a vibrational head coupled to the vibration-inducing mechanism and directly contacting the wire to impart vibration to the wire.

Abstract: The invention relates to a method of draining a fibre pulp suspension, where the fibre pulp suspension is applied to a convergent dewatering space arranged between two wires travelling in the same direction. In the dewatering space, water and powdery substance are removed from the fibre pulp suspension through the wires. Pressure pulses are generated in the fibre pulp suspension along the length of the dewatering space with pressure pulse elements that are on opposite sides of the wires relative to the fibre pulp suspension and in contact with or at a distance from the wires. The invention also relates to an apparatus according to the method.

Abstract: A process, and an apparatus, for improving sheet properties in the initial impingement zone of a paper making machine including a forming section, a forming fabric moving in the machine direction and a head box having a head box slice which delivers a stock jet onto the moving forming fabric. The scale and intensity of agitation within the stock is adjusted by adjusting some of the support elements beneath the forming fabric adjacent the head box slice so that they either contact, or do not contact, the machine side surface of the forming fabric and observing the effect, if any, that the adjustment has on the quality of the sheet product being made on the paper making machine. This technique is of use in a papermaking machine forming section having a single open surface forming fabric, in the initial open surface section of a so-called hybrid gap former having two superposed forming fabrics, and in the forming section of a two fabric papermaking machine.

Abstract: A method and apparatus for transferring a vibrational force to the wire of a papermaking machine in order to re-align the fibers of the web forming on the wire or to clean press section felts. In one preferred embodiment, the apparatus is a vibrational device including a vibrational device frame, at least one vibration-inducing mechanism coupled to the vibrational device frame, and a vibrational head coupled to the vibration-inducing mechanism for vibrating the wire.

Abstract: Hardened wear-resistant members are secured to an underlying body member in a manner to accommodate differing coefficients of thermal expansion. In one form a connector comprising shear compliant material is secured at one of its faces to the body member and a hardened wear-resistant member is secured to the opposite face of the connector. In another embodiment, the body member has adjacent portions resiliently connected to each other and the engaging member is secured at spaced locations to the two resiliently joined portions such that different thermal expansion of the two parts will be accommodated.

Abstract: The apparatus of the present invention is a papermaking machine with a forming fabric in a looped configuration. The forming fabric carries paper stock through the papermaking process. The forming fabric passes over a liquid-filled cavity which is bounded on its lower surface by a flexible non-permeable membrane. A roll with regular protrusions underneath the membrane is rotated to vertically excite the membrane, the liquid-filled cavity, and, subsequently, the paper stock in order to disperse the paper stock into a random orientation.

Abstract: A turbulence roll for a web former. The roll generates high frequency small-scale vibration in the stock on the forming fabric whereby fluidization of the partially formed fiber mat and dispersion of fiber flocs in the stock is brought about. The turbulence roll is formed of a shaft on which a plurality of discs (32) is disposed a distance apart from each other and a plurality of lengthwise extending rods (34) is attached to the rims of the discs and spaced apart from each other.

Abstract: In a Fourdrinier paper making machine a dispersion roll mounted between the headbox and the suction and dewatering means, underneath in contact with the Fourdrinier travelling fabric and extending laterally across the width of the fabric, and adapted to rotate at about the same speed as that of the fabric; the roll having a fluted surface of alternating lands and grooves, and a plurality of spaced, parallel, lateral slots across each said land to communicate each groove with the next adjacent groove. The function of the roll is to vibrate the travelling fabric and cause better dispersion of the paper fibers.

Abstract: The wet end of a fourdrinier paper machine includes a transversely disposed roll beneath the wire. The roll is shaped and mounted for rotation at a speed which is different from the speed of the wire to create pulses of negative pressure beneath the wire for drawing liquid from the web of fibers formed thereon. Also disclosed is a fin apparatus transversely disposed beneath the wire to create a wave of positive pressure thereunder to urge the formed web off of the wire.

Abstract: A process, and an apparatus, for improving sheet properties in the initial impingement zone of a paper making machine including a forming section, a forming fabric moving in the machine direction and a head box having a head box slice which delivers a stock jet onto the moving forming fabric. The scale and intensity of agitation within the stock is adjusted by adjusting some of the support elements beneath the forming fabric adjacent the head box slice so that they either contact, or do not contact, the machine side surface of the forming fabric and observing the effect, if any, that the adjustment has on the quality of the sheet product being made on the paper making machine. This technique is of use in a papermaking machine forming section having a single open surface forming fabric, in the initial open surface section of a so-called hybrid gap former having two superposed forming fabrics, and in the forming section of a two fabric papermaking machine.