J. M. Voith Gmbh

E.i. Dupont De Nemours and Company

Karl Wolf

Dieter Egelhof

Christian Schiel

Werner Kade

Heinrich Flaig

Bruno Freiler

Rudi Buck

The head box for a paper making machine joins the main distribution channel with an outlet nozzle that extends over the width of the machine. The head box has a plurality of linear, tubular flow channels extending from the distribution channel to the outlet nozzle. Just before entry into the outlet nozzle, each channel widens continuously, forming a continuous diffuser communicating into the outlet nozzle. In each tubular flow channel, a respective channel piece of reduced inside diameter is provided at or just upstream of the continuous diffuser. The entrance into the channel piece is developed as a step-like reduction in cross-section of the tubular channel, as compared with the cross-section of the tubular channel just upstream. The channel piece with the reduced cross-section may be defined at the entrance end of one part of the channel that is installed into a wider diameter second part of the channel that is immediately upstream, may be located at or just upstream of the continuous diffuser at the end of the tubular flow channel, or may be a bushing inserted into the tubular flow channel upstream of the continuous diffuser at the end thereof. Furthermore, a plurality of channel pieces, each with a reduced cross-section entrance, may be inserted in series in the main tubular channel.

Head box for a paper making machine

The invention relates to a stationary supporting member for the drainage wire belt of a paper machine. The supporting member has a transverse head board with a doctor-like leading edge which contacts the underside of the wire belt. The head board is formed from hard material, which has a drainage area forming a small, variable angle of inclination with the direction of travel of the wire belt. Two C-beams support the head board, one secured rigidly in the machine and the other, which carries the head board, being hinged to the rigid beam. An adjusting board on the rigid beam and having several adjustable stop surfaces distributed over its length, engages stops on which the movable beam is supported. The two beams are clamped together by means of an inflatable hose between the arms of the beam.

Stationary support member for web producing machine

A breast box nozzle for a paper making machine or the like is shown as having an adjustably positionable shutter member which can be moved generally further and lesser into the path of flow of a stream of pulp stock as to thereby determine the thickness of the discharge stream of pulp stock; a support arrangement applies a pressure to the shutter member as against a downstream side thereof in order to counter the forces generated by the stream of pulp stock upstream of the shutter member and applied as against the upstream side thereof tending to undesirably deform the shutter member; the support arrangement has an elastomeric member, which can be internally pressurized, generally interposed between a relatively fixed support member and a downstream side of the shutter member; and an elongated slide member is generally interposed between the elastomeric member and the downstream side of the shutter member.

Breast box nozzle for a paper machine

A breast box nozzle for a paper making machine or the like is shown as having an adjustably positionable shutter member which can be moved generally further and lesser into the path of flow of a stream of pulp stock as to thereby determine the thickness of the discharged stream of pulp stock. A support arrangement applies a pressure to the shutter member as against a downstream side thereof in order to counter the forces generated by the stream of pulp stock upstream of the shutter member and applied as against the upstream side thereof tending to undesirably deform the shutter member. The support arrangement includes an elastomeric member generally interposed between a relatively fixed support member and a downstream side of the shutter member.

Stock distribution means for delivering an aqueous slurry in a papermaking machine has a tapering passage which delivers stock to a nozzle by way of several rows of channels whose inlets are in communication with the passage. The passage, the entire channels and/or the inlets of the channels are configurated and dimensioned in such a way that the resistance which the inlets nearer to the intake end of the passage offer to the inflow of stock is more pronounced than the resistance of inlets which are more distant from such intake end. This insures uniformity or substantial uniformity of the volume of stock flow in each channel in spite of the fact that the channels of neighboring rows are at least partially inclined with respect to each other and that the inlets of channels in successive rows are located downstream of each other, as considered in the direction of stock flow in the passage.

Distribution means for aqueous slurry in papermaking machines

A headbox for a papermaking machine or the like in which material, such as supension, flows from the headbox between upper and lower lips and through a discharge slot defined by the lips to a wire or a like receiver. The upper lip is reinforced by a beam extending along the upper lip on top of the lip while a detector is provided for detecting deflection of the upper lip due to the forces exerted thereon by material flowing between the lips. The detector is arranged to emit signals in conformity with deflection of the upper lip and correcting influences can be initiated in conformity with the emitted signals to compensate for the aforementioned deflection. In particular, the detector includes an element stationary with the upper lip in about the center of the lateral length of the lip and another element which is stationarily mounted and which elements cooperate upon relative vertical movement therebetween to bring about the emitting of signals which represent a measure of the amount of deflection of the upper lip.

Method and apparatus for detecting vertical displacement of an upper

A paper-making machine has a stock supply conduit, a slice, and a pre-slice flow distributing system which communicates with the slice and directs a flow of paper-making stock from the supply conduit to the slice. The system includes a manifold extending longitudinally of the slice, being spaced from the same and having an inlet side through which stock flows from the conduit in direction transversely of the elongation of the manifold. A first side wall of the manifold extends from the inlet side in the flow direction and has a first wall portion which is convex transverse to the flow direction so as to be tangentially approached by the flowing stock and which is formed with a plurality of outlet openings each having a center axis. A second side wall of the manifold is transversely spaced from and extends along the first side wall, having a second side wall portion which is so inclined with reference to the first side wall portion that the direction of flow of stock travelling between and being guided by the side wall portions includes identical angles with the center axes of the respective outlet openings.

Stock inlet arrangement for a paper-making machine

Headbox assembly for a papermaking machine provided with a wire screen through which water from wet paper stock drains, the assembly including a headbox having a discharge nozzle for a jet of the paper stock, at least one forward and one rearward wedge member as viewed in feed direction of the stock jet from the discharge nozzle, the wedge member underlying the headbox and having respective wedge surfaces of different inclination, respective base members pivotally supporting the headbox and supportingly engaged by the wedge members respectively, a threaded spindle whereon the wedge members are mounted in common, the spindle being actuable for adjusting the position of the wedges forward and rearward of the stock feed direction and accordingly of the headbox whereby the discharge nozzle thereof is adjustable relative to the wire screen of the machine, and guide stop means engaging with the headbox as a brace for adjusting forces applied thereto.

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Heidenheim-Schnaitheim, Germany

Karl Wolf