Abstract: A slice lip control mechanism for the slice lip of a head box of a paper making machine. The control mechanism has a linear actuator, a spindle extending from the actuator and a link on the lip to attach to the spindle. Movement of the actuator is thus transmitted to the lip, through the spindle, to deform the lip locally to control a head box outlet orifice whose upper edge is defined by the slice lip. The spindle includes a pressure transducer whereby the load applied to the lip by the actuator that communications with the pressure transducer through the spindle can be assessed and the lip's position calculated.

Abstract: A first flexible vessel of a first cross section communicates with the rod and a second flexible vessel of a second cross section, different from the first cross section communicates with the first vessel. A substantially incompressible fluid is contained in the first and second vessels. Movement of a heated rod against the first expansible vessel moves liquid to the second expansible vessel, the differing cross section ensuring that the longitudinal movement of the second vessel is different from that of the rod.

Abstract: A control mechanism for a lip of a headbox slice. A first vessel contains a substantially incompressible liquid. The temperature of the incompressible liquid can be varied. An expansible member communicates with the first vessel and is also full of a substantially incompressible liquid. Thus increasing the temperature of the incompressible liquid in the first vessel expands liquid from the first vessel towards the expansible member to expand that member.

Abstract: A coupling to attach the lip of a head box on a paper making machine to the head box, the coupling comprises a body to be attached to an adjuster extending from an actuator. The body is attached to the head box to permit movement of the body relative to the head box, under the influence of the actuator. The body has a recess adapted to receive the lip. There is a second recess, generally perpendicular to the lip-receiving recess.The lip received in the first recess is pivotally clamped against the head box.

Abstract: A steam distributor for applying steam to a paper sheet moving beneath it and spaced from the distributor. The distributor has a leading edge and a trailing edge relative to the sheet movement. There is a header for steam extending along the leading edge. At least one opening formed in the header enables steam to be directed towards the sheet. The steam so directed forms a curtain to eliminate air entrained by the sheet.

Abstract: A steam distributor to apply steam to a paper sheet moving beneath it. The distributor has a steam supply header. A chamber receives steam from the header. There are outlets in the chamber whereby steam is passed to the paper sheet. Pipes communicate the header with the chamber and there is an outlet for each pipe in the chamber and an inlet for each pipe to allow steam into the paper from the header. A valve member extends to an open end of the pipe and co-operates with the open end to control the flow of steam through the open end. The valve member can be moved towards and away from the open end of the pipe.

Abstract: A steam distribution apparatus has a first header having an inlet for steam and a plurality of discrete outlets for steam arranged along the header. The outlets increase in size with distance from the inlet. A first chamber surrounds the first header to receive steam from the outlets in the first header. There are first, relatively large outlets in the first chamber. The relative positions of the first header and the first chamber ensure that steam leaving the plurality of outlets in the first header impinges on the interior of the chamber and must travel around the chamber to reach the first outlets in the first chamber. A second chamber communicates with the first outlets from the first chamber. There are outlets in the second chamber. A shrouding is positionable above a paper web and communicates with the elongate outlets in said second chamber. The apparatus permits uniform steam flow along the entire length of the distributor.

Abstract: Apparatus to supply steam to a paper sheet moving beneath it. The apparatus has a leading edge and a trailing edge relative to sheet direction. It has a header and there is a supply of steam to the header. A chamber is positioned adjacent to the header. Steam can be transferred from the header to the chamber. A heating zone is defined beneath the chamber to be generally adjacent to the paper sheet when the apparatus is in use. Outlets in the chamber permit steam to pass from the chamber to the heating zone. Exhaust manifolds positioned adjacent to the leading edge and the trailing edge of the apparatus permit excess steam and vapor to be drawn away from the heating zone.

Abstract: Apparatus to supply steam to a paper sheet that passes by the apparatus from a leading edge to a trailing edge of the apparatus. The apparatus is adapted to be positioned adjacent the nip of two rolls and comprises a first header for steam and a first chamber to receive steam from the first header. Passages for steam are formed between the first header and the first chamber. An outlet in the first chamber permits steam to be forced against the paper sheet adjacent the leading edge of the apparatus to form a steam curtain to reduce the amount of air drawn under the apparatus by the paper sheet. A second chamber receives steam from the first header. There are passages for steam between the first header and the second chamber and outlets in the second chamber so that steam may be forced against the paper sheet to heat the sheet. The flow of steam along the length of the apparatus can be controlled.

Abstract: Apparatus to supply steam to a paper sheet passing beneath it. The apparatus has a leading edge and a trailing edge relative to the sheet direction and comprises at least two headers, a first header being adjacent to the leading edge. There is a steam supply system means for the headers. A profiling chamber is formed between the headers and baffles which divides the profiling chamber into compartments. There is provision for a controlled supply of steam to each compartment. Outlets in the profiling chamber permit steam to be projected towards the sheet from the compartments. A further chamber is formed adjacent to the leading edge and steam can be supplied to the chamber. Outlets in the further chamber permit steam to be directed towards the sheet to form a steam curtain at the leading edge of the apparatus to prevent air being drawn under the apparatus by the sheet.

Abstract: A steam distribution apparatus includes a first header having an inlet for steam and a plurality of discrete outlets for steam arranged along the header. The outlets increase in size with distance from the inlet. A first chamber surrounds the first header to receive steam from the outlets in the first header. There are first, relatively large outlets in the first chamber. The relative positions of the first header and the first chamber ensure that steam leaving the plurality of outlets in the first header impinges on the interior of the chamber and must travel around the chamber to reach the first outlets in the first chamber. A second chamber communicates with the first outlets from the first chamber. There are outlets in the second chamber. A shrouding is positionable above a paper web and communicates with the elongate outlets in said second chamber. The apparatus permits uniform steam flow along the entire length of the distributor.

Abstract: An apparatus and method are described for separating heavy impurities from feed stock. Feed stock is introduced into a first classifying zone defined by a chamber, usually circular in cross-section. The feed stock is normally liquid being made up of stock suspensions of up to 10% A.D. (air dried) consistency. This feed stock contains heavy impurities in the form of trash such as rocks, sand and the like. The feed stock enters the first zone tangentially where an outer vortex flow is generated. Where the apparatus is intended to pass (and not reject) knots in the feed stock, dilution water may be introduced tangentially in the same direction as the feed stock to control knot rejection. The impurities are subjected to a primary classifying action here, and clarified stock is extracted as central, upwardly rising vortex flow. The impurities form an outer layer which passes from the bottom of the first zone into a second zone.

Abstract: A steam supply apparatus. At least a first and second pipe are located in spaced apart, side by side relationship. A cover member extends longitudinally between the pipes and is secured to them. A bottom wall is spaced below the cover member and extends longitudinally of the pipes and is secured to them. The pipes, cover member and bottom wall form between them a steam chamber. End members close the steam chamber near opposite ends of the pipes. There are steam outlet means in the bottom wall that extend substantially the length of the chamber between the pipes. There are means for supplying steam to the pipes. Each pipe has a plurality of apertures arranged longitudinally of the pipe to maintain the interior of the steam pipes in communication with the steam chamber. The pipes are adapted to extend across a surface against which steam is to be directed through the outlet means and to support the steam chamber above the surface.

Abstract: A steam supply apparatus includes at least two pipes located in spaced apart, side by side relationship, and a cover member extending across the pipes and secured thereto. End members are secured to the respective opposite ends of the pipes, and a pair of baffles between each pair of pipes are secured thereto in a substantially V-shaped configuration with a slot between adjacent ends of the baffles at the base of the V-shape, the base of the V-shape being directed towards the cover member. Steam is supplied to the pipes, and each pipe has a series of apertures communicating the interior of the pipe with the space between the pipes, the cover member and the baffles.