Abstract: A lapping assembly is described wherein a lapping process is performed to provide a flat headbox apron floor. The lapping assembly includes an eight-legged fly-style plate and a spring loaded floating driver. The lapping assembly and operation consists of attaching a spring loaded floating driver to a machine spindle of a milling machine. A lapping fly wheel is attached to the spring loaded floating driver. A coated abrasive strip with desired grit size to achieve the desired finished results is clamped in place on the lapping fly wheel. The machine spindle is rotated, thereby rotating the spring loaded floating driver and the lapping fly wheel, and the grinding and lapping of the apron floor can begin.

Abstract: A felt turning roll for use in the dryer section of a papermaking machine has a stationary shaft extending outwardly from at least one end of a perforated roll shell. The stationary shaft extends inwardly from the end of the roll for only a short distance which is substantially less than half the length of the face width of the roll. The stationary shaft is bored to permit a source of sub-atmospheric air pressure to be applied to its exterior portion. The inner portion of the shaft has a valve, a seal near its inner end between it and the roll shell, and openings to permit the exposure of sub-atmospheric air pressure within the roll shell on either side of the seal. The use of short stationary shafts eliminates the center shaft which otherwise would extend for the length of the roll.

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.

Abstract: Apparatus for transferring a newly formed paper web from the forming fabric over a couch roll in a papermaking machine includes a transfer roll which guides a pick-up felt into nipping engagement with the paper web over the couch roll. The nip is located intermediate the circumferentially spaced ends of a vacuum zone on the surface of the couch roll. The web with the forming fabric on one side and the pick-up felt on the other side is guided onto the transfer roll surface by the forming fabric downstream of the nip and is transferred onto the pick-up felt. The transfer roll has a vacuum zone located downstream of where it is wrapped by the forming fabric. The application of pressure on the web over the couch roll prior to, and in conjunction with, the nip operates to further dewater the web as well as to facilitate its transfer to the pick-up felt.

Abstract: A method and apparatus for automatically threading a traveling web strip, such as a so-called paper tail in a papermaking machine, utilizes a doctor for doctoring the web strip from the surface of a roll. A stream of compressed air is projected against the oncoming web strip in the vicinity of the point where the doctor blade contacts the web on the roll and urges the oncoming web off the roll surface upstream of the doctor. A foil is brought into proximity with the outer surface of the web spaced over the roll to urge the strip outwardly and against a serrated knife to sever the web strip against the force of its momentum. The severed end of the web strip is then guided onto a plate for conveyance into a downstream section of the machine for further processing.

Abstract: Apparatus for controlling the oxygenation of both the bearing lubrication oil and the hydraulic oil used for actuating the roll shell support elements in a controlled deflection roll, such as used in the papermaking industry, includes a seal at either end of the controlled deflection roll which establishes a gas-impervious seal between the roll shell support and rotation bearings at either end of the roll and the interior of the roll. A source of pressurized inert gas is linked to both the interior of the roll and to the reservoir of hydraulic oil used to actuate the roll shell support shoes. This prevents oxygen from interfacing with the hydraulic oil at the only two points in the closed system where the hydraulic oil and the atmosphere would otherwise come into contact. A separate bearing oil lubrication system having its own reservoir is maintained to supply bearing lubricant to the bearings and return it to a sump while maintaining the bearing lubricant separate from the hydraulic oil.

Abstract: A forming apparatus (10) is disclosed for forming a web from stock. The apparatus (10) includes a frame (14) and a first and second plurality of guide rolls (16-26 and 30-34) rotatably connected to the frame (14). A first and second forming wire (28,36) extend respectively around the first and second plurality of guide rolls, with the first and second wires (28,36) cooperating together to define therebetween, a forming section (38) having a first and second (40,42) end. A headbox (12) is disposed adjacent to the first end (40) of the forming section (38). A suction shoe (44) is disposed adjacent to the first end (40) of the forming section for effecting an initial dewatering of the web. The suction shoe (44) has a curved surface (46) which abuts against the first wire (28) for removing a first portion of the water through the first wire (28) and a second portion of the water through the second wire ( 36).

Abstract: A guide roll apparatus is disclosed for guiding a contiguous web and web-supporting felt through a drying section of a paper machine. The apparatus includes a rotatable guide roll having an outer cylindrical surface defining a first and a second edge portion and a central portion disposed between the edge portions. The first edge portion defines a first plurality of air flow channels such that in use of the apparatus, when the web and felt are guided around the rotatable guide roll, air entrapped between the first edge portion and the felt wrapped around the first edge portion is permitted to flow through the first plurality of channels away from the felt so that fluttering of the web during guidance around the first edge portion is inhibited.

Abstract: A press drying apparatus is disclosed for removing excess water from a formed web by the simultaneous application to the web of elevated temperature and pressure for a prolonged period of time. The apparatus includes a frame and a heated roll rotatably supported by the frame. A shoe is connected to the frame with the shoe cooperating with the heated roll for defining therebetween a first nip for the passage therethrough of the web. A deflection controller is connected to the frame with the controller cooperating with the heated roll for defining therebetween a second nip. The second nip is disposed diametrically opposite to the first nip such that when the web extends through the first nip and the heated roll is heated, deflection of the heated roll towards the second nip is compensated for by the deflection controller.

Abstract: A dryer apparatus is disclosed for drying a web extending through a dryer section of a paper machine. The apparatus includes a first and a second dryer. A dryer felt movably extends around the dryers such that the web is disposed between the dryers and the felt for drying the web. A vacuum transfer roll is disposed downstream relative to the first dryer and upstream relative to the second dryer such that the web and the felt extend around the transfer roll so that the felt is disposed between the web and the transfer roll when the web and the felt move around the transfer roll. A seal device extends between the first and the second dryers for reducing a flow of air between the first and the second dryers into a pocket defined by the transfer roll and the felt extending between the dryers and the transfer roll.

Abstract: A rotatable core loading arm for loading cores in a paper winding machine is provided. The rotatable core loading arm includes a primary arm, having a member for holding the core, pivotally coupled to a roll stand of the paper winding machine, a secondary arm coupled to the roll stand, the secondary arm being secured to an actuator for moving the secondary arm and an intermediate link secured to the secondary arm for causing the primary arm to rotate as the secondary arm is moved.