Abstract: A creping machine comprising a driven rotary carrier roll; a stationary blade assembly which is positioned to press sheet material into entrained engagement with the circumferential surface of the carrier roll and which includes a resilient spring blade projecting downstream from the immediately adjacent portion of the assembly; and a stationary retarder extending downstream from the circumferential surface of the carrier roll adjacent to the projecting resilient spring blade and over which the sheet material passes on disengagement from the said surface; the retarder having a transverse upstream facing wall extending downwardly from its upper surface whereby a cavity constituting a creping zone is defined upstream of the said wall and beneath the projecting resilient spring blade. Operation of the machine, which can in some cases be effected without a projecting blade causes a true creping action at wall.

Abstract: A system for producing a bulky, soft and absorbent paper web wherein the web is creped from a first creping surface, passes through a nip formed between a dewatering felt and imprinting fabric of a specified character and is applied to and creped from a second creping surface.

Abstract: A doctor assembly for doctoring a cylinder (12) includes a doctor blade (17) which is retained at its rear end in a blade holder constituted by a multiplicity of adjacent, narrow pivot plates (15) which are individually pivotable about a shaft (14) that is fixed below a rigid support member (10) that is connected to a main support bar (11), and an inflatable bag (28) is disposed between the pivot plates and the rigid support member (10) so as to enable the pivot plates to pivot relative to one another toward and away from the support member (10) and enable the doctor blade attached thereto to conform to the exact shape of the cylinder (12).

Abstract: An improved doctoring knife for drum dryers and flakers of the type in which a product is deposited on a rotating drum and removed by action of the doctoring knife against the drum is disclosed. The improved doctoring knife is comprised of a series of knife blocks each having a cutting edge wherein the knife blocks are positioned adjacent to one another so that when the cutting edge of the knife block contacts the drum its bottom face will be in a plane substantially tangent to the line defined when the cutting edge contacts the drum. When a cutting edge is damaged the knife block containing the damaged edge can be removed and reground while undamaged knife blocks remain in position.

Abstract: An improved method of making imprinted paper on a Yankee dryer type papermaking machine wherein a substantial length portion of a loop of imprinting fabric post-wraps an arcuate sector of the Yankee dryer immediately after a pressure roll-Yankee dryer nip, and by being tensioned imposes radially inwardly acting compressive loading on a corresponding length portion of the web disposed between the fabric and the dryer surface. This enables, for instance, improved Yankee dryer speed, improved web tension and edge control of the paper when creped off the Yankee dryer, reduced use of adhesive on the Yankee dryer surface, improved fiber transfer efficiency, and reduced energy consumption per ton of paper made.

Abstract: A doctor for a papermaking machine comprising a blade holder carrying a doctor blade and a pressure plate bearing against the doctor blade, the pressure plate and/or the doctor blade being formed of a multiplicity of short contiguous sections, with or without links connecting the sections together.

Abstract: A creping doctor in which a long, thin blade is applied to a roll surface at an angle to the tangent at the line of contact such that the blade presents a wide surface to the product being removed from the roll. A preferred angle is approximately normal to the surface, so that the roll surface tangent and the wide blade surface receiving the product make an angle ranging between acute and obtuse. A bladeholder provides both coarse and fine compliance of the blade to roll surface contour variations. Blades incorporating resilient means distributed along the back edge for cooperating with the bladeholder are also described.

Abstract: The described apparatus has utility as a doctor on a paper machine, as a drying element in an aircap dryer and as a sealing element in such a dryer. It involves a foot portion having an outer surface generally conforming to the curvature of the cylinder surface on which it is used. It is resiliently supported in close juxtaposition to the cylinder surface so that a gap diminishing in thickness towards one longitudinal edge of the foot portion is provided. At least two rows of nozzles communicate through the foot portion in order to project pressurized air into the gap. Each nozzle is angled relative to three orthogonal planes, one of which is tangent to the cylinder surface at the point where the nozzle axis meets the surface, another of which is parallel to the longitudinal edge of the foot portion. The flow from the nozzles is such as to support the foot portion and to seal the support flow from any disorganized flows.

Abstract: Continuously running web material is transferred from a dryer, or the like, to a proximate calender, or the like, along flutter suppressing foils. The web may be calendered in a nip between a rotary calender roll and a reel drum with which a reel core is in nip relation for winding the web on the core. The calender may comprise a single roll or a plurality of rolls. A split torque arrangement is provided for the reel drum and the reel core. Especially useful for handling creped tissue paper web.

Abstract: A doctor comprising a support, a blade holder including a tang, disposed adjacent the support, a doctor blade supported in the blade holder, the support and the tang having opposed flat surfaces, a series of spacers spaced along the length of the doctor, each of which is adjustable to vary the spacing between the said flat surfaces while maintaining them parallel, and means for securing each spacer in adjusted position.

Abstract: A rolling device or roller mill having a controlled-deflection roll possessing a stationary roll support or carrier mounted in a frame of the rolling mill. A tubular roll shell is rotatable about the roll support and bears thereon by means of at least one bearing or support element. The roll shell is provided at its ends with guide members which are rotatably mounted in the roll shell and which are guided on the roll support in the direction of the pressing or disengaging movement of the roll shell. The controlled-deflection roll is equipped with a scraper device having a scraper blade which, during operation, is in contact with the outer surface of the roll shell, the scraper device being rotatably mounted on the frame. At least one of the guide members has a disengaging or lift-off element which, when the roll shell performs a disengaging or lift-off movement from the operative position, abuts a part of the blade support or carrier and raises the blade off the surface of the roll shell.

Abstract: A controlled-deflection roll having a stationary roll support or carrier and a tubular roll shell rotatable about the stationary roll support. The tubular roll shell bears upon the roll support or carrier through the intermediary of at least one bearing or support element. The roll shell is provided at its ends with guide members which are rotatably mounted in the roll shell and which are guided on the roll support in the direction of the pressing or contact movement or the disengaging or lift-off movement of the roll shell. The controlled-deflection roll is provided with a scraper device equipped with a scraper blade which, during operation, is in contact with the surface of the roll shell, and the scraper device is secured to the guide members.

Abstract: A continuously advancing tissue paper web is separated from a Yankee dryer roll and creper, and then received and transported on an endless fabric conveyor and embossing belt travelling toward and over a reel drum. At the reeling station the web is threaded onto a reel spool and wound into a parent roll pressing against the conveyor and embossing belt running over the reel drum and thereby embossing the web in the roll/drum nip. Means are provided for automatically air threading the web onto the reel spool. For higher bulk tissue creped sheet, additional dry embossing may be effected while the sheet is being transported by the conveyor belt.

Abstract: A pickup and press section of a paper machine includes a suction pickup roll and felt which transfers a web from a wire, a first suction press roll and felt cooperating with the suction pickup roll and felt to define therewith a first press nip to which the web is transferred. A second suction press roll and a lower press roll situated therebeneath as well as a felt which cooperates with the latter lower press roll define a second press nip to which the web travels subsequent to the first press nip, the felt for the latter lower roll of the second press nip and for the first suction press roll being constituted by a single felt common to both of the latter rolls and supporting the web while it travels from the first to the second press nip.

Abstract: A system for use in papermaking including at least two members one of which is movable relative to the other and in frictional engagement therewith wherein at least one of the members comprises an elongated flexible composite including a plurality of ceramic segments, each segment having at least two opposite surfaces that are flat and parallel. The segments are aligned in stacked relationship with their flat faces in abutting face-to-face relation and forced toward each other in the direction of their composite length with a force which is sufficient to maintain the segments in compression when subjected to conditions of thermal change and/or flexing of the member during use. The ceramic member is provided with a smooth elongated working surface which defines an area of contact between the members of the system. Systems including a papermaking foil or suction device in a papermaking process, or a doctor blade are disclosed. A method for making the ceramic member is disclosed.

Abstract: An elongated flexible member including a plurality of ceramic segments, each segment having at least two opposite surfaces that are flat and parallel. The segments are aligned in stacked relationship with their flat faces in abutting face-to-face relation and forced toward each other in the direction of their composite length with a force which is sufficient to maintain the segments in compression when subjected to conditions of thermal change and/or flexing of the member during use. A method for making the ceramic member is disclosed.