Abstract: A method of and apparatus for applying coating liquid to a web of paper traveling over a web supporting surface at speeds of 3,000, 4,000 and more feet per minute to produce a coated web free of streaking and other imperfections comprises apparatus for and the sequential steps of distributing coating liquid in a turbulent state over the supported web through a limited application zone within a very short dwell time of the turbulent liquid on the web; subjecting the coating liquid on the supported web to an initial doctoring by means of a primary doctor blade biased under pressure against the coated web at the rear edge of the application zone to form on the web downstream from the zone a relatively quiescent layer of coating liquid having a wet film thickness sufficiently in excess of the final wet film thickness to accommodate a subsequent final wet film doctoring of the coating liquid on the web; and, a a location downstream and isolated from the application zone, subjecting the relatively quiescent layer o

Abstract: A filled supercalender roll is characterized by a plurality of resin impregnated discs that are carried side-by-side on a shaft and form a homogeneous roll body. To make the supercalender roll, a web of woven or nonwoven fibrous material is immersed in and carried through a vat of thermosetting resin to saturate the web with the resin. The resin saturated web is then transported through an oven to partially cure the resin to the B stage, after which the web is cut into a plurality of the discs. The discs are placed side-by-side on the shaft and a collapsible oven is assembled around the discs. The discs are then axially compressed while being heated within the oven to fully cure the resin to the C stage, during which time the collapsible oven decreases in length in accordance with a decrease in the axial length of the axially compressed discs on the shaft as the resin cures.

Abstract: A paper coating system is characterized by an upstream dip roll applicator that applies an excess layer of liquid coating material onto a surface of a paper web, and an improved downstream doctor assembly for metering and leveling the coating on the web. The doctor assembly includes a doctor blade having a tip extended against and across the web and a shear plate, upstream of the blade, having a surfaces extending across and defining a gap with the web. An elongate chamber defined between the shear plate and blade extends across the web, and excess coating removed from the web by the blade flows into the chamber. Coating is drained from and uniformly along a lower end of the chamber at a rate to maintain an eddy current pool of coating in an upper end of the chamber immediately upstream of the blade/web nip, but to prevent formation of a liquid seal in the gap.

Abstract: A paper tailing device accommodates automatic transfer of an initial portion of a paper web across a gap in a paper making machine during guiding of the initial portion through the machine. The paper tailing device comprises a pair of brackets, one on each side of the gap and each carrying a pair of sheaves over which carrier ropes extend. During guiding of the initial portion of the web through the machine, a side edge of the web is gripped between the carrier ropes, and at the sheaves, the ropes define an outgoing nip on one side of the gap and an incoming nip on the opposite side. To transfer the leading end of the web across the gap, the brackets are moved close together in the gap to place the nips in close facing relationship, so that as the leading end of the web exits the outgoing nip it is automatically introduced into the incoming nip.

Abstract: A coater for applying liquid coating material onto a paper web carried across an upstream dip roll applicator that applies an excess layer of coating onto the surface of the web, is cahracterized by an improved downstream doctor assembly for metering and leveling the coating of the web. The doctor assembly includes a doctor blade having a top extended agianst and across the web, and a shear plate just upstream of the blade. The shear plate has a surface facing toward but spaced from the web and a ramp on the surface extending toward the web. As the coating layer on the web contacts the doctor blade, excess coating removed from the web by the blade bounces back off of the blade, flows across the shear plate surface and is deflected by the ramp against the web to rewet the excess coating layer on the web before it reaches the blade.

Abstract: A tamper resistant end closure for a container includes a base for closing an end of the container and a rotor pivotally connected to the base by a hub in the form of a hollow stem extended through a center opening in the base. An annular flange at the lower end of the stem retainably engages a lower surface of the base, and a plug is driven into and bonded within the stem, after the rotor is connected to the base, to inhibit removal of the rotor by preventing radially inward movement of the flange. The rotor and plug may initially be integral, such that an end of the plug is attached by a frangible web to the rotor, at an end of and in alignment with the passage through the stem. The frangible web is broken when the plug is driven into the stem.

Abstract: Apparatus for applying adhesive onto flutes of single facers of corrugated media, so that the single facers may be adhered together and to a facing to form a composite web, comprises a plurality of adhesive applicator rolls, each for applying adhesive to the flutes of an associated one of the single facers. The actual speed of travel of the single facers passing across the applicator roll peripheries is sensed, and the rate of rotation of each roll is independently and accurately controlled, in accordance with the sensed speed, to apply a desired amount of adhesive onto selected areas of the flutes. The independent accurate control over applicator roll speeds enables minimum amounts of adhesive to be applied onto the flutes of the individual single spacers, as determined by their configurations and consistencies, while still ensuring proper adhesive of the single facers one to the other ad to the facing.

Abstract: An improved doctor blade, for use at a downstream end of a pressurized coating material application zone of a paper coater, has a tip portion of a limited length and first thickness and a major body portion of a second and increased thickness. The increased thickness of the major body portion enables the doctor blade to resist flexure caused by variations in pressure of the coating material in the zone, so that the blade tip more uniformly meters and levels coating on a paper web. Also contemplated is an arrangement for clamping the blade at the downstream end of the application zone, in a manner to minimize flexure of the blade in response to variations in pressure of the coating material in the zone.

Abstract: Apparatus for separating two rolls of paper which are interconnected end-to-end, is characterized by a pair of arms pivotally connected at their upper ends and carrying inwardly facing wedges at their lower ends. The arms are advantageously mounted on wheels to facilitate transport of the same, and a hydraulic cylinder extends between the arms intermediate the pivotal connection and wedges. To separate two interconnected paper rolls lying on a floor, the apparatus is positioned to straddle the rolls with inner edges of the wedges aligned on opposite sides of the rolls with the juncture therebetween, whereupon the hydraulic cylinder is actuated to pull the arms together and move the wedges into the juncture to forcefully separate the rolls one from the other.

Abstract: Apparatus for separating folded two-on cartons is characterized by a carton supply station for advancing cartons seriatim to a separating station. At the separating station, opposite edges of each carton are gripped and first moved away from each other to pull the two-on carton apart into two separate cartons, and then moved toward each other to bring the separated cartons back together. The separated cartons are then conveyed out of the separating station while the supply station simultaneously advances the next successive two-on carton to the separating station.

Abstract: An improved paper coating applicator has a body portion defined by forward and rearward relatively movable walls defining a chamber therebetween with an elongate opening thereto positionable generally below, adjacent to and transversely of a paper web, the chamber receiving coating liquid and directing the same generally upwardly through the opening and onto the web. According to one aspect of the improvement, the chamber and a distribution header for introducing coating material therein are of a design enhancing a very uniform application of coating material onto the web. In another aspect, a unique seal structure provides a secure, fluid tight connection between the front and rear walls.

Abstract: Apparatus for opening a folded rectangular corrugated carton, of a type having score lines between panels thereof, is characterized by a pair of V-shaped channels for receiving the folded carton therebetween, such that score lines along opposite side edges of the carton are positioned within the channels. A motor drives the channels together, so that as pressure is applied to the carton the panels are folded about the panel scores to open the carton.

Abstract: A method and apparatus for applying a film of liquid pigmented coating material to a moving web of paper at, and between, a low limit of two pounds per ream and a high limit of fifteen pounds per ream. The method and apparatus utilize a reservoir of liquid coating material established between a forward liquid coating material seal and a rearward pneumatically loaded and clamped doctor blade spaced a small distance of a few inches or less from the liquid seal. The reservoir is pressurized in the range of 7 to 150 inches of water so that the coating material is applied under pressure to the moving web and then almost instantaneously wiped by the doctor blade. The reservoir is formed by two relatively movable, sealed members which may be opened for easy cleaning, and may have one or more internal coating material distribution headers at its end opposite the web to uniformly distribute the coating material.

Abstract: An improved edge seal assembly for an applicator for applying a coating liquid to a moving web of paper, wherein the applicator is of the type having a chamber for receiving the coating liquid and an elongate opening thereto for directing the liquid onto the web, the opening being formed between a front wall of the chamber and a doctor blade extending from the rear side of the opening to against the web, is characterized by a seal element sealed with the front wall and doctor blade in an end space therebetween, and a deckle beneath the seal element for closing off a selected portion of the side end of the opening. The seal element and the deckle are slidingly interconnected and can be independently adjusted laterally with respect to the opening.

Abstract: A die cut one piece interlocking outfold container has interlocking of inside and outside flaps. A cover length flap of the container folds outside of a body length flap, and cover width flaps fold inside of body width flaps. The particular configuration results in the container having plural thickness front, back and side walls, which increases the stacking strength of the container.

Abstract: An improved method and apparatus for applying a film of coating material on a moving web of paper carried through an application zone, utilize a reservoir of liquid coating material established under pressure between liquid seals at forward and rearward ends of the zone, and a doctor blade loaded against the web rearwardly of the rearward liquid seal. The reservoir is formed by forward and rearward relatively movable, sealed members, the upper edges of which define gaps with the paper web and doctor blade, respectively, in which gaps the liquid seals are formed. Coating material is flowed under pressure and in excess into the application zone to enable a pressurized area of coating material to be developed therein against the web and immediately upstream of the doctor blade, with the excess of coating material overflowing from the zone through the gaps to form the liquid seals. The provision of two overflow routes for excess coating material aids in skipless application of coating on the web.

Abstract: An applicator for applying a coating liquid to a moving web of paper carried through an application zone, wherein the applicator has a chamber for receiving the coating liquid and an opening thereto for directing the liquid into an application zone and onto the web, the zone being established between a front wall of the chamber and a doctor blade extending from a rear side of the opening across and against the web, is characterized by a readily removable and replaceable orifice plate on the front wall, which extends toward and closely spaced from the web to define with the web a gap through which coating liquid in the zone flows to form a liquid seal. Because the orifice plate may readily be removed and replaced, orifice plates of different heights may be used with the applicator, so that simply by selecting a particular orifice plate for use, the gap in which the liquid seal is established may be made to have a predetermined size.

Abstract: Apparatus for applying a coating liquid to a moving web of paper carried through an application zone is characterized by a system at each side end of the zone for recirculating coating liquid thereat. In use of such an applicator coating liquid at the side ends of the zone tends to stagnate, and the recirculating system eliminates coating buildup in the side ends.

Abstract: An edge dam assembly for an applicator for applying a film of coating material on a moving web of paper carried through an application zone, is characterized by a seal element at each side end of the zone. To prevent leakage of coating liquid past the seal element, air is introduced through the element and into the side end of the zone adjacent to the element. The air forms an air barrier pocket at the side end of the zone, which is void of coating liquid, whereby coating liquid is maintained in the zone inwardly of the seal elements.

Abstract: An edge dam for an applicator for applying a film of coating liquid to a moving web of paper carried through an application zone, is characterized by a seal element at each side end of the zone for substantially sealing the side end of the zone, thereby to impede a flow of coating material out of the zone. At least one orifice is formed through the seal element outwardly of the zone, and the orifice is connected with a supply of water under pressure for directing a flow of water against the peripheral edge of the web moving therepast, thereby to wet the edge and flush the same of any coating material seeping past the element. In consequence, edge stickers and coating liquid pickup on the web edge are substantially eliminated.