Abstract: Spunbonded nonwoven webs having excellent properties, particularly softness, can be made from linear low density polyethylene having a critical combination of certain key properties. These properties are percent crystallinity, cone die melt flow, die swell, relation of die swell to melt index, and polymer uniformity. The polyethylene is extruded through a spinneret at a temperature between about 185.degree. and 215.degree. C. and drawn through an air gun to form the spunbonded web.
Abstract: A method and apparatus for cleaning and conditioning a fabric in which pressurized fluid is directed into a restricted and diminishing passageway formed by the fabric and a member forming an extended nip therewith so that the fluid is forced through the fabric.
Abstract: This invention is a process for recovering sodium hydroxide directly from black liquor. The process involves pyrolyzing the black liquor in the absence of oxygen to produce a product containing sodium carbide, and hydrolyzing the sodium carbide to form sodium hydroxide. The pyrolysis is carried out at about 4000.degree. F. using radiant energy.
Abstract: A system for handling discrete sheets including a nozzle for simultaneously lifting the sheet from a surface by suction and propelling the sheet in a direction generally corresponding to the plane of the sheet.
Abstract: A collapsible container comprising two pairs of opposed walls, bottom flaps connected to the walls forming a container bottom, and lock panels connected to two of the bottom flaps and projecting into the interior of the container in abutting engagement. The container also includes a collapsible frame formed of pivotally interconnected rigid elements secured to the walls of the container and movable with the walls into a collapsed condition.
Abstract: This invention is an improved heatseal die that forms superior airtight seals. The die has opposed die faces, with one die face having longitudinal lands and the other die face having grooves for receiving the lands. The lands are truncated and the depth of the grooves is greater than the height of the lands. As a result, the force applied by the lands and grooves is applied entirely as a shearing force, which forms the superior heatseals.
Abstract: A system for securing the unaffixed tail of a roll product to a convolution thereof underlying the tail with a flexible sealing element wherein a predetermined physical characteristic of the roll product is sensed and an appropriate sealing element such as a label is delivered to the roll product and applied thereto.
Abstract: A system for wrapping a plurality of objects with an adhesive tape including yieldable support flaps for applying the tape and delivery means for periodically delivering a predetermined length tape to the flaps.
Abstract: A multi-cell container having two pairs of bottom flaps and divider panels connected to the flaps and extending into the container interior to form the cells. The divider panels connected to one pair of opposed walls are positioned in slits formed in the divider panels connected to the other pair of opposed walls. Hand hold flaps engage divider panels and exert an upward force on them when the container is carried to provide bottom strength.
Abstract: A paperboard baking and shipping tray including channel defining members at opposed ends and locking panels positioned therein with only a single surface of the blank from which the tray is formed being exposed to the tray interior.
Abstract: A system of treating web material wherein the web is transported within a differential relative velocity nip defined by a web support surface and a pick-up member having voids therein and having a relative velocity differing from that of the support surface at the nip location. Substantially simultaneously with the web treatment the web is applied to the pick-up member with the web impressed into the voids to lock the web against movement relative to the pick-up member.
Abstract: The softness of paper as a function of the number of bonding sites per unit area of the paper is determined by directing ultrasonic energy toward the paper and determining the magnitude of the portion of reflected energy.
Abstract: The invention is an improved lime slaker in which the lime is combined with the slaking liquor in a vertical conduit which extends below the level of the liquor in the slaker vessel. The slaking liquor is introduced into the conduit at a high velocity tangential to the interior surface of the conduit to flush the lime into the vessel. The slaker includes a vertical vent pipe that extends through the bottom of the vessel. In a preferred embodiment, the inlet of the vent pipe is surrounded by an entrainment separator. Removable covers permit convenient access for inspection and cleaning of the conduit and the vent pipe.
Abstract: A method for conveying a web using inner and outer pairs of elongated side jet nozzles employing the Coanda effect to propel the web while preventing undue distortion or folding thereof. Conveying is accomplished by flowing pressurized air through a plurality of apertures formed in the nozzles and attaching air flow to Coanda flow attachment surfaces slanting away from the apertures.
Abstract: The stiffness and deadfold properties of laminates used to make toothpaste tubes are improved by including a layer of high density polyethylene as one of the layers of the laminate. The use of high density polyethylene obviates the need to use a layer of paper or thick foil to provide stiffness and deadfold. The laminates containing high density polyethylene also have excellent strength and other properties which make them especially suitable for making tubes used to package toothpaste or other substances.