Abstract: A system and process for producing a tubular multilaminate film having a plurality of bonded resin sheets. At least one of the sheets is formed from an annular resin stream of spirally extruded resin and at least one of the sheets is formed from an annular resin stream of non-spirally extruded resin.

Abstract: A dispenser having a dispensing aperture accommodates two coreless rolls of sheet material. The tail end of one of the rolls is attached to the lead end of the other of the rolls to provide for sequential dispensing of the rolls.

Abstract: A center-pull dispenser housing has a top and a support, the support defining a dispensing aperture. A coreless roll of sheet material is disposed on the support with the lead end of the sheet material extending from the coreless roll center through the dispensing aperture. The coreless roll has either channels or projections formed at the ends thereof which cooperate with stabilizing elements on the housing to resist movement of the coreless roll and collapse of the coreless roll as it nears depletion.

Abstract: A system for dispensing individual sheet material segments from a roll of sheet material. The sheet material is separated into individual segments by perforated tear lines which are shaped to incrementally pass through a nip formed by nip rollers due to a pulling force exerted on an end-most segment by a user. A drag force opposed to the pulling force is exerted on the sheet material by the nip rollers so that the tear line tears as it passes through the nip. Tearing along the perforated tear line is not completed until a portion of an adjacent segment is presented for pulling by a subsequent user.

Abstract: An apparatus is disclosed that engages a lid to a container by the formation of interlocking waves of lid material and container material. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container, and also to minimize the force required to peel the lid from the container. An unheated clamp head of the apparatus is used to clamp the lid structure immediately adjacent a heated seal head used to form the interlocking wave structure about the inside rim of the container, so as to prevent any melted portions of the container or lid from flowing to or toward the outside rim of the container, so as to prevent the formation of similar interlocking waves about the outside rim of the container.

Abstract: A method is disclosed wherein a lid is engaged to a container by the formation of interlocking waves of lid material and container meterial about the interior rim of the container. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container, and also to minimize the force required to peel the lid from the container. An unheated clamp head is used to clamp the lid structure immediately adjacent a heated seal head used to form the interlocking wave structure about the inside rim of the container. The unheated clamp head prevents any melted portions of the containter or lid from flowing to or towards the outside rim of the container. Interlocking waves of material are thereby prevented from forming about the exterior rim of the container.

Abstract: A dispenser apparatus for serially dispensing products such as paper napkins from a stack of such products. The dispenser apparatus includes a housing having a back wall which is curved and has a radius of curvature generally corresponding to the radius of curvature of the stack.

Abstract: The barrier properties of crystalline polyolefin film can be improved substantially by incorporating a precise amount of a partially incompatible wax into the polyolefin. When the polyolefin is polypropylene or polybutylene, the wax is preferably a paraffin wax. The precise amount of wax, which produces optimum improvement in barrier properties, lies in the range of about 3 to 10 percent based on the weight of the polyolefin. The range in which excellent results are obtained can be broadened by contacting the film with a cooling medium immediately after it is extruded. The film may be annealed to further improve the barrier properties.

Abstract: A roll towel dispenser is attached to a folded towel dispenser housing by removing a cover from the housing, replacing the cover with an adaptor plate, inserting the roll towel dispenser into an aperture defined by the housing and adaptor plate, and supporting the roll towel dispenser on a partition in the housing interior.

Abstract: Apparatus for stabilizing and reducing neck-in and edge thickness of a hot-plastic web including a pair of nozzle assemblies located at spaced edges of the web. Each nozzle assembly includes a pair of elongated nozzle elements which direct a pair of gaseous flows along opposed sides of the web transverse to the direction of movement of the web and toward an edge thereof.

Abstract: The barrier properties of a coextruded film having a surface layer comprising a crystalline polyolefin can be improved substantially by incorporating a precise amount of a partially incompatible wax into the polyolefin. The film has an interior layer comprising a polymer that prevents migration of the wax to the other surface of the film so that wax does not interfere with the printability or heat sealability of the other surface. The wax-containing polyolefin layer also protects the interior layer from adverse effects of moisture, such as when the interior layer comprises EVOH. An interior layer of EVOH may be sandwiched between wax-containing polyolefin layers to fully protect it from moisture.

Abstract: The barrier properties, particularly water vapor transmission rate, of compositions comprising a stryene-butadiene polymer can be improved substantially by adding from about 0.5 to 10 percent of a polyethylene type wax to the composition.

Abstract: A dispenser for folded sheet products including a housing accommodating a stack of the products, a dispenser element disposed at the lower end of the housing and having an opening through which the products are serially dispensed, and a blocking member which obstructs the interior of the housing above the stack after the stack has shortened to a predetermined degree to prevent an upward force exerted against the stack from moving the stack from dispensing position.

Abstract: A dispenser apparatus for serially dispensing products such as paper napkins from a stack of such products. The dispenser apparatus includes a housing having a back wall which is curved and has a radius of curvature generally corresponding to the radius of curvature of the stack.

Abstract: An apparatus and method for serially dispensing discrete folded sheet products from a stack through an opening in a nose piece. The nose piece includes two pairs of contact elements disposed at different planes whereby the napkin prior to dispensing is subjected to two sequential bending steps with the bends being formed at right angles to one another. During the bending steps a flap terminal end is unsupported by the nose piece over the central portion of the flap terminal end and the bending of the folded sheet product urges the flap terminal end outwardly of the rest of the product to facilitate grasping and removal.

Abstract: A machinable flexible packaging material capable of forming a seal that is reclosable at ambient temperature is made by applying a tacky adhesive and a thin skin layer onto a substrate, such as polyester film. Being thin, the skin layer fractures when the seal is opened, thereby allowing the adhesive to form a resealable interface at the seal area. However, since the adhesive is encapsulated in the material initially, the material may be used like other packaging materials in form, fill and seal machines.

Abstract: A dispenser for serially dispensing folded sheet products from a stack of folded sheet products, includes a housing, a support member movable mounted within the housing, and a follower for urging the stack in the direction of a dispenser element included in the support member. The apparatus includes mechanism for engaging the follower and retaining it at a predetermined location relative to the support member when the support member is in open condition and which is disengaged from the follower when the support member moves to its closed position to compensate for any overfilling of the dispenser.