Abstract: An apparatus for producing a paper tube or like tube at a constant speed by helically winding tape on a mandrel tightly with a great torsional force without creating any tape-to-tape clearance and delivering the tube formed from the mandrel axially thereof with a great force while rotating the tube without warping the mandrel. The apparatus comprises tape feeders, the mandrel and a tube rotating-drawing device for delivering the tube from the mandrel axially thereof while rotating the tube. When required, other devices can be provided for the apparatus which include a tape winding device and a tube press which are interposed between the tape feeders and the tube rotating-drawing device, and a resin-coated tape feeder, resin applicator stand, drying oven, grinding stand and tube cutter which are arranged downstream from the tube rotating-drawing device.

Abstract: The encased product of the present invention comprises an elongated flexible casing cylindrically shaped substantially along its length and having opposite end closures. A product material fills the cavity formed by the flexible casing and maintains the casing in a cylindrical shape. The cylindrical casing is formed from an elongated strip of flexible material having opposite side edges, the strip being formed into a finished tubular casing with the side edges of the strip within each casing frictionally overlapping and engaging the side edges thereof. The product is formed by continuously applying an elongated flexible ribbon to the outer cylindrical surface of a stuffing tube at a canted angle with respect to the longitudinal axis of the tube and rotating the flexible ribbon at the point where it is applied to the stuffing tube so that it will wrap around the tube in a plurality of helical revolutions to form a cylindrical casing on the tube.

Abstract: Tows of fibers are wrapped around a mandrel or a central fiber core to form a cylindrical filter. At least one belt is located in position to make essentially linear contact with the cylindrical filter, and the at least one belt is driven so as to draw the tows of fiber onto and wrap the mandrel or the central fiber core and so as to move the cylindrical filter axially relative to the mandrel or with the central fiber core.

Abstract: A composite container includes a high barrier inner liner member including a metal layer of vacuum-deposited aluminum parallel with and spaced from the longitudinal edge of a synthetic plastic base thereby to define a first web that is helically wound in edge-overlapping relation such that one longitudinal edge of the metal strip overlaps the other longitudinal edge of the metal strip by a given distance (d). The overlapping edges of the first web are hermetically joined by a heat-sealable bond between an adhesive layer covering the metal strip and the adjacent face of the first web, and a compatible heat-sealable layer on the opposite face of the web.

Abstract: The encased product of the present invention comprises an elongated flexible casing cylindrically shaped substantially along its length and having opposite end closures. A product material fills the cavity formed by the flexible casing and maintains the casing in a cylindrical shape. The cylindrical casing is formed from an elongated strip of flexible material having opposite side edges, the strip being formed into a plurality of helical revolutions with the side edges of the strip within each one of the helical revolutions frictionally overlapping and engaging the side edges within adjacent helical revolutions of the strip.

Abstract: This invention relates to combustible or semi-combustible cases intended in particular for artillery ammunition. More specifically, the invention relates to combustible cases bodies obtained by spirally winding combustible paper tapes containing nitrocellulose and having an improved mechanical resistance relative to previous combustible tape bodies, thanks to the fact that the combustible paper tapes form three distinct coaxial layers in terms of their density and structure. The case bodies according to the invention are obtained by spiral winding around a mandrel 80 a sheet 70 consisting of an uncalendered combustible paper tape 41 and six calendered combustible paper tapes 42-47 with density between 0.9 and 1.2 g/cm.sup.3, the tapes being pasted to each other according to a helical angle .alpha. such that the helical pitch P is larger than the width w1 of the tape 41 which thus forms a helix with turns which are not joined together.

Abstract: An apparatus for continuously and sequentially forming cylindrical bodies from flat sheet material includes a rotating mandrel and an array of forming belts spaced along the mandrel for receiving and winding either continuous ribbon or discrete blanks of composite material about the mandrel to form a cylindrical body such as for a container and passing the formed body along the mandrel to a heat sealing means to seal the overlapping edges of the material; the array of belts are disposed to partially surround and run in contact with the mandrel and a gap is provided in the spiral path of the belts to permit continuous feeding of sheet material to the mandrel to enable continuous operation of the forming apparatus.

Abstract: The invention relates to a method and a machine for manufacturing tubes particularly of paperboard or cardboard by helical winding of a strip or of several strips of paper. This machine comprises a stationary frame supporting a stationary winding mandrel, a system for driving in rotation the tube in formation and a movable frame supporting in particular a device for positioning and guiding the paper strips to form a web, this movable frame being connected to the stationary frame by a coupling device in rotation around a swivel pin. This machine comprises operating means for angular displacement of the said movable frame monitored by a preset value of the angle of winding of the web on the stationary mandrel.

Abstract: Apparatus for making tubular articles formed of a length of material wound in helical form with contiguous edges of successive convolutions of the material joined with one another comprises a forming section made up of a plurality of guide rollers supported by a vertical arch-type frame so as to define a generally cylindrical configuration. Feed rollers propel a strip of material in a lengthwise direction through the arch of the frame and around the support provided by the guide rollers in a helical path with edges of successive convolutions of the helix abutting one another. As the material is thus in effect coiled into helical form, a sewing machine joins contiguous edges of successive convolutions to form a continuous tubular article.

Abstract: A machine for winding conical bodies of receptacles in a helical manner around a conical, rotating shaping member using webs of waste paper is disclosed.

Abstract: A composite container capable of accommodating an internal vacuum environment within a tubular body of spirally wound paperboard or similar paperbase materials. A hermetically sealed liner is provided coextensive with the interior of the tubular body and adhesively secured thereto throughout substantially the full extent of the interior surface of the body. The liner is spirally wound, defining a spiral overlapped seam with the overlapping edge portion including an underfolded edge flap folded about a fold line prior to adhesive engagement with the overlapped edge portion. The seam fold thus formed has the interior thereof in direct communication with the paperbase body and is capable of ballooning inward, through the entire length thereof, upon generation of a vacuum atmosphere with the container. The vacuum atmosphere can thus be accommodated without affecting the structural integrity of the container.

Abstract: An apparatus for manufacturing paper pipes including two stationary drums provided on one side of a fixed mandrel and two movable drums provided on the other side of the fixed mandrel. All the four drums are adapted to transmit the driving power of a motor to belts.

Abstract: An elongated can body blank moves axially and is supported in part on a traveling interior mandrel. Traveling with the mandrel and elongated blank is a typical knife carriage having a plurality of knives mounted thereon for cutting the body blank into a plurality of individual can bodies. The improvement is a pivoting retainer member mounted on the knife carriage that functions to engage the open end of the axially moving can body blank rotating therewith and functions to precisely position the entire length of the blank with respect to the cutoff knives.

Abstract: A high speed yarn carrier or tube comprising a plurality of spirally wound plies of paper and incorporating, beneath the very thin overlapped outer surface defining ply, a strong underply provided with opposed deckle edges overlapped to a width no greater than that of the individual deckle edges. The deckle edge overlap is preferably less than a full overlapping whereby a small sink or depression is formed at the overlap.