Abstract:
A fabric is disclosed which comprises crossing yarns (36, 40), which can be the warp and the weft of a woven fabric, and in which at their crossing points, or nodes, the yarns are welded to one another. Apparatus for welding the crossing yams by heat and by pressure is also disclosed. The apparatus in one form comprises a head (38) which feeds out a weft yarn (40) as the head crosses a number of warp yarns (36). An acoustic horn (42) and anvil (30) are provided for welding the nodes together immediately after the weft (40) has been fed out. The anvil is serrated to provide sloping supporting surfaces (32) and buttress surfaces (34) against which the yarn (36) is pressed by the yarns (40) as the horn passes over each yarn (36).
Abstract:
An arrangement for an apparatus (1) for application of roof covering (2) and comprising a wagon (4) moveable by aid of wheels (3) intended to join together two unrolled rolls of roof covering in connection to a joint (5) on top of each other lying covering layers (6, 7) by aid of a hot air aggregate (8) supported by said wagon (4), which via a nozzle (9) blows hot gas into said joint (5) at the same time as the wagon (4) is moved forwards and at least one operating pressure roller (10) included in said wagon (4), which is intended to press together the covering layers (6, 7) lying on top of each other. The hot air aggregate (8) is turnably supported onto the one front outer portion (12) of said wagon (4) by aid of a hinge (11) having its nozzle (9) turnable inwards between those covering layers (6, 7), which shall be welded together and said operating pressure roller (10) is provided in the front, central portion (13) of the wagon (4) immediately after the nozzle (9) on the same when it is in its turned in, active position and which comprises a middle portion (14) having a smaller diameter than adjacent outer portions (15, 16) for achieving two application surfaces (17, 18) against a joint surface (19) in the joint at the same time as an extra pressure roller (20) is provided after or behind the operating pressure roller (10) intended only to act against that surface of the joint (5), which the first, operating pressure roller (10) has not treated.
Abstract:
A high-altitude balloon having prestrained gores (12) made from an asymmetrical gore pattern. The invention includes the balloon, the method of assembling the balloon, and a table (20) specially designed to implement the method. The method can be used to assemble balloons of varying shapes and sizes, with a determinable range of ratios of gore width to gore length. The method involves cutting and sealing edges of a pair of flexible plastic sheets along a straight edge (28) of a table, then inverting the seam so formed until it is aligned with a curved index line (40) on the surface of the table (20). The curved index line (40) is longer than the seam created along the straight edge so stretching is required during inverting. Successively cutting, joining and inverting pairs of sheets in this manner produces a balloon with a plurality of symmetrical gores that give the balloon a predetermined shape when inflated.
Abstract:
A web article (28) includes at least a first fibrous layer (36) laminated with a first facing surface (72) of at least one polymer film layer (38). The first fibrous layer can include a first quantity of cellulosic fibers. The first fibrous layer and the at least one polymer film layer have been configured to provide a target web (26), which has been moved at a selected web speed. A rotating anvil roller (34) and counter-rotating pattern roller (32) have been urged together to provide a selected nip force value. Additionally, the target web has been moved at the web speed through a nip region (30) between the anvil roller (34) and pattern roller (32) to provide an operative first bond between the first fibrous layer (36) and the at least one film layer (38).
Abstract:
An optical disk production device characterized by comprising a nozzle for jetting a cation type ultraviolet curable composition, an ultraviolet ray irradiation means for applying an ultraviolet ray while the cation type ultraviolet curable composition falling from the nozzle reaches a disk substrate, and an overlapping means for overlapping two disk substrates one upon another to form one disk with surfaces on which the ultraviolet curable composition has fallen facing each other, wherein the device is preferably provided with a flat stationary placement surface for mounting the disk thereon because the cation type ultraviolet curable composition is stretched between the two overlapped disk substrates overlapped by the overlapping means, the device preferably further comprising a stacking means for stacking a plurality of the disks and a rigid disk placing means for placing a rigid disk having a flat surface on the disks while the plurality of disks are stacked.
Abstract:
A process for the continuous preparation of non-expanded honeycomb core from non-precorrugated web involves the progressive corrugation and consolidation of web by a corrugating/consolidating unit containing corrugating and consolidating elongate teeth which traverses a bed unit containing sets of former bars (1 and 4), forming a half cell height of honeycomb on each pass. A plurality of node-antinode demes of the topmost half cell layer being formed are consolidated while new corrugations and associated node-antinode demes are being formed. The process allows for more lengthy consolidation time, a smaller temperature differential between consolidating teeth and the node-antinode demes being consolidated, and further allows the corrugating and consolidation temperatures to be substantially independent of each other. The process may be implemented through use of a corrugating/consolidating unit having a travelling belt containing corrugating and/or consolidating teeth which may be individually and selectively heated. The process and apparatus allow production of honeycomb even from thin thermoplastic web materials at high production rates. In a preferred embodiment, the teeth are radiant energy transmissive teeth associated with a source of radiant energy directed through the teeth toward the bottom, node-antinode contacting face.
Abstract:
A machine for welding an overlapped region of two adjacent strips of material and a method of using the same. The machine includes a housing with front and rear ends, a wheel train engaged with the housing for moving the housing across the material; a nozzle on the housing having a welding head at a free end; the nozzle being positionable at least partially beneath the housing's bottom wall for welding the overlapped region; front and rear pressure rollers engaged with the housing, where the front roller is positioned forwardly of the welding head and the rear roller is positioned rearwardly of the welding head; wherein the rear pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a forward direction; and the front pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a reverse direction.
Abstract:
The bonding method and apparatus (20) includes a delivering of a target web (26) having one or more selected bonding materials through a nip region (30) between at least one cooperating pair of rotatable bonding rollers (32, 34), thereby forming and producing a bonded web (28). In a particular aspect, a pattern roller (32) can be configured to provide a distinctively high, pattern surface speed. In another aspect, the pair of bonding rollers can be configured to provide a distinctively low, bonding pressure value. In further aspects, an anvil roller (34) can be provided with an anvil surface speed, and the anvil surface speed can be configured to be substantially equal to the pattern surface speed.