Abstract: Diffusion bonding techniques are extended to the simultaneous bonding of an array of multilevel piece parts. The problems of uneven expansion and contraction of different levels of different piece parts in the array are obviated by positioning each level of the array within a frame. The stack of frames is pinned in one corner. The opposite corner of the array has a slot at a 45° angle with respect to the x and y axes of the array. The slot engages a pin and allows the entire array to expand and contract along the slot in a manner to maintain the registration of features between respective levels of each piece part.

Abstract: A cleaning product comprises a base sheet and at least one layer of filaments or split yarns oriented in one direction, the base sheet and the layer are stacked and bonded together at a plurality of bonding lines extending in a direction intersecting with the one direction, and the base sheet is cut together with the layer intermittently in the intersecting direction between adjacent bonding lines to form cutting portions, thereby forming brushing portions with the layer. The cleaning product can be produced simply and conveniently at small cost. Further, it also has an excellent dust collecting effect.

Abstract: The invention proposes an upholstery element with a covering which covers a core of an elastic material, preferably of a foamed plastic, and is fastened to this core by an anchorage element which is enclosed by the core, wherein the surface of the core (1) comprises a groove (4) which widens inwards, one edge of a material strip (7) is fixed to the inside of the covering (2), the opposite edge of which strip is provided with a dimensionally stable body (3), the body (3) is introduced into the groove (4), and the maximum diameter of the body (3) is located in the groove (4) and is greater than the minimum diameter of the groove (4), and a method for the production thereof.

Abstract: An absorbent article such as a sanitary napkin, having an improved topsheet that provides improved skin comfort as well as superior fluid handling characteristics. Such absorbent articles comprise a main body portion preferably comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core positioned between the topsheet and the backsheet. The main body portion has longitudinal edges and lateral edges. The topsheet has a central zone and a pair of end zones extending laterally outwardly from and contiguous with the central zone. The topsheet comprises a nonwoven outer layer and an apertured thermoplastic film layer. The nonwoven outer layer has an opening positioned in the central zone.

Abstract: Disclosed are venting hole structures suitable for AC grounding planes in multichip modules (MCMs) and the like. Such structures may be constructed from alternating layers of metal and dielectric materials, such as copper and polyimide, respectively. The venting structures according to the present invention are formed in the metal layers of grounding planes and enable gases trapped within the underlying dielectric layers to escape (so as to prevent delamination) without disturbing the function of the AC grounding plane to provide controlled impedance characteristics for signal lines disposed above and below the grounding plane.

Abstract: A mask for covering a substrate for performing capacitance-voltage measurements on the substrate is a full-faced mask covering substantially all of the substrate and having a thin outer section and a thicker inner section, so that the outer section is thin enough to permit desired clearance tolerances when inserting the substrate/mask assembly into or removing it from a cassette, and the inner section is thick enough to provide structural stability to the mask to ensure proper contact between the mask and the test substrate. The mask may include a ring with one or more strips across the ring with holes in the strips for target material deposition. In an alternative embodiment, the mask may be a disk with holes at various locations across the disk. In either embodiment, the mask generally conforms to the shape of the substrate, so that the clamp ring of the PVD chamber seats on the mask or on the substrate, so little or none of the plasma or sputtered material can escape between the substrate and clamp ring.

Abstract: A topsheet for body fluids absorbent article is made of thermoplastic synthetic fibers mechanically entangled so as to extend substantially in a desired one direction and formed with liquid-permeable openings. The openings comprise a first group of openings each having a substantially oval shape defined by its major axis extending substantially in parallel to the direction in which the fibers extend and its minor axis extending orthogonally to the major axis and a second group of openings each having a substantially oval shape defined by its minor axis extending substantially in parallel to the direction in which the fibers 11 extend and its major axis extending orthogonally to the minor axis.

Abstract: A semiconductor wafer comprising a single crystalline lattice suitable for use in the manufacture of integrated circuits, namely computer chips and dies, wherein a diameter of the wafer is greater than approximately 150 millimeters and wherein the wafer includes a first hole extending through the wafer. The hole is adapted to facilitate handling of the wafer without directly contacting a surface of the wafer. The wafer preferably includes a primary flat and the first hole includes a flat side having a predetermined and known orientation with respect to the primary flat of the wafer. In one embodiment, the wafer further includes a guide hole formed near the first hole such that the center-points of the first hole and the guide hole are oriented with a predetermined and known orientation with respect to the primary flat of the wafer.

Abstract: A graphite having geometrically shaped holes limited to the top atomic layer such as circles, polygons and combinations thereof, and a method of preparing a graphite having geometrically shaped holes such as circles, polygons and combinations thereof where the geometrically shaped holes are limited to the top atomic layer.

Abstract: A method for obtaining a tire comprising a colored motif and a decal inted to be applied to the outer surface of a vulcanized rubber tire. The decal is made of a thin sheet serving as temporary support for a motif made with one or more vulcanizable colored inks. The support has at least one cutout having a shape adapted to permit the fitting therein of at least one element in relief protruding from the surface of a tire at the place selected for the colored motif.

Abstract: A motor vehicle dashboard including a body made of injection-molded plastic form, and at least one air duct integrally molded with the dashboard body. The air duct is produced by means of an at least partially absorbable removable insert, particularly an inflatable balloon.

Abstract: A method of fabricating a plastic mask for paste printing with a plastic sheet being irradiated with an excimer laser beam for forming at least one penetrating opening containing area including at least one through-hole in the plastic sheet is carried out by the steps of bringing a polymer film capable of absorbing at least part of the excimer laser beam into close contact with a back surface of the plastic sheet which is opposite to an excimer laser beam irradiation side thereof which is to be irradiated with the excimer laser beam; forming at least one penetrating opening containing area including at least one through-hole in the plastic sheet by irradiating the excimer laser beam irradiation side thereof with the excimer laser beam; and removing the polymer film from the plastic sheet after the formation of the penetrating opening containing area. By use of a plastic mask fabricated by the above method, a paste printing is also carried out.

Abstract: A system for framing a canopy has a carrier sheet and a coating of adhesive deposited onto the carrier sheet. A transparent film is cast over the coating of adhesive, and the film defines a plurality of slits configured for forming frames or masks which conform to the shape of the canopy. Alternatively, in a method for framing a canopy having interior and exterior sides, a first coat of paint having a first color is applied onto a first side of a transparent film, and a second coat of paint having a second color is applied onto the first coat of paint. A second side of the film is then adhered to the exterior side of the canopy so that the first coat of paint is visible on the interior side of the canopy, and the second coat of paint is visible on the exterior side of the canopy.

Abstract: The invention concerns flexible, composite, multilayer sheets which act as means to open and close appropriately shaped containers (f.i. trays) of products consumable also in more successive doses and which are characterized by an opening edge, a device to stop said opening, a tamper evident device and a protection layer. Said multilayer sheets include at least:a first superior outer layer consisting of at least a film acting as support of the printing and of a press-sensitive adhesive;a second inferior inner layer consisting of at least a thermosealant film and characterized by die-cut zones having the function to detemine the access mouth shape and to create an invitation to the eased opening; andan intermediate layer consisting of a press-sensitive adhesive.

Abstract: The present invention relates to a liquid-permeable casing sheet (1) for absorbent sanitary articles, such as sanitary napkins, incontinence guards and diapers. According to the invention, the casing sheet (1) includes a first layer (2) which is corrugated across at least a central part of its surface so as to provide a row of mutually parallel waves having wave crests (3) and wave troughs (4), wherein the wave crests form an article contact surface with the wearer's body when the article is in use. The casing sheet also includes rows of through-penetrating openings (6) which extend perpendicularly to the corrugations or waves and each of which opening passes through a wave crest (3).The invention also relates to a method for producing such a casing sheet.FIG. 1 for publication.

Abstract: The lumen surface of tubing is modified by exposure to a gas plasma in a vacuum apparatus. A method and apparatus are disclosed whereby plasma treatment of the lumen surface, such as by deposition of a plasma polymerizate, may be achieved inside a continuous length of tubing. A gas such as a monomer vapor is caused to enter the lumen of the tubing through openings sequentially arranged at a periodic interval along the length of the tubing, and is excited to a plasma state concurrently as the tubing passes through a tubular reaction conduit having an inner diameter in occlusive contact with the tubing's outer diameter. Essentially crack-free plasma polymerizate coatings with thicknesses greater than 1000 angstroms are selectively deposited on the lumen wall of the continuous tubing. Plasma-modified tubing is prepared having usefulness in medical devices such as catheters, vascular grafts and enteral feeding tubes.

Abstract: A paneling system includes a first upper or outer plate having a plurality of outwardly extending tabs unitarily and integrally formed therewith and a second, lower plate spaced apart from the upper plate to present a void therebetween. The tabs span the void and join with the second plate to fixedly secure the plates together to form the panel construction. The free ends of the tabs may be welded within slots formed in the second plate to secure the plates together. Alternatively, the tabs may be L-shaped to present a flange in parallel relation to the plates. The flanges are welded to the second plate to secure the plates together. The tabs may present anchor holes in the first plate for securing a load in place. The first plate may include a raised portion at the periphery of the anchor holes to help prevent skidding.

Abstract: The description is given of a molding, in particular for furniture and particularly for seating furniture, which has at least one surface with a number of curves and which consists of a multi-layered material with fibers. According to the invention, a multiplicity of slits are arranged in the at least one curved surface of the molding such that the slits can take up the change in the dimensions of the material in relation to the non-deformed state, with the result that an essentially stress-free state can be achieved without damage to the outer layers of the material in the region of the curved surface.

Abstract: An improved baffle (24) for directing the light discharged from a deuterium lamp includes a plate-like member configured as a cylindrical segment (25), an aperture (27) provided through a central portion (26) of the member, and a flattened portion (26) about the aperture. The flattened portion is of such size and has a surface of such reflectivity as to substantially eliminate interference ring(s) of discontinuous light intensity from the light output of the lamp. A deuterium employing the improved baffle affords the advantage of markedly-increased light intensity, as compared with prior art baffles, at selected wavelengths.

Abstract: Materials from which metal film capacitors with plastic or other dielectric films are formed include a plurality of regions or segments defining plates of a capacitor, the regions electrically interconnected by fuse regions which separate a region containing a short circuit fault from the capacitor. The plurality of regions or segments are circular. The fuse regions may be circular or may alternatively be high resistivity regions filling spaces between the plurality of regions or segments. A capacitor having a higher energy storage density and safer construction is wound from these materials using conventional techniques.

Abstract: A papermaking through-air drying belt and a method of making the same, as well as a paper web produced on the belt and the process of making the web are disclosed. The belt comprises a resinous framework having a web-side surface defining an X-Y plane, a backside surface opposite the web-side surface, a Z-direction perpendicular to the X-Y plane, and a plurality of discrete deflection conduits extending between the web-side surface and the backside surface. Each of the discrete conduits has an axis and walls. The axes of at least some of the discrete conduits and the Z-direction form acute angles therebetween. Preferably, the belt also comprises an air-permeable reinforcing structure joined to the resinous framework.

Abstract: A gas-permeable, pathogen-resistant seal for sealing packages containing medical products is described. The seal comprises a labyrinthine passage, preferably formed in two dimensions, through which bacteria cannot pass. The seal functions to block the passage of bacteria without an additional bacteria blocking material. A method for making the subject seal using heat sealing techniques is also described.

Abstract: A multi-fabric layer, resin matrix laminated composite tube is disclosed having an end portion adapted for crush initiation by the provision of slits in the fabric of at least the innermost fabric layers of said tube, the lengths of said slits preferably decreasing in progressively outer fabric layers of the laminated material.

Abstract: An improved adjustable skimmer belt having a belt of two layers at least one of which has an outer surface of non-absorbent oleophilic-oriented hydrophobic loop-type fibers, vertical and horizontal stitching creating a repeating pattern and used to attach the layers, a plurality of apertures transversing the layers following the repeating pattern thereby creating liquid-collecting pockets between the two layers, and a connector and adjustor formed by the pattern and used to cut and adjust or repair the belt as needed.

Abstract: A method of forming apertured webs is provided comprising the steps of: (a) forming a foraminous member comprising gross foramina and fine foramina wherein the gross foramina define a patterned design superimposed on the fine foramina by means of applying and curing a photosensitive resin onto a foraminous element comprising fine foramina in order to form elevated portions on the fine foramina defining the gross foramina, (b) providing a layer of fibers on said foraminous member; and (c) applying fluid streams to said layer of fibers such that the fibers are randomly entangled in regions interconnected by fibers extending between adjacent entangled regions in a pattern determined by the pattern of the gross foramina of the foraminous member to form an apertured web.

Abstract: A steel reinforced filled polymer torque rod and method of making the same, is disclosed. The torque rod includes a stamped metal reinforcement plate having first and second bores therethrough which are surrounded by first and second annular flanges, respectively. The stamped metal reinforcement plate also includes a depression extending axially between the first connector bore and the second connector bore, and an end flange surrounding an end surface of the reinforcement plate. The torque rod also includes a polymer shell which encases and conforms to the stamped metal reinforcement plate. The polymer shell includes a first connector portion which encases the first connector bore and first annular flange, a second connector portion which encases the second connector bore and the second connector flange, an end wall which encases the end flange, and a number of side walls which encase the depression.

Abstract: A polymeric laminate for use in polymeric films, and packaging material and packages made therefrom, that is roughened or knurled to produce a series of nicks or cuts over substantially the entire surface area of the laminate, producing an easy-opening feature. The laminate may be a multilayer, polymeric structure that may comprise an oriented polypropylene, polyethylene terephthalate, or a biaxially oriented nylon. The packaging material of the invention may contain a sealant film, either a single layer or multilayer film, and may also comprise an intermediate layer of foil.

Abstract: The present invention provides a molded shield for use as a protector for a roll. The shield comprises a first section for insertion into an end of the roll, the first section having a degree of curvature approximating that of an inside surface of the roll; and a second section integral with the first section and substantially perpendicular thereto, the second section to abut the end of the roll into which the first section is inserted. A method and an apparatus for forming a roll protector shield is also provided. Preferable, the shield is formed from ultra-high molecular weight polyethylene.

Abstract: A rectangular spalling-resistant refractory setter for use in heating furnace, which is made of a material having a bending strength of 1,000 kgf/cm.sup.2 or higher at 1,000-1,300.degree. C. and which has slits extending from each of at least one pair of the parallel sides of the setter toward the opposite side in a length of 15-35% based on the length of each side which is parallel to the slit.A creep-resistant setter which is made of a Si--SiC sintered material containing controlled amounts of impurities and having a controlled porosity.An oxidation-resistant setter which is made of a Si--SiC sintered material containing controlled amounts of impurities and having a controlled porosity.These setters are superior in spalling resistance, creep resistance and oxidation resistance, can mount thereon an increased amount of materials to be fired, and give a higher firing efficiency.

Abstract: A bilayer laminated medical dressing having a thermally expandable passage is provided. The medical dressing achieves gas permeability as a function of temperature by cutting a star-shaped hole through the dressing when the dressing is flat and relaxed. On warming, the leaves between the radial cuts of the star-shaped hole curl and increase the hole size. Such a material is useful as a medical dressing.

Abstract: A pad including thermal insulation and heat sink areas. The pad includes a plurality of layers of metal foil forming a stack with the layers arranged one above the other, the stack including at least one heat sink area and at least one insulating area adjacent to the heat sink area, the layers providing better heat conduction in the vertical direction at the heat sink area than at the insulating area. At least one of the layers includes a plurality of embossments therein separating the one layer from an adjacent one of the layers in the insulating area. The pad can include a single insulating area surrounded by a heat sink area and a black coating can be provided on selected portions of the layers to improve heat radiating characteristics of the pad. For instance, the heat sink area can be coated with the black coating to radiate heat away from the pad at a desired location.

Abstract: A method is provided for triple extrusion of a foam material, a coating and one or more flexible flanges attached to the coating or foam material. All three materials are coextruded through a common die and are useful for forming window sashes.

Abstract: A composite web structure utilizing a thin first layer of material having a plurality of structural fibers arranged to lie essentially in a unidirectional orientation. A thin second layer of material is positioned adjacent the first layer and includes a plurality of structural fibers. First and second layers are impregnated with a matrix material for binding fibers within the first and second layers and for binding the first and second layers together. The web may be formed into a composite structure such as a honeycomb core for fabrication into a panel.

Abstract: An antifalsification paper is described having an embedded safeguarding thread which is embedded in the paper so as to be freely accessible in some areas. The safeguarding thread has a width greater than 2 mm. The antifalsification paper comprises at least two paper layers produced on separate paper machines. The safeguarding thread is embedded in the first paper layer which has openings or recesses in its surface through which the thread is partly accessible on both sides. This first paper layer is covered with at least one second paper layer and firmly connected therewith, the second paper layer having a thickness of 10 to 50%, preferably 20%, of the total thickness of the antifalsification paper. The use of particularly wide safeguarding threads and the resulting possibility of equipping the threads with certain optical effects can improve the resistance to forgery of the antifalsification paper provided therewith.

Abstract: A base board for a layered corrugated fiberboard structure comprises a corrugated fiberboard material including a corrugating medium having flutes, first folds along which the corrugated fiberboard material is folded in the shape of the inverted letter V, and second folds along which the corrugated fiberboard material is folded in the shape of the letter V, and the first folds and the second folds are formed in the corrugated fiberboard material in parallel to each other and in an alternate arrangement so as to extend perpendicularly or at an angle other than a right angle to the flutes. The second folds are lines of perforations, and portions of the corrugated fiberboard material that forms an outer surface when folded are incised along the lines of perforations.

Abstract: An enclosure panel for covering the access opening in an equipment compartment includes a main panel body which is constructed and arranged so as to attach directly to the equipment compartment in such a way as to substantially cover the access opening. The main panel body defines a plurality of oblong slots which are arranged into a plurality of side-by-side columns wherein each column is configured with a substantially uniform herringbone pattern. The herringbone pattern provides a unique and preferred compromise between a uniform pattern of oblong slots arranged in columns and rows and a uniform pattern of circular openings arranged in staggered rows and columns. By use of the uniform herringbone pattern the open area for preferred cooling air flow is achieved while at the same time maintaining the structural strength and integrity of the enclosure panel.

Abstract: The present invention involves an apparatus and method for gathering and removing yard waste. The apparatus includes two parts, a laminar sheet and a plurality of spikes. The laminar sheet is placed on the ground and secured using the spikes. A number of apertures pierce the sheet to allow oxygen to aspirate the plantlife below and to allow water from above to pass through. Clear plastic is preferably used to allow sunlight to reach the plantlife, but other colors and materials are possible if so desired. After leaves, tree limbs, and other yard waste have accumulated on the sheet, the spikes may be removed from the ground and the sheet and waste may be bundled together and discarded.

Abstract: The perforated sheet, in particular for sanitary articles, and made of a substance that is impervious to liquid, includes a multiplicity of craters each having a base in the plane of the outside face, an apex, and a sidewall that slopes between the base and the apex. The peripheral shape of the base includes at least one zone of discontinuity such that on going round the periphery of each crater, its sidewall presents non-uniform inclination with angles of inclination relative to the perpendicular to the plane of the outside face of the sheet that vary between positive values and negative values, said angle being negative at least in the zone of discontinuity. The peripheral shape of the base is preferably the result of partially overlapping a plurality of curved geometrical shapes, in particular circles and ellipses, and the zone of discontinuity corresponds to the junction between superposed shapes.

Abstract: A supply feedstock intended for use in a workpiece finishing machine wherein individual workpieces are successively separated and presented in a predetermined fashion to an automated loading means. The feedstock includes a plurality of individual workpieces arranged in side-by-side order in the form of a continuous belt, or bandolier, of workpieces, each of the workpieces being interconnected at head and tail portions of the workpieces by integral webs, successive workpieces being trimmed from the bandolier and presented to a loading means, while the separated webs are discharged to waste.

Abstract: The present invention provides a constrained layer damper having slits and/or cutout(s) therein, which provides improved vibration damping performance. The constrained layer damper of the invention is useful, for example, for damping rotatable spacer articles and also rotatable storage media such as compact disks.

Abstract: A label comprised of at least two coupled plies is disclosed that can incorporate a removable game on the inside face of the centerpiece region of an outer ply. An edge region on the outer ply, which circumscribes the centerpiece region, is adhered to an inner ply. A weakened region separates the edge region from the centerpiece region so that the centerpiece region is removable from the label by first decoupling a segment of the centerpiece region from the edge region of the outer ply, and then grasping and pulling the centerpiece region from the label to decouple it completely from the label.

Abstract: A fusible adhesive sheet includes a heat-sensitive substrate having a geometrical configuration of intersecting diagonal lines with diamond-shaped voids between the lines. A lattice of pressure-sensitive adhesive is positioned on the substrate and has intersecting diagonal lines with diamond-shaped voids in between the lines in a pattern different from that for the substrate. Removable release liners are provided. In another form, the lattice work of pressure-sensitive adhesive is on a solid substrate of heat-sensitive adhesive. To make the heat-fusible sheet, the heat-sensitive adhesive is fed into the nip between a gravure roller and elastic surfaced roller. The surface of the gravure roller is provided with a series of valleys. The pressure-sensitive adhesive in liquid form is applied to the surface of the gravure roller and deposited onto the heat-sensitive adhesive and cured with heat.

Abstract: A controlled elastic composite material which is produced by forming a flexible elastomer layer or layers on one or both surfaces of at least one member selected from the group consisting of (a) a longitudinally monoaxially oriented reticular web, (b) a transversally monoaxially oriented reticular web, (c) a woven or non-woven fabric composed of monoaxially oriented tapes, and (d) a stretched long fiber web in which long fibers are aligned almost in one direction.

Abstract: The invention relates to a mold apparatus and a process for forming a lid latching mechanism in a thermoplastic container. The lid latching mechanism features a large, trapezoidally-shaped opening hole. The trapezoidal shape has been found to reduce the amount of tearing that can occur along the edges of an opening formed during the thermoforming process. The opening is created by the engagement between a fixed shear key mounted in a first mold member and a movable shear key which has a trapezoidally-shaped cutting surface and is mounted in a second mold member. The movable key travels along an inclined path as the mold members close on a preheated thermoplastic sheet to form a container.

Abstract: A decorative ribbon is shown including a controllable adhesive on the backside thereof for select placement on package material and select removal, if necessary, therefrom without damage to the package. The decorative ribbon according to the present invention may include incomplete die cutting to provide portions of the ribbon which may be selectively moved out of the plane of the ribbon, but remain attached to the ribbon body. Furthermore, the incomplete die cuts may define ribbon portions which may be torn from the ribbon body whereby, by use of the controllable adhesive on the backside thereof, the ribbon elements may be selectively placed about a gift package according to user preference. A stretch ribbon includes alternating transverse die cuts directed inward from outside edges of the ribbon whereby upon application of longitudinal forces the ribbon stretches beyond its natural length and assumes a three dimensional character.

Abstract: A print-through form comprises a top and a base layer with the top layer having a pattern of openings in at least one region, the pattern of openings having center-to-center distances substantially less than, the size of characters or other elements to be printed. Ink applied to the region or regions with openings forms characters on the top layer by marking the area between the openings, and on the base layer in the same operation through the openings, marking the area on the base layer exposed by the openings through the first layer. More than two copies in a single printing pass may be accomplished with forms of more than two layers, wherein the patterns of openings expose area on all the intermediate layers and the base layer. In various embodiments forms may comprise sheets affixed by peelable adhesive, by folding larger sheets, and by edge gluing with removable strips made by perforation lines. Some forms are made to be fed through traction feeders from continuous webs.

Abstract: A bilayer laminated material has a gas permeability increasing greatly with temperature, achieved by cutting a star-shaped hole in it when it is relaxed and flat. On warming, the leaves between the radial cuts curl and disproportionately increase the hole size. Such a material, if flat at 5.degree. C. and wide open at 20.degree. C., is useful for packaging vegetable produce.

Abstract: A nonwoven fabric of entangled fibers defining a predetermined pattern of openings with the fabric having excellent draping characteristics.

Abstract: A predrawn net particularly for geotechnical use including an initial component that forms a first and a second layers that are respectively constituted by a first set of mutually substantially parallel filaments and by a second set of mutually substantially parallel filaments that lie transversely with respect to the filaments of the first set, so as to form a plurality of mutual joints. The filaments of the two sets mutually interpenetrate in the joints over a thickness that is less than 50% of one of the layers. The initial component is more than 8 mm thick. The filaments of at least one of the sets are drawn in the direction defined by the respective set of filaments so that the stretching action passes through the joints without substantially affecting the filaments of the other one of the sets.

Abstract: A polymeric film for use in absorbent structures comprises a planar surface having a frontside, a backside and a plurality of apertures. Walls extend from the perimeter of the apertures and outwardly from the backside. The walls and the backside form a capillary system on the backside. The walls form channels which connect the frontside of the film to the capillary system on the backside. The walls have at least one cut out portion extending the length of the walls. A fluid contacting the frontside of the film will spontaneously invert to the capillary system on the backside of the film through the cut out portions of the walls.