Abstract: A silicone release paper comprises a porous and highly absorbent paper substrate integrated with a radiation-insensitive hardened hot melt barrier coating, upon which coating a radiation-cured silicone coating layer has been secured. The barrier coating is formed of a material having a viscosity sufficiently low that the material permeates the porous paper substrate. A pressure-sensitive adhesive may be provided on the side of the paper opposite to that on which the silicone coating layer has been secured.

Abstract: The invention relates to an apparatus and method of controlling the generation of somewhat-to-highly viscous fluid fibers, droplets and combinations of the same, including hot melt adhesive and other fluids, that comprises, spraying a stream of such pressurized fluid through a fine orifice and along a predetermined direction in free flight, and simultaneously funneling a cone of pressurized air symmetrically about and against said stream, intersecting the same in its free flight below said orifice to control the nature, dimensions and pattern of the resulting fluid coating on surfaces disposed therebelow. Supplemental air controls are also providable for contouring and other effects.

Abstract: A novel hot-melt and other viscous fluid and coating screen-printing method and apparatus in which a line of fluid is extruded against a predetermined region of a rotary screen opposite which a web is drawn to transfer the fluid extruded at said region through the screen pores, with large cross-section fluid extrusion sealed against the inner wall of the screen as the same rotates past said region, and with features of fluid pressure and screen heating synchronous and proportional to line speed, inerted inner screen cavity construction (and possible exterior inerting of the screen, and novel web drawing roller positioning, including web-movement rotation of the screen, and all accommodating high viscosty fluids and high web speeds.

Abstract: A novel preferably poppet-valve-controlled fluid applicator for extruding hot melt and other coating fluids and the like as fibers or filaments and/or droplets upon moving webs and other surfaces wherein the valve seat tip blocks or permits the flow of the fluid into a hollow nozzle insert communicating with, preferably, a needle-like nozzle tube spray extruder, with provision for adjustment to produce controlled fiber and/or droplet spray coatings, and preferably though optionally with air-shaping control of the coatings.

Abstract: The invention relates to an apparatus and method of controlling the generation of somewhat-to-highly viscous fluid fibers, droplets and combinations of the same, including hot melt adhesive and other fluids, that comprises, spraying a stream of such pressurized fluid through a fine orifice and along a predetermined direction in free flight, and simultaneously funneling a cone of pressurized air symmetrically about and against said stream, intersecting the same in its free flight below said orifice to control the nature, dimensions and pattern of the resulting fluid coating on surface disposed therebelow. Supplemental air controls are also providable for contouring and other effects.

Abstract: Uniformity of hot melt coatings on thermally sensitive plastic and other webs is maintained by use of a silicone or other rubber-like web back-up roll the dimensional stability of which is maintained during hot melt coating of the webs by a heat-conducting idler roll directly contacting the back-up roll temperature and a heat transfer source for temperature deficiencies on the silicone roll surface, aiding constant nozzle-to-web spacing irrespective of temperature variations and line speeds. Provision is also made for the introduction of chilling, if required.

Abstract: A novel combined hot melt and other fluid preferably slot nozzle-roller coater assembly and technique enabling elimination of streaks and other aberrations caused by undissolved particles or dust and the like in the fluid, and adapted for multi-fluid mixing, if desired.

Abstract: A method of producing silicone-coated release papers, labels and tapes and the like in an in-line procedure through the use of a radiation-insensitive hot melt barrier coating on poor porous and highly absorbent paper substrates, and upon which barrier coating a silicone coating is radiation cured.

Abstract: Uniformity of hot melt coatings on thermally sensitive plastic and other webs is maintained by use of a silicone or other rubber-like web back-up roll the dimensional stability of which is maintained during hot melt coating of the webs by a heat-conducting idler roll directly contacting the back-up roll temperature and a heat transfer source for temperature deficiencies on the silicone roll surface, aiding constant nozzle-to-web spacing irrespective of temperature variations and line speeds. Provision is also made for the introduction of chilling, if required.

Abstract: Metered application of coating materials, ranging from room temperature to hot melt coatings and adhesives, through the use of fluid-porous roll applicators operating singly or in multiple units for transfer or direct coating, including simultaneous continuous or intermittent patterns and simultaneous different weight pattern coatings or different material coatings.

Abstract: A method of and apparatus for the hot melt or other fluid coating and the web handling of lightweight low web-tension-supporting, non-woven and similar materials, having a novel nozzle region using entrance and exit web-supporting surfaces and positioning in order to compensate for web deflection caused by the fluid coating ejection forces that otherwise render the coatings non-uniform and destroy sharp leading and trailing edges of intermittent coatings.

Abstract: A method of and apparatus for co-extruding upon a first continuous coating adhered to a substrate band (such as a pressure-sensitive adhesive), periodic top coat sections of coating material of different characteristics (such as non-stick properties), as for such purposes as providing laminating adhesive strips in desired regions only, as for use in diaper laminates and the like.

Abstract: A method of and apparatus for helical screw controlled-quantity extrusion of powdered material, such as, for example, moisture-absorbent super fine powders, with automatic filling of hot-melt laminated pouches, at least partially porous, as for use in diaper or other similar applications, and while obviating hazardous release of the powder.

Abstract: A roll coating applicator and method for applying a coating fluid to a moving web which includes applying coating fluid through a nozzle to a rotating roll, positioning one or more rolls in coating fluid engaging contact with each other and at least one of which is in coating fluid engaging contact with the first roll, rotating the second roll at a greater rotational speed than the first roll and positioning a portion of a moving web in coating fluid engaging contact with the second or subsequent roll.

Abstract: A three-way poppet valve for directing the flow of a fluid that will permit precise, constant thickness patterns of fluid coating upon a moving surface and cause a minimum of after-drool when the coating process is ceased. The three-way poppet valve assembly is also provided with means to rapidly change the direction of fluid flow to create rapid on/off fluid deposition cycle times and facilitate the formation of minimum length coatings on a rapidly moving surface.

Abstract: This disclosure is concerned with independent fluid dispensing by a multi-slot cavity nozzle with opposing zig-zag fluid path baffle-diversion operation, generating a pair of adjacent line fluid depositions upon a web moving past the nozzle, and enabling the separate but simultaneous use of adhesives and other fluid media of different characteristics and in widely flexible multi-layer coating patterns including superposed, side-by-side, spaced and other multi-layer patterns.

Abstract: A method and apparatus are disclosed for enabling integrated in-line synchronous hot-melt or similar adhesive coatings of web materials and simultaneously radiation-cured silicone coatings for use therewith, as for release purposes, through the use of coating and curing stations controlled with web speed and compatibly with the adhesive application and hardening steps.

Abstract: This disclosure is concerned with enabling the use of multiple liquid adhesive nozzles principally to provide continuous uniform adhesive layers, particularly in relatively small items such as cigarette filter tips or the like, wherein a critically oriented adhesive shear surface adjacent the nozzles causes the plurality of adhesive beads simultaneously deposited by the nozzles to merge into a full, continuous, uniform coating, and with additional control features provided to control the degree of merger from separate adjacent beads to uniform merged coating.

Abstract: This disclosure is concerned with enabling the use of multiple liquid adhesive nozzles principally to provide continuous uniform adhesive layers, particularly in relatively small items such as cigarette filter tips or the like, wherein a critically oriented adhesive shear surface adjacent the nozzles causes the plurality of adhesive beads simultaneously deposited by the nozzles to merge into a full, continuous, uniform coating, and with additional control features provided to control the degree of merger from separate adjacent beads to uniform merged coating.

Abstract: This disclosure involves periodically bumping webs such as a cigarette filter paper or the like against a shear surface disposed beyond a multi-nozzle adhesive extruder to provide longitudinally intermittent bands of adhesive coatings for the filters or the like, with optional provision for continuous marginal lines of adhesive along and between the bands for adhesion on the head and tail ends of such filters or other articles as well.