Abstract:
Uniformity of hot melt coatings on thermally sensitive plastic and other webs (1) is maintained by use of a silicone or other rubber-like web back-up roll (R₁) the dimensional stability of which is maintained during hot melt coating of the webs (1) by a heat-conducting idler roll (R₂) directly contacting the back-up roll (R₁) temperature and a heat transfer source (H) for temperature deficiencies on the silicone roll surface (R₁), aiding constant nozzle(N)-to-web (1) spacing (B) irrespective of temperature variations and line speeds. Provision is also made for the introduction of chilling, if required.
Abstract:
The invention relates to an apparatus and method of controlling the generation of somewhat-to-highly viscous fluid fibres, 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:
Uniformity of hot melt coatings on thermally sensitive plastic and other webs (1) is maintained by use of a silicone or other rubber-like web back-up roll (R₁) the dimensional stability of which is maintained during hot melt coating of the webs (1) by a heat-conducting idler roll (R₂) directly contacting the back-up roll (R₁) temperature and a heat transfer source (H) for temperature deficiencies on the silicone roll surface (R₁), aiding constant nozzle(N)-to-web (1) spacing (B) irrespective of temperature variations and line speeds. Provision is also made for the introduction of chilling, if required.
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:
This disclosure is concerned with enabling the use of multiple liquid adhesive nozzles (7') principally to provide continuous uniform adhesive layers (C), particularly in relatively small items such as cigarette filter tips or the like, wherein a critically oriented adhesive shear surface (11') adjacent the nozzles causes the plurality of adhesive beads (2) simultaneously deposited by the nozzles (7') to merge into a full, continuous, uniform coating, (C) and with additional control features provided to control the degree of merger from separate adjacent beadsto uniform merged coating.
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 viscosity fluids and high web speeds.
Abstract:
The invention relates to an apparatus and method of controlling the generation of somewhat-to-highly viscous fluid fibres, 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.