Method and apparatus for preventing slinging of liquid in a liquid applicator machine
OwnerBruce A. Schefferinventor
Life of this patent
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Abstract
A liquid applicator machine of the type operative to apply a liquid such as glue to a moving paper web or the like through a high speed transfer roll which receives a metered film layer of liquid thereon from a pan roller. A static ring is supported in coaxial predetermined spaced relation to each end edge surface of the transfer roll and has an outer annular surface overlapped by the pan roller such that liquid carried upwardly by the end surfaces of the pan roller engages the static ring and is prevented from accumulating at the end edges of the transfer roll and being slung therefrom during high speed rotation of the transfer roll. The invention finds application with full width and segmented transfer rolls to prevent fluid slinging therefrom.
Claims24
In a liquid applicator machine for applying a liquid to a moving web, said machine including a liquid reservoir, a pan roll having opposite end surfaces and being cooperative with the liquid reservoir so as to pick up liquid on the outer peripheral surface of the pan roll during rotation thereof, and a high speed transfer roll having opposite end edge surfaces and being cooperative with the pan roll so as to apply a metered liquid layer to the outer peripheral surface of the transfer roll during rotation of said rolls;
- the combination therewith comprising a static ring member supported in substantially coaxial predetermined spaced relation to each of the opposite end edge surfaces of the transfer roll, each of said ring members having an outer peripheral surface substantially coterminous with the outer peripheral surface of the transfer roll, said pan roll having a length greater than the length of said transfer roll so that opposite ends of said pan roll overlap the outer peripheral surfaces of said static ring members in juxtaposed relation therewith, said pan roll being cooperative with said static ring members such that liquid carried on the end surfaces of the pan roll tending to transfer to said transfer roll engages the corresponding static ring members and is prevented from accumulating at the opposite end edge surfaces of the transfer roll and being flung therefrom.
In a machine for transferring a liquid from the outer peripheral surface of a first carrier roll to the outer peripheral surface of a higher speed second roll, and wherein the first roll has opposite end surfaces and is adapted to receive and carry a liquid on its outer peripheral surface during rotation thereof, and the second higher speed roll has opposite end edge surfaces and is cooperative with the first roll so as to apply a metered liquid layer to the outer peripheral surface of the second roll during rotation of said rolls;
- the combination therewith comprising at least one static ring member supported in substantially coaxial predetermined spaced relation to a selected one of the opposite end edge surfaces of the second roll and having an outer peripheral surface substantially coextensive with the outer peripheral surface of the second roll, said first roll having an end extending beyond said selected end of said second roll so as to overlap the outer peripheral surface of said static ring member in juxtaposed relation therewith, said extending end of said first roll being cooperative with said static ring member such that liquid carried on the corresponding end surface of the first roll which tends to migrate onto the corresponding end of said second roll engages the outer peripheral surface of said static ring member and is prevented from accumulating on the corresponding end edge of said second roll and being flung therefrom.
A method for preventing accumulation of liquid at an end edge of a first generally cylindrical rotating roll having opposite end edges and disposed parallel to and spaced a predetermined distance from a second generally cylindrical rotating roll operative to transfer to the outer peripheral surface of the first roll liquid carried on the outer peripheral surface of the second roll so as to form a metered liquid layer on the first roll during rotation of the first and second rolls, and wherein the first roll is rotatable at a speed which may cause liquid accumulated at said end edges to be slung off, said method comprising the steps of establishing a stationary surface in substantially coextensive relation to the outer cylindrical surface of said end edge of said first roll and in predetermined spaced relation to said end edge, and positioning said second roll such that an end edge thereof extends beyond said end edge of said first roll in juxtaposed relation to said stationary surface so that said second roll and said stationary surface cooperate to prevent liquid from accumulating at said end edge of said first roll and thereby prevent slinging of liquid from said end edge of said first roll during rotation thereof.
A static ring assembly for use with a roll rotatable about its longitudinal axis and having an outer peripheral surface and at least one generally planar end surface, said ring assembly including an annular static ring member having an outer peripheral surface of substantially similar size and configuration to the outer peripheral surface of said roll, said ring member defining an annular sealing surface, and a holder member having a first portion operative to support said ring member and having a second portion enabling mounting of said holder member on a support shaft spaced from the rotational axis of said roll such that said ring member is disposed in stationary coaxial relation with said roll and said annular sealing surface is spaced a predetermined distance from said planar end surface on said roll so as to prevent liquid on the outer peripheral surface of said roll from migrating onto said end surface thereof.
Dependencies are inferred from the claim text.