Loading patent…
AssigneeThe Procter & Gamble Company
InventorsHaibin Chen, Thomas Timothy Byrne, Mark Stephen Conroy
Estimating the term…
A rotary device for high-speed printing or coating of a web substrate is disclosed. The printing system provides a gravure roll rotatable about an axis at a surface velocity, ν, and a fluid channel having a pressure drop throughout the fluid channel due to friction, Pf, disposed therein. The fluid channel is disposed generally parallel to the axis at a distance, Rin, relative to the axis. The fluid channel provides fluid communication of a fluid having a fluid vapor pressure, Pv, and a fluid density, ρ, from a first position external to the gravure roll to a web substrate contacting surface of the gravure roll. The web substrate contacting surface is located at a distance, Rout, relative to the axis. Rin is determined from the relationship: R in R out > 1 - 2 ( P out - P v + P f ) ρ v 2 where Pout=static pressure of the fluid channel at the web substrate contacting surface.
A printing system for printing a fluid onto the surface of a web substrate, said printing system comprising a gravure roll rotatable about an axis at a surface velocity, v, and a first fluid having a first fluid vapor pressure, Pv, and a first fluid density, ρ, the gravure roll comprising a fluid channel having a pressure drop throughout said fluid channel due to friction, Pf, disposed therein, said fluid channel being disposed generally parallel to said axis at a distance, Rin, relative to said axis, said fluid channel providing fluid communication of said first fluid from a first position external to said gravure roll to a web substrate contacting surface of said gravure roll, said web substrate contacting surface being located at a distance, Rout, relative to said axis, and wherein said Rin is determined from the relationship:
A printing system for printing a fluid onto the surface of a web substrate, said printing system comprising a gravure roll rotatable about an axis at a surface velocity, v, and a first fluid having a first fluid vapor pressure, Pv, and a first fluid density, ρ, the gravure roll comprising a fluid channel having a pressure drop throughout said fluid channel due to friction, Pf, disposed therein, a portion of said fluid channel being disposed at a distance, Rin, relative to said axis, said fluid channel providing fluid communication of said first fluid from a first position external to said gravure roll to a web substrate contacting surface of said gravure roll, said web substrate contacting surface being located at a distance, Rout, relative to said axis, and wherein said Rin is determined from the relationship:
Dependencies are inferred from the claim text.