Optimized internally-fed high-speed rotary printing device
US9085130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F31/26
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
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:where Pout=static pressure of the fluid channel at the web substrate contacting surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.