Coating apparatus – Immersion or work-confined pool type – Work-confined pool
Patent
1996-08-16
1998-10-13
Lamb, Brenda A.
Coating apparatus
Immersion or work-confined pool type
Work-confined pool
118419, B05C 302
Patent
active
058206744
ABSTRACT:
Coating devices for application of coating material to the surface of a web or a flexible substrate utilizing the study of flow patterns in blade coating to develop high-speed coaters, wherein the coater may be modified to provide an air layer between the coating liquid and any lower boundary. The coater devices of the described embodiments provide two inlet channels and an outlet channel. The first inlet channel carries the coating liquid, and the second channel can be used to pump the carrier fluid, e.g. air, into the coating head to pressurize the chamber and to keep the contact wetting line at the upstream section attached to the substrate. The air layer serves as a carrier fluid removing the wall shear stress on the coating liquid in the channel, and thus the coating flow for the operation of the device may proceed without flow separation from the wall (i.e., in a vortex-free mode) at relatively low flow rates appropriate for commercial applications. The excess coating liquid and all of the air leave the coater head at the outlet channel. A coating composition application chamber receives the liquid flow of the liquid coating composition from the upstream direction to the downstream direction. The coating composition application chamber is adapted for receiving a liquid flow of a carrier fluid introduced at the upstream side of the application chamber in the direction of the travel of the web positioning the liquid flow of the liquid coating composition between the carrier fluid and the web.
REFERENCES:
patent: 3083685 (1963-04-01), Colgan
patent: 3113884 (1963-12-01), Kohler
patent: 3418970 (1968-12-01), Phelps et al.
patent: 3690917 (1972-09-01), Hershoff et al.
patent: 4102299 (1978-07-01), Wallsten
patent: 4250211 (1981-02-01), Damrau et al.
patent: 4369731 (1983-01-01), Damrau
patent: 4387663 (1983-06-01), Alheid
patent: 4452833 (1984-06-01), Holt
patent: 4643127 (1987-02-01), Wanke
patent: 4688516 (1987-08-01), Sommer
patent: 4834018 (1989-05-01), Sollinger et al.
patent: 4836134 (1989-06-01), Knop
patent: 4839201 (1989-06-01), Rantanen et al.
patent: 4858553 (1989-08-01), Westergard et al.
patent: 4873939 (1989-10-01), Eskelinen
patent: 4880671 (1989-11-01), Sollinger et al.
patent: 4920913 (1990-05-01), Knop et al.
patent: 4945855 (1990-08-01), Eklund et al.
patent: 5173120 (1992-12-01), Suzummura et al.
patent: 5354376 (1994-10-01), Aidun
patent: 5366551 (1994-11-01), Aidun
Rudolph Beisswanger & Dr. Ing. Hans-Peter Sollinger, "Coating Paper and Board, Practical Experience with the SDTA and LDTA," from TAPPI Seminar Notes, 1986 Blade Coating, pp. 137-142.
E. W. Wight, "Modern Coating Application and Blade Metering Systems," from TAPPI Seminar Notes, 1986 Blade Coating, pp. 105-108.
Herbert Sommer, "Application Systems for Coating ULWC and MFP Papers," from TAPPI Proceedings, 1988 Coating Conference, pp. 131-137.
F. R. Pranckh & L. E. Scriven, "Elastohydrodynamics of Blade Coating," AIChE Journal, vol. 36, No. 4, pp. 587-597, Apr. 1990. (Best Copy).
N.G. Triantafillopoulos & C. K. Aidun, "Relationship Between Flow Instability in Short-Dwell Ponds and Cross Directional Coat Weight Nonuniformities," reprinted from TAPPI Journal, vol. 73, No. 6, pp. 127-136, Jun., 1990.
Cyrus K. Aidun, "Principles of Hydrodynamic Instability: Application on Coating Systems; Part 1. Background," reprinted from TAPPI Journal, vol. 74, No. 2, pp. 213-219, Feb., 1991.
Cyrus K. Aidun, "Principles of Hydrodynamic Instability: Application on Coating Systems; Part 2. Examples of Flow Instability," reprinted from TAPPI Journal, vol. 74, No. 3, pp. 213-220, Mar., 1991.
Cyrus K. Aidun, "Principles of Hydrodynamic Instanbility: Application on Coating Systems; Part 3. A Generalized View of Instability and Bifurcation," reprinted from TAPPI Journal, vol. 74, No. 4, pp. 209-213, Apr., 1991.
Cyrus K. Aidun, N. G. Triantafillopoulos and J. D. Benson, "Global Stability of a Lid-Driven Cavity With Throughflow: Flow Visualization Studies," from Phys. Fluids A, vol. 3, No. 9, American Institute of Physics, pp. 2081-2091, Sep., 1991.
J. D. Benson and C. K. Aidun, "Transition to Unsteady Nonperiodic State in a Through-Flow Lid-Driven Cavity," from Phys. Fluids A, (Brief Communications) vol. 4, No. 10, American Institute of Physics, pp. 2316-2319, Oct., 1992.
Institute of Paper Science and Technology, Inc.
Lamb Brenda A.
LandOfFree
Vortex-free coating device for traveling webs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vortex-free coating device for traveling webs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vortex-free coating device for traveling webs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-309447