US 11,484,908 B2Granted

Web lifter/stabilizer and method

AssigneeDürr Systems AG

InventorsKim A. Anderson, Eric Maki, George Glenn

Life of this patent

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Abstract

Web lifter and/or stabilizer and method of lifting and/or stabilizing a travelling web and for coating a web. The device creates a web hold down force via a negative pressure slot at its exit side, which draws the web down against the surface on the entry side. The device can be actuated to move the web relative to a slot die coater off the die lips and stop the application of slurry to the web, thereby creating uncoated regions on the web surface. The device can then be actuated to move the web back into contact with the coater to start the application of slurry to the web, thereby creating coated regions on the web surface. Web lifting can be accomplished by rotating the device in first and second directions to lift the web off of the slot die coater and return the web back into contact with the coater.

Claims13

Dependent claims

A method of applying a coating to a web using a system comprising a supply valve, a bypass valve, a free span slot die coater having die lips, a web lifter and a controller to control said supply valve, said bypass valve and said free span slot die coater, said method comprising:

inputting to said controller the reference positions on said web where said supply valve is to open and close;
inputting to said controller the reference positions on said web where said bypass valve is to open and close;
inputting to said controller the reference positions on said web where said web lifter is to be actuated to move said web toward and way from said free span slot die coater;
moving said web past said free span slot die coater;
tracking the position of said web;
and
using said controller to control said supply valve, said bypass valve, said free span slot die coater and said web lifter based on said inputted reference positions to lift said web off said die lips of said free span slot die coater and stop the application of coating to said web to create uncoated regions on said web, and to move said web into contact with said die lips of said free span slot die coater and initiate the application of coating to said web to deposit said coating on said web to create coated regions on said web.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/659,617Filed 13 Nov 2019 · division
Priority: 3 Jun 2011
Published: US 2020/0061663 A127 Feb 2020
Granted: 1 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B05D 1/02
Processes for applying liquids or other fluent materials: performed by spraying
B65H 23/245
By fluid action, e.g. to retard the running web: suction retarders
B05B 12/02
Arrangements for controlling delivery; Arrangements for controlling the spray area: for controlling time, or sequence, of delivery
B05C 3/132
For treating work of indefinite length: supported on conveying means

Family

Application61/493,046Us provisional application · filed 3 Jun 2011
PCT/US2012/040667Parent of this division · filed 4 Jun 2012
US 2020/0061663 A1Pre-grant publication · published 27 Feb 2020
Application14/122,753Parent of this division
US 10,478,853 B2Parent of this division
US 2014/0120258 A1Published application
US 11,484,908 B2This patent

From the US filing history. Foreign family members aren’t listed.