# US 12,214,373 B2 · Apparatus and method for processing shear sensitive coating compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,214,373 B2 - Document ID: US12214373B2 - Status: Granted - Kind: B2 - Application number: 17/260,030 - Filed: 2019-07-18 - Published: 2021-10-07 - Granted: 2025-02-04 - Earliest claimed: 2018-07-31 - Assignees: OLBRICH GmbH - Applicants: Olbrich GmbH - Inventors: Ingo Volmering; Fabian Schindler; Frans Te Welscher - Web page: https://patentgrep.com/patent/US12214373B2 ## CPC - B05C 1/086: {a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith} - B05C 1/0813: {characterised by means for supplying liquid or other fluent material to the roller} - B05C 1/083: {being passed between the coating roller and one or more backing rollers} - B05C 11/1039: {Recovery of excess liquid or other fluent material; Controlling means therefor} - B05D 1/28: performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers - B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) ## Abstract The invention relates to a device for processing shear-sensitive coating compounds (100), with a transfer roller (1) and a doctor blade (2), in particular a comma doctor blade, which are spaced apart from one another to form a coating nip (3), the device further having an outlet nozzle (4) for dosing a coating compound (100), the outlet nozzle (4) facing a lower nip opening (6) of the coating nip (3) with its nozzle opening (5), wherein the device comprises a forced conveying system (7) via which a coating compound (100) is dosed into the coating nip (3), the transfer roller (1) and the doctor blade (2) being arranged next to each other, so that the coating nip (3) is permeable in the vertical direction (z), wherein the coating nip (3) is between 30 and 400 μm and the outlet nozzle (4) is an outlet of a rinsing chamber (8) arranged below the coating nip (3). A corresponding method is also described. ## Claims ### Claim 1 An apparatus for processing shear-sensitive coating compounds, comprising: a transfer roller; a doctor blade, wherein the doctor blade is spaced apart from the transfer roller to form a coating nip; an outlet nozzle for dosing a coating compound, wherein the outlet nozzle comprises a nozzle opening configured to face a lower nip opening of the coating nip; and a forced conveying system via which a coating compound is dosed into the coating nip, wherein the transfer roller and the doctor blade are arranged next to each other, so that the coating nip is permeable in the vertical direction (z), wherein the forced conveying system is arranged below the doctor blade and the lower nip opening, and wherein the coating nip is between 30 μm and 400 μm and the outlet nozzle is an outlet of a rinsing chamber arranged below the coating nip, wherein a nip seal is formed on an outer side of a boundary wall of the outlet nozzle facing the transfer roller. ### Claim 2 (depends on 1) The apparatus of claim 1 wherein the doctor blade comprises at least a curved hook portion. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the nozzle opening is mounted in front of the lower nip opening without contact, the coating compound being flushed into the coating nip. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the rinsing chamber comprises an inlet for the coating compound. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the rinsing chamber comprises an outer side configured to face the transfer roller and wherein the outside has a recess free discharge contour for the coating compound. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein the rinsing chamber is arranged above a collecting trough from which the coating compound flowing off via the outside of the rinsing chamber into the collecting trough is pumped back into the rinsing chamber. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the coating compound is pumped out of the collecting trough into the rinsing chamber via a pump of the forced conveying system, the pump arranged in a coating compound storage container. ### Claim 8 (depends on 1) The apparatus according to claim 1, wherein a discharge gap for discharge of excess coating compound is formed between the boundary wall of the outlet nozzle on the outer side of the boundary wall facing the transfer roller and the transfer roller. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the nip seal has a distance of 0.01 mm to 0.5 mm from the transfer roller. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein the nip seal is part of a nozzle tip which forms the outlet nozzle on its side opposite the nip seal. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the nozzle tip is horizontally adjustable to adjust the pressure ratio between the nozzle orifice and the nip seal. ### Claim 12 (depends on 1) The apparatus according to claim 1, wherein the components of the rinsing chamber facing the doctor blade are sealed towards the doctor blade and the components of the rinsing chamber facing the transfer roller are designed to be contactless towards the transfer roller. ### Claim 13 (depends on 1) The apparatus according to claim 1, further comprising a mating roller configured to press a material web against the transfer roller. ### Claim 14 (depends on 1) The apparatus according to claim 1, wherein the nip seal has a distance of 0.1 mm to 0.2 mm, from the transfer roller. ### Claim 15 (depends on 1) The apparatus according to claim 1, wherein the coating compound is a flowable material. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein the flowable material is a dispersion or an adhesive.