# US 9,427,767 B2 · Apparatus for applying coating liquid and coating bar

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- Number: US 9,427,767 B2
- Document ID: US9427767B2
- Status: Granted
- Kind: B2
- Application number: 13/754,184
- Filed: 2013-01-30
- Published: 2013-08-29
- Granted: 2016-08-30
- Earliest claimed: 2012-02-23
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Corporation
- Inventors: Shuzo Tsuchida; Isao Muragisi; Akihiro Horikawa
- Web page: https://patentgrep.com/patent/US9427767B2

## CPC

- B05C 11/025: {with an essentially cylindrical body, e.g. roll or rod}
- B05C 5/0254: {Coating heads with slot-shaped outlet (B05C5/0283 takes precedence)}
- 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)

## Abstract

A coating bar 1 in a coating apparatus includes grooves 2 that are formed, on the surface of a cylindrical shaft, from a contact point between the coating bar 1 and a substrate 3 in a traveling direction and a direction opposite to the traveling direction, and are arranged in the width direction of the shaft. Thus, a uniform film can be stably applied to the curved or wavy substrate 3 having high rigidity.

## Claims

### Claim 1

A coating bar comprising a cylindrical body drawn to spread a coating liquid in a scraping manner on a substrate to be coated with a thin film,
wherein the coating bar comprises a plurality of grooves extending linearly in a circumferential direction on a surface of the cylindrical body over a coating width,
each of the grooves is shorter than a circumference of the cylindrical body in cross section, and a groove non-forming region is between one end of the groove and another end of the groove, and
each of the grooves extends in a direction orthogonal to a longitudinal axis of the cylindrical body along the entire length of the grooves.

### Claim 2 (depends on 1)

The coating bar according to claim 1, wherein the grooves are defined by:
a wire circular in cross section, wrapped around a cylindrical core; and
a coating material partially covering gaps between turns of the wire by partially coating the wire, and
a region exposed from the coating material in the gaps serves as the groove.

### Claim 3 (depends on 2)

The coating bar according to claim 2, wherein the coating material is one of resin and rubber.

### Claim 4 (depends on 2)

The coating bar according to claim 2, wherein the coating material is rubber and moves on the surface of the cylindrical body in a circumferential direction of a circular section of the cylindrical body.

### Claim 5 (depends on 1)

The coating bar according to claim 1, wherein the cylindrical body has a diameter of 2 mm to 6 mm in cross section.

### Claim 6 (depends on 2)

The coating bar according to claim 2, wherein the cylindrical body has a diameter of 2 mm to 6 mm in cross section.

### Claim 7 (depends on 1)

The coating bar according to claim 1, wherein the groove has one end from 90° to 120° in a first direction and an other end from an angle larger than 0° to 60° in a second direction opposite to the first direction, with respect to a straight line connecting an axis of the cylindrical body to a contact point on the surface of the cylindrical body that comes into contact with the substrate when the cylindrical body is drawn.

### Claim 8 (depends on 2)

The coating bar according to claim 2, wherein the groove has one end from 90° to 120° in a first direction and an other end from an angle larger than 0° to 60° in a second direction opposite to the first direction, with respect to a straight line connecting an axis of the cylindrical body to a contact point on the surface of the cylindrical body that comes into contact with the substrate when the cylindrical body is drawn.

### Claim 9 (depends on 1)

The coating bar according to claim 1, wherein in an end region of the groove, the groove decreases in depth toward an end of the groove.

### Claim 10 (depends on 1)

A coating apparatus comprising:
a substrate holding stage that holds a substrate;
a dispenser mechanism that supplies a coating liquid onto the substrate in a width direction of the substrate; and
the coating bar according to claim 1,
wherein the coating bar does not rotate the cylindrical body and comes into contact with the substrate only on a specific contact point located on a space between the grooves on an outer surface of the cylindrical body.