Coating apparatus

Patent metadata

Field	Value
Publication number	US-9611575-B2
Application number	US-201414202711-A
Country	US
Kind code	B2
Filing date	Mar 10, 2014
Priority date	Mar 28, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

Disclosed is a method for producing a coated substrate using a compact, easy to handle and automated coating apparatus that can prepare coated composite in a single batch process, with sufficient control over each portion of the coating apparatus. The coating apparatus may include a coating unit, a drying unit and a pressing unit sequentially arranged in a single line to produce the coated substrate.

First claim

We claim:

1. A point-of-use coating apparatus comprising:
a coating unit, wherein the coating unit comprises a coating roller and a knife to apply coating onto a substrate, wherein the knife further comprises:
a sharp edged blade and a blunt edged blade which are selectable based on the type of coating application, wherein the coating unit is configured to provide:
a knife on air coating application wherein the sharp edged blade is used for filling the pores of the substrate; and
a knife on roll coating application wherein the blunt edged blade is used for applying a film on the surface of the substrate;

a drying unit placed downstream with respect to the coating unit, wherein the drying unit comprises an insulated chamber for drying the coating applied on the substrate;
a pressing unit placed downstream with respect to the drying unit, wherein the pressing unit comprises a pair of pressing rolls configured to press the substrate; and
a control unit for controlling operations of the coating unit, drying unit, and the pressing unit.

2. The point-of-use apparatus of claim 1 , wherein the coating unit, the drying unit, and the pressing unit are sequentially positioned.

3. The point-of-use coating apparatus of claim 1 , wherein a rubber nip roller is disposed below the coating roller to pull the substrate from an unwind reel.

4. The point-of-use coating apparatus of claim 1 , wherein a sample holder is arranged to be held above the coating roller to keep the coating on the substrate.

5. The point-of-use coating apparatus of claim 1 , wherein the coating roller is made of mild steel with a layer of hard chrome plating.

6. The point-of-use coating apparatus of claim 1 , wherein the sharp edged blade is arranged vertically above the coating roller at an adjustable distance.

7. The point-of-use coating apparatus of claim 1 , wherein the blunt edged blade is arranged vertically above the coating roller at an adjustable angle with respect to the coating roller.

8. The point-of-use coating apparatus of claim 1 , wherein the insulated chamber comprises a galvanized heater and a thermocouple, wherein the galvanized heater and the thermocouple are configured to maintain a temperature range within 25° C. to 200° C.

9. The point-of-use coating apparatus of claim 1 , wherein the drying unit further comprises at least one hot air blower positioned axially to the drying unit for blowing hot air on top and bottom of the substrate.

10. The point-of-use coating apparatus of claim 9 , wherein a control panel is configured to regulate rolling speed of the coating roller and the pair of pressing rolls, and, temperatures of the drying unit and the at least one hot air blower.

11. The point-of-use coating apparatus of claim 1 , wherein a first pressing roll from the pair of pressing rolls is coated with hard chrome plating and a second pressing roll from the pair of pressing roll is coated with rubber.

12. The point-of-use coating apparatus of claim 11 , wherein the second pressing roll is installed over the first pressing roll.

13. The point-of-use coating apparatus of claim 1 , wherein the pair of pressing rolls are provided with a pressure gauge along with a regulator to maintain a binding pressure on the substrate with the coating.

14. The point-of-use coating apparatus of claim 13 , wherein the pressure is maintained approximately up to 7 kg-f/cm 2 .

15. The point-of-use coating apparatus of claim 1 , wherein a dial gauge is used to adjust a distance between the knife and the coating roller.

Assignees

• Tata Consultancy Services Ltd

Inventors

• Maparu Auhin Kumar
• Rai Beena

Classifications

• B05C11/045

  characterised by the blades themselves · CPC title

• B05C11/04 Primary

  with blades · CPC title

• B05C9/14

  the auxiliary operation involving heating {or cooling} · CPC title

• D06B1/14 Primary

  with a roller · CPC title