Tata Steel. has filed a patent for a hot dip coating device that provides a metal coating on a moving metal sheet. The device includes a liquid bath, guide roll, gas knife, and supporting rolls to influence the metal sheet shape. The unique design aims to improve the coating process efficiency. GlobalData’s report on Tata Steel gives a 360-degree view of the company including its patenting strategy. Buy the report here.

Smarter leaders trust GlobalData


Data Insights Tata Steel Ltd - Company Profile

Buy the Report

Data Insights

The gold standard of business intelligence.

Find out more

According to GlobalData’s company profile on Tata Steel, Extraction by leaching was a key innovation area identified from patents. Tata Steel's grant share as of January 2024 was 54%. Grant share is based on the ratio of number of grants to total number of patents.

Hot dip coating device for metal sheet coating

Source: United States Patent and Trademark Office (USPTO). Credit: Tata Steel Ltd

A hot dip coating device for applying a metal coating on a moving metal sheet is disclosed in the filed patent (Publication Number: US20240018639A1). The device includes a container for a liquid bath of metal coating material, a guide or sink roll to guide the metal sheet through the bath, and a gas knife above the bath to project wiping gas on the metal coating. The device features at least four supporting rolls placed above the liquid bath to influence the shape of the metal sheet before it enters the bath. These supporting rolls are movable to influence the crossbow of the metal sheet as it moves, and are configured to contact both sides of the metal sheet alternately to exert bending forces. The device also includes a snout for the metal sheet to enter the bath, with the supporting rolls placed within the snout for easy replacement and maintenance.

Furthermore, the hot dip coating device can be adapted for different types of metal coatings, such as zinc aluminum alloy, zinc magnesium alloy, zinc aluminum magnesium alloy, or aluminum silicon alloy. The gas knife in the device is movable in the length direction of the coating device, with a positioning system to adjust its position relative to the moving metal strip. The guide or sink roll in the liquid bath can be vertically and/or horizontally movable for added flexibility during operation. Overall, the device offers a comprehensive solution for efficiently applying metal coatings on moving metal sheets, with features that enhance the coating process and allow for customization based on the type of metal coating required.

To know more about GlobalData’s detailed insights on Tata Steel, buy the report here.

Data Insights


The gold standard of business intelligence.

Blending expert knowledge with cutting-edge technology, GlobalData’s unrivalled proprietary data will enable you to decode what’s happening in your market. You can make better informed decisions and gain a future-proof advantage over your competitors.


GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies