Conopco, Inc.

Unilever Plc

Unilever, N.v.

Amit Sah

Amit Chakrabortty

Kirtan Shravan Kamkar

Punam Bandyopadhyay

Rudra Saurabh Shresth

Narayanan Subrahmaniam

Suresh Sambamurthy Jayaraman

Richa Sureshchand Goyal

Stephen John Singleton

Ajay Singh Negi

Lalit Kumar

Rachana Sankar

Papiya Bag

The present invention is in the field of tooth cleaning devices, especially electrical toothbrushes. The invention further relates to the use of an air/water jet for the cleaning of teeth. A process for cleaning teeth that incorporates a water jet for cleaning teeth remains to be desired, especially a single device that can be employed to clean teeth and reliably deposit material onto teeth. It is therefore an object of the present invention to provide a process for cleaning teeth with an electrical toothbrush device providing improved cleaning by means of an externally mixed air-water jet wherein the water dosing is not influenced by the air pressure. Surprisingly it has been found that a tooth brush device, comprising an air/water jet, wherein the air and water are mixed outside the nozzle(s), provides improved cleaning of dental surfaces, including inter-proximal areas, with low usage of water.

Process for cleaning teeth

The present invention is in the field of household cleaning tools. The invention further relates to the use of an air-water jet for the cleaning of hardsurfaces. It is an object of the present invention to provide easier cleaning of hard surfaces. It is therefore an object of the present invention to provide a process of easier cleaning of hard surfaces, especially by means of a device that uses a relatively low water flow rate. Surprisingly it has been found that an external mix air-water jet device may be used for cleaning hard surfaces.

Process for cleaning hard surfaces

In particular a porous substrate (FS) like a fabric. Process to clean a substrate, comprising a step of subjecting the substrate to an air-water spray (SPR), generated using a spraying means (N) comprising an air passage (OPA) and a water passage (OPW), wherein air is greater than 90% by volume of the spray, the air velocity is greater than 80 m/s and wherein said air passage does not coaxially surround said water passage. Device to clean soiled fabric (FS) comprising a feed water container (CW) and an air compressor (AC) in fluid communication with a spray nozzle (N) comprising an air passage and a water passage, said device being capable of generating an air pressure in the range of 1 to 3 bar (absolute) and an air velocity greater than 80 m/s at the exit of said nozzle; and the air is greater than 90% volume of said spray, and wherein said air passage does not coaxially surround said water passage. An external mix spray nozzle is especially preferred in the device.

Process and a device to clean substrates

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Bengaluru, India

Amit Sah