Depilatory Wax Applicator with Controlled Heating and Slide Dispensing

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Solution Overview

Problem

Existing depilatory wax applicators are difficult for laypersons to use safely and efficiently at home due to temperature control issues, wax adherence, and the need for additional disposable aids, leading to potential emissions and inefficiencies.

Innovation Solution

A temperature-controlled applicator with a heating unit and slide mechanism for applying molten depilatory wax directly to the skin without additional aids, ensuring safe and residue-free removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If wax is heated in open pots on stovetops or hotplates, then the wax melts and can be applied, but paraffin and/or wax vapors are released into the room and air we breathe

Engineering Contradiction:
Improvewax melting temperatureVSAvoidwax vapors
Core Design Contradiction:
TemperatureVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a heated applicator as an intermediary device between the heat source and the wax. The applicator is heated to a controlled temperature and then used to melt the wax locally during application, eliminating the need for open pot heating and preventing wax vapor release into the room.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts the harmful heating process from the application process. Instead of heating wax in open containers, the heating function is separated and integrated into the applicator device, which controls melting locally at the application point, thereby removing the source of harmful vapors from the environment.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If wax is applied with a spatula, then the wax can be applied to the skin, but the application is time-consuming and requires a lot of experience to achieve the right layer thickness

Engineering Contradiction:
Improvewax applicationVSAvoidapplication time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The applicator is designed to automatically control the wax application process. The heated applicator melts and applies the wax in the correct amount automatically, eliminating the need for user skill in controlling layer thickness and removing the time-consuming manual spreading process.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent changes the physical state and temperature parameters of the wax during application. By controlling the temperature of the applicator and the resulting viscosity of the wax, the system automatically achieves the optimal application parameters without requiring user expertise or time for manual adjustment.

Inventive Principle:
Principle #35Parameter changes

3Strength

If reinforcing strips are pressed into the wax strip, then the wax layer gains the strength required to be pulled off the skin, but additional disposable items are used up and have to be disposed of

Engineering Contradiction:
Improvewax strip strengthVSAvoiddisposable reinforcing strips
Core Design Contradiction:
StrengthVSLoss of substance

Solution Approach 1:

The patent removes the reinforcing strip component from the system entirely. By controlling the wax composition and application temperature, the wax itself gains sufficient structural strength to be pulled off the skin without any additional reinforcing materials, eliminating the need for disposable strips.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent modifies the physical and chemical parameters of the wax composition and application process. By adjusting the wax formula and application temperature, the wax achieves optimal strength characteristics that eliminate the need for external reinforcing elements, thereby reducing waste from disposable items.

Inventive Principle:
Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient, safe, and residue-free hair removal at home by laypersons, minimizing emissions and reducing the use of disposable items.

Implementation Method 1

a heating unit, wherein the meltable solid can be melted by the heating unit to the melting temperature

Methodology Applied
Scientific EffectMelting: Melting

Implementation Method 2

maintaining it in a molten state at melting temperature

Methodology Applied
Scientific EffectHeating: Heating

Data Source

PatentEP4620349A1Applicator for melting and maintaining at melting temperature a meltable solid and for applying the melted solid as depilatory composition
Publication Date: 2025.09.24 WAX IN THE CITY
  • EP4620349A1 patent drawingFigure 1
  • EP4620349A1 patent drawingFigure 2
  • EP4620349A1 patent drawingFigure 3

AI summary

The invention relates to an applicator for melting and maintaining at melting temperature a meltable solid and for applying the melted meltable solid as a depilatory composition, a system comprising one or more such applicators and a base station suitable for receiving the applicator or a plurality of applicators, a meltable solid,which can be applied in molten form as a depilatory composition to the surface using the applicator, and a method for epilating a surface with a depilatory composition using the applicator according to the invention and the meltable solid for preparing the depilatory composition. An applicator according to the invention for melting a meltable solid and maintaining it at melting temperature, as well as for applying the molten meltable solid as a depilatory composition to a surface, comprises a substructure for accommodating a storage unit for the meltable solid or the depilatory composition, with an actuating device, wherein the storage unit has a heating unit, wherein the applicator according to the invention further comprises a housing for accommodating the substructure with a first end, wherein the housing has an application area at its first end,wherein a closure element of a slider is arranged inside the storage unit, wherein the slider is movable between a closed position and an open position via the actuating device, wherein the meltable solid in a molten state as a hair removal composition can be brought from the storage unit into the application area when the slider is in the open position and can be applied to the surface through the application area.