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04-03-2019

METHOD OF MAKING A UNITARY BRUSH HEAD AND UNITARY TOOTHBRUSH HEAD

METHOD OF MAKING A UNITARY BRUSH HEAD AND UNITARY TOOTHBRUSH HEAD (© European Patent Office)

The present application is concerned with a method of manufacturing a unitary brush head, in particular a unitary toothbrush head, the unitary brush head having a base and at least one filament extending from a filament side of the base, the method comprising the steps of injecting molten plastic material into a mold cavity having a pre-base cavity and at least one filament cavity extending from the pre-base cavity, compressing the molten plastic material once it is essentially filling the pre-base cavity by impressing at least one punching tool into the molten plastic material from the rear side of the pre-base cavity being opposite to a side from which the at least one filament cavity extends, and filling the at least one filament cavity with the molten plastic material under the continuous impression of the punching tool. The molten plastic material in particular has a melt flow rate of about 30 g/10 min or lower measured in accordance with ISO 1133. The present invention is also concerned with a brush having a unitary brush head.

Document: EP3461367A1
Click here for the full patent text at DEPATISnet [PDF]
Published patent application
Disclosure date: 09-28-2017
Publication date: 04-03-2019
Applicant: PROCTER & GAMBLE, US
Inventor: EIMANN KLAUS, DE ; GÖRICH GERALD, DE ; GÖTZ NICOLAS, DE ; SCHNIZER HARALD, DE


© European Patent Office. This information was obtained from the espacenet of the European Patent Office. There is no guarantee of its correctness or curency. For additional information, please use the research at espacenet. It is possible to determine the current legal and procedural status of patents and utility patents/models at http://worldwide.espacenet.com/ kfree of charge.

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