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Manufacturing method and apparatus of brush

Image Number 11 for United States Patent #7281768.

A method of manufacturing a brush includes inserting bristles into bristles insertion holes, and implanting the bristles in a resin material. The inserting further includes preparing sleeves corresponding to cross sectional shapes and cross sectional areas of the bristles insertion holes; introducing the bristles into the sleeves; and independently inserting the bristles within each of the sleeves to the corresponding bristles insertion holes.

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