US Patent No: 6,695,414

Number of patents in Portfolio can not be more than 2000

Method of manufacturing a brush head by way of an injection molding process

ALSO PUBLISHED AS: 20010013152




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The present invention relates to a method of manufacturing a brush head comprising a brush head body carrying bristle bundles, in particular for tooth brushes, by way of injection molding, in which a first plastic component is injected into a first mold cavity for forming a bristle carrier, and ends of bristle filaments projecting into the first mold cavity are encompassed by the first plastic component. In order to guarantee a complete filling of the mold and a favorable reproduction of the mold cavity geometry, but to avoid at the same time a penetration of plastic mass into ducts in which the bristle filaments are held, it is suggested by the present invention that the bristle carrier manufactured during the first step is relocated into another mold cavity, which is larger than the bristle carrier, and which is filled with a hard component. The present invention further relates to a brush head, in particular for a tooth brush, comprising at least one brush head body carrying a bristle bundle in which the fixing-sided ends of bristle filaments are embedded by an over-molding, wherein it is suggested according to the invention in order to provide a brush head complying with the above-mentioned demands, that the brush body comprises a bristle carrier encompassing the bristle filaments on the attachment side, the bristle carrier being embedded into a hard component.

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Patent Owner(s)

Patent OwnerAddressTotal Patents

International Classification(s)

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Inventor Name Address # of filed Patents Total Citations
Broecker, Gerd Neustadt, DE 6 27
Meyer, Berthold Neustadt, DE 14 226

Cited Art Landscape

Patent Info (Count) # Cites Year
5,054,154 Toothbrush with flexible head 150 1989
5,458,400 Method of manufacturing of brushes, in particular, tooth brushes 19 1994
6,311,360 Brush and method of producing the same 43 1998
Coronet-Werke Heinrich Schlerf GmbH (1)
5,045,267 Process and apparatus for producing bristle articles 9 1989
5,761,759 Toothbrush and method for making such toothbrush 82 1995

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
8,161,592 Cleaning implement 0 2006
D572013 Broom body 5 2006
D572014 Broom body 2 2006
8,485,611 Cleaning implement 0 2012
D688875 Cleaning element for a toothbrush or the like 0 2011
6,919,038 Method of producing thick-walled brushes, in particular toothbrushes 22 2003

Maintenance Fees

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 24, 2015
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00