Brush head arrangements

Patent metadata

Field	Value
Publication number	US-11540621-B2
Application number	US-201816629334-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Jul 12, 2017
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A brush head ( 100 ) and a method of making a tuft spike ( 20 ) and a brush head with a plurality of tuft spikes. The brush head includes a matrix ( 30 ) having a plurality of receptacles ( 32 ) formed therein. A plurality of tuft spikes are each formed of a plurality of bristle strands ( 22 ) arranged in a tuft ( 21 ) having a free end ( 25 ) and a proximal end ( 23 ) inserted in a spike body ( 24 ). Each tuft spike is disposed in one of the receptacles of the matrix. A brush head neck ( 40 ) has a distal platen ( 42 ) that is connected to and at least partially encompassed in the matrix.

First claim

What is claimed is:

1. A method for manufacturing a brush head assembly, the method comprising the steps of:
molding a plurality of spike bodies in a mold;
inserting a plurality of bristle strands arranged as a tuft through an opening of each spike body;
adjusting a free end of each tuft, a proximal end opposite to the free end, or both the free end and the proximal end; and
bonding the proximal end of the tuft to the spike body;
forming a matrix around a platen of a neck of the brush head assembly, wherein the forming includes forming the matrix with a plurality of receptacles; and
injecting the tuft spikes into the matrix such that the proximal end of the tuft spikes are retained in the matrix with the free end of the tuft spikes external to the matrix, wherein the injecting includes injecting the spike bodies of the tuft spikes into the receptacles, wherein each receptacle comprises a restriction having a first dimension and each spike body comprises a retaining feature having a second dimension larger than the first dimension, wherein the injecting includes inserting the retaining feature past the restriction.

2. The method of claim 1 , wherein the adjusting includes positioning the spike body in the mold, positioning a shape plate beneath the mold to define the free end of the bristle strands that extend out from the spike body.

3. The method of claim 1 , wherein the adjusting includes positioning the spike body in the mold, positioning a cutting plate on the mold at the proximal end of the tuft spikes, and cutting an excess portion of the bristle strands that extend above the cutting plate with a knife.

4. The method of claim 1 , wherein the bonding includes applying a temperature sufficient to at least partially melt the spike body and proximal end of the bristle strands together utilizing a melting pin of a melting unit, heated air, laser welding, or a combination including at least one of the foregoing.

Assignees

• Koninklijke Philips Nv

Inventors

• Varch Martin

Classifications

• A46B7/042

  Clip or snap connection for bristle carriers · CPC title

• A46D9/02

  Cutting; Trimming · CPC title

• A46B2200/1066

  Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04) · CPC title

• A46D3/08

  Parts of brush-making machines · CPC title

• A46B7/04

  interchangeably {removable bristle carriers} · CPC title