Stamped brush heads and brush head stamping manufacturing methods

Patent metadata

Field	Value
Publication number	US-11457725-B2
Application number	US-201816629329-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Jul 12, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A brush head (10) and a method (200) for manufacturing a brush head. The method (200) includes stamping (220) a plurality of openings (62) into a strip or roll of backing material (60). A bristle tuft (21) is inserted into each of the openings in the backing material. A proximal end (23) of each bristle tuft is bonded to a proximal side (63) of the backing material to create a merged proximal end head portion (26). Excess portions of the backing material are removed to form a plurality of carrier elements (24) about the openings from the backing material. The carrier elements form a plurality of merged tuft assemblies (20). A platen (42) of a neck (40) is positioned in relation to the merged tuft assemblies. A matrix material (30) is injected around the platen and the merged tuft assemblies to at least partially encompass the platen and the carrier elements of the merged tuft assemblies.

First claim

What is claimed is:

1. A method for manufacturing a brush head, the method comprising the steps of:
stamping a plurality of openings into a backing material;
inserting at least one bristle tuft into each of the openings in the backing material;
bonding a proximal end of each bristle tuft to at least a portion of proximal side of the backing material to create a merged proximal end head portion that secures the bristle tuft to the backing material to form a merged tuft assembly;
cutting at least one carrier element comprising at least one merged tuft assembly from the backing material;
positioning a platen of a neck in relation to the at least one carrier element of merged tuft assemblies; and
injecting a matrix material around the platen and the carrier element of merged tuft assemblies such that the matrix material at least partially encompasses the platen and the carrier elements of the merged tuft assemblies.

2. The method of claim 1 , further comprising providing the backing material from a roll, a strip, or a combination including at least one of the foregoing.

3. The method of claim 1 , wherein the plurality of openings cut or stamped into the backing material can be of differing shapes, sizes, or both.

4. The method of claim 1 , wherein the step of bonding includes applying heat to melt the proximal end of bristle tufts and at least a portion of the proximal side of the backing material together.

5. The method of claim 4 , wherein the bristle tufts and the backing material are made of a same or similar material having the same or a similar melting point.

6. The method of claim 1 , further comprising a step of adjusting the proximal end of the bristle tufts, a free end of the bristle tufts opposite to the proximal end, or both that occurs before the bonding step.

7. The method of claim 1 , further comprising a step of removing at least one excess portion of the backing material that occurs before the bonding step.

8. The method of claim 1 , further comprising a step of removing at least one excess portion of the backing material that occurs after the bonding step.

9. The method of claim 1 , wherein the removing includes forming a tuft carrier web or a tuft carrier plate that comprises a plurality of carrier elements interconnected together.

10. The method of claim 9 , wherein the tuft carrier web or tuft carrier plate comprises the plurality of merged tuft assemblies interconnected together after the merged tuft assemblies are formed.

Assignees

• Koninklijke Philips Nv

Inventors

• Varch Martin
• Meidl Michael
• Kopeinig Florian

Classifications

• A46B3/06

  by welding together bristles made of metal wires or plastic materials · CPC title

• A46D3/00 Primary

  Preparing, {i.e. Manufacturing} brush bodies · CPC title

• A46B9/04 Primary

  {Arranged like in or} for toothbrushes · CPC title

• A46D3/08

  Parts of brush-making machines · CPC title

• A46B2200/1066

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