Brush head manufacturing method and device

Patent metadata

Field	Value
Publication number	US-11497302-B2
Application number	US-201816757266-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Oct 24, 2017
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A method (500) for manufacturing a brush head (10). The method includes the steps of providing a plurality of bristle tuft retention elements (52), and inserting a bristle tuft (21) into each of the bristle tuft retention elements; using a heat reflection device (200) to evenly apply heat to at least partially melt the bristle tuft proximal end and, optionally, the retention element, create proximal end head portion (26) to retain the bristle tuft in the retention element.

First claim

What is claimed is:

1. A method for manufacturing a brush head, the method comprising the steps of:
inserting a plurality of bristle tufts into a tuft carrier, wherein a proximal end of each bristle tuft is inserted into a different opening of the tuft carrier;
activating a heat reflection device having at least one heating element and at least one heat reflecting surface therein, wherein the heat reflection device comprises multiple sides to at least partially contain the heat generated by the heating element, and an opening that can be used to insert or remove the entire tuft carrier with the inserted plurality of bristle tufts within the heat reflection device to be heated by the heating element;
placing the tuft carrier with the inserted plurality of bristle tufts into the heat reflection device;
directing heat from the at least one heating element toward the tuft carrier with the inserted plurality of bristle tufts to at least partially melt the proximal end of each of the plurality of bristle tufts each bristle tuft; and,
cooling the melted proximal end head portion.

2. The method of claim 1 wherein the tuft carrier is positioned on a tooling plate prior to being placed into the heat reflection device.

3. The method of claim 1 , further comprising at least one bristle tuft retention element, wherein the at least one bristle tuft retention element and bristle tufts are made of the same material or a similar material having a similar melting temperature such that the melting of the placing step partially melts and merges the proximal end of each of the plurality of bristle tufts and at least a portion of a proximal side of the at least one bristle tuft retention element together to create the proximal end head portion.

4. The method of claim 1 wherein the heating element or the at least one heat reflecting surface is at least partially adjustable in height and/or angle with respect to the tuft carrier within the heat reflection device.

5. The method of claim 1 wherein the heating element is a hot air heat source or an electrically driven helical heating element.

6. The method of claim 1 wherein the temperature of the heat generated by the heating element is controllable and adjustable.

7. The method of claim 1 wherein the heat reflection device further has at least one door that can be used in the opening that can be opened to insert or remove the tuft carrier in the heat reflection device to help further contain the heat generated by the heating element in the heat reflection device.

8. The method of claim 1 wherein the step of placing the tuft carrier within the heat reflection device is performed by a transport mechanism arranged to move the tuft carrier from outside the heat reflection device to inside the heat reflection device.

9. The method of claim 8 wherein the step of cooling the melted proximal end head portion is accomplished by moving the at least one tooling plate or tuft carrier from inside the heat reflection device to outside the heat reflection device.

10. A method for manufacturing a brush head, the method comprising the steps of:
inserting a plurality of bristle tufts into a tuft carrier, wherein a proximal end of each bristle tuft is inserted into a different opening of the tuft carrier;
activating a heat reflection device having at least one heating element and at least one heat reflecting surface therein, wherein the heat reflection device has: (i) at least one opening that can be used to insert the tuft carrier with the inserted plurality of bristle tufts into the heat reflection device; and (ii) at least one door that can be used in the at least one opening that can be opened to insert or remove the tuft carrier;
placing the tuft carrier with the inserted plurality of bristle tufts into the heat reflection device;
directing heat from the at least one heating element toward the tuft carrier with the inserted plurality of bristle tufts to at least partially melt the proximal end of each of the plurality of bristle tufts to create a proximal end head portion for each bristle tuft; and
cooling the melted proximal end head portion.

Assignees

• Koninklijke Philips Nv

Inventors

• Meidl Michael
• Varch Martin

Classifications

• A46D3/045 Primary

  for fixing bristles by fusing or gluing to a body · CPC title

• A46D3/04 Primary

  Machines for inserting or fixing bristles in bodies · CPC title

• A46B2200/1066

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

• A46D3/047

  for clamping or gluing bristles into rings, e.g. paint brushes, brooms · CPC title