Device for providing bristles for brush production and providing method

Patent metadata

Field	Value
Publication number	US-10743652-B2
Application number	US-201514600535-A
Country	US
Kind code	B2
Filing date	Jan 20, 2015
Priority date	Feb 6, 2014
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A method for providing bristles for automated production of brushes, in particular toothbrushes or parts thereof may comprise providing a plurality of bristles in a storage container, applying oil to at least a part of the plurality of bristles in the storage container, separating a bristle tuft from the storage and transporting the bristle tuft in a tube using an airflow. The plurality of bristles tufts can be transferred to a providing unit, in which the bristles tufts are arranged in a pre-defined tuft pattern and may be over-molded by injection molding in order to form at least a brush head. A device suitable to perform the method comprises at least an immersion unit to apply oil to bristles and an airflow-using transportation unit.

First claim

What is claimed is:

1. A method of automated production of brushes for toothbrushes or parts thereof, comprising:
(a) providing a plurality of bristles in a storage container;
(b) applying oil to at least a part of the plurality of bristles in the storage container,
wherein the step of applying the oil comprises providing an absorbent, immersing the absorbent with the oil, and contacting at least a part of the plurality of bristles with the immersed absorbent thereby transferring oil from the absorbent to the bristles;

(c) separating two or more bristles from the part of the plurality of bristles to which the oil was applied in order to form a bristle tuft;
(d) transporting at least one of the separated bristle tufts in a tube using an airflow; and
(e) arranging the at least one bristle tuft in a bristle pattern of the brush to be produced.

2. The method according to claim 1 , wherein the oil is applied to the bristles along the bristles' longitudinal axis.

3. The method according to claim 1 , wherein the oil is applied by using at least one of gravity and capillary force.

4. The method according to claim 1 , wherein additives signaling substances or abrasives are added to the oil before the oil is applied to the bristles.

5. The method according to claim 1 , wherein the oil is selected from the group consisting of technical oil, mineral oil, silicone oil, and any combination thereof.

6. The method according to claim 1 , wherein the bristles are pre-treated in a drying oven or microwave before the oil is applied.

7. The method according to claim 6 , wherein the bristles are pre-treated in a microwave in a range of from 500 W to 800 W.

8. The method according to claim 1 , wherein the airflow is produced by blowing or vacuuming.

9. The method according to claim 1 , wherein the bristles are end-rounded at a first end and the oil is applied at a second end of the bristles, the second end being opposite to the first end.

Assignees

• Procter & Gamble

Inventors

• Eimann Klaus
• Schaeffer Marko

Classifications

• A46D3/04

  Machines for inserting or fixing bristles in bodies · CPC title

• A46D3/082 Primary

  Magazines for bristles; Feeding bristles to magazines; Knot picking · CPC title