Carrier for cleaning elements and method for producing such carriers for use in the production of toothbrush heads

Patent metadata

Field	Value
Publication number	US-9358709-B2
Application number	US-201313920114-A
Country	US
Kind code	B2
Filing date	Jun 18, 2013
Priority date	Jun 19, 2012
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A carrier for providing at least one cleaning element to a mold cavity is disclosed. The carrier includes a main body having a first surface including one or more openings of one or more blind holes having a depth (D) for carrying the at least one cleaning element and a second surface being substantially parallel to the first surface. The main body includes at least two partial bodies which are arranged adjacent to each other in the direction of the one or more blind holes so that at least one partial body comprises one or more through-holes as part of the one or more blind holes and one partial body comprising the second surface of the main body comprises the blind end of the one or more blind-holes.

First claim

What is claimed is:

1. A method of producing at least a part of a brush head comprising providing one end of at least one cleaning element to a mold cavity for over-molding using a carrier and over-molding the provided end with a plastic material,
wherein the carrier comprises a main body having a first surface including one or more openings of one or more blind holes having a depth for carrying the at least one cleaning element and a second surface being substantially parallel to the first surface, wherein the main body includes at least two partial bodies arranged adjacent to each other in the direction of the one or more blind holes so that at least one partial body comprises one or more through holes as part of the one or more blind holes and one partial body comprising the second surface of the main body comprises the blind end of the one or more blind holes, wherein the depth of the one or more blind holes is identical to a free length of the at least one cleaning element and wherein a cross-sectional area of the one or more blind holes increases in the direction of the blind end of the one or more blind holes, and wherein the cleaning elements have ends heated to form a thickening that is flattened by pressing a flattening tool against the thickening until the thickening is in direct contact with the first surface of the carrier, and
moving the first surface of the carrier in the direction of the second surface so that a gap is formed between the thickening and the first surface of the carrier.

2. The method according to claim 1 , wherein the at least two partial bodies are arranged in direct contact to each other.

3. The method according to claim 1 , wherein a gap is located between the at least two partial bodies.

4. The method according to claim 3 , wherein a height (H) of the gap is defined by a spacer.

5. The method according to claim 1 , wherein the one or more blind holes are arranged perpendicular or inclined to the first and second surface of the main body.

6. The method according to claim 1 , wherein the at least two partial bodies are movable in at least one direction along contact surfaces.

7. The method according to claim 1 , wherein at least one of the blind holes is a mold cavity for molding the at least one cleaning element.

8. The method according to claim 1 , wherein the first surface of the carrier includes a recess representing a part of the mold cavity for molding a cleaning element carrier, a brush head or a part thereof.

9. The method according to claim 1 , wherein at least a partial body comprising the first surface consists of steel, ceramic, plastic material or synthetic resin.

10. The method according to claim 1 , wherein a plurality of blind holes is arranged in a pattern that corresponds to the bristle pattern in the brush head to be formed in the mold cavity to which the at least one cleaning element is provided.

11. The method according to claim 1 , wherein the partial body comprising the second surface is a stopper plate.

12. The method according to claim 1 , wherein the cleaning element is formed in at least one of the blind holes of the carrier by injection molding.

Assignees

• Braun Gmbh

Inventors

• Kotitschke Joerg
• Scheurich Stefan
• Tretrop Uwe
• Ganninger Jochen
• Wustrack Ralf

Classifications

• A46D3/005

  by moulding or casting a body around bristles or tufts of bristles · CPC title

• A46D1/00 Primary

  Bristles; Selection of materials for bristles (making artificial bristles D01D, D01F) · CPC title

• B29C45/14778 Primary

  the article consisting of a material with particular properties, e.g. porous, brittle · CPC title

• A46D3/00

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

• A46D3/08

  Parts of brush-making machines · CPC title