Toothbrush with injection-moulded bristles and method and apparatus for producing the same
AssigneeTrisa Holding AG
InventorsRoger Kirchhofer, Peter Zurfluh, Michael Schar
Life of this patent
Estimating the term…
Abstract
The brush according to the invention has a bristle carrier, which is produced by injection molding, and bristles, which are produced from a bristle material likewise by injection molding. The bristle carrier is provided with at least one distributing channel for the bristle material. The bristles are formed integrally with the bristle material in the distribution channel.
Claims35
A toothbrush having a bristle carrier with a front side and a rear side, which is produced using the injection molding method and having injection-molded bristles which protrude from the bristle carrier, are produced from a bristle material using the injection molding method and have a bristle stem,
- wherein the bristle carrier has on its rear side at least one channel-like indentation for the bristle material, and a number of the injection-molded bristles are realized integrally with the bristle material in the channel-like indentation,
- wherein the bristle carrier has on its front side a surface layer produced from the bristle material and wherein further injection-molded bristles are realized integrally with the surface layer and protrude from said surface layer.
A toothbrush, comprising:
- a bristle carrier with a front side and a rear side that is produced using the injection molding method;
- and
- injection-molded bristles that are produced from a bristle material using the injection molding method and have a bristle stem,
- wherein the bristle carrier has a surface layer integrally molded from the bristle material on the front side of the bristle carrier and connected by passages through the bristle carrier to the rear side of the bristle carrier, and
- wherein the injection-molded bristles are connected to and protrude from the surface layer on the front side of the bristle carrier.
A toothbrush, comprising:
- an injection-molded bristle carrier with a front side and a rear side and being made of a hard material;
- and
- injection-molded bristles that are made from a bristle material being softer than the hard material of the bristle carrier and the bristle material being mechanically, non-releasably connected by means of positive locking to the bristle carrier without forming a material bond with the hard material of the bristle carrier,
- wherein the bristle material forming a surface layer is integrally molded on the front side and on the back side of the bristle carrier and is connected by passages in the bristle carrier, and
- wherein the injection-molded bristles protrude from the front side of the bristle carrier.
Dependencies are inferred from the claim text.