Braun Gmbh

Gillette Canada Company

Ahmet Cem Firatli

Georges Driesen

Armin Schwarz-Hartmann

Rainer Hans

Norbert Schaefer

Mingchih M Tseng

Scott Batson

Helge Zimmet

Gordon Gerald Guay

Rudolf Majthan

Hans-Herbert Fuchs

The invention is directed to a bristle for a toothbrush, particularly for an electric toothbrush, and to a method for its manufacture. The bristle is manufactured from a monofilament () made of plastic. The bristle has in its cross section at least two zones () and at least one point of preferred breaking.

Bristle for a toothbrush, particularly for an electric toothbrush, and method for its manufacture

The invention is directed to a bristle ( ) suitable for use in a brush ( ) or the like, and in particular in a toothbrush. The bristle ( ) is made of a plastic material and includes preferably a circular area of cross-section. When viewed in cross-section, the bristle ( ) includes two sections ( ) with different properties. These sections ( ) are not in concentric relative arrangement. As a result, the bristle ( ) curves along its longitudinal axis. The curvature produces an improved cleaning action of the brush ( ).

Bristle for a toothbrush

The invention is based on the discovery that flocked or textured materials (e.g., for use as dental floss, or toothbrush bristles) can be manufactured without using adhesives to secure the short fibers or texture particles to the base material, or substrate. The flocked or textured materials are formed by thermally or chemically softening a preformed substrate (e.g., sheets, fibers, or filaments made of TEFLON&reg; fibers, KEVLAR&reg; fibers, cotton, polyester, polyethylene, or other plastic), then treating the softened substrate with short fibers or texture particles. Alternatively, the short fibers or texture particles can be applied during the formation of the substrate (e.g., in an extrusion, melt-blowing, die casting, weaving, or drawing process).

Method of manufacturing a textured toothbrush bristle

The art knows of methods of manufacturing disposable protective covers ( ) that are seatable onto an infrared radiation thermometer suitable for introduction into a body cavity, in particular upon an ear canal temperature probe. To manufacture such a disposable protective cover ( ) economically, a tubular body portion ( ) is produced by extruding molten plastic following which the one end of the body portion ( ) is closed with the window film ( ).

Method of producing a disposable protective cap for an infrared radiation thermometer

The invention is directed to a bristle (,) suitable for use in a brush (,) or the like, and in particular in a toothbrush. The bristle (,) is made of a plastic material and includes preferably a circular area of cross-section. When viewed in cross-section, the bristle (,) includes two sections (,) with different properties. These sections (,) are not in concentric relative arrangement. As a result, the bristle (,) curves along its longitudinal axis. The curvature produces an improved cleaning action of the brush (,).

The invention is directed to a bristle (12) for a toothbrush, in particular for an electric toothbrush, which is made of plastic and includes several filaments (13, 14, 15) joined together. The filaments (13, 14, 15) are wound or braided and joined together as a result of the action of chemical agents. This results in a firm bond between the filaments (13, 14, 15), and any cavities between the filaments (13, 14, 15) are reliably avoided. Overall, a toothbrush results which, in addition to having a high cleaning effect, offers bacteria or other germs no possibility of infiltration.

The invention is directed to a bristle (1) for a toothbrush, in particular for an electric toothbrush, which is comprised of a monofilament (2) made of plastic. The monofilament (2) is of a non-circular cross-section, is twisted about its longitudinal axis, and is fixed as a result of the action of chemical agents. In this manner, the bristle (1) is provided with a three-dimensionally structured surface which effects an improved cleaning action, in particular with regard to the removal of plaque.

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Wiesbaden, Germany

Ahmet Cem Firatli