A mold insert has at least one filament cavity and a stack of at least a first and second insert plates, wherein the first plate has a front face that closely abuts a front face of the second insert plate. A portion of the a filament cavity is provided in at least one of the front faces of the first and second insert plates such that the filament cavity is open at a top surface of the mold insert but does not extend to a bottom surface of the mold insert. A venting cavity is provided in the same front face of the insert plate in which the portion of the at least one filament cavity is provided. The venting cavity, which is in air-conducting connection with the blind-hole end of the filament cavity, has a depth between 1 μm and 20 μm. A method of manufacturing the mold insert includes providing first and second insert plates, forming a portion of a filament cavity into at least one of the front faces of the insert plates, forming a venting cavity into the front face with the filament cavity, and bringing the front faces of the plates into close abutment to form a filament cavity.

A brush head for an electrically driven toothbrush is provided herein. The brush head includes a holding part connected to a carrier part, at least one bristle bundle formed by bristle filaments, and a resiliently soft cleaning element. The carrier part includes passage bores, through which the bristle bundle and resiliently soft cleaning element project, and each is fixed to the carrier part by way of a thickened portion formed by a filament material or a resiliently elastic material, respectively. A method of producing a brush head is also provided, including preparing the carrier part as a separate component with passage bores, fixing the bristle bundle and the resiliently clastic cleaning element to the carrier part with a thickened portion provided on the bristle bundle and the resiliently elastic cleaning element, respectively, and connecting the carrier part to the holding part.

A head for a toothbrush, a toothbrush incorporating the toothbrush head and a method of fabricating the same is disclosed. The toothbrush head includes a bulbous body that is located at one end of a handle. The body includes first and second ends and a longitudinal axis extending therebetween. The body comprises a first disc and at least a second disc located generally vertically below the first disc. Each disc has a peripheral surface with a plurality of facetted regions formed therein. The facets may include detents and indentations. The peripheral surface may also include a plurality of cylindrical rod-like projections that extend radially outwardly therefrom and are oriented at right angles to the longitudinal axis. The toothbrush is fabricated by injection molding an inner core from a rigid material and then injection molding a resilient layer around that core.

A method for producing a toothbrush comprises providing a head, a neck portion, and a handle; providing a coupling element; and combining the neck portion to the handle by the coupling element so that an irreversible connection is formed. The individual parts of the toothbrush to be formed can be produced in parallel or successively, wherein some of the parts can be produced by injection molding. A toothbrush formed by the method comprises a head, a neck portion, and a handle; these elements can be produced as building blocks separately and may be connected to one another via a coupling element to form an inseparable connection.

Provided is a method for manufacturing an interdental cleaning device (1) including a base portion (10) having a handle portion (11) and a core portion (12); and a soft portion (20) having a cleaning soft portion (21), a non-slip portion (22), and connecting portions (23) extending from two sites of the non-slip portion (22) and being connected to the cleaning soft portion (21). The method includes causing a second gate (49) of second molds (40) and (41) for molding the soft portion (20) to open at a position substantially equally distant from positions of two communicating openings (48a) of a non-slip molding space (47) for molding the non-slip portion (22), the two communicating openings (48a) communicating with connecting portion molding spaces (48) for molding the connecting portions (23); and charging the elastomeric material from the second gate (49) into a second molding space (42) for molding the soft portion (20) to fill the molding space (42).

A toothbrush having a brush head with bristles extending therefrom, a handle having a toothpaste chamber therein, a valve configured to open and close an opening in the brush head, a passageway extending from the toothpaste chamber to the opening, and wherein at least a portion of the handle is fabricated of a pliable material such that toothpaste contained within the toothpaste chamber can be dispensed on to the brush head via the opening by application of pressure to the pliable portion of the handle.

A toothbrush apparatus and system and associated method. The apparatus includes a sensing module that performs at least one of the following: detect at least one time period associated with use of the toothbrush apparatus, detect one or more movements of the toothbrush apparatus, and any combination thereof. The apparatus's one or more processors communicatively coupled to the sensing module determine one or more measurements based on at least one of: the detected time periods, the detected movements, and any combination thereof, and store the determined measurements in one or more memory locations communicatively coupled to the processors. The apparatus also includes one or more feedback modules that receive the stored measurements and encode the measurements into corresponding feedback signals. One or more data transfer modules transmit the feedback signals.

Methods for producing toothbrush handles having an inner cavity are provided.

A method of making a brush includes providing a plurality of first filaments, each having a first end and a second end; bringing the plurality of first filaments into a first predetermined shape such that the first ends are arranged side by side on a common contour; fixedly connecting the first ends so that a first pre-tuft having the first predetermined shape and a connected first end is formed; bringing a second tuft element having a first end and a second end together with the first pre-tuft into a second predetermined shape such that the first end of the second tuft element and the connected first end of the first pre-tuft are arranged side by side on a common contour; fixedly connecting the connected first end of the first pre-tuft and the first end of the at least second tuft element so that a final tuft having the second predetermined shape and a connected end is formed; and attaching the final tuft to a brush body by overmolding the final tuft's connected end with a plastic material.

To provide method for manufacturing interdental cleaner configured to suppress leakage of elastomer from space for forming slip resistance portion in mold to outside of space in step of filling elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion and slip resistance portion by filling elastomer into second mold (200) with the base portion situated in second mold (200). In first step, what is molded has handle portion including base (24), recessed portion (26), and bulge portion (28) bulging from surface of the recessed portion (26). In second step, cleaning portion and slip resistance portion are formed by filling elastomer into second space from portion of base portion distant from bulge portion (28) toward shaft portion (40).