Abstract: The invention relates to a method and a device for producing a toothbrush (50) or part thereof by the two-component or multi-component injection-molding process. To produce in the brush body segments (20) that are isolated from the rest of the brush body, a mold (10) which comprises three hollow regions (12, 14, 16) is used. Two of these hollow regions (12, 14) that are separate from one another serve for producing the segments (12) and the other regions (18) of the toothbrush (50) from a first component (38). A third hollow region (16) serves for distributing material to the segments (20) that are isolated from one another and from the other regions (18), or the corresponding hollow region (14). The material (22) remaining behind there is removed and sent for disposal. In a further step, connecting elements (42) between the segments (20) and/or the other regions (18) are injection-molded from a second component (39).

Abstract: The invention relates to a toothbrush with a neck piece and a brush body, comprising a head piece connected thereto, conventional bristles and at least one soft elastic cleaning element. According to the invention, the conventional bristles are mounted on a support element made from hard plastic. The above is connected to the brush body by means of a recess on the head piece which matches the support element. The at least one cleaning element is arranged on the head piece and directly connected to the brush body. The invention further relates to a method for production of such a toothbrush.

Abstract: The invention relates to a toothbrush with a neck piece and a brush body, comprising a head piece connected thereto, conventional bristles and at least one soft elastic cleaning element. According to the invention, the conventional bristles are mounted on a support element made from hard plastic. The above is connected to the brush body by means of a recess on the head piece which matches the support element. The at least one cleaning element is arranged on the head piece and directly connected to the brush body. The invention further relates to a method for production of such a toothbrush.

Abstract: The invention relates to a toothbrush with a neck piece and a brush body, comprising a head piece connected thereto, conventional bristles and at least one soft elastic cleaning element. According to the invention, the conventional bristles are mounted on a support element made from hard plastic. The above is connected to the brush body by means of a recess on the head piece which matches the support element. The at least one cleaning element is arranged on the head piece and directly connected to the brush body. The invention further relates to a method for production of such a toothbrush.

Abstract: The invention relates to a process for producing an oral care device, such as a toothbrush, having a body, which comprises a handle region, a head region and a neck region located between the handle region and the head region, and having functional elements which are arranged, at least in part, within the body and comprise an electrically operated functional unit and an electric supply device which has an energy store and is intended for the functional unit, in the case of which the body is produced, by injection molding, from at least one hard component, which serves as a reinforcement, and at least one soft component, and at least some of the functional elements, during the production of the body, are encapsulated, at least in part, directly by the plastic which forms the soft component.

Abstract: The invention relates to a process for producing a toothbrush having a body, which comprises a handle region, a head region and a neck region located between the handle region and the head region, and having functional elements which are arranged, at least in part, within the body and comprise an electrically operated functional unit and an electric supply device which has an energy store and is intended for the functional unit, in the case of which the body is produced, by injection molding, from at least one hard component, which serves as a reinforcement, and at least one soft component, and at least some of the functional elements, during the production of the body, are encapsulated, at least in part, directly by the plastic which forms the soft component.

Abstract: The invention relates to saucer-type handle components (5, 6) that pertain to a hollow handle and are produced in several steps. Said handle is used for a toothbrush. Said components are joined together and are inserted into an injection mould (25). A synthetic material, preferably a thermoplastic elastomer, is injection-moulded around the mould-parting line between the handle components (5, 6) in said injection mould (25). The connection seam (22) thus produced holds the two handle components (5, 6) together in a nondetachable manner and seals the hollow space (13) which is formed by the handle components (5, 6).

Abstract: A unitary two component article for personal hygiene, such as a toothbrush, wherein the same is formed by injection molding of two differing plastic materials. The plastics do not adhesively or chemically bond to each other. The two differing plastic parts of the toothbrush are mechanically connected, such as by interfitting portions of the two plastic components or by shrinking one plastic component about the other.

Abstract: A unitary two component article for personal hygiene, as a toothbrush, wherein the same is formed by injection molding of two differing plastic materials, which plastics do not adhesively or chemically bond to each other, thereby facilitating the manufacturing process. The two differing plastic parts of the toothbrush are mechanically connected, as by interfitting portions of the two plastic components and as by shrinking one plastic component about the other.

Abstract: The invention relates to a toothbrush with a neck piece and a brush body, comprising a head piece connected thereto, conventional bristles and at least one soft elastic cleaning element. According to the invention, the conventional bristles are mounted on a support element made from hard plastic. The above is connected to the brush body by means of a recess on the head piece which matches the support element. The at least one cleaning element is arranged on the head piece and directly connected to the brush body. The invention further relates to a method for production of such a toothbrush.

Abstract: A unitary two component article for personal hygiene, as a toothbrush, wherein the same is formed by injection molding of two differing plastic materials, which plastics do not adhesively or chemically bond to each other, thereby facilitating the manufacturing process. The two differing plastic parts of the toothbrush are mechanically connected, as by interfitting portions of the two plastic components and as by shrinking one plastic component about the other.

Abstract: The invention relates to a process for producing a toothbrush having a body, which comprises a handle region, a head region and a neck region located between the handle region and the head region, and having functional elements which are arranged, at least in part, within the body and comprise an electrically operated functional unit and an electric supply device which has an energy store and is intended for the functional unit, in the case of which the body is produced, by injection molding, from at least one hard component, which serves as a reinforcement, and at least one soft component, and at least some of the functional elements, during the production of the body, are encapsulated, at least in part, directly by the plastic which forms the soft component.

Abstract: Flexible brush head (14) for a toothbrush (10), having a bristle carrier (16) which consists of a first, hard, elastic plastic and is subdivided by segments (17), which are arranged one behind the other in the longitudinal direction of the brush head (14), by tunnels (20) running transversely with respect to the longitudinal axis of the brush head (14). The segments (17) of the bristle carrier (16) and the tunnels (20) extend preferably over the entire width of the brush head (14). The tunnels (20) are filled with a second, soft, elastic plastic and connected to one another via a groove (30) provided laterally on the bristle carrier (16). The regions (22, 22′) of the bristle carrier (16), which bound the tunnels (20) on the bristle-carrying side of the brush head (14) and on the side located opposite the bristle-carrying side, are elastically deformable and, in the event of the bristle-carrier segments (17) being deflected during use, act as a bending-limiting structure.

Abstract: The invention relates to saucer-type handle components (5, 6) that pertain to a hollow handle and are produced in several steps. Said handle is used for a toothbrush. Said components are joined together and are inserted into an injection mould (25). A synthetic material, preferably a thermoplastic elastomer, is injection-moulded around the mould-parting line between the handle components (5, 6) in said injection mould (25). The connection seam (22) thus produced holds the two handle components (5, 6) together in a nondetachable manner and seals the hollow space (13) which is formed by the handle components (5, 6).

Abstract: An adhering element (10) has a sucker (12) made of an elastomeric plastic and a connecting element (14) made of a more rigid plastic. The connecting element (14), which has a flange border (24), is connected non-releasably to the sucker (12) by virtue of the two parts (12), (14) being produced preferably by two-component injection moulding. This increases the stability of the adhering element (10), in particular when the latter is connected to an elongate object, for example a self-supporting toothbrush.

Abstract: Method of manufacturing the quality of contacts e.g. in an LCD module in which an IC is so placed on the surface of a substrate that the external connections of the IC electrically contact the desired interconnections on the substrate. The quality of the electrical contacts is tested by powering up the IC and running a selftest program. This selftest checks all contacts between the external connections of the device and the interconnections on the substrate, e.g. the row-column conductors on the LCD-glass. Due to a possibly poor ohmic contact the signals from the driver-IC may be delayed, the delay measured being representative for the quality of the contact.

Abstract: The apparatus which includes a cell culture chamber enables cell biological experiments with botanical, zoological or homological cells to be carried out. The apparatus comprises a pump housing and a cell culture block with a cell culture chamber therein in which the cell culture medium or nutrient can be automatically and continually exchanged by the action of an osmotic fluid pump connected to the chamber. The osmotic fluid pump is activated by a fluid filled into a cavity in the pump housing. The osmotic fluid pump forces its pre-charged contents, i.e. the cell culture medium or nutrient, through an inlet passage into the cell culture chamber. The exhausted or expanded cell culture medium or nutrient can drain or exhaust through an outlet passage into the cavity of the pump housing. This ensures that no excess pressures arise in the system. The apparatus is especially well-suited for carrying out or implementing biological experiments under zero gravity conditions such as prevail in spaceships.