Handle for a brush, in particular a toothbrush
AssigneeTrisa Holding AG
InventorsArmin Baertschi, Martin Zwimpfer, Christian Hilfiker
Life of this patent
Estimating the term…
Abstract
The inventive handle for a brush, in particular for a toothbrush or a domestic brush, has an integral handle body with a hollow space which is surrounded by a wall. Recesses which are offset in relation to one another and open into the hollow space are formed in the wall. The handle is produced from a plastic in an injection-molding process using an injection-molding die which has finger elements, with sections of these finger elements touching in a sealing manner when the injection-molding die is in the closed state and, as a result, these finger elements forming the recesses and the hollow space in the hardened handle.
Claims34
A handle adapted for a toothbrush comprising:
- an elongate handle body including a cavity at least partially enclosed by a wall, the wall having a plurality of recesses, wherein
- the elongate handle body is formed of one piece,
- the recesses pass through the wall, are offset in relation to each other, and open into the cavity,
- at least two circumferentially offset recesses are arranged on opposite sides of the elongate handle body so as to be offset by substantially 180° in a circumferential direction,
- at least two longitudinally offset recesses are offset from each other in the longitudinal direction of the elongate handle body and are spaced apart from one another by one or more webs of the wall, and
- the one or more webs have an essentially, identical material thickness and/or extent in the longitudinal direction of the elongate handle body.
A handle configured for use with brush products comprising:
- an elongate handle body including a cavity at least partially enclosed by a wall, the wall having a plurality of recesses, wherein
- the elongate handle body is formed of one piece,
- the recesses pass through the wall, are offset from each other in a longitudinal direction of the elongate handle body, and open into the cavity,
- at least two circumferentially offset recesses are arranged opposite sides of the elongate handle body so as to be offset by substantially 180° in a circumferential direction,
- at least two longitudinally offset recesses are offset from each other in the longitudinal direction of the elongate handle body and are spaced apart from one another by one or more webs of the wall, and
- the one or more webs have an essentially identical material thickness and/or extent in the longitudinal direction of the elongate handle body.
A method of producing a handle adapted for a brush product having an elongate handle body with a cavity at least partially enclosed by a wall, the wall having a plurality of recesses, wherein the elongate handle body is formed of one piece and the recesses pass through the wall, are offset in relation to each other, and open into the cavity, the method comprising:
- injecting plastic, in an injection-molding process, into a continuous cavity defined by an injection mold;
- and
- bounding at least a portion of the cavity with a plurality of finger elements which, in a closed state of the injection mold, are in at least partial sealing contact with each other to prevent throughflow of plastic and which define, in the finished handle, the recesses and the cavity in the handle body.
Dependencies are inferred from the claim text.