Method for producing a hollow handle for a teeth cleaning device
AssigneeTrisa Holding AG
InventorsPhilipp Pfenniger, Beat Huber
Life of this patent
Estimating the term…
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).
Claims23
A method for producing a hollow handle for a personal hygiene device, comprising:
- forming at least two handle parts, at least one of the handle parts being formed in a shell-shaped manner;
- forming on one of the handle parts protruding pin-like lugs and on the other handle part corresponding openings, the lugs and the openings forming inter-engaging holding means;
- joining the at least two handle parts together so that mutually opposed end faces of the at least two handle parts define a common parting joint therebetween;
- mechanically holding the joined-together handle parts in a predetermined relative position by the inter-engaging holding means formed on the handle parts;
- introducing the joined-together handle parts into an injection mold;
- and
- filling the common parting joint between the joined-together handle parts in an injection molding operation with a thermoplastic elastomer to secure the at least two handle parts together and form a connection seam, wherein the inter-engaging holding means are provided in a region remote from the connection seam at the parting joint.
A method for producing a hollow handle for a personal hygiene device, comprising:
- forming at least two handle parts from plastic in separate steps, at least one of the handle parts being formed in a shell-shaped manner and at least one of the handle parts being made of a transparent material;
- forming on one of the handle parts protruding pin-like lugs and on the other handle part corresponding openings, the lugs and the openings forming inter-engaging holding means;
- joining the at least two handle parts together so that mutually opposed end faces of the at least two handle parts define a common parting joint therebetween;
- mechanically holding the joined-together handle parts in a predetermined position by the inter-engaging holding means;
- introducing the joined-together handle parts into an injection mold;
- and
- forming a connection seam by filling the common parting joint between the joined-together handle parts in an injection molding operation with a thermoplastic elastomer to secure the at least two handle parts together, at least one of the handle parts being formed of a plastic material that enters into a material bond with the thermoplastic elastomer forming the connection seam and at least one of the handle parts being formed of a plastic material that does not enter into a material bond with the thermoplastic elastomer.
Dependencies are inferred from the claim text.