Plastic object for use in personal hygiene
AssigneeTrisa Holding AG
InventorsBeat Huber, Peter Waldispuhl
Life of this patent
Estimating the term…
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.
Claims33
An article for use in personal hygiene having a brush head, a handle and a neck part connecting the brush head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the proximal end of the article, the first molded part being formed of a first plastic material;
- and
- a second molded part forming the neck part and bearing the brush head at the distal end of the article, the second molded part being formed of a second plastic material and being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second plastic materials forming a chemical bond with one another, and
- wherein one or both of the first and second molded parts receive at least one further part, of a different material than the first and second molded parts, formed of a thermoplastic elastomer.
An article for use in personal hygiene having a brush head, a handle and a neck part connecting the brush head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the a proximal end of the article, the first molded part consisting of a first plastic material;
- and
- a second molded part forming the neck part and bearing the brush head at the distal end of the article, the second molded part consisting of a second plastic material which is more resistant to peppermint oil contained in a tooth-cleaning agent than the first plastic material and being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second plastic materials forming a chemical bond with one another, and
- wherein one or both of the first and second molded parts receives at least one further part, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
An article for use in personal hygiene having a brush head, a handle and a neck part connecting the brush head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the a proximal end of the article, the first molded part consisting of a first transparent plastic material;
- and
- a second molded part forming the neck part and bearing the brush head at the distal end of the article, the second molded part consisting of polypropylene and being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second plastic materials forming a chemical bond with one another, and
- wherein one or both of the first and second molded parts receives at least one further part, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
An article for use in personal hygiene having a brush head, a handle and a neck part connecting the brush head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part of a first material defining at least a portion of an exterior of the handle and, at least a portion of the first molded part extending between the midpoint and the proximal end of the article;
- and
- a second molded part of a second, different material forming the neck part and bearing the brush head at the distal end of the article, the second molded part being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion, and
- wherein one or both of the first and second molded parts are provided with further parts, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
An article for use in personal hygiene having a treatment head, a handle and a neck part connecting the treatment head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part defining at least a portion of an exterior of the handle and, at least a portion of the first molded part extending between the midpoint and the proximal end of the article, the first molded part consisting of a first plastic material;
- and
- a second molded part forming the neck part and bearing the treatment head at the distal end of the article, the second molded part consisting of a second plastic material and being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second plastic materials forming a chemical bond with one another, and
- wherein one or both of the first and second molded parts is provided with further parts, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
An article for use in personal hygiene having a treatment head, a handle and a neck part connecting the treatment head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part of a first material defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the proximal end of the article;
- and
- a second molded part of a second, different material forming the neck part and bearing the treatment head at the distal end of the article, the second molded part being injection-molded around or into the first molded part,
- one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion, and
- wherein one or both of the first and second molded parts are provided with further parts, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
A toothbrush having a brush head, a handle and a neck part connecting the brush head and the handle, the toothbrush defining proximal and distal ends and a midpoint between the proximal and distal ends, the toothbrush comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending proximal end of the toothbrush, the first molded part consisting of polyester;
- a second molded part forming the neck part and bearing the brush head at the distal end of the toothrush, the second molded part consisting of polypropylene;
- and
- further molded parts on the first or second molded part consisting of thermoplastic elastomer,
- wherein one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second molded parts forming a chemical bond with one another.
A toothbrush having a brush head, a handle and a neck part connecting the brush head and the handle, the toothbrush defining proximal and distal ends and a midpoint between the proximal and distal ends, the toothbrush comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the proximal end of the toothbrush, the first molded part consisting of styrene acrylonitrile;
- a second molded part forming the neck part and bearing the brush head at the distal end of the toothbrush, the second molded part consisting of polypropylene;
- and
- further molded parts on the first or second molded part consisting of thermoplastic elastomer,
- wherein one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second molded parts forming a chemical bond with one another.
A toothbrush having a brush head, a handle and neck part connecting the brush head and the handle, the toothbrush defining proximal and distal ends and a midpoint between the proximal and distal ends, the toothbrush comprising:
- a first molded part defining at least a portion of an exterior of the handle and at least a portion of the first molded part extending between the midpoint and the proximal end of the toothbrush, the first molded part consisting of acrylonitrile-butadiene styrene;
- a second molded part forming the neck part and bearing the brush head at the distal end of the toothbrush, the second molded part consisting of polypropylene;
- and
- further molded parts on the first or second molded part consisting of thermoplastic elastomer,
- wherein one of the first and second molded parts is at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releaseable interlocking fashion without the first and second molded parts forming a chemical bond with one another.
An article for use in personal hygiene having a brush head, a handle and a neck part connecting the brush head and the handle, the article defining proximal and distal ends and a midpoint between the proximal and distal ends, the article comprising:
- a first molded part of a first material defining at least a portion of an exterior of the handle at least a portion of the first molded part and extending between the midpoint and the proximal end of the article;
- a second molded part of a second, different material forming the neck part and bearing the brush head at the distal end of the article,
- one of the first and second molded parts being at least partially enclosed by the other one of the first and second molded parts during injection molding so that the first and second molded parts are mechanically joined to one another in a non-releasable interlocking fashion, and
- wherein one or both of the first and second molded parts are provided with further parts, of a different material than the first and second molded parts, consisting of a thermoplastic elastomer.
Dependencies are inferred from the claim text.