An ear plug (100) comprises an outer ear part comprising a stem (110). The ear plug (100) comprises an ear tip (200) coupled to the stem (110) of the outer ear part an ear tip (200) coupled to the stem (110). The outer ear part comprises: - a substrate (102) defining the shape and providing the stem (110) of the ear plug (100), the substrate (102) comprising a first and a second portion (111, 112); and - a covering layer (120) covering said first portion (111) of the substrate (102) and providing the outer surface of said first portion (111), the outer end (113) of the stem (110) being provided by the second portion (112) of the substrate (102) and being adapted to be inserted in the ear tip (200), said second portion (112) being free of said covering layer (120). The substrate (102) is provided from a first polymer, the covering layer (120) being provided from a second polymer being a silicone polymer, the hardness of the first polymer being larger than the hardness of the second polymer.
An eartip (1) comprising: − a stem (300) extending along an axial direction (2); − a second flange (201) extending radially and longitudinally from the stem (300), the second flange (201) comprising a second end (21) extending around and coupled to the stem (300) at a second axial coupling position (212) along the axial direction (2); and − a first flange (101) extending radially and longitudinally from the stem (300), the first flange (101) comprising a first end (11) extending around and coupled to the stem (300) at a first axial coupling position (111) along the axial direction (2); wherein the first flange (101) encompasses the second flange (201); wherein the first flange (101) and the second flange (201) contact each other along at least one contact line (40) encircling the stem (300) at a contact position (401) along the axial direction (2).
An ear insert retainer comprises a flexible elongate object for linking two ear inserts, said flexible elongate object having a first and a second outer end, one or both of said outer ends being adapted to be connected to a rearward part of an ear insert, said ear insert retainer comprises at least a first interrupting means along said flexible elongate object. The first interrupting means is adapted to interrupt the link of the ear insert with the flexible elongate object when a force applies to the flexible elongate object in the longitudinal direction. The first interrupting means is provided to the first outer end of the flexible elongate object, this first interrupting means comprises a first member, said first member being adapted to detachably and loosely connecting to a rearward part of an ear insert.
A61F 11/08 - Protective devices for the ears internal, e.g. earplugs
B24B 31/02 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is looseAccessories therefor involving rotary barrels
B24B 31/06 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is looseAccessories therefor involving oscillating or vibrating containers
B29C 43/02 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles
B29C 43/32 - Component parts, details or accessoriesAuxiliary operations
B29C 59/02 - Surface shaping, e.g. embossingApparatus therefor by mechanical means, e.g. pressing
A method is provided for manufacturing polymer products. The method comprises the steps • forming one or more intermediate polymer products from elastomeric polymer; • tumbling one or more intermediate polymer products with abrasive objects in the presence of a liquid.
B24B 31/02 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is looseAccessories therefor involving rotary barrels
B24B 31/06 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is looseAccessories therefor involving oscillating or vibrating containers
B29C 45/00 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor
B29C 43/32 - Component parts, details or accessoriesAuxiliary operations
B29C 43/02 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles
B29C 71/00 - After-treatment of articles without altering their shapeApparatus therefor
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