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US 6,190,479 B1Granted
Cured tread processing for tire retreading
OwnerDavid Bruce DuMars, Anita DuMarsinventors
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Abstract
A cured tread making apparatus and method including a tread extruder from which a hot rubber compound continuously exits, a continuous rotational curing device comprising a heated rotatable drum and a cooperating moving tension belt adapted to provide continuous curing pressure against the rotating drum, and cast segments, incorporating a particular tread design, attached to the exterior circumferential surface area of the heated drum.
Claims11
A cured tread making apparatus comprising:
- a tread extruder from which a hot rubber compound continuously exits;
- a continuous rotational curing device comprising a heated rotatable drum and a cooperating moving tension belt adapted to provide continuous curing pressure against the rotating drum;
- and
- segments, incorporating a particular tread design, attached to the exterior circumferential surface area of the heated drum.
1 more element
A method of making a cured tread, comprising the steps of:
- providing a tread extruder from which a hot rubber compound continuously exits;
- providing a continuous rotational curing device comprising a heated rotatable drum and a cooperating moving tension belt adapted to provide continuous curing pressure against the rotating drum;
- attaching segments incorporating a particular desired tread design to the exterior circumferential surface area of the drum;
- activating the tread extruder to extrude a hot rubber compound;
- continuously feeding the rubber compound to the segments located on the drum with the tread design incorporated into the extruded tread as it passes through the continuous rotational curing device.
2 more elements
Dependencies are inferred from the claim text.