Abstract A fully automatic machine for producing ''''green tires'''' or unvulcanized tire carcasses, especially suitable for making tubeless tires. The machine comprises a plurality of interconnected and dependent assemblies or stations where specialized operations, normally done semi-automatically or by hand, are carried out by mechanical devices acting in sequence. The machine includes a plurality of conventional tire building drums continuously moving between horizontally disposed, stationary table assemblies where innerliner and chafer strips, and first and second ply material are successively wrapped on the drums as they move across the table on which the material is positioned. The wrapped drums from these assemblies, are sent to turret units where they are arcuately positioned for receiving beads, tread cushion, stitching, strips of whitewall, if required, and are discharged from the collapsed drums for removal and storage. The stripped drums, or drums from which tires are removed, are automatically expanded and recycled through the assemblies for building more tire carcasses.
A mechanism for cutting cord-reinforced rubber tire ply material, comprising: a. a clamp with paired spaced fingers for compressively engaging an adjacent edge of the material at spaced points; b. a blade comprising 1. an arcuate knife edge for cutting the material edge between the points; and 2. a blunt edge adjoining the knife edge movable into the cut for tearing the material between adjoining cords; c. means for rotating the said blade from a cutting to a tearing position; d. means for lifting the material as the tearing proceeds; and e. means for heating the blade.
Claim 2
Dependent Claim
97 words
A mechanism for cutting cord-reinforced rubber tire ply material, comprising: a. a clamp with paired spaced fingers for compressively engaging an adjacent edge of the material at spaced points; b. a blade comprising 1. an arcuate knife edge for cutting the material edge between the points; and 2. a blunt edge adjoining the knife edge movable into the cut for tearing the material between adjoining cords; c. means for rotating the said blade from a cutting to a tearing position; d. means for lifting the material as the tearing proceeds; and e. means for heating the blade.
Claim 3
Dependent Claim
49 words
a blunt edge adjoining the knife edge movable into the cut for tearing the material between adjoining cords; c. means for rotating the said blade from a cutting to a tearing position; d. means for lifting the material as the tearing proceeds; and e. means for heating the blade.
Claim 4
Dependent Claim
49 words
a blunt edge adjoining the knife edge movable into the cut for tearing the material between adjoining cords; c. means for rotating the said blade from a cutting to a tearing position; d. means for lifting the material as the tearing proceeds; and e. means for heating the blade.
Claim 5
Independent Claim
94 words
A method of cutting cord-reinforced rubber tire ply material, comprising the steps of: a. moving the material onto a bed; b. clamping an edge of the material to the bed at two spaced points; c. placing a cut in the edge of the material between the two points; d. moving a blunt edge into the cut and tearing the material between adjoining cords; e. lilting the material from the bed to facilitate tearing it; and f. heating the rubber along the cut and torn edges to cause it to flow and seal the edges.
Claim 6
Independent Claim
94 words
A method of cutting cord-reinforced rubber tire ply material, comprising the steps of: a. moving the material onto a bed; b. clamping an edge of the material to the bed at two spaced points; c. placing a cut in the edge of the material between the two points; d. moving a blunt edge into the cut and tearing the material between adjoining cords; e. lilting the material from the bed to facilitate tearing it; and f. heating the rubber along the cut and torn edges to cause it to flow and seal the edges.