# US 2014/0196834 A1 · Apparatus and method for manufacturing a green tyre > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196834 A1 - Document ID: US20140196834A1 - Status: Published application - Kind: A1 - Application number: 14/127,471 - Filed: 2012-06-28 - Published: 2014-07-17 - Earliest claimed: 2011-07-06 - Inventors: Jan Kornelis Grashuis; Antonie Slots - Web page: https://patentgrep.com/patent/US20140196834A1 ## CPC - B29D 30/30: Applying the layers; Guiding or stretching the layers during application {(applying tread bands to carcasses B29D30/58; retreading B29D30/54)} - B29D 30/20: by the flat-tyre method, i.e. building on cylindrical drums - B29D 30/42: Endless textile bands without bead-rings - B29D 30/46: Cutting textile inserts to required shape - B29D 30/70: Annular breakers - B29D 2030/241: {Auxiliary drums used for temporary storage of the layers before application to the building drums} - B29D 2030/3092: {Changing the orientation of the layers, e.g. plies, to be applied} - B29D 2030/705: {the breakers being obtained by cutting a continuous reinforced strip into predefined lengths and placing the cut strips side by side on a suitable support, e.g. a toroidal core or a carcass} - B60C 9/185: {between adjacent or radially below the belt plies} - B60C 2009/1871: {with flat cushions or shear layers between belt layers} - Y10T 29/49538: Tyre making - Y10T 29/53448: Vehicle wheel - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention provides an assembly and a method for manufacturing a green tyre. The assembly comprises a building drum (52), an extrusion device (75) for extruding a strip (70) of an unvulcanized rubber, a transfer drum (72) for helically winding the strip (70) of the unvulcanized rubber thereon into a layer of rubber material, and a cutting device (76) for at least substantially in axial direction severing the layer of rubber material, wherein the transfer drum (72) is movable between a first position near the extrusion device (52) and a second position near the building drum (52) for transferring the layer of rubber material from the transfer drum (72) to the building drum (52). ## Claims ### Claim at position 1 1-25. (canceled) ### Claim 26 Method for manufacturing a green tyre, comprising the steps of: from an extrusion device extruding a strip of an unvulcanized rubber material; during extruding helically winding the strip on a transfer drum for forming a layer of rubber material; at least substantially in axial direction severing the layer of rubber material; and transferring the cut layer of rubber material from the transfer drum onto a building drum by means of substantially simultaneously unwinding the layer from the transfer drum and winding up the layer onto the building drum. ### Claim 27 (depends on 26) Method according to claim 26, wherein the strip is wound into the layer of rubber material over several revolutions of the transfer drum. ### Claim 28 (depends on 26) Method according to claim 26, wherein the extrusion device and the transfer drum are moved with respect to each other in axial direction of the transfer drum during extruding. ### Claim 29 (depends on 26) Method according to claim 26, wherein the layer of rubber material is arranged on the building drum substantially in one revolution thereof. ### Claim 30 (depends on 29) Method according to claim 29, wherein the layer of rubber material is arranged on the building drum by means of a substantially continuous rotation of the building drum. ### Claim 31 (depends on 26) Method according to claim 26, wherein the layer of rubber material is formed using two, three or more extrusion devices, wherein the various extrusion devices extrude rubber components of different compositions. ### Claim 32 (depends on 26) Method according to claim 26, wherein the transfer drum is movable between a first position near the extrusion device and a second position near the building drum for transferring the layer of rubber material from the transfer drum to the building drum. ### Claim 33 (depends on 26) Method according to claim 26, wherein the transfer drum is rotatable about a first axis of rotation and the building drum is rotatable about a second axis of rotation, wherein the first and the second axis of rotation are placed substantially parallel, at least during transferring the cut layer. ### Claim 34 (depends on 26) Method according to claim 26, wherein the rubber material on the transfer drum is forcedly cooled by means of a cooling device in the transfer drum. ### Claim 35 (depends on 26) Method according to claim 26, wherein the rubber material, at least near a cutting zone thereof where the cutting device is able to sever the layer, is retained on the transfer drum by means of a retaining device, wherein the retaining device is a part of the transfer drum. ### Claim 36 (depends on 26) Method according to claim 26, wherein after cutting the layer of rubber material and during transferring the layer of rubber material from the transfer drum to the building drum the outer ends of the layer formed by cutting are kept spaced apart from one another by means of a separation member, wherein during transferring the layer of rubber material from the transfer drum to the building drum, the separation member keeps the outer ends spaced apart substantially in radial direction of the transfer drum. ### Claim 37 Assembly for manufacturing a green tyre, comprising a building drum, an extrusion device for extruding a strip of an unvulcanized rubber, a transfer drum which is arranged for helically winding the strip of the unvulcanized rubber thereon into a layer of rubber material, and a cutting device for at least substantially in axial direction severing the layer of rubber material, wherein the transfer drum is movable between a first position near the extrusion device and a second position near the building drum for transferring the layer of rubber material from the transfer drum to the building drum. ### Claim 38 (depends on 37) Assembly according to claim 37, wherein the layer of rubber material is formed of several revolutions of the strip around the transfer drum. ### Claim 39 (depends on 37) Assembly according to claim 37, wherein the diameter of the transfer drum is at least substantially larger or equal to the diameter of the building drum. ### Claim 40 (depends on 37) Assembly according to claim 37, wherein the diameter of the transfer drum is variable. ### Claim 41 (depends on 37) Assembly according to claim 37, provided with two, three or more extrusion devices adapted for extruding rubber components of different compositions. ### Claim 42 (depends on 37) Assembly according to claim 37, wherein the transfer drum is provided with a cooling device for cooling down the rubber material on the transfer drum. ### Claim 43 (depends on 37) Assembly according to claim 37, wherein the transfer drum, at least near a cutting zone thereof where the cutting device is able to sever the layer, comprises a retaining device for retaining the layer of rubber material. ### Claim 44 (depends on 37) Assembly according to claim 37, wherein the transfer drum, at least near a cutting zone thereof where the cutting device is able to sever the layer, comprises a separation member for keeping the outer ends of the layer, formed by severing the layer of rubber material, spaced apart from one another during transferring the layer of rubber material from the transfer drum to the building drum. ### Claim 45 (depends on 44) Assembly according to claim 44, wherein the separation member is adapted for keeping the outer ends spaced apart substantially in radial direction of the transfer drum, during transferring the layer of rubber material from the transfer drum to the building drum, wherein the separation member comprises a surface part of the transfer drum wherein the surface part is rotatably connected to a circumferential surface of the transfer drum, wherein the axis of rotation is situated near or in the circumferential surface of the transfer drum.