CA2152897A1 - Method of applying a symbol onto a visible surface of a tire - Google Patents
Method of applying a symbol onto a visible surface of a tireInfo
- Publication number
- CA2152897A1 CA2152897A1 CA 2152897 CA2152897A CA2152897A1 CA 2152897 A1 CA2152897 A1 CA 2152897A1 CA 2152897 CA2152897 CA 2152897 CA 2152897 A CA2152897 A CA 2152897A CA 2152897 A1 CA2152897 A1 CA 2152897A1
- Authority
- CA
- Canada
- Prior art keywords
- tire
- engraving
- symbol
- rubber
- visible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/04—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof having annular inlays or covers, e.g. white sidewalls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/001—Decorating, marking or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/009—Using laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/72—Side-walls
- B29D2030/726—Decorating or marking the sidewalls before tyre vulcanization
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
A method of applying at least one symbol onto a visible rubber surface of a tire includes the step of vulcanizing at least the visible rubber surface of the tire and engraving at least one symbol into the visible rubber surface after vulcanization. Preferably, the symbol is engraved into the sidewall of the tire. A colored rubber strip may be applied to a recess in the sidewall which is then covered with a rubber cover strip.
In the step of engraving the cover strip is removed so that the underlying colored rubber layer becomes visible for displaying the desired symbols. The engraving step can be performed with a laser.
In the step of engraving the cover strip is removed so that the underlying colored rubber layer becomes visible for displaying the desired symbols. The engraving step can be performed with a laser.
Description
2~a2~97 Background of the Invention The present invention relate~ to a method for applying a E~ymbol onto a viRible surface of a tire as well as a device for preforming the method, a tire, and a method for manufacturing the tire.
Tires are known on which the ~idewalls are provided with symbols, for example, in the form of letters or numbers representing, for example, the name of the manufacturer, the tire type, size or other tire identification~ symbols. With known tires it is conventional to imprint the respective ~ymbols already before beginning the vulcanization process into the sidewalls while the tire is positioned in the vulcanization mold. Thus, the markings or symbols are already present at the tire before the vulcanization process.
Furthermore it is known to provide tires with symbol~ having a color that differs from the color of the ~idewall of the tire. For manufacturing such tires, a colored rubber strip is inserted into a rece~;s of the outermost rubber layer in the area of the ~idewall and is covered with a rubber ~trip corresponding to the color of the sidewall.
In the vulcanization mold the symbol is then imprinted, before vulcanization takes place, into 21~289~
the rubber layer ~o that projectionl are formed within the sidewall area of the tire which corre~pond to the de~ired ~ymbol~. After completed vulcanization the uppermost imprinted rubber layer is then carefully removed by cutting.
Such method i8, for example, known from United State~ Patent 1 448 286. From German Patent 30 46 664 it i8 kr~own to apply rubber Rtrip~ having cutout portions correRponding to the de~ired cymbol~ which are filled with a colored rubber material. Thece ~trip~ are presced onto the ~idewall of the tire. During the ~ub~equent vulcanization process the applied rubber ctrip i~3 fu~ed to the sidewall. For protecting the symbol~
on the tire again~t damage during the vulcanization proceE~R, German Patent 30 46 664 suggest the u~e Df a protective layer which i~
removed after completed vulcanization. A tire according to US Patent 1 448 286 aR well as a tire according to German Patent 30 46 664 requires a complete determination of the desired cymbol before vulcanization of the tire. According to the individual requirementEi with re~pect to the ~ymbol~ to be provided at each tire, re~pective mold~ and forms for the imprinting proceR~ or molding process must ~e provided. Additional symbols after completion of manufacture o the tire in re8ponse to suddenly required individual cpecifications can not be applied after vulcanization is complete. The high expenditure with respect to individual tools, the limited possibilities for individual manufacture, and the lack of a fle~ible supplemental application of symbols have resulted in high costs and a reluctant application of such 8ymbols on tires.
Furthermore, the determination of the symbols before vulcanization also results in the higher risk of a deviation of the prDduced symbol from the desired symbol and thus in quality 1088 due to the already preformed vulcanization process and the subsequently re~uired ~urther i~reatment which is only partly successful.
It i~ therefore an object of the present invention to provide a method with which with ~imple means after completion of Vul(~ni7~t;~
symbols can be applied to the visible surfaces of a tire accDrding to individual specification as well as to provide a method for producing such tires .
Summary of the Invention 21~2~97 The method of applying at lea~t one symbol onto a vi~ible rubber surface of a tire according to the present invention i8 primarily characterized by:
Vulcanizing at least the vi~ible rubber surf ace of the tire; and engraving at least one Elymbol into the vicible rubber Gurface after the ~tep of vulcanizing .
Preferably, in the ~tep of vulcanizing the complete tire i8 vulcanized.
Advantageously, in the step of engraving the at leaE3t one ~ymbol is etched into the sidewall of the tire_ Preferably, the ~tep of engraving ~ include~
the ctep of changing the color of the surface area where engraving i~ preformed.
Expediently, the ~tep of engraving include~
removing an outer rubber layer to make vi~ible at lea~t one underlying rubber layer of a different color .
Preferably, the method further compri8es, before the step of vulcanizing, the ~teps of building a green tire with a ~idewall 13trip having a re~e~, and bridgLn~ the rece~ w1th an o~ter 21~2897 rubber layer in the form of a rubber strlp that orm a ~nn~;n~ us, recess-free surface with the outer surface of the sidewall strip Preferably, the method further includes the step of arranging i-n the recess a plurality of rubber layers of different colors adjacent to one another in a ci~cumferential direction of the tire for producing in the step of engraving symbols of different colors. In the alternative, the ~Lethod further includes the step of arranging in the recess a plurality of rubber layers of different color ad~ acent to one another in the radial direction of the tire for producing`in the step of engraving symbols of different colors. In yet another embodiment of the present inv~ntion the method further ;n~ the step of arranging in the recess a plurality of rubber layers of different colors a top one another in an axial direction of the tire for producing in the step of en~raving symbols of different colors.
Pref erably, in the step of engraving the at least one symbol is engraved into the surface of the inner liner of t~e tire Advantageou31y, the step of engravi~g lncludes the step of laser-etching the at least ` ~152897 one symbol.
E~xpediently, the step of engraving includes the step~ of applying liquified gases for removing heat energy to the visible rubber 3urface in the area where the at least one sytlbol i~ to be engraved in order to make brittle the visible rubber surface-and cutting the at least one symbol with a mechanical engraving tool into the visible rubber surf ace .
The present invention furthermore relates to a device ior applying at least one symbol onto visible rubber surface of a tire after vulcanizing at least the visible rubber surface of the tire.
According to the pre~ent invention the device i~
primarily characterized by:
a means for receiving and holding a tire;
an engraving device for engraving at least one symbol into a rubber surface of the tire;
a means for driving in a three-dimensional relative m~,v~ t the means receiving and the engraving device relative to Dne ~nother; and means for controlling the means for driving in order to preform the three-dimensional relative r v~ ~nt according to a desired contour of the at least one symbol.
21~28~7 The present invention alæo relates to a tire compri~ing engraved contour~ forming recesses in a continuous surface area of the tire surface for supplying inormation. ~referably, the bottom Df the recesses i~ of a different color than the continuous surface area in the sidewalls of the rec~es. Advantageously, the tire urther comprises a rubber layer of a different color positioned between a reinforcement belt structure and an outer rubber layer forming the l~tF~r; nr tire: surface, wherein the rubber layer of a different color forms the bottom of the recess.
The pre~ent invention also relates to a method of producing a tire comprising engraved contDurs forming recesses in a nr~nt;nl~nus surface area of the tire surface for supplying information, wherein the bottom of the recesses is of a different color than the ~nnt;nllnu~ surface area and the sidewalls of the recesses The method according to the present invention is primarily characterized by.
Building a green tire, including arranging at least one colDred rubber layer on a reinforced tire-building layer and placing a cover layer on top of the colored rubber layer Vulcanizing the green tires; and engraving at least one symbol into the cover layer ~uch that the colored rubber layer is vi:3ible within the area of the at least one symbol .
Advantageously, the reinforced tire-building layer i~ a sidewall strip of the tire.
sy engraving a symbol into the rubber surf ace after completed vulcanization of the tire, arry desired symbol, also symbolE~ that have been decided on after completion of vulcanization, can be applied to the tire without being ~ubjected to any negative effects during the vulcanization proces~. Special measure~ for protecting the symbols during vulcanization are thus obsolete.
Furthf~ pecial individual tools su~h as mold~ or a- plurality of different cutting stamps for the individual tires are no- longer required.
The symbols, if necessary, can be applied to the tire a long time after the vulcanization process.
It is even possible to provide such symbols after production of a particular tire type has already been digcnnt i n~
Advantageously, since especially suitable for mass production and thus correspondingly sirnple 21~897 and inexpensive, the entire tire is fist vulcanized and only after cDmpletion of vulcanization the symbol is engraved into the rubber surf ace .
It i8 especially preferred to engrave the at least one symbol into the sidewall of the tire.
Especially in the area of the sidewall the application of individual symbols is very desirable. Depending on market requirements, on government regulations etc. or changing customer orders, it is thus po~sible to apply new, easily recognizable symbols onto the tire even though the tire production has already been completed.
Advantageous is a method for applying such symbolc when during applying the color of the rubber surface in the area of the symbol is changed. The manufacturer or symbols that differ in color form the surrounding surfaces can be performed ~imply and reliably. The expensive and unsatis:Eactory protective measure~ against spreading of the color or blurring of the co~tours during vulcanization can thus be avoided.
Especially preferred is the inventive method in which the step of engraving includes removing an outer rubber layer to make visible at least one g -` ~ 2152~97 underlying rubber layer of a different color.
Pursuant to individual order~ colored symbols can be applied within a Yhort period of time with simple means. Especially advantageous is a method in which a green tire is build with a sidewall strip having a recess and the recess is bridged with an outer rubber layer in the form of a cover strip that forms a continuoue recess-free surface with the outer ~urface of the sidewall strip.
With these method steps symbols can be applied to the tire without having to content with visible deviations of the sidewall design of the tire.
Depending on the individual desire3 the tire can be offered for ~iale with an exterior sidewall provided without symbole of different color~, but with symbols matching the color of the ~idewall so as to have no apparent exterior deviations with respect to conventional tire3, or with an exterior sidewall having such colored (individual) Hymbols.
2 0 It i~ expedient to arrange in the recess a plurality of rubber layer~ of different ~olors adjacent to one another .in the Gircumferential, axial or radial direction of the tire or producing in the step of engraving symbols of d i f f erent co 1 ors .
21~2897 By providing the symbol at the inner liner of the tire, it is possible to provide the tire with barcodes in a simple manner according to individual specifications after vulcanization is complete .
Preferably, these symbols are applied with the aid of a laser because a laser requires only a small amount of electrical c~rrent and also provides for an especially exact engraving process.
According to another embodiment of the present invention, it is especially advantageous to apply to the rubber surface to be engraved a fluid which will remove heat energy from the surface 80 that the surface area becomes brittle.
Subsequently, the symbol is engraved with simple mechanical engraving tools.
The use of a laser allows, due to the contac~-free engraving process free of mechanical forces, a machining without having to take into consideration the elasticity and plasticity of the rubber. However, by making the surface brittle, a highly precise symbol quality can be achieved also with mechanical engraving tools. Undesirable side effects due to the elastic properties of 2~a289~
rubber are thus not encountered during m~rhln;nr,.
The pre~ent invention furthermore relates to a device for preforming the inventive method. The engraving device and the means for engraving and holding the tire are three-dimensionally moved relative to one another according to the desired contour of the symbol It is thus possible to engrave the tire while taking into account the contour of the tire surf ace and to provide a uniform symbol depth over the entire tire.
Advantageously, the engraving device is stationary and the means for receiving and holding the tire i~ moved three-dimensionally relative to the engraving device. This allows ~or a separation of the co~trol device for controlling the v~ t from tho~e control sLevices for controlling the engraving device and thus preventa problems resulting from such a combined u~e. Xowever, it i~ also possible to control the engraving device three-dimen~ir,nally and to provide a stationary means for receiving and holding the tire. It is furthermore possible to control the movement of the engraving device as well as the movement of the means f or receiving and holding the tire 80 as to move both o~ them relative to one another.
21~289~
The inventive tire provide3 a symbol with highly precise contours. The contour sidewalls which are only partially and irregularly detectable by the human eye show in conventional colored symbols on tires with colored contour sidewalls irregular colDr contours; in the inventive tire the sidewalls do not have any quality-reducing effects. Preferred, because especially simple and easy to produce, is a tire that comprises a rubber layer of a different color positioned between the reinforcement belt structure and the outer rubber layer forming the exterior tire surface, wherein the rubber layer of the different color formes the bottom o the rece s s .
The inventive method of producing a tire by building a green tire including arranging at least Dn colored rubber layer on a rein~orced tire-building layer and placing a cover layer on top of the colored rubber layer, vulcanizing the green tire, and engraving at least one symbol into the cover layer such that the colored rubber layer is visible within the area of the at least one symbol, allows for the production of a tire with symbols in a simple manner whereby colored symbols 1 21~2897 can be individually applied to the tire even after vulcanization is complete.
Brief Description of the Drawings The obj ect and advantages o the present invention will appear rabre clearly from the following specification in con~unction with the accompanying drawings, in which:
Fig. 1 shows a sectional side view showing the sidewall of the tire with symbols;
Fig. 2 shows a part cross-sectional view of the tire after completed vulcanization;
Fig. 3 shows a part sectional view of the tire ~f Fig 1 along section line III-III with engraved syrnbols;
Fig. ~ shows a schematic representation ~or engraving symbols with the aid o~ a laser into the sidewall of a tire;
Fig. 5 is a schematic representation for po~itioning a tire during laser engraving; and Fig. 6 shows a ~chematic representation as in Fig. 4 but for engraving the 21~2~97 inner liner of a tire.
Description of Preferred Embodiments The present invention will now be described in detai~ with the aid of several specific embodi ment g ut i l i z i ng f igure s 1 through 6 .
~ igures 1 through 3 show a tire of a conventional construction with a carcass 3 ~rtF~n~li n~ over the entire circumference of the tire which in the axial direction of the tire extendJ3 from the left (non-represented) bead core across the left (non-representedl sidewall into the right sidewall 1 and into the right bead core 7. Between the sidewalls 1, in a manner known per se, belt plies 5 and on top thereof a tread strip 6 are applied radially outwardly of the carcass layer. The tire, as is known per se, is also provided with an inner liner 4 which extend over the circumference of the tire and in the axial direction from the right to the left bead cores 7.
The sidewall strip 2 of the sidewall 1 is provided with a recess 8 which extends in the circumferential direction over the entire tire.
The recess 8 is lined with a liner strip 9 and placed on top is a colored rubber strip lo ~o as to be flush with the recess contours. The rubber 21528~7 strip 10 has a color that differs from the color of the sidewall tire-building strip 2. Onto the colored rubber strip 10 a cover strip ll made of rubber material is applied which has the same color as the side wall tire-b~ ; n~ strip 2 whereby the color strip is flush with the outer contour of the sidewall tire-building strip 2 Cover strip 11 and outer contour of the side wall tire=building strip 2 thus from a continuous, uniform course of the outer contour of the sidewall l. ~he liner strip 9 is made of a material that is impermeable to polar substances 80 that such substances can not penetrate the colored material. For example, it is posHible to manufacture the strip 9 from bromobutyl rubber.
In caseE~ in which the transfer risk i~ low, it is also poErsible to omit the strip 9 Af ter the tire building process the green tire is vulcanized in a conventional manner. The engraving of symbols takes place at any desired point in time thereaf ter .
A8 shown in Fig. 4, a laser beam 14 emitted by a CO;, laser with short pulsation rate, for example, lOO ns and a fre~uency within the 10 hertz range, is guided through an aperture plate ` 2~528~
23 for forming the desired etching contour oi~ the laser beam and via a focusing optic 15 and a mirror 1~ is guided onto the sidewall 1 of the tire The laser beam 14 impinges on the sidewall at the point of engraving 17. At the point of engraving 17 the laser beam causes the desired removal of the exterior rubber layer. For producing a desired, predet~orm;n~l engraving the tire has assigned thereto a coordinate system K' the point of origin of which is at the radial center of the tire Such a coordinate system is represented in a two--l; m~n~n~ional representation in Fig. 5a. Fig. 5b ~hows a coordinate system K
corresponding to the focus of the optical laser image with a point of origin within the removal (etching) range 19 of the laser. For the engraving process -the tire is positio~ed on a three-dimensionally movable carriage that is moved with the aid of a drive system of known conetruction connected to a non-repre~ented control computer in a manner known per se, and is moved such that the point of origin of the coordinate system K i~3 positioned at the desired point of engraving 20 within the coordinate system K' of the tire. By continuously comparing the . 2~52897 coordinate sy~tems, the carriage is moved with the aid of the control computer so that the tire is within the removal area of the laser for etching (engraving) the desired symbol.
The output of the laser, as well as the drive speed of the carriage are adjusted relative to one another such that corre~ponding to the shape of the desired symbol 24, as represented in Fig. 1, the cover strip 11 is removed by the laser. As represented in Fig. 3, the area 12 of the cover ctrip which corre3ponds to the symbol is removed with a constant sharp contour line so that the sidewall 21 of the thus produced symbol 24 corresponds to the color of the sidewall 2 and the bottom of the symbol 22 corresponds to the color of the colored rubber strip 10.
It is possible to embody the aperture plate 23 depending on :the desired application for forming the point of engraving 17, for example, as a pictogram, as a ~3imple point, or as a line.
~t i8 also possible to provide one or more moveable def lecting mirrors 16 and to engrave or etch the desired contour of the symbol by the controlled movement of the defIecting mirrors 16 while the laser 13 and tire are stationary.
~52~7 It is also possible to provide the 3trip 10 only over a portion of the circllmference of the tire. Also, a plurality of strips 10 of different colors can be arranged in the circumf erential direction and/or in the radial direction adj acent to one another or spaced from one another. With this measure it is possible to produce symbols of different colors in certain sections. It is also possible to provide a plurality of strips lO of different color~3 atop one another within the reces~ whereby onto the axially outwardly positioned colored rubber strlp the c~ver strip 11 is applied in the same manner as disclosed above.
~y engraving to two different depths, it is possible to provide symbols of different colors in any desired arrangement adj acent to one another .
A8 repre~ented in Fig. 6, it is also possible to guide the laser beam produced by the laser 13 via a plurality of mirror~ 16, 16', 16' ' into the interior of the tire in order to provide the inner liner 4, having a corresponding layer construction, with symbols, ~or example, bar codes. ~t is also possible, when designing the inner liner correspondingly, to provide colored clymbol~ improve recognition of the symbols within ~ 2152~97 the inner portion of the tire. In this context it i3 also po33ible to apply to the inner liner or to a recess within the inner liner a colored rubber layer and to cover thi3 colored rubber layer with an additional rubber layer . Af ter vulcanization a colored 3ymbol can be engraved with the aid of the laser 13.
It i3 also po33ible to employ a multi-functional laser in or~er to use it al30 for other processing 3teps. For example, it is po33ible to remove the burr3 or cut of f the venting nipples resulting from the vulcanization mold with the aid of the laser.
In3tead of the colored rubber material for the strip lo it i3 also pos3ible to use colored materials which have 3imilar ela3tic or plastic properties as rubber, for example, silicone.
It i3 also feasible to make brittle the area of the tire to which the desired symbol iB to be applied by applying fluid3 that remove heat from the tire, for example, liquid nitror~en, and to 3ubsequently engrave with the aid of fine mechanical cut~er3 or millers in the thus prepared rubber material the de3ired symbol by removing the cover strip. After r-rh1n;ng the rubber material - 2152~97 will become elastic due to t~e higher ambient temperature . However, in this context it must be taken into consideration that the rubber material should not be adversely aifected in its desired properties due to the temporary brittleness.
The present invention is, of course, in no way restricted to the specific disclosure of the 3pecification and drawings, but also ~n~ ~-R8e8 any modifications within the scope of the appended claims.
Tires are known on which the ~idewalls are provided with symbols, for example, in the form of letters or numbers representing, for example, the name of the manufacturer, the tire type, size or other tire identification~ symbols. With known tires it is conventional to imprint the respective ~ymbols already before beginning the vulcanization process into the sidewalls while the tire is positioned in the vulcanization mold. Thus, the markings or symbols are already present at the tire before the vulcanization process.
Furthermore it is known to provide tires with symbol~ having a color that differs from the color of the ~idewall of the tire. For manufacturing such tires, a colored rubber strip is inserted into a rece~;s of the outermost rubber layer in the area of the ~idewall and is covered with a rubber ~trip corresponding to the color of the sidewall.
In the vulcanization mold the symbol is then imprinted, before vulcanization takes place, into 21~289~
the rubber layer ~o that projectionl are formed within the sidewall area of the tire which corre~pond to the de~ired ~ymbol~. After completed vulcanization the uppermost imprinted rubber layer is then carefully removed by cutting.
Such method i8, for example, known from United State~ Patent 1 448 286. From German Patent 30 46 664 it i8 kr~own to apply rubber Rtrip~ having cutout portions correRponding to the de~ired cymbol~ which are filled with a colored rubber material. Thece ~trip~ are presced onto the ~idewall of the tire. During the ~ub~equent vulcanization process the applied rubber ctrip i~3 fu~ed to the sidewall. For protecting the symbol~
on the tire again~t damage during the vulcanization proceE~R, German Patent 30 46 664 suggest the u~e Df a protective layer which i~
removed after completed vulcanization. A tire according to US Patent 1 448 286 aR well as a tire according to German Patent 30 46 664 requires a complete determination of the desired cymbol before vulcanization of the tire. According to the individual requirementEi with re~pect to the ~ymbol~ to be provided at each tire, re~pective mold~ and forms for the imprinting proceR~ or molding process must ~e provided. Additional symbols after completion of manufacture o the tire in re8ponse to suddenly required individual cpecifications can not be applied after vulcanization is complete. The high expenditure with respect to individual tools, the limited possibilities for individual manufacture, and the lack of a fle~ible supplemental application of symbols have resulted in high costs and a reluctant application of such 8ymbols on tires.
Furthermore, the determination of the symbols before vulcanization also results in the higher risk of a deviation of the prDduced symbol from the desired symbol and thus in quality 1088 due to the already preformed vulcanization process and the subsequently re~uired ~urther i~reatment which is only partly successful.
It i~ therefore an object of the present invention to provide a method with which with ~imple means after completion of Vul(~ni7~t;~
symbols can be applied to the visible surfaces of a tire accDrding to individual specification as well as to provide a method for producing such tires .
Summary of the Invention 21~2~97 The method of applying at lea~t one symbol onto a vi~ible rubber surface of a tire according to the present invention i8 primarily characterized by:
Vulcanizing at least the vi~ible rubber surf ace of the tire; and engraving at least one Elymbol into the vicible rubber Gurface after the ~tep of vulcanizing .
Preferably, in the ~tep of vulcanizing the complete tire i8 vulcanized.
Advantageously, in the step of engraving the at leaE3t one ~ymbol is etched into the sidewall of the tire_ Preferably, the ~tep of engraving ~ include~
the ctep of changing the color of the surface area where engraving i~ preformed.
Expediently, the ~tep of engraving include~
removing an outer rubber layer to make vi~ible at lea~t one underlying rubber layer of a different color .
Preferably, the method further compri8es, before the step of vulcanizing, the ~teps of building a green tire with a ~idewall 13trip having a re~e~, and bridgLn~ the rece~ w1th an o~ter 21~2897 rubber layer in the form of a rubber strlp that orm a ~nn~;n~ us, recess-free surface with the outer surface of the sidewall strip Preferably, the method further includes the step of arranging i-n the recess a plurality of rubber layers of different colors adjacent to one another in a ci~cumferential direction of the tire for producing in the step of engraving symbols of different colors. In the alternative, the ~Lethod further includes the step of arranging in the recess a plurality of rubber layers of different color ad~ acent to one another in the radial direction of the tire for producing`in the step of engraving symbols of different colors. In yet another embodiment of the present inv~ntion the method further ;n~ the step of arranging in the recess a plurality of rubber layers of different colors a top one another in an axial direction of the tire for producing in the step of en~raving symbols of different colors.
Pref erably, in the step of engraving the at least one symbol is engraved into the surface of the inner liner of t~e tire Advantageou31y, the step of engravi~g lncludes the step of laser-etching the at least ` ~152897 one symbol.
E~xpediently, the step of engraving includes the step~ of applying liquified gases for removing heat energy to the visible rubber 3urface in the area where the at least one sytlbol i~ to be engraved in order to make brittle the visible rubber surface-and cutting the at least one symbol with a mechanical engraving tool into the visible rubber surf ace .
The present invention furthermore relates to a device ior applying at least one symbol onto visible rubber surface of a tire after vulcanizing at least the visible rubber surface of the tire.
According to the pre~ent invention the device i~
primarily characterized by:
a means for receiving and holding a tire;
an engraving device for engraving at least one symbol into a rubber surface of the tire;
a means for driving in a three-dimensional relative m~,v~ t the means receiving and the engraving device relative to Dne ~nother; and means for controlling the means for driving in order to preform the three-dimensional relative r v~ ~nt according to a desired contour of the at least one symbol.
21~28~7 The present invention alæo relates to a tire compri~ing engraved contour~ forming recesses in a continuous surface area of the tire surface for supplying inormation. ~referably, the bottom Df the recesses i~ of a different color than the continuous surface area in the sidewalls of the rec~es. Advantageously, the tire urther comprises a rubber layer of a different color positioned between a reinforcement belt structure and an outer rubber layer forming the l~tF~r; nr tire: surface, wherein the rubber layer of a different color forms the bottom of the recess.
The pre~ent invention also relates to a method of producing a tire comprising engraved contDurs forming recesses in a nr~nt;nl~nus surface area of the tire surface for supplying information, wherein the bottom of the recesses is of a different color than the ~nnt;nllnu~ surface area and the sidewalls of the recesses The method according to the present invention is primarily characterized by.
Building a green tire, including arranging at least one colDred rubber layer on a reinforced tire-building layer and placing a cover layer on top of the colored rubber layer Vulcanizing the green tires; and engraving at least one symbol into the cover layer ~uch that the colored rubber layer is vi:3ible within the area of the at least one symbol .
Advantageously, the reinforced tire-building layer i~ a sidewall strip of the tire.
sy engraving a symbol into the rubber surf ace after completed vulcanization of the tire, arry desired symbol, also symbolE~ that have been decided on after completion of vulcanization, can be applied to the tire without being ~ubjected to any negative effects during the vulcanization proces~. Special measure~ for protecting the symbols during vulcanization are thus obsolete.
Furthf~ pecial individual tools su~h as mold~ or a- plurality of different cutting stamps for the individual tires are no- longer required.
The symbols, if necessary, can be applied to the tire a long time after the vulcanization process.
It is even possible to provide such symbols after production of a particular tire type has already been digcnnt i n~
Advantageously, since especially suitable for mass production and thus correspondingly sirnple 21~897 and inexpensive, the entire tire is fist vulcanized and only after cDmpletion of vulcanization the symbol is engraved into the rubber surf ace .
It i8 especially preferred to engrave the at least one symbol into the sidewall of the tire.
Especially in the area of the sidewall the application of individual symbols is very desirable. Depending on market requirements, on government regulations etc. or changing customer orders, it is thus po~sible to apply new, easily recognizable symbols onto the tire even though the tire production has already been completed.
Advantageous is a method for applying such symbolc when during applying the color of the rubber surface in the area of the symbol is changed. The manufacturer or symbols that differ in color form the surrounding surfaces can be performed ~imply and reliably. The expensive and unsatis:Eactory protective measure~ against spreading of the color or blurring of the co~tours during vulcanization can thus be avoided.
Especially preferred is the inventive method in which the step of engraving includes removing an outer rubber layer to make visible at least one g -` ~ 2152~97 underlying rubber layer of a different color.
Pursuant to individual order~ colored symbols can be applied within a Yhort period of time with simple means. Especially advantageous is a method in which a green tire is build with a sidewall strip having a recess and the recess is bridged with an outer rubber layer in the form of a cover strip that forms a continuoue recess-free surface with the outer ~urface of the sidewall strip.
With these method steps symbols can be applied to the tire without having to content with visible deviations of the sidewall design of the tire.
Depending on the individual desire3 the tire can be offered for ~iale with an exterior sidewall provided without symbole of different color~, but with symbols matching the color of the ~idewall so as to have no apparent exterior deviations with respect to conventional tire3, or with an exterior sidewall having such colored (individual) Hymbols.
2 0 It i~ expedient to arrange in the recess a plurality of rubber layer~ of different ~olors adjacent to one another .in the Gircumferential, axial or radial direction of the tire or producing in the step of engraving symbols of d i f f erent co 1 ors .
21~2897 By providing the symbol at the inner liner of the tire, it is possible to provide the tire with barcodes in a simple manner according to individual specifications after vulcanization is complete .
Preferably, these symbols are applied with the aid of a laser because a laser requires only a small amount of electrical c~rrent and also provides for an especially exact engraving process.
According to another embodiment of the present invention, it is especially advantageous to apply to the rubber surface to be engraved a fluid which will remove heat energy from the surface 80 that the surface area becomes brittle.
Subsequently, the symbol is engraved with simple mechanical engraving tools.
The use of a laser allows, due to the contac~-free engraving process free of mechanical forces, a machining without having to take into consideration the elasticity and plasticity of the rubber. However, by making the surface brittle, a highly precise symbol quality can be achieved also with mechanical engraving tools. Undesirable side effects due to the elastic properties of 2~a289~
rubber are thus not encountered during m~rhln;nr,.
The pre~ent invention furthermore relates to a device for preforming the inventive method. The engraving device and the means for engraving and holding the tire are three-dimensionally moved relative to one another according to the desired contour of the symbol It is thus possible to engrave the tire while taking into account the contour of the tire surf ace and to provide a uniform symbol depth over the entire tire.
Advantageously, the engraving device is stationary and the means for receiving and holding the tire i~ moved three-dimensionally relative to the engraving device. This allows ~or a separation of the co~trol device for controlling the v~ t from tho~e control sLevices for controlling the engraving device and thus preventa problems resulting from such a combined u~e. Xowever, it i~ also possible to control the engraving device three-dimen~ir,nally and to provide a stationary means for receiving and holding the tire. It is furthermore possible to control the movement of the engraving device as well as the movement of the means f or receiving and holding the tire 80 as to move both o~ them relative to one another.
21~289~
The inventive tire provide3 a symbol with highly precise contours. The contour sidewalls which are only partially and irregularly detectable by the human eye show in conventional colored symbols on tires with colored contour sidewalls irregular colDr contours; in the inventive tire the sidewalls do not have any quality-reducing effects. Preferred, because especially simple and easy to produce, is a tire that comprises a rubber layer of a different color positioned between the reinforcement belt structure and the outer rubber layer forming the exterior tire surface, wherein the rubber layer of the different color formes the bottom o the rece s s .
The inventive method of producing a tire by building a green tire including arranging at least Dn colored rubber layer on a rein~orced tire-building layer and placing a cover layer on top of the colored rubber layer, vulcanizing the green tire, and engraving at least one symbol into the cover layer such that the colored rubber layer is visible within the area of the at least one symbol, allows for the production of a tire with symbols in a simple manner whereby colored symbols 1 21~2897 can be individually applied to the tire even after vulcanization is complete.
Brief Description of the Drawings The obj ect and advantages o the present invention will appear rabre clearly from the following specification in con~unction with the accompanying drawings, in which:
Fig. 1 shows a sectional side view showing the sidewall of the tire with symbols;
Fig. 2 shows a part cross-sectional view of the tire after completed vulcanization;
Fig. 3 shows a part sectional view of the tire ~f Fig 1 along section line III-III with engraved syrnbols;
Fig. ~ shows a schematic representation ~or engraving symbols with the aid o~ a laser into the sidewall of a tire;
Fig. 5 is a schematic representation for po~itioning a tire during laser engraving; and Fig. 6 shows a ~chematic representation as in Fig. 4 but for engraving the 21~2~97 inner liner of a tire.
Description of Preferred Embodiments The present invention will now be described in detai~ with the aid of several specific embodi ment g ut i l i z i ng f igure s 1 through 6 .
~ igures 1 through 3 show a tire of a conventional construction with a carcass 3 ~rtF~n~li n~ over the entire circumference of the tire which in the axial direction of the tire extendJ3 from the left (non-represented) bead core across the left (non-representedl sidewall into the right sidewall 1 and into the right bead core 7. Between the sidewalls 1, in a manner known per se, belt plies 5 and on top thereof a tread strip 6 are applied radially outwardly of the carcass layer. The tire, as is known per se, is also provided with an inner liner 4 which extend over the circumference of the tire and in the axial direction from the right to the left bead cores 7.
The sidewall strip 2 of the sidewall 1 is provided with a recess 8 which extends in the circumferential direction over the entire tire.
The recess 8 is lined with a liner strip 9 and placed on top is a colored rubber strip lo ~o as to be flush with the recess contours. The rubber 21528~7 strip 10 has a color that differs from the color of the sidewall tire-building strip 2. Onto the colored rubber strip 10 a cover strip ll made of rubber material is applied which has the same color as the side wall tire-b~ ; n~ strip 2 whereby the color strip is flush with the outer contour of the sidewall tire-building strip 2 Cover strip 11 and outer contour of the side wall tire=building strip 2 thus from a continuous, uniform course of the outer contour of the sidewall l. ~he liner strip 9 is made of a material that is impermeable to polar substances 80 that such substances can not penetrate the colored material. For example, it is posHible to manufacture the strip 9 from bromobutyl rubber.
In caseE~ in which the transfer risk i~ low, it is also poErsible to omit the strip 9 Af ter the tire building process the green tire is vulcanized in a conventional manner. The engraving of symbols takes place at any desired point in time thereaf ter .
A8 shown in Fig. 4, a laser beam 14 emitted by a CO;, laser with short pulsation rate, for example, lOO ns and a fre~uency within the 10 hertz range, is guided through an aperture plate ` 2~528~
23 for forming the desired etching contour oi~ the laser beam and via a focusing optic 15 and a mirror 1~ is guided onto the sidewall 1 of the tire The laser beam 14 impinges on the sidewall at the point of engraving 17. At the point of engraving 17 the laser beam causes the desired removal of the exterior rubber layer. For producing a desired, predet~orm;n~l engraving the tire has assigned thereto a coordinate system K' the point of origin of which is at the radial center of the tire Such a coordinate system is represented in a two--l; m~n~n~ional representation in Fig. 5a. Fig. 5b ~hows a coordinate system K
corresponding to the focus of the optical laser image with a point of origin within the removal (etching) range 19 of the laser. For the engraving process -the tire is positio~ed on a three-dimensionally movable carriage that is moved with the aid of a drive system of known conetruction connected to a non-repre~ented control computer in a manner known per se, and is moved such that the point of origin of the coordinate system K i~3 positioned at the desired point of engraving 20 within the coordinate system K' of the tire. By continuously comparing the . 2~52897 coordinate sy~tems, the carriage is moved with the aid of the control computer so that the tire is within the removal area of the laser for etching (engraving) the desired symbol.
The output of the laser, as well as the drive speed of the carriage are adjusted relative to one another such that corre~ponding to the shape of the desired symbol 24, as represented in Fig. 1, the cover strip 11 is removed by the laser. As represented in Fig. 3, the area 12 of the cover ctrip which corre3ponds to the symbol is removed with a constant sharp contour line so that the sidewall 21 of the thus produced symbol 24 corresponds to the color of the sidewall 2 and the bottom of the symbol 22 corresponds to the color of the colored rubber strip 10.
It is possible to embody the aperture plate 23 depending on :the desired application for forming the point of engraving 17, for example, as a pictogram, as a ~3imple point, or as a line.
~t i8 also possible to provide one or more moveable def lecting mirrors 16 and to engrave or etch the desired contour of the symbol by the controlled movement of the defIecting mirrors 16 while the laser 13 and tire are stationary.
~52~7 It is also possible to provide the 3trip 10 only over a portion of the circllmference of the tire. Also, a plurality of strips 10 of different colors can be arranged in the circumf erential direction and/or in the radial direction adj acent to one another or spaced from one another. With this measure it is possible to produce symbols of different colors in certain sections. It is also possible to provide a plurality of strips lO of different color~3 atop one another within the reces~ whereby onto the axially outwardly positioned colored rubber strlp the c~ver strip 11 is applied in the same manner as disclosed above.
~y engraving to two different depths, it is possible to provide symbols of different colors in any desired arrangement adj acent to one another .
A8 repre~ented in Fig. 6, it is also possible to guide the laser beam produced by the laser 13 via a plurality of mirror~ 16, 16', 16' ' into the interior of the tire in order to provide the inner liner 4, having a corresponding layer construction, with symbols, ~or example, bar codes. ~t is also possible, when designing the inner liner correspondingly, to provide colored clymbol~ improve recognition of the symbols within ~ 2152~97 the inner portion of the tire. In this context it i3 also po33ible to apply to the inner liner or to a recess within the inner liner a colored rubber layer and to cover thi3 colored rubber layer with an additional rubber layer . Af ter vulcanization a colored 3ymbol can be engraved with the aid of the laser 13.
It i3 also po33ible to employ a multi-functional laser in or~er to use it al30 for other processing 3teps. For example, it is po33ible to remove the burr3 or cut of f the venting nipples resulting from the vulcanization mold with the aid of the laser.
In3tead of the colored rubber material for the strip lo it i3 also pos3ible to use colored materials which have 3imilar ela3tic or plastic properties as rubber, for example, silicone.
It i3 also feasible to make brittle the area of the tire to which the desired symbol iB to be applied by applying fluid3 that remove heat from the tire, for example, liquid nitror~en, and to 3ubsequently engrave with the aid of fine mechanical cut~er3 or millers in the thus prepared rubber material the de3ired symbol by removing the cover strip. After r-rh1n;ng the rubber material - 2152~97 will become elastic due to t~e higher ambient temperature . However, in this context it must be taken into consideration that the rubber material should not be adversely aifected in its desired properties due to the temporary brittleness.
The present invention is, of course, in no way restricted to the specific disclosure of the 3pecification and drawings, but also ~n~ ~-R8e8 any modifications within the scope of the appended claims.
Claims (18)
1. A method of applying at least one symbol onto a visible rubber surface of a tire, said method comprising the steps of:
vulcanizing at least the visible rubber surface of the tire; and engraving at least one symbol into the visible rubber surface after the step of vulcanizing.
vulcanizing at least the visible rubber surface of the tire; and engraving at least one symbol into the visible rubber surface after the step of vulcanizing.
2. A method according to claim 1, wherein in said step of vulcanizing the complete tire is vulcanized.
3. A method according to claim 1, wherein in said step of engraving the at least one symbol is engraved into a sidewall of the tire.
4. A method according to claim 1, wherein said step of engraving includes the step of changing the color of the surface area where engraving is performed.
5. A method according to claim 1, wherein said step of engraving includes removing an outer rubber layer to make visible at least one underlying rubber layer of a different color.
6. A method according to claim 5, further comprising, before said step of vulcanizing, the steps of:
building a green tire with a sidewall strip having a recess; and bridging the recess with an outer rubber layer in the form of a cover strip that forms a continuous, recess-free surface with the outer surface of the sidewall strip.
building a green tire with a sidewall strip having a recess; and bridging the recess with an outer rubber layer in the form of a cover strip that forms a continuous, recess-free surface with the outer surface of the sidewall strip.
7. A method according to claim 6, further including the step of arranging in the recess a plurality of rubber layers of different colors adjacent to one another in a circumferential direction of the tire for producing in said step of engraving symbols of different colors.
8. A method according to claim 6, further including the step of arranging in the recess a plurality of rubber layers of different colors adjacent to one another in a radial direction of the tire for producing in said step of engraving symbols of different colors.
9. A method according to claim 6, further including the step of arranging in the recess a plurality of rubber layers of different colors atop one another in an axial direction of the tire for producing in said step of engraving symbols of different colors.
10. A method according to claim 1, wherein in said step of engraving the at least one symbol is engraved into the surface of an inner liner of the tire.
11. A method according to claim 1, wherein said step of engraving includes the step of laser-etching the at least one symbol.
12. A method according to claim 1, wherein said step of engraving includes the steps of:
applying liquefied gases for removing heat energy to the visible rubber surface in the area where the at least one symbol is to be engraved in order to make brittle the visible rubber surface;
and cutting the at least one symbol with a mechanical engraving tool into the visible rubber surface.
applying liquefied gases for removing heat energy to the visible rubber surface in the area where the at least one symbol is to be engraved in order to make brittle the visible rubber surface;
and cutting the at least one symbol with a mechanical engraving tool into the visible rubber surface.
13. A device for applying at least one symbol into a visible rubber surface of a tire after vulcanizing at least the visible rubber surface of the tire, said device comprising:
a means for receiving and holding a tire;
an engraving device for engraving at least one symbol into a visible rubber surface of the tire;
a means for driving in a three-dimensional relative movement said means for receiving and said engraving device relative to one another; and means for controlling said means for driving in order to perform the three-dimensional relative movement according to a desired contour of the at least one symbol.
a means for receiving and holding a tire;
an engraving device for engraving at least one symbol into a visible rubber surface of the tire;
a means for driving in a three-dimensional relative movement said means for receiving and said engraving device relative to one another; and means for controlling said means for driving in order to perform the three-dimensional relative movement according to a desired contour of the at least one symbol.
14. A tire comprising engraved contours forming recesses in a continuous surface area of the tire surface for supplying information.
15. A tire according to claim 14, wherein a bottom of said recesses is of a different color than said continuous surface area and the sidewalls of said recesses.
16. A tire according to claim 15, comprising a rubber layer of said different color positioned between a reinforcement belt structure and an outer rubber layer forming the exterior-tire surface, said rubber layer of said different color forming the bottom of said recesses.
17. A method of producing a tire comprising engraved contours forming recesses in a continuous surface area of the tire surface for supplying information, wherein a bottom of said recesses is of a different color than said continuous surface area and the sidewalls of said recesses, said method comprising the steps of:
building a green tire, including arranging at least one colored rubber layer on a reinforced tire-building layer and placing a cover layer on top of said color rubber layer;
vulcanizing the green tire; and engraving at least one symbol into said cover layer such that said colored rubber layer is visible within the area of said at least one symbol.
building a green tire, including arranging at least one colored rubber layer on a reinforced tire-building layer and placing a cover layer on top of said color rubber layer;
vulcanizing the green tire; and engraving at least one symbol into said cover layer such that said colored rubber layer is visible within the area of said at least one symbol.
18. A method according to claim 18, wherein said reinforced tire-building layer is a sidewall strip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4422548.2 | 1994-06-28 | ||
| DE19944422548 DE4422548C2 (en) | 1994-06-28 | 1994-06-28 | Applying a mark to a visible surface of a tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2152897A1 true CA2152897A1 (en) | 1995-12-29 |
Family
ID=6521672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2152897 Abandoned CA2152897A1 (en) | 1994-06-28 | 1995-06-28 | Method of applying a symbol onto a visible surface of a tire |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0689948A3 (en) |
| JP (1) | JPH0852822A (en) |
| CA (1) | CA2152897A1 (en) |
| DE (1) | DE4422548C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105452021A (en) * | 2013-08-07 | 2016-03-30 | 米其林企业总公司 | Tire comprising a particular graphic element |
| EP3135424A1 (en) | 2015-08-28 | 2017-03-01 | Continental Reifen Deutschland GmbH | Method for introducing structures into the surface of a pneumatic tyre for a vehicle |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19507486C2 (en) * | 1995-03-03 | 1998-08-06 | Continental Ag | Process for making a tire |
| DE19549501C2 (en) * | 1995-03-03 | 1998-06-10 | Continental Ag | Pneumatic winter tyre mfr. and tyre |
| DE19531332C2 (en) * | 1995-08-25 | 1998-07-16 | Beiersdorf Ag | Use of labels for marking rubber parts, in particular tires |
| DE102005052647A1 (en) | 2005-11-04 | 2007-05-10 | Continental Aktiengesellschaft | Vehicle tires |
| US20070196625A1 (en) * | 2006-02-21 | 2007-08-23 | Anderson Daryl E | Method and apparatus for secure object labeling |
| US9073383B2 (en) | 2008-06-06 | 2015-07-07 | Illinois Tool Works Inc. | Heat transfer label variable data indicator and method of making same |
| DE102008028780A1 (en) * | 2008-06-17 | 2009-12-24 | Continental Aktiengesellschaft | Pneumatic vehicle tire with rim protection rib |
| DE102009044718A1 (en) | 2009-12-01 | 2011-06-09 | Contitech Ag | Laser-markable rubber products, useful as tire, hose, strap air spring or belt, comprises a rubber mixture that is formed from diene rubber e.g. natural or synthetic polyisoprene, and a laser-sensitive pigment e.g. metal oxide coated mica |
| JP5529643B2 (en) * | 2010-06-22 | 2014-06-25 | 株式会社ブリヂストン | How to display a string on a pneumatic tire |
| JP5519812B1 (en) * | 2013-01-09 | 2014-06-11 | 株式会社ブリヂストン | Pneumatic tire |
| EP2905125B1 (en) * | 2014-02-10 | 2017-08-30 | 4JET Technologies GmbH | Digital coding of rubber articles |
| JP6361244B2 (en) * | 2014-04-07 | 2018-07-25 | 横浜ゴム株式会社 | tire |
| EP3095596A1 (en) * | 2015-05-21 | 2016-11-23 | 4JET Technologies GmbH | Recess pattern in a rubber article |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1448286A (en) * | 1922-10-25 | 1923-03-13 | Jackson D Comstock | Method of decorating automobile tire casings |
| SE331902B (en) * | 1966-06-17 | 1971-01-18 | Kyowa Rubber Ind Co Ltd | |
| US4041652A (en) * | 1976-06-04 | 1977-08-16 | The Goodyear Tire & Rubber Company | Apparatus for engraving the sidewall of a tire |
| DE2640343A1 (en) * | 1976-09-08 | 1978-03-09 | Rudolf Bach | Vehicle tyre identification system - has ribbed panels on which may be engraved vehicle identification data |
| CA1157103A (en) * | 1980-09-29 | 1983-11-15 | Bruce J. Renaud | Cured tire and method of engraving the same |
| DE3046664A1 (en) * | 1980-12-11 | 1982-07-15 | Continental Gummi-Werke Ag, 3000 Hannover | Integral lettering in tyre sidewalls - where negatively patterned rubber strip receives contrasting lettering before being vulcanised with tyre |
| US4512839A (en) * | 1982-10-29 | 1985-04-23 | Gerber Scientific, Inc. | Multi-color sign making method and layup |
| DE4134271C1 (en) * | 1991-10-17 | 1992-12-24 | Leonhard Kurz Gmbh & Co, 8510 Fuerth, De | |
| EP0650824B1 (en) * | 1993-11-03 | 2000-06-14 | Bridgestone Corporation | Method and apparatus for ablative processing of elastomeric products |
-
1994
- 1994-06-28 DE DE19944422548 patent/DE4422548C2/en not_active Expired - Lifetime
-
1995
- 1995-06-16 EP EP95109339A patent/EP0689948A3/en not_active Ceased
- 1995-06-27 JP JP7161004A patent/JPH0852822A/en not_active Withdrawn
- 1995-06-28 CA CA 2152897 patent/CA2152897A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105452021A (en) * | 2013-08-07 | 2016-03-30 | 米其林企业总公司 | Tire comprising a particular graphic element |
| EP3135424A1 (en) | 2015-08-28 | 2017-03-01 | Continental Reifen Deutschland GmbH | Method for introducing structures into the surface of a pneumatic tyre for a vehicle |
| DE102015216524A1 (en) | 2015-08-28 | 2017-03-02 | Continental Reifen Deutschland Gmbh | Method for introducing structures into the surface of a pneumatic vehicle tire |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4422548A1 (en) | 1996-01-04 |
| EP0689948A2 (en) | 1996-01-03 |
| DE4422548C2 (en) | 1997-08-07 |
| JPH0852822A (en) | 1996-02-27 |
| EP0689948A3 (en) | 1996-07-24 |
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