US3024829A - Tyre breaker made of separate parallelogram-shaped sections - Google Patents

Tyre breaker made of separate parallelogram-shaped sections Download PDF

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Publication number
US3024829A
US3024829A US758122A US75812258A US3024829A US 3024829 A US3024829 A US 3024829A US 758122 A US758122 A US 758122A US 75812258 A US75812258 A US 75812258A US 3024829 A US3024829 A US 3024829A
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US
United States
Prior art keywords
sections
section
cords
band
filaments
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.)
Expired - Lifetime
Application number
US758122A
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English (en)
Inventor
Cooper David Henry D Oyly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dunlop Rubber Co Ltd
Original Assignee
Dunlop Rubber Co Ltd
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Filing date
Publication date
Application filed by Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
Priority claimed from GB2991257A external-priority patent/GB894706A/en
Application granted granted Critical
Publication of US3024829A publication Critical patent/US3024829A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y10T152/10801—Structure made up of two or more sets of plies wherein the reinforcing cords in one set lie in a different angular position relative to those in other sets

Definitions

  • a reinforcement for the tread region of a pneumatic tyre cover comprises a plurality of substantially parallelogram-shaped sections of tyre-building fabric incorporating a plurality of parallel filaments or cords, the sections being disposed to form an endless band with the filaments or cords of the sections substantially uniformly distributed around the band, each section being interleaved between two adjacent sections with a portion of each section overlying one of the adjacent sections and another portion underlying the other adjacent section.
  • Substantially one-half of each section may overlie one of the adjacent sections, the remaining half underlying the other adjacent section, the overlying and underlying halves being either substantially triangularor trapezoidal-shaped.
  • the angular disposition of the filaments or cords in alternate sections is preferably the same as and of opposite sense to the angular disposition of the filaments or cords in the remaining sections.
  • each substantially parallelogram-shaped section are rectilinear but they may each be inclined at a different angle along a part or parts of its length compared with the remainder of its length or they may each be curved.
  • the sections may be arranged in three or more tiers, each section being interleaved between adjacent sections and extending for a portion of its length in each tier.
  • the angular disposition of the filaments or cords in alternate sections is the same as but of different numerical value from that of the filaments or cords in the remaining sections.
  • each section overlies or underlies the central portion of the middle of three adjacent sections while each of the end portions of each section respectively underlies or overlies an end portion of one of the outer of the three adjacent sections.
  • the invention also includes pneumatic tyre covers incorporating tread reinforcements of the above-mentioned kind.
  • a method of manufacturing a reinforcement for the tread region of a pneumatic tyre cover comprises assembling a plurality of sub stantially parallelogram-shaped sections of tyre-building fabric, each incorporating a plurality of parallel filaments or cords, in overlapping relationship one with the other to form an endless band with the filaments or cords of the sections substantially uniformly distributed around the hand.
  • the method comprises overlapping the substantially parallelogram-shaped sections so that each section is interleaved between two adjacent sections, the filaments or cords in each section being of opposite bias angle to those of the adjacent sections, substantially one-half of each section lying above one of the adjacent sections and the remain ing portion lying below the other adjacent section, the overlying and the underlying halves each being either substantially triangularor trapezoidal-shaped.
  • the tyre-building fabric is preferably rubberized and may be of weftless or woven, e.g., square woven, construction.
  • the material of the filaments or cords may be steel, a textile material, e.g., cotton or rayon, a synthetic material, either in monofilamentary or staple form, e.g., nylon or polyethylene terephthalate which may be, for example, Terylene (the word Terylene is a registered trademark).
  • Terylene the word Terylene is a registered trademark.
  • Reinforcement bands in accordance with the invention can be used alone or in conjunction with a conventional breaker or breakers, for example, a strip of rubberized weftless steel cord fabric, having the cords disposed at to the mid-circumferential line of the cover carrying the breaker.
  • the band or the bands and breaker or breakers may be mounted on a carcass reinforced with material having filaments or cords disposed at, e.g., about 45 or 90, the filaments or cords being of any suitable material e.g. textile material or steel.
  • FIGURE 1 shows a diagrammatic plan view of a basket-weave breaker band in fiat form with the parallelogram-shaped sections displaced sideways with respect to each other from their normal position in which the sides of all the sections are in alignment.
  • FIGURE 2 is a similar view to that shown in FIGURE 1 of an alternative construction.
  • FIGURE 3 is a cross-sectional view taken along the line 3-3 shown both in FIGURES 1 and 2.
  • FIGURE 4 is a cross-sectional view taken along the line 4-4 shown both in FIGURES 1 and 2.
  • FIGURE 5 shows a diagrammatic perspective view of a further alternative construction in flat band form with the parallelogram-shaped sections in alignment.
  • FIGURE 6 shows a diagrammatic end view of the construction shown in FIGURE 5 with the band in annular form.
  • FIGURE 7 shows a similar view to that shown in FIGURE 1 of a further alternative construction.
  • FIGURE 8 shows a diagrammatic developed planview of a further alternative construction with the parallelogram-shaped sections in alignment.
  • the band is of endless interwoven form and is integral at the chaindotted lines.
  • a reinforcement band is constructed by cutting 6 exactly similar parallelogram-shaped sections 11 from a length of weftless fabric incorporating rubberized steel cords 12, each of the sections having steel cords running parallel with one pair (13a and 13b) of opposite sides.
  • the perpendicular distance between the second pair (14a and 14b) of opposite sides is equal to the width of the finished band.
  • the ratio of the length of a side of the first pair to that of a side of the second pair is made such that a line 15 drawn from the point of intersection of the two sides 13a and 14b and passing at right angles through 3 the other side 14a, divides the side 14a into two equal arts.
  • the six sections are then assembled in overlapping and interleaving relationship one with another to form an endless band in the following manner.
  • a first section A is laid upon the surface of a table and a second section B is laid upon the first so that the opposite sides 14a and 14b of section B are parallel to and coextensive with the sides 14a and 14b of section A, the cords of section B crossing those of section A.
  • a third section C is laid upon the section B in a similar manner, the cords in section C crossing those in section B.
  • Sections D, E and F are assembled as described in connection with the sections A, B and C to form a single band.
  • the section F is then brought into overlapping relationship with the section A so as to form an endless band.
  • the band thus formed is made up of sections comprising cords which pass from one side of the band to the other, and, in a preferred construction are disposed at an angle of 18 to the mid-circumferential line of the endless band, substantially all of the cords of each section passing from the outer surface of the band under an overlapping section to the inner surface thereof.
  • the cords n the outer surface of the band cross those on the inner surface.
  • Substantially one half of each section lies above one of the adjacent sections and the remaining half lies below the other adjacent section, the overlying and the underlying halves each being triangular in shape.
  • the 'cords 13a and 13b at the adjacent edges of any alternate pair of sections lie closely parallel to each other but are separated by the cords of the intervening section.
  • cords are substantially uniformly distributed around the band, there being, at any cross-section of the band, two parallel sets of cords spaced at substantially equal intervals in each set.
  • the cross-sectional views shown in FIGURES 3 and 4 illustrate the fact, that substantially throughout the band, the parallelogram sections pass from the upper surface to the lower surface of the band (FIG- URE 3) while, at isolated positions, the band consists of one section above another (FIGURE 4).
  • the band may then be located around the periphery of a tyre carcass; previously constructed and partially shaped 'to assume U-shaped cross-section, the construction of the tyre cover being completed in the usual manner and the assembled cover moulded and vulcanized.
  • FIGURE 1 The construction shown in FIGURE 1 with the cords in the sections disposed at 18 to the mid-circumferential plane of the endless band may be assembled on a tyre carcass in the tread region together with a conventional breaker layer of parallel steel cordsdisposed at 90 to the said plane.
  • the band is assembled, after the manner described, directly around the periphery of a tyre carcass.
  • any even number of parallelogram-shaped sections may be utilized to form a band in accordance with the invention the number utilized depending on the angle of the cords required in thefinished band, its width and its length.
  • FIGURE Z illustrates an alternative construction in which the ratio of the length of a side of one pair of sides to that of a side of the second pair of sides is not, in contrast to the construction shown in FIGURE 1, critical.
  • the six parallelogram-shaped sections are again exactly similar and made from a length of weftless fabric incorporating rubberized steel cords running parallel to the opposite pair of sides 16a and 161). They are assembled in similar manner to that which is described in connection'with FIGURE 1 with the exception that in the finished band trapezoidalshaped, instead of triangular-shaped halves of each section are disposed one half above an adjacent section and the other half below the other adjacent section.
  • the cords 16a and l6b'at the adjacent edges .ofany alternate 4, pair of sections lie closely parallel to each other but ar separated by th cords of an intervening section.
  • each parallelogramshaped section is of the kind used in the construction of FIGURES 1 and 2 but of greater length in proportion to its width, and is disposed in four tiers.
  • Each section when the band is joined end-to-end is overlaid, for a part of its length by one, then by two, then by three other sections.
  • section P is first overlaid by section Q. It is then overlaid by sections Q and R and then by sections Q, R and S. This can be seen in both FIG- URE 5 and FIGURE 6.
  • the arrangement is such that the angular disposition of cords in overlying portions is opposite to that of the portions which are overlaid.
  • FIGURE 7 illustrates a further arrangement which is made up from parallelogram-shaped sections of two different kinds.
  • the parallelogram-shaped sections 17 are of the kind utilized in the construction illustrated in FIG- URE 2 and the parallelogram-shaped sections 18 are of similar kind but composed of parallel cords disposed at to their longitudinal sides 18a.
  • the two types of sec tions are assembled in turn, one half of each section (say of the first type 17) lying above an adjacent section of the other type (18) and the other half of the section lying below the other adjacent section also of type 18.
  • each parallelogram-shaped section is of the kind used in the constructions of FIGURES l and 2 but of greater Width 1n proportion to its length.
  • Sections a a a and 41 are of the same bias angle but of opposite sense to that of sections b b b and b,,.
  • the sections are assembled so that each section is interleaved between three adjacent sections instead of between two as in the case with the constructions of FIGURES 1 and 2.
  • the central portion of section a overlies the central portion of section b while one end of section a underlies section 12 and the other end of it underlies section [2 on the other band, the central portion of section b underlies the central portion of section 0 while one end of section b;., overlies section a and the other end of it overlies section 2.
  • Reinforcement bands in accordance with the invention may be constructed with the cords in the finished band disposed at any angle required with the cords lying parallel to either one or the other of the opposed pairs of sides of th parallelograms.
  • An advantage of the tread reinforcements according to the invention is that there is substantially no residual cornering force since the angular disposition of the cords on the radially outermost surface of the reinforcement changes several times around the complete circumference of the tyre as a result of the interweaving of parallelogram-shaped sections.
  • a reinforcement for the tread region of a pneumatic tyre cover comprising a plurality of separate parallelogram-shaped sections of tyre building fabric incorporating a plurality of parallel filaments, the sections being disposed to form an endless band with the filaments of the sections substantially uniformly distributed around the band, each section being interleaved between two adjacent sections with a portion of each section overlying one of the adjacent sections and another portion underlying the other adjacent section.
  • a reinforcement according to claim 2 wherein substantially one half of each section overlies one of the adjacent sections and the remaining half underlies the other adjacent section, the overlying and the underlying halves each being substantially triangular-shaped.
  • a reinforcement for the tread region of a pneumatic tyre cover comprising a plurality of separate parallelogram-shaped sections of tyre building fabric incorporating a plurality of parallel filaments, the sections being disposed in at least three tiers to form an endless band and each section being interleaved between adjacent sections and extending for a portion of its length in each tier, the angular disposition of the filaments in alternate sections being the same as and of opposite sense to that of the cords or filaments in the remaining sections.
  • a reinforcement for the tread region of a pneumatic tyre cover comprising a plurality of separate parallelogram-shaped sections of tyre building fabric incorporating a plurality of parallel filaments, the sections being disposed to form an endless band and each section being interleaved between two adjacent sections with a portion of each section overlying one of the adjacent sections and the remaining portion underlying the other adjacent section and the angular disposition of the filaments in alternate sections being the same as but of different numerical value from that of the filaments in the remaining sections.
  • a reinforcement for the tread region of a pneumatic tyre cover comprising a plurality of separate parallelogram-shaped sections of tyre building fabric incorporating a plurality of parallel filaments, the sections being disposed to form a continuous band and each section being interleaved between three adjacent sections, the filaments in each section having the same bias angle as but of opposite sense to that of the three adjacent sections, and each section having the two outer of the three adjacent sections passing on the same side thereof while the middle of the three adjacent sections passes on the other side thereof.
  • a pneumatic tyre cover incorporating in the tread region a reinforcement comprising a plurality of separate parallelogram-shaped sections of tyre building fabric incorporating a plurality of parallel filaments, the sections being disposed to form an endless band with the filaments of the sections substantially uniformly distributed around the band, each section being interleaved between two adjacent sections with a portion of each section overlying one of the adjacent sections and another portion underlying the other adjacent section.
  • a pneumatic tyre cover according to claim 10 incorporating in the tread region an additional reinforcement comprising a layer of steel wire filaments disposed at to the mid-circumferential plane of the tyre.
  • a method of manufacturing a reinforcement for the tread region of a pneumatic tyre cover comprising assembling a plurality of separate parallelogram-shaped sections of tyre-building fabric, each incorporating a plurality of parallel filaments, in overlapping relationship one with the other to form an endless band with the filaments of the sections substantially uniformly distributed around the band.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
US758122A 1957-09-24 1958-08-29 Tyre breaker made of separate parallelogram-shaped sections Expired - Lifetime US3024829A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3024829X 1957-09-24
GB2991257A GB894706A (en) 1958-09-02 1958-09-02 Improvements in or relating to pneumatic tyres

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US3024829A true US3024829A (en) 1962-03-13

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US (1) US3024829A (is)
BE (1) BE571452A (is)
CH (1) CH349892A (is)
DE (1) DE1181574B (is)
DK (1) DK102782C (is)
FR (1) FR1211678A (is)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217778A (en) * 1963-10-02 1965-11-16 Goodyear Tire & Rubber Pneumatic cord tire
US3298417A (en) * 1962-12-26 1967-01-17 Du Pont Pneumatic tire
US3563296A (en) * 1968-11-18 1971-02-16 Thomas A Wells Folded endless reinforcement for pneumatic tires
US3770042A (en) * 1970-09-03 1973-11-06 Deering Milliken Res Corp Endless reinforcement and method for producing same
US3898116A (en) * 1972-11-09 1975-08-05 Bridgestone Tire Co Ltd Method and apparatus for manufacturing a structure for a green tire
US4325423A (en) * 1979-04-24 1982-04-20 Continental Gummi-Werke Aktiengesellschaft Pneumatic tires, especially belted tires
US5358187A (en) * 1992-09-09 1994-10-25 Ward Paula M L Methods of and apparatus for producing improved bedding materials from scrap newspaper

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294330A (en) * 1915-07-27 1919-02-11 Joseph M Gilbert Tire-casing and process of making same.
US1345994A (en) * 1919-08-02 1920-07-06 Joseph M Gilbert Pneumatic-tire casing and process for making same
US1734241A (en) * 1926-03-22 1929-11-05 Fisk Rubber Co Pneumatic tire casing
US2501644A (en) * 1946-01-26 1950-03-21 Gen Tire & Rubber Co Method of building steel cable tire ply bands
US2703132A (en) * 1950-09-27 1955-03-01 Darrow Burgess Method of making pneumatic tires having equalized stresses in the reinforcing cords therein
GB771570A (en) * 1954-06-23 1957-04-03 Dunlop Rubber Co Improvements in or relating to pneumatic tyres
GB780765A (en) * 1954-03-05 1957-08-07 Pirelli Improvements in or relating to pneumatic vehicle wheel tyres

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB753533A (en) * 1953-12-03 1956-07-25 Dunlop Rubber Co Improvements in or relating to pneumatic tyres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294330A (en) * 1915-07-27 1919-02-11 Joseph M Gilbert Tire-casing and process of making same.
US1345994A (en) * 1919-08-02 1920-07-06 Joseph M Gilbert Pneumatic-tire casing and process for making same
US1734241A (en) * 1926-03-22 1929-11-05 Fisk Rubber Co Pneumatic tire casing
US2501644A (en) * 1946-01-26 1950-03-21 Gen Tire & Rubber Co Method of building steel cable tire ply bands
US2703132A (en) * 1950-09-27 1955-03-01 Darrow Burgess Method of making pneumatic tires having equalized stresses in the reinforcing cords therein
GB780765A (en) * 1954-03-05 1957-08-07 Pirelli Improvements in or relating to pneumatic vehicle wheel tyres
GB771570A (en) * 1954-06-23 1957-04-03 Dunlop Rubber Co Improvements in or relating to pneumatic tyres

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298417A (en) * 1962-12-26 1967-01-17 Du Pont Pneumatic tire
US3217778A (en) * 1963-10-02 1965-11-16 Goodyear Tire & Rubber Pneumatic cord tire
US3563296A (en) * 1968-11-18 1971-02-16 Thomas A Wells Folded endless reinforcement for pneumatic tires
US3770042A (en) * 1970-09-03 1973-11-06 Deering Milliken Res Corp Endless reinforcement and method for producing same
US3898116A (en) * 1972-11-09 1975-08-05 Bridgestone Tire Co Ltd Method and apparatus for manufacturing a structure for a green tire
US4325423A (en) * 1979-04-24 1982-04-20 Continental Gummi-Werke Aktiengesellschaft Pneumatic tires, especially belted tires
US5358187A (en) * 1992-09-09 1994-10-25 Ward Paula M L Methods of and apparatus for producing improved bedding materials from scrap newspaper

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Publication number Publication date
BE571452A (is) 1958-10-15
FR1211678A (fr) 1960-03-17
CH349892A (fr) 1960-10-31
DE1181574B (de) 1964-11-12
DK102782C (da) 1965-10-04

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