US3206201A - Bowling ball structures and their manufacture - Google Patents

Bowling ball structures and their manufacture Download PDF

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Publication number
US3206201A
US3206201A US142235A US14223561A US3206201A US 3206201 A US3206201 A US 3206201A US 142235 A US142235 A US 142235A US 14223561 A US14223561 A US 14223561A US 3206201 A US3206201 A US 3206201A
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Prior art keywords
core
veneer
chips
ball
lbs
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US142235A
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English (en)
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John G Hendricks
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Stowe Woodward LLC
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Stowe Woodward LLC
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Priority to US142235A priority Critical patent/US3206201A/en
Priority to DE19621453057 priority patent/DE1453057A1/de
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0001—Balls with finger holes, e.g. for bowling
    • 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
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0042—Producing plain balls
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
    • B29K2061/04—Phenoplasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/54—Balls
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/02—Styrene
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/03—Epoxy
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/05—Vinyl
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/08—Urethane
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/09—Ester
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/10—Butadiene
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/16—Acrylic

Definitions

  • the present invention relates to bowling balls and, more particularly, to bowling ball structures and their manufacture.
  • bowling balls typically include an outer veneer and an inner core.
  • the outer veneer presents a polished wear resistant finish.
  • the inner core provide a mass of controlled specific gravity. It has been found that the composition of the core heretofore has lacked an ability to Withstand the continuing series of shocks to which the ball is subjected during play.
  • the core tends to separate from and to float within the veneer and the veneer tend-s to crack as a result of the lack of shock absorption by the core.
  • the present invention contemplates a novel bowling ball construction of the foregoing type having outstanding shock resistance by virtue of a novel core composition that retains its original volume and maintains its adherence to the veneer with unprecedented efiicacy.
  • Primary objects of the present invention are to provide novel structural designs and manufacturing processes for bowling balls of the foregoing type that are characterized by: a core composed of a polymerized matrix in which are dispersed discrete chips of certain relatively low specific gravity organic materials of high dimensional stability; a core composed of a polymerized matrix in which are dispersed minute gas filled cells of certain types; and a core composed of a polymerized matrix in which are dispersed chips and cells of the above types in combination. Best results are achieved when the chips are composed of wood or plastic foam and the cells are composed of a mixture of cork and, so-called, Microballoons.
  • FIG. 1 is a partly sectional, cutopen, perspective view of a bowling ball embodying the present invention.
  • FIG. 2 illustrates a sequence of steps to which selected materials are subjected in accordance with the process of the present invention.
  • the bowling ball illustrated and described herein as embodying the present invention comprises a veneer 10 and a core 12, into which have been drilled three finger holes 14.
  • the external periphery of the veneer which is ground and polished, is approximately 27 inches in circumference and the overall weight of the ball ranges from 9 to 12 pounds.
  • the core is a sphere and the veneer is a shell, both with the same geometrical center.
  • the core and the veneer may be positioned to have different geometrical centers or different centers of gravity.
  • the veneer is composed of vulcanized rubber.
  • the core is composed of a polymerized organic matrix, in which are dispersed cellular chips of macroscopic extent and gas filled cells of microscopic extent.
  • veneer 10 is a natural rubber such as cis-1,4-polyisoprene or a synthetic rubber such as butadiene-styrene, neoprene, butyl rubber, nitrile rubber, polysulfide rubber, chlorosulfonated polyethylene, polyurethane, cis-l,4 polybutadiene, synthetic cis-l,4 polyisoprene, adduct rubber and combinations thereof. Curing of these materials is effected at elevated temperatures by suitable chemical agents such as sulfur, selenium, tellurium, organic peroxide, nitro compounds, azo compounds and certain organic sulfur compounds such as the alkyl disulfides. Usually, the radial thickness of the veneer ranges from /2 to 1 /2 inch.
  • the macroscopic chips are composed of a natural cellulosic, cellular material such as wood or a synthetic solid foam having a solid external phase and a gaseous internal phase.
  • the foam in one form is a polyurethane foam such as polyurethane itself, which is prepared by reacting polyisocyanates, alkyd resins and water.
  • the foam, in another form, is prepared by curing any of a variety of polymerizates( e.g.
  • acrylics such as methyl methacrylate, amino resins such as urea formaldehyde, cellulosics such as cellulose propionate, polyurethanes such as polyurethane, polyamides such as polyhexamethylene adipamide, polyester resins such as those produced by the esterfication of polyhydric alcohols and polybasic acids, epoxy resins such as those produced by reacting epichlorohydrin with bis-phenol, ethylenes such as polyethylene, phenolics such as phenol formaldehyde, styrenes such as polystyrene and vinyls such as polyvinyl alcohol), in the presence of a blowing agent, for example, an azo containing compound that releases nitrogen when heated (cg.
  • a blowing agent for example, an azo containing compound that releases nitrogen when heated
  • the foam in another form is prepared by the mechanical mixing of any of the polymerizates mentioned above with a gas such as nitrogen, carbon dioxide or air.
  • a gas such as nitrogen, carbon dioxide or air.
  • the macroscopic chips in terms of of their total weight, range in maximum extent, between V and A1 of an inch.
  • the microscopic gas filled cells are: a natural material such as cork which is composed of cortical plant tissue in which dead cells are filled with air; or miniscule phenolic cells containing nitrogen of the type sold under the trademark Microballoons by Union Carbide Corporation.
  • Microballoons are formed by subdividing into droplets a solution containing a volatile solvent having dissolved therein film forming material and a material other than the volatile solvent which furnishes a material that remains gaseous at normal temperatures, and by heating the droplets to a temperature causing volatilization of the solvent to form a self-supporting, relatively gas-impervious particle wall coincident with particle formation and conversion of the gas furnishing material into a gas that remains gaseous at normal temperatures.
  • the film forming material is either polyvinyl alcohol or a phenol formaldehyde resin
  • the decomposable substance is dinitrosopentamethylene tetramine, ammonium nitrate, ammonium carbonate or ammonium bicarbonate
  • the particles have an approximate average diameter of 1 to 500 microns, an approximate density of from 0.01 to 0.3 and an approximate liquid displacement of from 3 0.5 to 0.6.
  • the preparation and composition of Microballoons is described in detail in U.S. Patent No. 2,797,- 201, issued on June 25, 1957, in the names of F. Veatch et al. for Process of Producing Hollow Particles and Resulting Product.
  • the polymerizable matrix of core 12 produces a somewhat resilient plastic.
  • This matrix for example, is a phenolic resin such as phenol formaldehyde, an epoxy resin such as that produced by reacting epichlorohydrin with bisphenol or a polyester resin such as that produced by the esten'fication of polyhydric alcohols and polybasic acids.
  • the composition used in the preferred process of FIG. 2 comprises by total weight the following: resin 25-75% incompressible chips to 75% and preferably 25 to 40%; cork 0 to 75% and preferably to 15%; and Microballoons 0 to 75% and preferably 5 to 15%.
  • this process comprises the steps of: curing a core mixture of the foregoing type at a temperature ranging from 150 to 400 F.
  • the core and veneer may be co-vulcanized, rather than cured in separate steps; the assemblage may be press cured or cured in open steam; instead of pics, other veneer shapes may be used, as a single-wrap sheet roughly in the form of a maltese cross; etc.
  • the resulting bowling ball structure is ground to its final size and drilled.
  • Example I The process of FIG. 2 was performed as follows: A spherical core was prepared by mixing the following, total weight: phenolic resin-100.00 parts; hexamethylene tetrarnine (as a cross-linking agent)9.77 parts; wood chips, averaging /2 inch in greatest extent and 90% by weight of the wood chips ranging in greatest extent from to of an inch-57.00 parts; cork- 42.40 parts; Microballoons0.00 parts; odorant-2.50 parts. The total number of parts in the core according to the foregoing was 211.67, weighing approximately 5 lbs. This core was placed in an 8% inch diameter mold and cured first for 2 hours at 230 F. and then for 5% hours at 300 F.
  • phenolic resin-100.00 parts hexamethylene tetrarnine (as a cross-linking agent)9.77 parts
  • wood chips averaging /2 inch in greatest extent and 90% by weight of the wood chips ranging in greatest extent from to of an inch-57.00 parts
  • the resulting core which weighed 4.50 lbs., was turned down to a 7% diameter sphere, which weighed 3.875 lbs.
  • the turned core was positioned within a pair of unvulcanized pies weighing 7.750 lbs. the total Weight of the core and the unvulcanized pies being 11.625 lbs.
  • the unvulcanized rubber overflowed in the amount of 0.190 lb.
  • the ball then weighing 11.438 lbs., its veneer was vulcanized under heat and pressure. Finally, the veneer was turned down to a diameter of 8.581 inches, at which time the ball Weighed 9.875 lbs. and was 5160 cc. in volume.
  • a bounce test was conducted with the foregoing ball such that the ball was repetitively dropped five feet to a concrete slab. The ball was dropped 199 times under these conditions before failure.
  • Example II The process of FIG. 2 was performed as follows: A spherical core was prepared by mixing the following by total weight: phenolic resin100.00 parts; hexamethylene tetramine (as a cross-linking agent)9.77 parts; wood chips, averaging /2 inch in greatest extent and 90% by weight of the wood chips ranging in greatest extent from & to of an inch57.00 parts; cork-0.00 parts; Microballoons42.40 parts; odorant2.50 parts. The total number of parts in the core according to the foregoing was 211.67, weighing approximately 5 lbs. This core was placed in an 8% inch diameter mold and cured first for 2 hours at 230 F. and then for 5% hours at300 F.
  • the resulting core which weighed 4.69 lbs., was turned down to a 7% diameter sphere, which weighed 4.19 lbs.
  • the turned core was positioned within a pair of unvulcanized pies weighing 7.750 lbs., the total weight of the core and the unvulcanized pies being 11.940 lbs.
  • the unvulcanized rubber overflowed in the amount of 1.940 lbs.
  • the ball then weighing 10.000 lbs., its veneer was vulcanized under heat and pressure. Finally, the veneer was turned down to a diameter of 8.580 inches, at which time the ball weighed 8.940 lbs. and was 5160 cc. in volume.
  • a bounce test was conducted with the foregoing ball such that the ball was repetitively dropped five feet to a concrete slab. The ball was dropped 178 times under these conditions before failure.
  • Example III The process of FIG. 2 was performed as follows.
  • a spherical core was prepared by mixing the following by total weight: phenolic resin100.00 parts; hexamethylene tetramine (as a cross-linking agent)9.77 parts; wood chips, averaging /2 inch in greatest extent and 90% by weight of the wood chips ranging in greatest extent from to of an inch57 .00 parts; cork-21.20 parts; Microballoons-21.20 parts; odorant2.50 parts.
  • the total number of parts in the core according to the foregoing was 211.67, weighing approximately 5 lbs. This core was placed in an 8% inch diameter mold and cured first for 2 hours at 230 F. and then for 5% hours at 300 F.
  • the resulting core which weighed 4.75 lbs., was turned down to a 7% diameter sphere, which weighed 4.25 lbs.
  • the turned core was positioned within a pair of unvulcanized pies weighing 7.750 lbs., the total weight of the core and the unvulcanized pies being 12.000 lbs.
  • the unvulcanized hard rubber overflowed in the amount of 1.500 lbs.
  • the ball then Weighing 11.438 lbs., its veneer was vulcanized under heat and pressure. Finally, the veneer was turned down to a diameter of 8.580 inches, at whichtime the ball weighed 9.250 lbs. and was 5160 cc. in volume.
  • a bounce test was conducted with the foregoing ball such that the ball was repetitively dropped five feet to a concrete slab. The ball was dropped 278 times under these conditions before failure.
  • Example IV Example III was repeated except that the wood chips and Microballoons were replaced by sawdust. The dimensions throughout the process were not determined. The ball here failed after a bounce test of 40 drops.
  • the present invention thus provides a new bowling ball structure and process giving rise to greatly increased impact resistance by virtue of a combination of macroscopic cellular organic chips and microscopic gas filled cells, dispersed in a polymeric matrix. Since certain changes may be made in the construction and process described in the foregoing specification and shown in the accompanying drawings, without departing from the scope of the present invention, it will be understood that all matter hereinabove shall be taken in an illustrative and not in a limiting sense.
  • a bowling ball comprising an external veneer and an internal core, said veneer being composed of an elastomeric material, said core including a polymerized resin matrix containing dispersed therein, a multiplicity of macroscopic organic chips and a multiplicity of micro scopic gas filled cells, said resin of said matrix constituting from 25 to of said core by total weight of said core,
  • the remainder of said core constituting at least one of said organic chips and microscopic gas filled cells in amounts ranging together from 5 to 15 by total Weight of said core and being suflicient to impart shock absorbency tending to prevent separation of said veneer from said core.
  • said core by total weight, is composed of from 25 to 75% resin, from to 75 organic chips, from 0 to 75% cork and from 0 to 75 phenolic spheres containing nitrogen, at least one of said organic chips and said phenolic spheres being present in substantial amounts.
  • said microscopic gas filled cells are constituted by cellular materials in an amount ranging from to 15% by total weight of said core and including cork and phenolic spheres containing nitrogen.
  • a bowling ball comprising an external veneer and an internal core, said veneer being composed of an olefinic elastomeric material, said core including a polymerized matrix containing dispersed therein a multiplicity of organic chips, of which 90% range from ,4 to of an inch in maximum extent, cork and microscopic hollow plastic cells containing gas, said core and said veneer being bonded together, said chips, said cork and said cells being in proportions ranging together from 5 to 15% by weight of said core, by which to absorb shock in order to prevent separation between said veneer and said core.
  • the bowling ball of claim 6 wherein said core by total weight is composed of from 25 to 75 resin, from 0 to 75% chips, from 5-15% cork and from 15 to 25% plastic spheres containing gas.
  • a bowling ball comprising an external veneer shell and an internal core, said shell being composed of an olefinic elastomeric material, said core including a polymerized resin matrix containing dispersed therein a multiplicity of cellular organic chips of which 90% range from to of an inch in maximum extent, cork and microscopic synthetic plastic spheres containing gas, said core by total weight being composed from 25 to 75% of said resin, from 25 to 40% of said chips, from 5 to 15% of said cork and from 5 to 15% of said synthetic plastic spheres.
  • a bowling ball comprising an external veneer shell and an internal core, said shell being composed of an olefinic elastomeric material, said core including a polymerized resin matrix containing dispersed therein a multiplicity of cellular organic chips of which range from 2, to /1 inch in maximum extent, cork and microscopic synthetic plastic spheres containing gas, said core by total weight being composed of from 25 to 75% of said resin, from 25 to 40% of said chips from 5 to 15 of said cork and from 5 to 15 of said synthetic plastic spheres, said synthetic plastic being phenolic, said gas being nitrogen, the radial thickness of said veneer shell ranging from A2 to 1% inch, said spheres having an approximate average diameter of 1 to 500 microns and an approximate density of from 0.01 to 0.3, said polymerized matrix being selected from the class consisting of phenolic, epoxy and polyester resilient plastics.
  • a process of fabricating a bowling ball comprising the steps of: mixing core materials including approxmiately parts of phenolic resin, approximately 10 parts of cross-linking agent, approximately 57 parts of wood chips, said wood chips averaging /2 inch in greatest extent and 90% by weight of said woodchips ranging in greatest extent from A to of an inch, approximately 21 parts of cork, approximately 21 parts of phenolic plastic spheres containing nitrogen, said spheres having an approximately average diameter of 1 to 500 microns and an approximate density of from 0.01 to 0.3, and approximately 2 parts of an odorant, said core materials weighting approximately 5 pounds; at least partially curing said core materials in a spherical mold, approxi mately 8% inches in diameter, at a temperature ranging from to 400 F. to produce a core; coating said core with a coat of unvulcanized rubber to provide a veneer; and completing the curing of said veneer and said core under heat and pressure to produce said bowling ball.

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  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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US142235A 1961-10-02 1961-10-02 Bowling ball structures and their manufacture Expired - Lifetime US3206201A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350252A (en) * 1964-05-11 1967-10-31 Stowe Woodward Inc Structure and manufacture of bowling balls
US3359355A (en) * 1964-01-20 1967-12-19 Jones Metal Products Company Apparatus and method for making plastic article
US3428315A (en) * 1964-07-09 1969-02-18 Dunlop Co Ltd Game ball
US3468538A (en) * 1965-12-06 1969-09-23 Kodiak Corp Weighted billiard cue
US3807733A (en) * 1971-01-25 1974-04-30 Phillips Petroleum Co Bowling ball
US4131277A (en) * 1977-11-14 1978-12-26 Randolph John L Bowling ball
US4212461A (en) * 1978-07-10 1980-07-15 Fansteel Inc. Composite high strength to weight structure having shell and weight controlled core
US4328967A (en) * 1979-12-26 1982-05-11 Columbia Industries, Inc. Lightweight bowling ball
US4461478A (en) * 1982-06-14 1984-07-24 Ebonite International, Inc. Bowling ball and method of manufacture
US4522397A (en) * 1979-12-26 1985-06-11 Columbia Industries, Inc. Filled shell bowling ball
US4643424A (en) * 1984-01-18 1987-02-17 Keiji Nakajima Ball for ballgames and manufacturing process thereof
US5433438A (en) * 1992-06-30 1995-07-18 Marty Gilman, Inc. Ball for play, therapy and sports training and method of manufacture
WO2018087428A1 (en) * 2016-11-08 2018-05-17 Woodio Oy Compressed articles and methods of manufacturing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3641880A1 (de) * 1986-12-08 1988-06-16 Hans Kloos Kegel- oder bowlingkugel

Citations (4)

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Publication number Priority date Publication date Assignee Title
US1504461A (en) * 1922-02-20 1924-08-12 Brunswickbalke Collender Compa Bowling ball
US2362269A (en) * 1942-05-06 1944-11-07 Horace W Hall Bowling ball or the like
US2797201A (en) * 1953-05-11 1957-06-25 Standard Oil Co Process of producing hollow particles and resulting product
US2944821A (en) * 1957-11-20 1960-07-12 Modern Plastics Res And Sales Plastic articles of controlled specific gravity having a wear-resistant outer surface and method of preparing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1504461A (en) * 1922-02-20 1924-08-12 Brunswickbalke Collender Compa Bowling ball
US2362269A (en) * 1942-05-06 1944-11-07 Horace W Hall Bowling ball or the like
US2797201A (en) * 1953-05-11 1957-06-25 Standard Oil Co Process of producing hollow particles and resulting product
US2944821A (en) * 1957-11-20 1960-07-12 Modern Plastics Res And Sales Plastic articles of controlled specific gravity having a wear-resistant outer surface and method of preparing the same

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359355A (en) * 1964-01-20 1967-12-19 Jones Metal Products Company Apparatus and method for making plastic article
US3350252A (en) * 1964-05-11 1967-10-31 Stowe Woodward Inc Structure and manufacture of bowling balls
US3428315A (en) * 1964-07-09 1969-02-18 Dunlop Co Ltd Game ball
US3468538A (en) * 1965-12-06 1969-09-23 Kodiak Corp Weighted billiard cue
US3807733A (en) * 1971-01-25 1974-04-30 Phillips Petroleum Co Bowling ball
US4131277A (en) * 1977-11-14 1978-12-26 Randolph John L Bowling ball
US4212461A (en) * 1978-07-10 1980-07-15 Fansteel Inc. Composite high strength to weight structure having shell and weight controlled core
US4522397A (en) * 1979-12-26 1985-06-11 Columbia Industries, Inc. Filled shell bowling ball
US4328967A (en) * 1979-12-26 1982-05-11 Columbia Industries, Inc. Lightweight bowling ball
US4461478A (en) * 1982-06-14 1984-07-24 Ebonite International, Inc. Bowling ball and method of manufacture
US4643424A (en) * 1984-01-18 1987-02-17 Keiji Nakajima Ball for ballgames and manufacturing process thereof
US5433438A (en) * 1992-06-30 1995-07-18 Marty Gilman, Inc. Ball for play, therapy and sports training and method of manufacture
WO2018087428A1 (en) * 2016-11-08 2018-05-17 Woodio Oy Compressed articles and methods of manufacturing the same
CN110167728A (zh) * 2016-11-08 2019-08-23 伍迪欧公司 压缩制品及其制造方法
JP2019534193A (ja) * 2016-11-08 2019-11-28 ウーディオ オサケユキチュアＷｏｏｄｉｏ Ｏｙ 圧縮物品、およびその製造方法
US11383404B2 (en) 2016-11-08 2022-07-12 Woodio Oy Compressed articles and methods of manufacturing the same
JP7153357B2 (ja) 2016-11-08 2022-10-14 ウーディオ オサケユキチュア 圧縮物品、およびその製造方法
AU2017357597B2 (en) * 2016-11-08 2023-01-19 Woodio Oy Compressed articles and methods of manufacturing the same

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