GB2015886A - Games Rackets - Google Patents

Games Rackets

Info

Publication number
GB2015886A
GB2015886A GB7906533A GB7906533A GB2015886A GB 2015886 A GB2015886 A GB 2015886A GB 7906533 A GB7906533 A GB 7906533A GB 7906533 A GB7906533 A GB 7906533A GB 2015886 A GB2015886 A GB 2015886A
Authority
GB
United Kingdom
Prior art keywords
moulding
support means
hollow
reinforced
injection moulding
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.)
Granted
Application number
GB7906533A
Other versions
GB2015886B (en
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 Ltd
Original Assignee
Dunlop Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dunlop Ltd filed Critical Dunlop Ltd
Priority to GB7906533A priority Critical patent/GB2015886B/en
Priority to IT20763/79A priority patent/IT1202902B/en
Publication of GB2015886A publication Critical patent/GB2015886A/en
Application granted granted Critical
Publication of GB2015886B publication Critical patent/GB2015886B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • A63B2049/103—Frames made of non-metallic materials, other than wood string holes produced during moulding process
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/026—Ratio fibres-total material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • A63B49/11—Frames made of non-metallic materials, other than wood with inflatable tubes, e.g. inflatable during fabrication
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
    • 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
    • B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
    • B29L2031/5245—Rackets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to games racket frames which are made from reinforced plastics material and have a hollow construction. The invention enables a satisfactory hollow product to be made by injection moulding instead of the more laborious technique of building a suitable reinforced hollow construction around a mandrel. The frame is a hollow injection moulding of reinforced thermoplastics material in which the walls (21A and 21B) at the outer and inner circumference of the head (21) (Figure 4 not shown) are joined by support means (25) through which the stringing holes (23) pass. The support means are integrally formed during the moulding. The method of the invention involves the use of a fusible core (10) (Figure 1 not shown) which is shaped to provide the desired moulding with support means and which is melted out after the moulding is formed. <IMAGE>
GB7906533A 1978-03-07 1979-02-23 Games rackets Expired GB2015886B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7906533A GB2015886B (en) 1978-03-07 1979-02-23 Games rackets
IT20763/79A IT1202902B (en) 1978-03-07 1979-03-06 RACKETS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB892578 1978-03-07
GB7906533A GB2015886B (en) 1978-03-07 1979-02-23 Games rackets

Publications (2)

Publication Number Publication Date
GB2015886A true GB2015886A (en) 1979-09-19
GB2015886B GB2015886B (en) 1982-05-12

Family

ID=26242507

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7906533A Expired GB2015886B (en) 1978-03-07 1979-02-23 Games rackets

Country Status (2)

Country Link
GB (1) GB2015886B (en)
IT (1) IT1202902B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131939A1 (en) * 1980-08-12 1982-06-09 Dunlop Ltd., London Frame for game rackets
EP0168992A2 (en) * 1984-07-17 1986-01-22 Dunlop Limited Games racket
EP0168993A2 (en) * 1984-07-17 1986-01-22 Dunlop Limited Games racket
EP0188127A2 (en) * 1985-01-16 1986-07-23 Dunlop Limited Games racket
EP0260915A2 (en) * 1986-09-17 1988-03-23 Diversified Products Corporation Racquets
EP0283169A2 (en) * 1987-03-17 1988-09-21 Dunlop Limited Games racket
AU581301B2 (en) * 1985-04-04 1989-02-16 Dunlop Limited Method of making striking implements
EP0374123A2 (en) * 1988-12-15 1990-06-20 Head Sport Aktiengesellschaft Method of manufacturing a ball game racket frame
EP0441249A1 (en) * 1990-02-05 1991-08-14 Takeda Chemical Industries, Ltd. A racket frame and production thereof

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131939A1 (en) * 1980-08-12 1982-06-09 Dunlop Ltd., London Frame for game rackets
AU579162B2 (en) * 1984-07-17 1988-11-17 Dunlop Limited Games racket
US4747598A (en) * 1984-07-17 1988-05-31 Dunlop Limited A British Company Racket frame having interiorly located stringing lugs
EP0168992A2 (en) * 1984-07-17 1986-01-22 Dunlop Limited Games racket
EP0168993A3 (en) * 1984-07-17 1986-10-01 Dunlop Limited Games racket
EP0168992A3 (en) * 1984-07-17 1986-10-08 Dunlop Limited Games racket
EP0168993A2 (en) * 1984-07-17 1986-01-22 Dunlop Limited Games racket
AU579382B2 (en) * 1984-07-17 1988-11-24 Dunlop Limited Games racket
EP0188127A2 (en) * 1985-01-16 1986-07-23 Dunlop Limited Games racket
AU586453B2 (en) * 1985-01-16 1989-07-13 Dunlop Limited Games racket
EP0188127A3 (en) * 1985-01-16 1987-04-08 Dunlop Limited Games racket
AU581301B2 (en) * 1985-04-04 1989-02-16 Dunlop Limited Method of making striking implements
EP0260915A3 (en) * 1986-09-17 1990-05-16 Diversified Products Corporation Racquets
US4981639A (en) * 1986-09-17 1991-01-01 Diversified Products Corporation Method of moulding racquets with stringing holes
EP0260915A2 (en) * 1986-09-17 1988-03-23 Diversified Products Corporation Racquets
EP0283169A3 (en) * 1987-03-17 1989-09-13 Dunlop Limited Games racket
EP0283169A2 (en) * 1987-03-17 1988-09-21 Dunlop Limited Games racket
EP0374123A2 (en) * 1988-12-15 1990-06-20 Head Sport Aktiengesellschaft Method of manufacturing a ball game racket frame
EP0374123A3 (en) * 1988-12-15 1991-05-29 Head Sport Aktiengesellschaft Method of manufacturing a ball game racket frame
EP0441249A1 (en) * 1990-02-05 1991-08-14 Takeda Chemical Industries, Ltd. A racket frame and production thereof

Also Published As

Publication number Publication date
GB2015886B (en) 1982-05-12
IT1202902B (en) 1989-02-15
IT7920763A0 (en) 1979-03-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950223