Method of making a games racket

Details Method of making a games racket Method of making a games racket

1987-06-03

1989-10-17

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264156, 264257, 264317, 264278, 264279, 273 73C, B29C 3312, B29C 4536

Patent

active

048745707

ABSTRACT:
The invention relates to hollow frames for games rackets e.g. for squash and badminton, which are in the form of hollow injection moldings of thermoplastics material and to a method of making such frames involving injecting the thermoplastics material around a fusible core that can be subsequently melted out. For rackets such as for squash and badminton with relatively long thin shafts undesirable displacement of the shaft portion (22) of the core under molding pressure is achieved by use of locating means (24A,25A) that form holes that do not weaken the eventual shaft (23). The means are positioned to correspond to the neutral surface of the shaft and such that the greatest unclamped length of shaft core between supports divided by the depth of the shaft core is less than 10.

REFERENCES:
patent: 3840626 (1974-10-01), Laskawy
patent: 3882220 (1975-05-01), Ryder
patent: 4000877 (1977-01-01), Shead et al.
patent: 4195046 (1980-03-01), Kesling
patent: 4291574 (1981-09-01), Frolow
patent: 4297308 (1981-10-01), Popplewell
patent: 4460423 (1984-07-01), Bosnia
patent: 4470786 (1984-09-01), Sano
patent: 4614627 (1986-09-01), Curtis et al.

Affiliated with

Also associated with

Rating

Method of making a games racket does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making a games racket, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a games racket will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1742423