The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1982
Filed:
Aug. 12, 1980
Frank W Popplewell, Saffron Walden, GB;
Dunlop Limited, London, GB;
Abstract
A method of making a games racket frame by injecting thermoplastics material into the space (13) between a fusible core (14) and a mould at a temperature above the melting point of the core. The core (14) is shaped to have locating lugs (15) to abut against the internal walls of the mould and hold the core in the desired position. The moulding is allowed to set and the core then melted out by raising the temperature sufficiently for that purpose but insufficiently to deform the moulding. The lugs (15) enable the core (14) to be located in the desired position in the mould and to resist displacement from that location during injection. The holes formed in the wall of the frame because of the abutment of lugs and mould wall can conveniently be utilized as stringing holes.