Title: Process of manufacturing tennis racket frames or the like

Abstract: A process for manufacturing tennis racket frames including lining the contoured mold cavities of a mold with layers of predetermined oriented plastic strip material, encompassing elastic inflatable tubes in said mold cavities with superimposed layers or applications of unidirectionally and diagonally oriented prepreg material, positioning the tubes in the mold halves, inserting a hard foam member in the mold cavities in space bounded by each of the tubes, folding the first layers of prepreg material over the hard foam member, closing the mold halves, and polymerizing the prepreg material layers under heat and pressure so as to form a molded tennis racket frame.

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Inventors: Kicherer, Karl Heinz (Nurtingen, DT)

Application Number: 550131
Filing Date: 1975-02-14
Publication_date: 1976-01-06
Assignee: Modicus Karl-Heinz Kicherer (Nurtingen, Wurttemberg, DT)
Primary Class(es): 156/156 156/191, 156/194, 156/228, 473/547
Other Classes:
US Patent Ref:

2593714	Apr, 1952	Robinson	156/156.
2878020	Mar, 1959	Robinson	273/73.
3256125	Jun, 1966	Tyler	156/228.
3755037	Aug, 1973	Erwin et al.	273/73.

Other Refs: 848,8261,122,8952,130,663

Aug, 1970	CA
Aug, 1968	UK
Feb, 1972	DT

Primary Examiner: Drummond, Douglas J.
Assistant Examiner: Simmons, David A.
Attorney: Haseltine, Lake & Waters