Method of and apparatus for producing baseball bats

Details Method of and apparatus for producing baseball bats Method of and apparatus for producing baseball bats

1976-05-19

1977-08-02

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72 84, 72367, B21B 1912, B21D 5116

Patent

active

040388506

ABSTRACT:
The present invention enables the efficient production of integral baseball bats made of metal tubing by use of a unique process utilizing a forming machine without welding or joining individually processed portions, this process comprising substantially the following major steps:
The step of rotationally forming the body portion by pressing a plurality of spinning rollers of three or more in number synchronously on the tubing with a pre-formed mandrel inserted therein;
The step of rotationally forming the grip portion by urging another plurality of rollers against the tubing at the rear portion thereof after retracting the tailstock; and
The step of rotationally forming the other end portion of the tubing which is re-chucked after an interruption of working followed by a turn-over of the tubing which has been removed from the mandrel.

REFERENCES:
patent: 557791 (1896-04-01), Findlay
patent: 1499128 (1924-06-01), Shroyer

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