METHOD AND APPARATUS FOR MANUFACTURING GRATING
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United States of America Patent
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Issued Date -
May 6, 2010
app pub date -
Apr 24, 2008
filing date -
Apr 27, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention provides a method of manufacturing a grating. The method of the present invention includes fitting a plastic deformable lateral member (2) having a hollow pipe shape into coupling holes (10) formed through respective longitudinal members (4) in a lateral direction of the longitudinal members; holding the lateral member and the longitudinal members; and passing a forming weight (12) through the lateral member (2) from a first end of the lateral member to a second end thereof using a relatively large external force. Here, the forming weight has a predetermined size suitable for passing through the lateral member to expand the cross-sectional area of the lateral member such that the lateral member is plastic-deformed.
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