07152450 is referenced by 15 patents and cites 63 patents.

A method of preparing a sheet of material for bending along a bend line comprising the step of forming of at least one displacement in the thickness direction of the sheet of material with a portion of the periphery of the displacement closest to the bend line providing an edge and opposed face configured in position to produce edge-to-face engagement of the sheet on opposite sides of the periphery during bending. The forming step is preferably accomplished using one of a stamping process, a punching process, a roll-forming process and an embossing process. A sheet of material suitable for bending using the process also is disclosed, as are the use of coatings, shin guards and displacing the area of the sheet between bending inducing slits.

Title
Method for forming sheet material with bend controlling displacements
Application Number
10/795077
Publication Number
7152450 (B2)
Application Date
March 3, 2004
Publication Date
December 26, 2006
Inventor
Philip M Arnold
Redwood City
CA, US
Max W Durney
San Francisco
CA, US
Agent
Dorsey & Whitney
Assignee
Industrial Origami
CA, US
IPC
B21D 28/00
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