Precision-folded, high strength, fatigue-resistant structures and sheet therefor

a technology of high strength and high strength, applied in the direction of girders, envelopes/bags making machinery, paper/cardboard containers, etc., can solve the problems of accumulation of tolerance errors, difficult control of bend locations, and significant cumulative tolerance errors in bending
US20090297740A1Inactive Publication Date: 2009-12-03IND ORIGAMI INC CA US
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
IND ORIGAMI INC CA US
Publication Date
2009-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

Precision-folded, high strength, fatigue-resistant structures and a sheet therefore are disclosed. To form the structures, methods for precision bending of a sheet of material along a bend line and a sheet of material formed with bending strap-defining structures, such as slits or grooves, are disclosed. Methods include steps of designing and then separately forming longitudinally extending slits or grooves through the sheet of material in axially spaced relation to produce precise bending of the sheet when bent along the bend line. The bending straps have a configuration and orientation which increases their strength and fatigue resistance, and most preferably slits or arcs are used which causes edges to be engaged and supported on faces of the sheet material on opposite sides of the slits or arcs. The edge-to-face contact produces bending along a virtual fulcrum position in superimposed relation to the bend line. Several slit embodiments suitable for producing edge-to-face engagement support and precise bending are disclosed. With these teachings, forming numerous three-dimensional load-bearing structures from a two dimensional sheet are enabled. Examples of straight and curved beams, chassis, and exoskeletons are disclosed.
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Description

CROSS-REFERENCES TO RELATED APPLICATIONS

[0001] This application is a Continuation of U.S. patent application Ser. No. 11 / 384,216 filed Mar. 16, 2006, which claims the benefit of U.S. Provisional Application No. 60 / 663,392 filed Mar. 17, 2005, and the '216 application is a Continuation-in-Part of U.S. patent application Ser. No. 10 / 672,766 filed Sep. 26, 2003 and now U.S. Pat. No. 7,152,449 B2, which is a Continuation-in-Part of U.S. patent application Ser. No. 10 / 256,870 filed Sep. 26, 2002 and now U.S. Pat. No. 6,877,349 B2, which is a Continuation-in-Part of U.S. patent application Ser. No. 09 / 640,267 filed Aug. 17, 2000 and now U.S. Pat. No. 6,481,259 B1. All the above applications are incorporated herein for all purposes by reference in their entirety.BACKGROUND OF THE INVENTION

[0002] 1. Technical Field

[0003] The present invention relates, in general, to the designing and precision folding of sheets of material and the manufacture of structures therefrom. More particularly, the pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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