Blanks for forming hollow objects with symetrically placed conic

Stock material or miscellaneous articles – Article of intermediate shape

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428 9, 428 341, 428174, 428187, 428195, 446488, 493356, 493405, B29B 700, A63H 3300, B31B 114

Patent

active

060278196

ABSTRACT:
A blank of foldable sheet material for assembling a hollow figure having inwardly directed conical depressions comprises a sheet of foldable material having the shape of a square or rectangle, without interior cuts or exterior tabs scored or marked for scoring in four areas along circular lines tangential to each other and having a radius of one fourth the diagonal of the sheet if a square and one half the narrower side if a rectangle. The blanks have each of the circularly scored areas formed by rolling into a conical shape comprising from about four-ninths to two-thirds of a cone. Six of the blanks assemble into a self-supporting interlocking hollow figure having eight inward-facing cones. If desired, the visible surfaces of the hollow object may have a decorative or informative imprint or coating thereon.

REFERENCES:
patent: 3042562 (1962-07-01), Peterson
patent: 3302321 (1967-02-01), Walker
patent: 3730818 (1973-05-01), Salinari
patent: 4001964 (1977-01-01), Hooker
patent: 4517251 (1985-05-01), Mosely

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