Horizontally supported planar surfaces – With structural installation – Body related
Patent
1991-08-16
1992-07-07
Chen, Jose V.
Horizontally supported planar surfaces
With structural installation
Body related
108 42, A47B 2300
Patent
active
051273390
ABSTRACT:
A foldable lap tray is formed from a unitary blank of semi-rigid sheet material, such as corrugated cardboard. The blank is cut and scored so that it can be bent along the score lines into a configuration having a top portion, side portions extending downwardly from each of two opposed sides of the top portion, and a pair of bottom portions, each extending from one of the side portions toward the other side portion. When the top portion is located on the lap of a seated person, the bottom portions can be extended underneath the thighs of the seated person to lend stability to the tray. The bottom portions terminate in clasping elements for removably interlocking the bottom portions together. The side portions are each divided by a lateral score line into upper and lower side portions that can be bent relative to each other to vary the separation between the top portion and the bottom portions. The top portion is provided with a plurality of flaps that can be bent upwardly out of the plane of the top portion so as to be substantially vertical. The vertically-oriented flaps block objects from rolling or sliding off of the tray surface formed by the top portion.
REFERENCES:
patent: 2459921 (1949-01-01), Comer
patent: 2512963 (1950-06-01), Peiker
patent: 2670124 (1954-02-01), Buchmiller et al.
patent: 2695712 (1954-11-01), Kolander
patent: 2808191 (1957-10-01), Cramer
patent: 2916181 (1959-12-01), Pfister et al.
patent: 3326445 (1967-06-01), Goings
patent: 4819568 (1989-04-01), Coffrin
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