Special receptacle or package – Structural features for vertical stacking – i.e. – similar... – Having specified means for nesting instead of stacking
Patent
1979-05-31
1982-02-23
Lowrance, George E.
Special receptacle or package
Structural features for vertical stacking, i.e., similar...
Having specified means for nesting instead of stacking
206518, B65D 2104
Patent
active
043165400
ABSTRACT:
Pairs of complementary open-top containers are disclosed that can be stacked, one upon the other without covers or reorientation of one of the pair relative to the other. Similarly formed containers of multiple pairs can be nested for storage or transportation as empties. A pair of complementary containers are of similar polygonal shape in which the sidewalls are formed as complementary approximations of sine waves (sinusoids) having similar amplitudes, but whose frequencies are spacially displaced sufficiently so that interference is created between the ingoing and outgoing portions of a sufficient number of half waves forming the wave train so that the bottom portions of such waves on one container land on the top of oppositely phased waves on the complementary container. In use of multiple sets of pairs similarly formed containers are identically marked or coded so that a workman (or automatic handling equipment) can readily identify whether a particular container will stack with another container of the pair, or nest with a similarly formed container. In preferred embodiments, square boxes and approximately circular pails illustrate the invention.
REFERENCES:
patent: 2742181 (1956-04-01), Jarund
patent: 2889072 (1959-06-01), Lapham
patent: 3191796 (1965-06-01), Schwartz
patent: 3438544 (1969-04-01), Cloyd
patent: 3773213 (1973-11-01), Frederick
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