Apparatus for making a locking join for boxes

Details Apparatus for making a locking join for boxes Apparatus for making a locking join for boxes

1993-07-27

1995-05-16

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493390, B31B 360, B31B 1768

Patent

active

054156130

ABSTRACT:
A non-releasable mechanical join useful for permanent joins of plastics material cartons is formed by a row of a plurality of engagement tabs interlocked in a complementary row of slots. The engagement tabs have heads able to passthrough the slots in one direction but unable to return in the other direction. The tab heads may be formed as arrowheads, the barbs of which act against edges of the slots to disallow withdrawal. Suitably, the leading edges of the slots ar convexly arcuate towards the approaching arrowheads. This may help to provide secure engagement. The greater the number oftabs and slots, the greater may be be the permanence of the join.

REFERENCES:
patent: 2864287 (1958-12-01), Johnson et al.
patent: 2867157 (1959-01-01), Moore
patent: 3953634 (1976-04-01), Wooten
patent: 4062270 (1977-12-01), Culpepper
patent: 4708284 (1987-11-01), Sutherland et al.
patent: 5177932 (1993-01-01), Schmetzer

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