Manufacturing container or tube from paper; or other manufacturi – Container or tube erecting – opening – or collapsing
Patent
1986-03-24
1987-07-07
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Container or tube erecting, opening, or collapsing
493319, 493409, B31B 178
Patent
active
046784560
ABSTRACT:
A carton unfolding machine reliably unfolds folded carton blanks. The blanks are continuously propelled horizontally by stripper fingers along a first support with the flaps extending transversely to the direction of motion. Blocks in the path of the flaps raise the trailing flaps slightly relative to the plane of the blank sides and leading flaps. The blanks pass spring plates that enter slits between the trailing and leading upper flaps to support the trailing upper flaps. The first support terminates under the spring plates, so that the blank is supported only at the trailing upper flaps by the spring plates and by the stripper fingers. The unsupported blank leading edge tips due to gravity, thus slightly unfolding the blank. Continued motion by the stripper fingers pushes the blank out of contact with the second support, and the leading edge falls to a carrier. The stripper fingers continues to push the sloped and partially opened blank against the slower moving carrier, thereby completely unfolding the blank.
REFERENCES:
patent: 2750856 (1956-06-01), Ferguson et al.
patent: 2906392 (1959-09-01), Galloway
patent: 2947229 (1960-08-01), Caresio
patent: 3040034 (1962-06-01), Galloway
patent: 3122071 (1964-02-01), Vogel
patent: 3174259 (1965-03-01), Jones et al.
patent: 4057008 (1977-11-01), Hughes
Schmidt Frederick R.
Terrell William E.
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