1977-05-04
1979-04-17
Lake, Roy
53230, 93 51R, B31B 146
Patent
active
041494520
ABSTRACT:
An automatic machine and method of operation for erecting a flat blank to form a completely folded container. The machine has a blank feed mechanism that stores flat blanks and transfers individual blanks using pressure-aided means to an infeed opening in the machine. A pressure-assisted receiver vertically movable within the machine ascends to engage the blank present at the in-feed opening and then draws the blank, including any articles to be packaged loaded during a pause at the infeed opening, downwardly into the machine past a series of folding members to partially erect the blank into a tray-like container. The container is now advanced in a horizontal direction along guide means and past another arrangement of folding members to further fold the blank to form a semi-erected container. An elevator positioned to receive the processed blank from the guide means raises the semi-erected container into a compression chamber to complete final folding operations. Discharge means eject the completed container through an output opening in the machine.
To form a sealed container, pressure-supplied glue applicators are positioned at an acute angle adjacent the guide means so as to apply glue to all blank surfaces requiring glue during the horizontal traversal of the partially-erected container along the guide means. During a first activity, pressure is supplied to the applicators so that glue at a first volume per unit length is applied to the side flaps. During a second activity, the pressure is increased so that the volume of glue per unit length applied to the front panel is substantially the same as the first volume.
REFERENCES:
patent: 3127027 (1964-03-01), Roser et al.
patent: 3318205 (1967-05-01), Lefief
patent: 3531914 (1970-10-01), Franklin
patent: 3665675 (1972-05-01), Johnson
patent: 3771282 (1973-11-01), Flanagan
Bell Paul A.
Lake Roy
Pugh Martha G.
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