Apparatus for folding panels of carton blank
AssigneeUnion Camp Corporation
InventorJohn M. Mitchard
Life of this patent
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Abstract
Apparatus for folding the panels of a bulk box blank into a tube. Such apparatus is particularly suited to fold the panels of extremely large heavy-weight blanks which are resistant to folding and therefore difficult to fold manually. The apparatus includes a vacuum hold down unit to hold and register the blank in position, folding arm assemblies to successively fold down the outer panels of the blank into a tube, and a hold-down device to restrain the folded panels from springing upward as the folded blank is moved into a compression unit.
Claims9
Apparatus for folding a bulk box blank scored to define side panels in which the opposite ends of the blank will be brought together to form a flat tube comprising:
- a folding table;
- means to feed the box blank onto the said table into a predetermined position;
- means to retain the said blank in such predetermined position;
- means to successively fold the panels at each end of the blank toward each other to bring the outer ends of such panels together for joining to form a tube comprising an upstream arm rotatable approximately 180.degree. to fold the one said panel at one end and a downstream arm rotatable more than 90.degree. to fold the other said panel at the opposite end;
- a hold-down device adapted to apply pressure to the top of the folded blank and restrain the folded blank in flat condition;
- and
- means to feed the folded blank from beneath the hold-down device.
Dependencies are inferred from the claim text.