Machine for forming cardboard boxes from blanks folded flat
First Claim
1. A carton erecting machine comprising:
- a support frame;
a magazine for containing a vertical stack of flattened carton blanks;
means for picking up the lowest blank of the stack and putting it vertical in a pre-opening position;
carton opening means including first and second grasping means relatively movable from a carton grasping position, in which said first and second grasping means are arranged in parallel vertical planes and engageable with opposite portions of the blank in the pre-opening position which correspond to a first pair of opposite walls of the desired erected carton, to a carton opening position in which said first and second grasping means are arranged in parallel spaced vertical planes to keep the carton in open position;
means for closing a first pair of lower carton flaps depending from a second pair of opposite walls of the erected carton during movement of said grasping means to said carton opening position;
means for closing a second pair of lower carton flaps depending from said first pair of opposite side walls of the erected carton after the end of movement of said grasping means; and
carton ejecting means for finally moving the erected carton perpendicularly to said second pair of side walls to a carton delivering position.
1 Assignment
0 Petitions
Accused Products
Abstract
A machine is provided for forming three-dimensional cardboard boxes starting from a blank folded flat. The machine has a supporting frame which includes a magazine containing many flat blanks for taking one blank at a time from the magazine. The machine is capable of opening the blank, closing the lower smaller flaps of the blank, closing the lower larger flaps, and ejecting a formed box. The lower smaller flaps are closed virtually simultaneously with the opening of the blank in such a manner so as to prevent interference by the smaller flaps with the adjacent larger flaps and thus facilitate closing of the smaller flaps. The opening mechanism rotates around pins, each located at a corner of a box to be formed. At least one of the rotation pins is adjustable in position. Retractable suction cup members make up the opening mechanism.
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Citations
10 Claims
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1. A carton erecting machine comprising:
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a support frame; a magazine for containing a vertical stack of flattened carton blanks; means for picking up the lowest blank of the stack and putting it vertical in a pre-opening position; carton opening means including first and second grasping means relatively movable from a carton grasping position, in which said first and second grasping means are arranged in parallel vertical planes and engageable with opposite portions of the blank in the pre-opening position which correspond to a first pair of opposite walls of the desired erected carton, to a carton opening position in which said first and second grasping means are arranged in parallel spaced vertical planes to keep the carton in open position; means for closing a first pair of lower carton flaps depending from a second pair of opposite walls of the erected carton during movement of said grasping means to said carton opening position; means for closing a second pair of lower carton flaps depending from said first pair of opposite side walls of the erected carton after the end of movement of said grasping means; and carton ejecting means for finally moving the erected carton perpendicularly to said second pair of side walls to a carton delivering position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification