US 4,364,549 AGranted

Apparatus for feeding cardboard blanks or the like to a magazine

AssigneeHauni-Werke Korber & Co. KG

InventorsWerner Komossa, Nils von Wichert

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Abstract

Apparatus for supplying preselected numbers of superimposed prefabricated cardboard blanks of the type having alternating larger and smaller marginal flaps from an auxiliary magazine into the main magazine of a packing machine has a frame which carries the auxiliary magazine above the main magazine and is provided with several lugs which support the larger flaps of the lowermost blank in the auxiliary magazine. A photoelectronic detector monitors the height of the supply of blanks in the main magazine and transmits a signal when the height of the supply drops below a preselected value. This initiates pivotal movement of a pusher which is adjacent to one side of the pile of blanks in the auxiliary magazine whereby the pusher shifts a number of lowermost blanks relative to the lugs so that the lugs register with and can be bypassed by the shorter flaps of the thus released blanks which descend into the main magazine by gravity. The movements of the pusher are synchronized with the movements of an intercepting plate which is adjacent to a side of the pile of blanks in the auxiliary magazine opposite the pusher and serves to realign those blanks in the auxiliary magazine which might have become misoriented in response to shifting of the blanks therebelow by the pusher. This ensures that all blanks in the auxiliary magazine are in accurate register with each other at the time the pusher is about to pivot in a direction to release a selected number of blanks for gravitational descent into the main magazine.

Apparatus for supplying blanks of the type having marginal flaps alternating with recesses into the main magazine of a packing machine or the like, comprising an auxiliary magazine located above the main magazine and arranged to store a substantially upright pile of overlapping blanks each having oppositely opposed first and second sides;

a plurality of supports located below the lowermost blank of the pile in said auxiliary magazine and normally disposed below the marginal flaps of such lowermost blank to thereby hold the pile against gravitational descent into the main magazine therebelow;
displacing means operable to effect a relative movement between the pile in said auxiliary magazine and said supports so as to place the supports into register with the recesses of the pile whereby at least some blanks of the pile are free to descend into the main magazine by gravity, said displacing means including pusher means adjacent to one of the sides of said blanks, said pusher means arranged to move at least some blanks at the lower end of the pile in said auxiliary magazine between a first position in which the lowermost blank of the pile rests on said supports and a second position in which said supports register with the recesses of said some blanks;
intercepting means adjacent to the other side of the pile in said auxiliary magazine and arranged to prevent movement of those blanks of the pile not displaced by said pusher means;
and means for coupling said intercepting means for movement with said pusher means so as to enable said intercepting means to move away from said other side of the pile when said pusher means shifts a number of blanks to move the recesses of such blanks into register with said supports and to move toward said other side of the pile when said pusher means thereupon reassumes a predetermined starting position in which it allows the lowermost blank of the remainder of the pile in said auxiliary magazine to rest its flaps on said supports.

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Abstract

Claims12