Method of and apparatus for shaping the corners of stacked sheet material
AssigneeKolbus GmbH & Co. KG
InventorHorst Rathert
Life of this patent
Estimating the term…
Abstract
The corners of stacked sheet material, for example overlay material being employed in the formation of book covers, are simultaneously removed by a cutting appliance having plural knives. Stacks of the sheets of overlay material are delivered to the cutting appliance by carriers which move along a continuous path and, after the cutting operation, the carriers deliver the sheet material to the feed station of a downstream processing machine.
Claims21
Apparatus for shaping unbound individual sheets of material which have been assembled into a stack, the shaped sheets subsequently being withdrawn form the stack at a downstream feed station for further processing, sand apparatus comprising:
- corner-cutting means, said cutting means being provided with a plurality of knives which will be simultaneously brought into operational contact with the corners of a stack of sheets of material, said cutting means further including movable hold-down means which engage the top of a stack of sheets during the shaping thereof;
- and
- stack carrier means, said carrier means including guide members which define a magazine for receiving a stack of sheets to be shaped, said carrier means also having a stack support surface which defines a plane, said carrier means being movable between a stack loading position and a position under said cutting means, relative movement between said knives and a stack of sheets in a direction which is angularly oriented relative to said plane when said carrier means is positioned in said cutting means resulting in establishment of engagement between said knives and the stack and the progressive removal of corners from the sheets comprising the stack, said carrier means further being movable from the position in said cutting means to said feed station.
A method for shaping sheets of material which have been formed into a stack, the sheets initially having a generally rectangular shape and being withdrawn from the stack after shaping for further processing, said method comprising the steps of:
- exerting a compressive force on the stack of sheets;
- and
- imparting reciprocating movement along curved paths which intersect the corners of the stack of sheets to a plurality of knives, each knife having a generally straight cutting edge and being associated with a single corner for the stacked sheets;
- bringing the moving knives simultaneously into operational contact with the corners of the stack of held-down sheets to remove the corners therefrom, the knives executing a cutting action which begins a the edges of the sheets and extends along a cutting line towards the mid-point thereof.
Dependencies are inferred from the claim text.