Apparatus for forming folded stacks from a web
First Claim
1. An apparatus for forming folded stacks from a web, comprising:
- folding means for bending the webs at folding edges into multiple layers forming the stack,a stacking zone being defined adjacent to the folding means, in which stacking zone the stack is accumulated and is carried by stacking table means,separating means movable by separating drive means along a plane substantially parallel to the layers of the stack, thereby performing an inserting movement of the separating means into the stack and a retracting movement from the stack in said plane, the separating means being provided with frontal severing means for separating from each other during said inserting movement two adjacent layers of the stack at adjacent folding edges, and thereby separating the stack into an upper stack part and a lower stack part, the separating means being adapted to at least temporarily carry the upper stack part,stack removal means provided at a lower end of the stacking zone for removing the lower stack part from the stacking zone and from the stacking table means, the stacking table means being movable in a substantially vertical direction from an upper level adjacent to the separating means to a lower level adjacent to the stack removal means by vertical movement means, and said stacking table means being movable substantially horizontally by horizontal displacement means between a position beside and outside the stacking zone and a position inside the stacking zone,the stacking table means being sequentially movable by said vertical movement means and said horizontal displacement meansfrom the lower level to the upper level while the stacking table means is in the position beside and outside the stacking zone,from the outside position to the inside position while the stacking table means is on the upper level, the stacking table means closely following the separation means during the retracting movement and thereby resuming support of the upper stack part upon retraction of the separation means,from the upper level to the lower level in the inside position, during which movement the stack is accumulated on the stacking table, and,from the inside position to the outside position on the lower level after the stack is transferred from the stacking table means to the removal means.
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Accused Products
Abstract
Zig-zag folded layers of paper webs are stacked downstream of a folder on a lifting table. A belt is raised to hold a nearly completed stack from below and a separating rake with leading spear shaped heads is moved into the stack at a division between sheets, and severs the stack along a fold. The lifting table and separating rake are shifted together as the separating rake advances, during which the stack to be removed is supported on the raised belt. A new partial stack accumulates on the separating rake while the old stack is removed, the belt is lowered and the table is raised. The table and rake are then returned to their original position to resume stacking on the table. Shifting of the table and separating means, and movement of the raised belt, are driven from a common drive by means of a controllable freewheel clutch engaging over a part of the cycle.
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Citations
21 Claims
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1. An apparatus for forming folded stacks from a web, comprising:
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folding means for bending the webs at folding edges into multiple layers forming the stack, a stacking zone being defined adjacent to the folding means, in which stacking zone the stack is accumulated and is carried by stacking table means, separating means movable by separating drive means along a plane substantially parallel to the layers of the stack, thereby performing an inserting movement of the separating means into the stack and a retracting movement from the stack in said plane, the separating means being provided with frontal severing means for separating from each other during said inserting movement two adjacent layers of the stack at adjacent folding edges, and thereby separating the stack into an upper stack part and a lower stack part, the separating means being adapted to at least temporarily carry the upper stack part, stack removal means provided at a lower end of the stacking zone for removing the lower stack part from the stacking zone and from the stacking table means, the stacking table means being movable in a substantially vertical direction from an upper level adjacent to the separating means to a lower level adjacent to the stack removal means by vertical movement means, and said stacking table means being movable substantially horizontally by horizontal displacement means between a position beside and outside the stacking zone and a position inside the stacking zone, the stacking table means being sequentially movable by said vertical movement means and said horizontal displacement means from the lower level to the upper level while the stacking table means is in the position beside and outside the stacking zone, from the outside position to the inside position while the stacking table means is on the upper level, the stacking table means closely following the separation means during the retracting movement and thereby resuming support of the upper stack part upon retraction of the separation means, from the upper level to the lower level in the inside position, during which movement the stack is accumulated on the stacking table, and, from the inside position to the outside position on the lower level after the stack is transferred from the stacking table means to the removal means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification