US 5,529,564 AGranted

Apparatus for depositing, guiding and pressing material web parts to be stacked

AssigneeJos. Hunkeler Ltd.

InventorHanspeter Hediger

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Abstract

Apparatus to separate web parts from a continuous web and feed them in zig-zag fashion onto a stack. Arranged at the sides of stack are holding-down elements designed in the manner of a paddle. These holding-down elements are moved along an elliptical path in such a way that they execute a movement directed downwards and laterally outwards towards the sides of the stack. In this movement, they come into contact in the region of the folding locations with the material web parts, be they individual sheets or longer parts to be folded in a zigzag form and press the engaged region of the material web parts downwards and outwards towards the sides of the stack. In this way, a satisfactory fold is formed at the respectively correct location, even in the case of material web sections which have neither been prefolded nor provided with lines of weakness beforehand. Also, a process for forming web parts, feeding them to a stack, and pressing them down as described.

Claims10

Dependent claims

Apparatus for pressing a plurality of incoming web parts fed in zig-zag fashion from above onto a stack supported by a horizontal support, said stack having a first vertical side and a second vertical side opposite said first side, comprising

a) a support mechanism outside said stack proximate said first side, comprising
(i) a first shaft having a first longitudinal axis parallel both to said first side and to said horizontal support, and
(ii) a suspension system comprising a rotatable second shaft having a second longitudinal axis parallel to said first longitudinal axis and connected to said first shaft by connecting arms, said second shaft being rigidly attached to said connecting arms and said first shaft being rotatably attached to said connecting arms and pivotally connected to said second shaft by said arms,
b) a drive means including a crank arm drivingly connected to said support mechanism to cause said first shaft to pivot relative to said second shaft in a first, vertical, closed path, and
c) a pressing element, elongated in the direction of said first axis, rigidly attached to said first shaft and extending toward said stack, said pressing element having an orientation essentially parallel to said horizontal support,
whereby travel of said first shaft along said first closed path causes said pressing element to travel a second, closed, essentially elliptical path while essentially maintaining said orientation.

3 more elements

Dependencies are inferred from the claim text.