Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Reexamination Certificate
1999-02-02
2001-02-27
Rada, Rinaldi I. (Department: 3724)
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
C083S510000, C083S566000, C083S086000, C083S150000, C083S167000, C083S202000, C083S487000, C083S659000, C083S945000
Reexamination Certificate
active
06192778
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The invention relates to a cutting apparatus for separating packages from a line.
The field of application of the invention is, in particular, the cutting-out of single thermoplastic cups during the online production, filling and packaging thereof. The thermoplastic cups receive food preparations such as cottage cheese or other milk products, pudding, jam, beverages or the like. It also applies analogously, however, to plane cardboard blanks.
2. Description of the Prior Art
The cutting-out is normally effected by a punching cut with an upper knife and a lower knife. The upper knives have to be precisely aligned with the lower knives. This involves a great deal of difficulty. Special upper knives and lower knives are required for each cutting pattern. When changing over to another cutting pattern, these upper knives and lower knives must in each case be set precisely. A drop-through punch has to be employed for the processing of thermoplastic cups with a circular cross section.
DE 78 16 238 U1 describes a roller punch in which a pivotable punching knife resting on interconnected packages to be cut is, for the cutting, moved through between two pressure rollers. The cut packages can be removed after the punching knife has been moved back and swung up, so that the mode of operation is very time-consuming.
SUMMARY OF THE INVENTION
The object of the invention is to simplify the cutting apparatus and shorten the set-up times and the work cycles.
This object is achieved according to the invention by designing the cutting apparatus with a lower knife capable of being moved in between the packages in the vertical direction from below and with an upper roll capable of being moved, together with a discharge gripper for the separated packages, parallel to the conveying section while being pressed against the lower knife.
The invention differs from the prior art in that only a lower knife which is adapted to the cup cross section and cup batch is in each case required for the cutting, while the upper roll is to a large extent universally usable. The use of an upper roll makes it possible to provide very narrow edges in the lower knife at the end edge of the thermoplastic cups, so that even round cups can be readily held in the lower knife and picked up by a gripper.
Particularly simple guidance of the upper roll is achieved by virtue of the fact that the upper roll and the discharge gripper are seated on a slide moved by a drive belt.
Secure mounting of each single blank is ensured by virtue of the fact that the lower knife has chambers with a bearing edge for each single blank.
Gentle cutting is achieved by virtue of the fact that the upper roll is designed as a squeeze roll.
The cutting conditions can be varied in that the squeeze roll comprises rings arranged side by side in the axial direction.
An individual radial movement of the rings and thus compensation for tolerances are achieved by virtue of the fact that each ring is supported on a supporting ring in such a manner as to yield in the radial direction.
The resistance to wear is increased by virtue of the fact that the rings are made of steel.
An optimization of the cutting pressure is possible by virtue of the fact that a shaft of the upper roll is supported in rails and that the rails are adjustably held on a tool carrier.
Optionally, a design in which the upper roll is designed as a knife roll is also possible.
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Ashley Boyer
Rada Rinaldi I.
Schindler Edwin D.
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