DE2424325A1 - CUTTING MACHINE - Google Patents

Description

DIPL-ING. ROLAND McPTENS 6 Frankfurt α. Μ., July 19

DIPL-PHYS. DR.RAINER KEIL Ammelburgstrasse 34

_______——— Telephone 59 0045

j-: patent attorneys | SUBMITTED | Telex MU 354 2424325

F 83 P 54 -fi

CeIr .:

GRAPHA - HOLDING AG, Hergiswil / Switzerland, Seestrasse

Cutting machine

The present invention relates to a cutting machine for trimming the same individually fed brochures with a continuously movable up and down Cutting block with at least two knives attached to it for head and foot cuts.

Such a cutting machine is known and is described, for example, in CH-PS 3 ^ 0 H 79. Before making the head and foot cut on a brochure, the brochure lies on a horizontal support plane, polygamy

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is formed by two counter-eaters, one of which is assigned to one of the mentioned i-eaters. In this known device, the cutting edges of the knives are inclined at an angle between 0 and 30 ° with respect to the horizontal support plane. This arrangement of the cutting edges results in a substantially clean head and foot cut. However, it has the disadvantage that the back of the brochure cover, which is oriented at right angles to the support plane, during the cutting process? is dipped through the cauldron, causing the • brochure flap spine to fray when cutting the head and foot. The invention aims to improve the cutting machines of the type mentioned such that the leg Broschürenurr.schlagrücken ^"1 head and foot does not fray.

According to the invention this purpose is achieved in that the part of the that is intended to cut through the spine of the brochure during the head and foot cut The cutting edge of the side knife forms an angle between 60 and 90 ° with the support plane of the brochure.

Using the attached schematic drawing, the Invention explained for example. Show it:

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1 shows a detail from a cutting machine in side view, with parts broken away,

FIG. 2 shows a section along the line II-II according to FIG. 1

FIG. 3 shows the same representation as FIG. 1 of a second exemplary embodiment and

Fig. 4 shows the same representation as in Fig. 1 of a third. Embodiment.

The cutting machine shown in detail in Fig. 1 comprises a first cutting station A and a second cutting station B. The cutting stations A and B are successively fed to a conveyor belt 1 brochures 2, where they abut stops 8 and 9 that are movable in the transport path. At the first trimming station A, the brochure 2 is trimmed at the head and at the foot, with its front side being trimmed at the second trimming station B. For the head and foot cut and for the front cut, two side knives k and * J0 and a front knife 10 are attached to a cutting block 3 that can be continuously moved up and down. Fixed counter knives 5 j 50 cooperate with the side knives H, ¹ JO, which form a flat support surface for the brochures 2 at the first trimming station A and along which the side knives ¹ J, 40 sweep past during a cutting cycle. The cutting edges of the side knives ¹ I, ¹ IO comprise two parts 6 and 7. The first part 6 is intended for the head or foot cut from the front of the brochure to just before the back, while the second. Part of the head and foot cut of the brochures *

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back R cuts through. The part 7 of the cutting edge ^ St * ^ ** angled against the support plane of the brochure 2 and forms with this a V / angle JZ between 6ö and 90 · If the cutting block 3 is lowered, the spine R of the cover sheet of the brochure 2 becomes through the angled part 7 of the cutting edge of the side knives 4, 40 pressed against the brochure and cut through; at the same time, the other part 6 of the cutting edge trims the booklet 2 at the top and bottom in a known manner. The bending of the cutting edge J prevents the back of the brochure cover R from being compressed.

In the exemplary embodiment according to FIG. 3, equivalent reference numbers designate the same or equivalent parts as in the exemplary embodiment described above. The two counter knives 5 \ 50 ^{t of} the first trimming station A ¹ form a horizontal support surface for a booklet 2 ¹ to be trimmed at the head and foot, which lies aligned against the stops 8 ^r . In contrast to the embodiment described first, the second part of the cutting edge of the side knives 4 ¹ , 40 'is angled away from the support surface formed by the counter knives 5 ^f. The angled part 7 'of the cutting edge forms an angle JZ ^f , of 6C-90 ⁰ with the support surface. For the top and bottom trimming of the brochure 2 ¹ , the cutting block 3 'is lowered. First, the top and bottom of the brochure is cut through the first in a known manner

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Part 6 'of the side knife * l', JJO 'trimmed. The back R 'of the brochure cover is ^{trimmed by the angled part 7 1 of} the cutting edges. This hits the spine R ¹ at a very acute angle, v / o it is cut through and not compressed, which ensures a clean cut in the area of the spine of the brochure.

In the exemplary embodiment according to FIG. K , equivalent reference numbers designate the same parts as in the exemplary embodiment described first. In contrast to this, the side blades are 40''entsprechend the parts 6 and ^M 7 'from zv / ei separate parts made. The part 6 '' of the side knife 40 ' ^! is provided with a straight cutting edge and is firmly connected to the cutting block '3'. On part 6 ^f! An angle piece 11 is fastened by means of screws 12. The second part 7 of the side knife ¹ IO ¹ 'is fastened to the free leg of the angle piece 11 by means of a screw 13 which is secured by a screw 1H. This Aust management example simplifies the grinding of the side knife JJO ¹ '. Furthermore, the slope jQ ^t! the cutting edge of the part 7 ¹ 'without changing the inclination of the cutting edge of the other part 6' ¹ can be freely selected depending on the product to be processed.

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Claims (5)

Claims I) / cutting machine for trimming them one by one fed brochures with a continuously up and down movable cutting block (3) with at least two on it attached side knives (4, 40) for the, head and butt cut, characterized in that during the head and foot cut for cutting through the spine of the brochure certain part (7) of the cutting edge of the side knives (4, 40) with the support plane of the brochure (2) includes an angle 'X) between 60 and 90 °. 2) Schneidcmciücmne "nacn! 'Aienianspiui.« 1, J ^ d'irch marked, that the mentioned part (7) of the cutting edge is angled against the support plane. 3) Cutting machine according to patent claim 1, characterized in that the mentioned part (7 ¹ ) of the cutting edge is angled away from the support plane. 4) Cutting machine according to claim 1, characterized in that the side knives (40 ¹¹ ) corresponding to the mentioned parts (6 ¹¹ , 7 ¹ ') of the cutting edge are made of two firmly but detachably connected parts. 409881/0325 5) The cutting machine according to claim 4, characterized in that (Q of the aforementioned part (7 ¹¹ <?) Knife part having the cutting edge is pivotable for adjusting the angle with released connection about a transversely oriented to the cutting plane. 409881/0325