DE7020975U - PAPER CUTTING MACHINE WITH PRESSING DEVICE FOR THE CUTTING MATERIAL. - Google Patents

Description

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DR. KURT-RUDOLF EIKENBERG PATENT ADVOCATE

• HANHOVIN · SCHACKtTIIASSE 1 ■ TELEPHONE (Οβ11> 81 40 ββKABEL PATENTION HANNOVER

H. Wohlenberg KG

301/9

Paper cutting machine with pressing device for the food to be cut

It is known that when trimming books, Catalogs and brochures on the "well-known paper cutting machines Every now and then defects occur on the spine of the book, which are visually disturbing and which under certain circumstances require post-processing or in the worst case Lead Pail to committee.

This deficiency due to the interaction of several

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Factors attributed during the cutting process consist of tearing out the corner of the back facing the knife and jumping off the fresh glued book spine.

This is how the quality of the paper, the decrease in the sharpness of the knife and the feathering of the book stack are part of the process At the beginning of the cut, the causes for tearing or fraying on the spine of the book. "The spine jumping off This is due to the lack of binding force of the still fresh glue and the displacement or concave curvature of the book spine when pressed in before the cut.

The innovation shows a paper cutting machine in which these occur in a simple manner during the cut Damage to the book spine can be avoided. This Aufgate is solved according to the innovation in that on a moving part during the cutting process, in particular on the knife holder, a pressure piece is arranged so that this is on part of the working stroke of the moving part with its entire length on a transverse to the cutting plane running side surface of the material to be cut.

The measure according to the innovation ensures that during the downward movement, for example, the The knife puts the pressure piece on the spine of the book shortly before cutting and provides additional support, so that

The food to be cut in this area is no longer sufficient or can rebound.

The innovation is explained in more detail below with the aid of an exemplary embodiment shown in the drawing explained. In the drawing means:

Fig. 1 is a partial view of a paper cutting machine in a simplified representation with the Kesser in the starting position;

Fig. 2 shows the arrangement according to Pig. 1 in working position after making the cut and

FIG. 3 is a side view of FIG. 2.

In the illustrated embodiment, a paper cutting machine is located on the cutting table 1 the material to be cut 2 in the form of a stack of books, brochures or the like. That is by means of a on the format plate holder 3 attached format plate is held in the position required for cutting. In the chosen embodiment the material to be cut is trimmed with the swing cut, i.e. the knife shaft 5 with the Knife holder 6 attached to it leads during the in

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Direction of arrow 7 downward sloping working stroke a small turn "clockwise" through, so that the inclined knife 8 in the starting position performs a pivoting movement and the knife edge at the end of the working stroke is the one in Pig. 2 assumes a parallel position to the table 1 shown. On the last part of the work stroke, shortly before the knife 8 hits the material to be cut 2, is a pressure piece 9 is applied to the side surface of the material to be cut running transversely to the cutting plane, and is supported there the back of the books or brochures forming the material to be cut. The pressure piece 9 is at the end of a Plunger 10 arranged, which in turn in a. 'Bearing arm 11 is supported. The bearing arm 11 is so on Knife holder 6 attached so that the pressure piece 9 can move close to the knife 8. The bearing arm 11 has a guide for receiving the plunger 10, in which the plunger 10 move in the direction of its axis can. A longitudinal groove is preferably provided in the tappet 10, into which a pin that can be screwed on the bearing arm 11 12 engages so that the longitudinal movement of the plunger 10 is limited by the ends of the longitudinal groove in both directions is. A compression spring 15 is arranged between the pressure piece 9 and the bearing arm 11, which pushes the plunger 10 in the raised rest position of the Kesserhalter presses against the one stop. The longitudinal groove prevents at the same time twisting of the plunger. A bar 14 is attached to the knife holder 6 for receiving the bearing arm 11, which

contains a series of thread ool ..; "O, so that the Bearing arm 11 can be screwed to the bar 14 in various positions. An elongated hole 15 enables In addition, a pin adjustment to ensure that the pressure piece 9 in the Sehnittp-osition accordingly the format size to be cut can be attached, a '16 scale provides further relief. The bearing arm 11 engages with its guide 17 (Fig. 3) the bar 14 »so that an unintentional adjustment of the device by the contact pressure is avoided. In order to itself, the flat face of the pressure piece when pressed can align to the side surface of the material to be cut, it is useful to place on the face of the pressure piece a flexibly suspended pressure plate 16 to be provided. Instead, it can also be done on the front A covering made of flexible material can be attached to the pressure piece. The bearing arm 11 is attached to the bar 14 mounted so that during the working stroke of the knife holder, the plunger 10 by the on the side surface of the material to be cut impinging pressure piece 9 is lifted against the force of the spring 13 from the stop in the guide and thus the required contact pressure is exerted on the spine of the book via the spring 13.

The pressing device according to the fire can be used at Three-knife machines, flow three-cutters and trimming machines, especially when trimming items be used with a knife in swing cut, however, the application is not for such paper cutting

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machines limited. An application with analogous constructive dimensioning is also "possible with other paper cutting machines" to which the knife is moved in a different way "during the cut".

Furthermore, the pressure piece does not need to be arranged on the knife holder, but the pressing device can also coupled to the press beam of the cutting machine are, in which case the pressing movement of the pressure piece is controlled by the downward movement of the ram.

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Claims (9)

ti ι ϊ; "." Protection requirements: 1. Paper cutting machine, in particular with a knife moved obliquely from above towards the material to be cut during the cut, characterized in that a pressure piece (9) is arranged on a part moved during the cutting process, in particular on the 1-Ie ss he receives (6) that this is supported over part of the working stroke of the moving part with its entire length on a side surface of the material to be cut (.2) running transversely to the cutting plane. 2. Paper cutting machine according to claim 1, characterized in that the pressure piece (9, 9) is arranged on a bearing arm CIl) which he receives on the boiler (.6) is adjustable in a plane parallel to the knife plane. 3 «paper cutting machine according to claim 2, dacv. -i'.i characterized in that the bearing arm (.11) has a guide for receiving a plunger (10), on whose end facing the material to be cut the pressure piece (9) is mounted. 4. Paper cutting machine according to "nspruch 3», characterized in that the plunger (.1 °) is arranged movable in the direction of its axis within the guide. 5. Paper cutting machine according to claim 4, characterized 1> I] J » -8th- shows that the mobility of the plunger (10) in the guide in "both directions is limited by stops. 6. Paper cutting machine according to claim 5 » characterized in that the guide consists of a longitudinal groove in the plunger into which a pin (12) provided on the Lagerana engages. 7. Paper cutting machine according to AII ^ rvoh 6, characterized in that spring means are provided (13) urging the plunger (10) in the raised rest position of the Hess sustainer (6) against a stop and that the position of the bearing arm (11) is selected on the knife holder (6) so that the plunger (10) is lifted by the side surface of the cutting material av..ftreffend ■ *! thrust piece (9) against the spring force away from the stop during the working stroke of the knife holder (6). 8. Paper cutting machine according to claim 7 » characterized in that a flexibly suspended pressure plate (16) is provided on the end face of the pressure piece (9). 9. Paper cutting machine according to claim 7, characterized in that a covering made of flexible material is provided on the end face of the Drucirstückes (9).