US1159389A - Machine for cutting piles of paper. - Google Patents

Description

O. JOHNE.

' MACHINE FOR CUTTING PILES OF PAPER.

APPLICATION FILED JAN. 8. 1914.

1,1 59,389. Patented Nov. 9, 1915.

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TATE PATENT @FFEQE.

OTTO JOI-INE, OF BAUTZEN, GERBIANY, ASSIGNOE TO FIRM 0F BAUTZNER INDUSTRIE- WERK, AKTIENGES'ELLSCHAFT, OF BAUTZEN, GERMANY.

MACHINE FOR CUTTING FILES OF PAPER.

Application filed January 8, 1914.

per and the like, of which the following is a specification.

This invention is an improvement in, or modification of, the machine described in the specification filed with my application for Letters Patent Serial No. 762657 of April 21, 1913, in which the clamp springs are arranged in such a manner that they are tensionless when the clamp beam occupies its highest position, but that when the latter reaches the pile of paper they have already received approximately their maximum tension.

The arrangement covered by my prior specification cited presents the defect that the height of the pile that can be introduced is diminished when the maximum tension of the springs exists before the commencement of the out. As, however, the arrangement according to my prior specification cited presents the advantage of furnishing a very powerful preliminary pressure, a compromise can be effected, by arranging that the maximum height of pile, and consequently the output of the machine, are increased, the maximum tension occurring after the commencement of the cut. with this arrangement, as withthe machine covered by the main patent, a very powerful preliminary pressure is given before the cut begins, but at the same time the capacity of the machine is increased. Now the maximum tension occurring after the cut begins can be caused to decrease, as is the case when crank gears are employed, it is also possible,

however, when the maximum tension occurs at the commencement of the cut to maintain during the time of cutting a tension which is constant or approximately so, by producing the spring pressure by means of cam plates or the like. It is also possible to cause the maximum tension to take place after the cut begins and to decrease only to a small extent during the cutting operation.

Various constructional forms of spring pressure device embodying the principles set forth above can be devised. In the first place such a device can be constituted by altering the throw of the crank for tension- Specification of Letters Patent.

Accordingly,

Patented Nov. 9, 1915.

Serial No. 811,046.

ing the spring. Another method is to shift the two cranks serving to displace the knife and to compress the springs, relatively to each other, or both means can be employed in conjunction. A constant spring tension after the commencement of the out can be obtained by means of cam plates and similar constructional elements.

A machine constructed according to the invention is illustrated in the accompanymg drawings, in which- Figure 1 is a side elevation; Fig. 2 shows diagrammatically the relative positions of the two cranks. Fig. 8 illustrates a modified construction, in part diagrammatically.

Upon the shaft 9 crank disks are arranged, the pins of which are engaged in the well-known manner by a rod 13 of the knife beam. \Vithin the frame are rigidly secured to this shaft 9, toothed wheels 14: meshing with the wheels 7, these wheels 7 have eccentrically arranged pins 15 by means of which they are coupled by the intermediary of the rod 6 with the pressure yoke 18. A hollow shaft 1 is loosely mounted on the shaft 9 and is provided with arms, one of which, 16, by the aid of rods, is imparting to the presser beam 2 an up and down motion.

The other arm is located on the shaft A and engages by means of pins 20, the pressure yoke 5. Between both pressure yokes 18 and 5, the pressure springs 1 are arranged which are kept together by means of tension screws 19. I

If the shaft 9 is rotated with its crank disk, the wheels 14: and 7 are rotated and the rods connected to the wheels 7 impart to the pressure yoke 18 a reciprocating movement and by the aid of the springs 1 of the pressure yoke 5 and of the shaft 4: to the pres sure beam 2, an up and down movement.

Ev suitably adjusting the wheels 14 and 7 the relative movement of the pressure beam 2 and the knife beam 3 can be suitably governed.

The crank positions 1, 1 indicate in the diagrammatic Fig. 2 the position of the knife beam and the press beam when the machine is thrown out of gear. The knife beam has approximately the same travel as the press beam.

When the crank studs move from 1 to 3 the knife moves upward, while the clamp beam immediately moves downward. Ac-

the machine,

cordingly if a pile of paper is in the machine it'will at once be compressed. From the position 3 to the position 6 the compres sion pressure increases, the knife moves downward and commences its out between the points 5 and 6; the maximum tension of the springs does not occur until the point 6 is reached, however. The same advantage,

that is to say, obtaining a higher stroke of the press beam and consequently the possibility of inserting a larger pile of paper in in conjunction with a more powerful compression prior to the out, can also be secured by meansof cam plates. With such cams'the clamp springs can r main tensionless in the highest position of the press beam and attain their maximum tension at the time of commencing the cut. An additional advantage presented by the employment of cam plates is that the tension of the springs can be maintained constant during the entire cutting operation.

In another arrangement, the springs while remaining tensionless in the highest position of the knife, can be given approximately their highest tension at the commencement of the cut, this tension diminishing but slightly during the cut.

In the diagrammatic view, Fig. 2, the numbers 1-42 on the left hand side correspond to or indicate the movements of the knife 3 which are caused by the rod 13 with the aid of the diagrammatically shown toothed wheel. The positions of the toothed wheel indicated by the numerals 112 correspond. to the positions of the knife 3 numbered in the same manner.

Numbers 1 to 12 shown at the right hand upper side indicate the movement or the pressure positions of the presser beam 2 which are caused by the toothed wheel, dia grammatically shown in the drawing by the intermediary of the pressure yoke and springs which are not shown in said diagrammatic view. 7

On the right hand side of the lower toothed wheel another, group of numerals 1-12 is arranged which represents corresponding to the number of teeth of the toothed wheel the several pressing phases of the springs between the pressure yokes.

The numbers in the diagram representing the spring pressure correspond with the numbers for the presser beam pressure. If the first toothed wheel 14 is moving in the direction of the hands of a watch, the pin 1 of the rod 13 will move from 1 to 3. During this movement the knife beam is carried upward also according or corresponding to the scale 1-3. If now the pin 1 continues its movement from 3 to 4:, the knife beam During the operation of the wheel 14 the wheel 7 meshing with the same has also been operated and the pin 15 of the rod 6 which formerly was at point lis also moved to 7 point 3. By this movement the pressure beam has also been lowered from 13 and' the pressure of the spring has correspondingly increased. Upon the continued motion of the wheel 14 during which the pin 1 is moved from position 3 into position 9, the paper is cut.

The pressure of the pressure beam 2 however has reached its maximum in the position of the pin 15 on 6 and the pressure'is slowly reduced during the cutting operation of the knife 3.

It will be clear that by suitably adjusting the relative positions of the two wheels 7 and 14:, the relative movements may be suitably regulated.

A constructional form of the automatic spring clamp applied by a cam is illustrated in Fig. 3. By means of the cam plate 24: and of an oscillating lever 22, which is connected by means of tension rods 6 with the press yoke 18 the travel of the clamp beam and the compression of the springs are produced. The cam plate M is driven by means of a spur wheel 7 Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

i. In paper cutting machines of the char-.

acter described in combination with the cutter thereof, an automatic spring actuated paper presser, means for tensioning said springs for clamping the presser upon the paper with the maximum. pressure,after said cutter enters the material and for decreasing the pressure during the cutting op eration, substantially as described.

2. In paper cutting machines of the character described, in combination with the cutter thereof, an automatic spring actuated paper presser, a cam plate for tensioning said springs for clamping the presser upon the paper with the maximum pressure after the cutter enters the-material and for. de-

creasing the pressure during the cutting operation, and means for actuating said cam plate, substantially as described. I

In testimony whereof I have hereunto set my hand in presence of two subscribing wit-- nesses.

OTTO JOHNF. Witnesses:

PAUL Auras, O'r'ro MEDAM.

Copies of this patent may-be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1). C.

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