DE1049481B - Automatic impulse control for drives of cutting machines for paper, cardboard or the like - Google Patents

Description

GERMAN

It is already known to be carried out by means of tapes which are sensed by magnetic sound heads To control work processes. For this, however, it is necessary that first on the recording medium, according to the work steps to be controlled, the recordings in the form of electrical impulses be applied. This means that before a certain work process is carried out, first the recording medium must be provided with the records, so that then in a subsequent The actual control of the machine takes place first.

This known control has the disadvantage that the record carrier is in two separate Operations must be swept over by the transducer. being during the first run over the records are given to the carrier and the records are removed during the subsequent overrun.

Another disadvantage of the known devices is that when applying the records, for example the electrical impulses, inaccuracies occur as a result of inevitable reading errors. These inaccuracies make themselves felt but especially noticeable when controlling paper cutting machines, as these Errors add up, so that there are considerable deviations in the cut lengths of the individual strips of a stack of paper appear.

Also the attempt by increasing the transmission ratio Compensating for these inaccuracies when guiding the magnetophone tapes did not produce satisfactory results Scale enlargement limits are set, so that there are still inaccuracies in the pulse application passed for the program to be cut.

The invention now relates to an automatic pulse control for drives of cutting machines for Paper, cardboard or the like with a carrier in the form of a steel tape, magnetophone tape or the like Recording of the control pulses and with a pick-up head moving over the recording medium, with which it is possible to carry out a large number of subsequent cuts, with the ~ cutting lengths below each other remain absolutely the same, so that all the paper strips run according to a specific program Cuts are congruent.

According to the invention, this is achieved with a device of the type described above by means of two in a row arranged transfer heads reached, which in one Ahdtsgang the recording pulses at the same time give and feel from the wearer. The transfer heads are useful here for the application of impulses on the carrier for self-acting impulse control

for drives of cutting machines

for paper, cardboard or the like.

Applicant:
Rudolf Mohr, Hofheim (Taunus)

Rudolf Mohr, Hofheim (Taunus),
has been named as the inventor

Execution of any cutting sequences arranged so that they can be adjusted against each other.

With this arrangement and operation of the two transfer heads, it is now possible, ie individual impulses at exactly the same distance, namely the distance that transmits between the two heads, on the recording medium au! so that the same cutting length is always obtained.

The invention is shown below with reference to the embodiment shown in the drawing explained. It shows

Fig. 1 is a schematic representation of an At sensing device on a paper cutting machine only the rear table part of the cutting machine is shown,

Figure 2 is a plan view of the sensing device.

The cutting machine 1 partially shown in Fig. 1 takes the Aul drawing carrier 3 with one end 4 on the machine frame 2, while the other end 5 is attached to a support column 6 Saddle firmly connected. In the Bt area of the recording medium, the carriage receives the transfer heads 11, 12. Here, the transfer head 11 is designed as a donor head and the head 12 as a playback head. The head 12 can be adjusted relative to the head 1 by means of an adjusting screw 13.

The way the device works is as follows:

At the beginning of the work process, a pulse is initially sent to the recorder via the encoder head 11 application carrier applied. The drive for the saddle is then fed in in a known manner switched so that the pick-up heads move along the recording medium in the direction of the arrow

809 747/36

Claims (2)

This movement continues until the playback head 12 encounters the pulse which has been given to the carrier by the encoder head 11. At this moment the feed movement is interrupted and the playback head gives the command to carry out a cut. At the same time, the transmitter head is caused, for example via a relay or the like. To give a recording pulse to the carrier. After this recording pulse has been emitted, the drive for the feed is switched on again in a known manner. The feed movement continues until the head 12 hits the pulse given by the head 11. Then, as described above, the cut is carried out. The sequence of these individual recordings or sensing takes place in one operation, the distance between the pulses on the carrier 3 then being determined by the distance between the two heads 11, 12. If any cutting sequence is to be carried out, then only the head 12 needs to be adjusted with respect to the head 11 by means of the screw 13. This new device ensures that in each case all the pulses are given the same distance from one another on the carrier 3, so that the length of the individual strips of the stack coincide with absolute accuracy. Patent claims: 1. Automatic pulse control for drives of cutting machines for paper, cardboard or the like. with a carrier in the form of a steel tape, magnetophone tape or the like. For recording the Control pulses and marked with a pick-up head that moves over the recording medium thanks to two pick-ups arranged one behind the other, which work simultaneously in one operation apply the recording pulses to the carrier and sense them. 2. Automatic pulse control according to claim 1, characterized in that the pick-up heads for the application of impulses to the carrier to carry out any sequence of cuts against each other are arranged adjustable. Legacy Patents Considered:
German interpretative document No. 1 009 271. 1 sheet of drawings © 809 747/366 1.59