DE1012081B - Transport device for a recording strip - Google Patents

Description

For recording devices with an automatic winding device for the expired recording strip In addition to the feed movement caused by the drive mechanism, disruptive movements of the registration strip occur due to the take-up device. The change in the diameter of the Supply roll and the take-up roll forces to provide drives that take this fact into account wear. Slipping clutches of various types are preferably used for this. The same however, work more or less unevenly, creating variable tensions and possibly even discontinuities arise in the course of the registration strip. But it is very important that the Slippage of the slip clutches with increasing diameter of the take-up roll is greater and to leads to a growing load on the drive mechanism. Mostly clockworks are used as drive mechanisms serve that are sensitive to load, there is an undesirable influence on the drive mechanism and unevenness in the advancing movement of the tab. This has a particularly unfavorable effect from those recording devices in which the distances covered by the recording strip even when the actual measurement or counting results are to be dwelled or at which the accuracy of the drive mechanism particularly high requirements with regard to the total error over a longer periods of time.

The invention relates to a transport device for an overflowing from a supply roll Deflection rollers guided and to be rolled up on a take-up reel recording strips, in which only a transport wheel is driven by a clockwork. According to the invention, the take-up reel is free rotatably mounted on the axis of a swivel arm, and it is directly counteracted by a tension spring pressed the circumference of the supply roll.

Although it is known at film stores for cinema equipment, through which a directly driven film reel the to drive another film roll with by both rolls are pressed against each other by spring force, what but practically only indirectly, namely with the interposition of at least one rubber-covered Friction roller, is possible and requires a high pressure, since the smooth film strips when touching lines otherwise slide on each other. But despite a certain grip on the friction rollers, it was still there a slip can occur, special means are to be arranged in order to prevent the entrained from being left behind Avoid a roll of film, for example by deliberately increasing the amount of conveyance of the friction roller gear. For this purpose, there are now reversing clutches for changing the running direction and also useful Transport device for a recording strip

Applicant: Landis & Gyr A. G., Zug (Switzerland)

Representative: Dr.-Ing. A. Schulze, patent attorney, Berlin-Wilmersdorf, Jenaer Str. 13-14

Claimed priority: Switzerland, August 6, 1953

Dipl.-Ing. Eugen Tritschler, Binzgen via Laufenburg

(Bath.),
has been named as the inventor

a friction clutch to compensate for the excess delivery necessary. Because of the load fluctuations that occur, one must be insensitive to this use strong drive source. On the other hand, it is possible with the invention to use the drive of the registration strip, the distance of which is included in the measurement or counting result to effect a time-proportional clockwork exposed to uniform loads and the one To drive the role directly from the other role, since not the existing ones for film transport Difficulties are present.

The invention is explained on the basis of the drawings using an exemplary embodiment. In the drawings represents

1 shows a view of the transport device and FIG. 2 shows a side view of the same.

1 with a base plate is referred to, on which a coil axis 2 is attached. With the latter firmly connected is a flange 3, and on the same a bobbin 4 is rotatably mounted, the for receiving a Register strip supply roll 5 is used, which is only indicated by dashed lines in FIG. 1. To one more, on the base plate 1 attached axis 6 is a lever 7 pivotally mounted at its free end a Spool axis 8 carries the for receiving a take-up spool formed from two flanges 9 and a core 10 serves. The fixed flange 3 has a circular cutout 11 in which the Can engage flange 9 of the take-up reel. In the drawing, the relationships are for a full supply roll 5 and one only with the beginning of the

709 587/194

Claims (5)

recording strip wound take-up reel is shown. The beginning of the perforated registration strip is guided from the supply roll 5 via the transport wheel provided with teeth 12, which is driven by a clockwork (not shown) via a shaft 14, and via various pulleys 15 to the winding ■ spool, on whose spool core 10 it by introducing a. Slot is attached. The take-up roll of the recording paper that is created during the winding up and grows in size is now in line contact with the continuously decreasing supply roll 5 at point 16. If the recording strip is pulled off the supply roll 5 by the transport wheel 13, then the take-up reel 9, 10 is driven in the indicated arrow direction via the non-positive line contact 16. Both the supply roll 5 and the take-up roll formed on the take-up reel 9, 10 always have exactly the same circumferential speed in spite of different diameters that change greatly in the course of the winding process, so that the length of the recording strip withdrawn from the supply roll 5 is always exactly rolled up on the take-up reel will. The recording strip forms a closed movement and power train, which, starting from the point of contact 16, guided the pulleys 15 and the take-up reel or the take-up roller on it back to the point of contact 16 via the transport wheel 13 and, in FIG Line is highlighted. In the exemplary embodiment, it is assumed that it is a registration device in which the registration takes place by punching. Two punches 18, which are actuated in a pulsed manner by means not shown, are used for this purpose. In such a device, the transport wheel 13 is preferably arranged between the supply roll 5 and the punching device 18. Between the supply roll 5 and the transport wheel 13, the recording paper is then more taut over the short distance 19 than on the following longer distance from the punch to the take-up reel. The recording strip is pushed into the punching device by the drive wheel 13, and since the punching process always requires a certain amount of time, the recording strip can temporarily stop while it is in contact with the punch. There is only a small bend in the register strip that is continuously pushed in, which is immediately compensated for after the punch plunger has receded, so that the correct distance between the individual punch holes is maintained. The punched holes have sharp edges without tears. In the case of writing recording devices, on the other hand, the transport wheel 13, viewed in the direction of the feed movement of the recording strip, is preferably arranged after the writing point so that the recording paper is always taut at this point. At the point of contact 16, there is a return thrust acting on the topmost layer of the supply roll, which has the tendency to loosen the same. This is avoided in that the edges of the supply roll are adhesively connected to one another by additional means, for example by a thin layer of hard wax, paste or the like , the drive wheel is reversed. PA TF ΝΤΛ N S P R Γ Γ. π E: 1. Transport device ίητ running from a supply roll, guided over pulleys and rolled up on a take-up reel, in which only a transport wheel is driven by a clockwork, characterized in that the take-up reel (10) freely rotatable on the axis (8) of a swivel arm (7) is mounted and is pressed by a tension spring (17) with its circumference directly against the circumference of the supply roll (5). 2. Transport device according to claim 1, characterized in that the supply roll (5) with its coil core (4) rotatably mounted on a stationary axis (2) and laterally from a stationary one Flange (3) is limited, which has an arcuate cutout (11) into the which can engage a flange (9) of the pivotably mounted take-up reel. 3. Transport device according to claim 1, characterized in that the transport wheel (13) is arranged between the supply roll (5) and a punching device (18). 4. Transport device according to claim 1, characterized in that on the supply roll (5) the edges of the registration strip are adhesively connected to one another by additional means. 5. Transport device according to claim 1, characterized in that the axis (2) of the supply reel (4) pivotable and the axis (8) of the take-up reel (10) is stationary. Considered publications:
German Patent Nos. 362 822, 371326, 740552. 1 sheet of drawings © 709 587/194 7.57