DD227656A1 - CORRECTION TAPE JIG - Google Patents

Abstract

The aim and task is to provide a correction band tensioning device that requires balanced drive energy and ensures uniform belt tension even with long service life and / or shaking of the writing device. Geloest this task is characterized - that the supply reel 10 is rotatably mounted on a resiliently pivotable mold lever 13, -das the supply reel 10 is enclosed by a coil spring 14 which is applied on the one hand to the mold lever and on the other hand Anschlaege of the carrier 2, and is given by stop arms of the mold lever 13 an overload protection for the wrap spring 14. Fig. 1

Description

VEB Robotron Optima 554 - Ra

3ürom a se hinenvverk Erfurt G. Albrecht

Title of the invention

Correction tape tensioner

Field of application of the invention

The invention relates to a correction tape clamping device for writing or similar office machines, in which the withdrawal of the correction tape from the supply reel takes place against the action of a Rei brichtgesperres.

Characteristic of the known technical solutions

By DE-AS 2,542,259 a Löschband-tensioning device has become known, the Rei brichtgesperre Although a low clamping stroke allows, but in the case of longer downtime or vibration of the device, the tape tension is not maintained, and in which, depending on the constantly changing bandwicke! diameter, the

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required B to gen ergie ie relatively large differences.

The device according to DE-OS 3 003 890, in which also acts a directional lock, although allows a larger clamping stroke, but also has no, the tape winding diameter corresponding compensation of the energy required for tape transport energy and no locking of the tape as Fuse against voltage loss in case of vibration of the device.

In the tensioning device according to DE-OS 2 164 748 a locking mechanism ensures the same belt tension even with a long service life and / or vibration of the device, but the unevenness in transport energy requirements are not compensated.

Object of the invention

The invention aims to provide a correction tape clamping device for writing or similar office machines, which requires a balanced drive energy for the correction tape transport and ensures a uniform belt tension even with a long service life and / or vibration of the writing instrument.

Essence of the invention

The invention has for its object to effectively counteract the disadvantages of the known solutions in a rational way. It solves this problem by a correction tape chip nvor direction,

in which the supply reel is rotatably arranged on a spring-pivotable mold lever, in which the rear part of the supply reel is enclosed by a wrap spring, which with its one end adjoins the mold

lever is applied and whose other end cooperates with attacks of the carrier

and in which is provided by stop arms of the mold lever overload protection for the wrap.

embodiment

Embodiment 1 of the invention will be explained in more detail with reference to the drawing, which is restricted to the diagrammatic representation of the parts of the correction strap tensioning device essential to the invention.

It means:

Fig. 1 The top view of the correction band tensioning device. Fig. 2 The side view of the correction band tensioning device.

Fig. 3 The correction band tensioning device in the starting position.

Fig. 4 The correction band tensioning device in working position.

The correction tape transport device consists, as is known, essentially of the carriers 1 and 2, which are interconnected by the axis 3 and which are pivotally mounted with their bolts 4 and 5 in the print carriage frame. On the support 1, the take-up reel 6 which is operatively connected to the drive mechanism not shown is arranged, which removes the correction tape 7 via the deflection rollers 8 and 9 from a supply reel 10 arranged on the support 2.

For correction tape tension the supply reel 10 is applied to a receptacle 11 which is rotatable on a stud. 12 of the Forrnhebels 13 superimposed, and the lower part is enclosed by a coil spring 14. The wrap spring 14 is applied with its short end 14.1 to the lever 13 and acts with its long end 14.2 with the stops 2.1 or 2.2 of the carrier 2 together. The lever 13 rotatably supports on a Zapfenniet 15 which is introduced into the carrier 2, and is loaded by a torsion spring 16 in a clockwise direction.

The operation of the correction band tensioning device is as follows:

When manually or programmatically triggered correction on the winding spool 6 is rotated by the drive mechanism not shown, whereby the guided over the pulleys 8 and 9 correction belt 7 exerts a tangential tensile force on the supply reel 10. In this case, the lever 13 pivots against the action of the torsion spring 16 about the Zapfenniet 15 and the long end 14.2 of the wrap 14 releases from the stop 2.1 of the carrier. 2

Thus, the wrap spring 14 is released and the lever 13 pivots, due to their frictional resistance, to the abutment of their long end 14.2 on the stop 2.2 of the carrier 2 on. By further correction tape now the further opening of the wrap spring 14 is carried out, so that the tape take-off can take place until the end of the respective transport step. The pivoting angle of the lever 13 is different and is determined by the respective diameter of the Vorratswidkels and the adhesive force of the correction tape on the supply roll. As a result, the wrap spring 14 experiences different widths and thus exerts different intensive braking effects on the receptacle 11, so that the required correction band tensile force, regardless of the diameter of the supply roll, is approximately balanced.

If the correction tape loosen by overspinning or by extraordinary vibration of the device, then sets under the action of the torsion spring 16, an opposite pivoting of the lever 13, through which the braking effect of the wrap spring 14 is activated accordingly, or, by, in conditioning the long spring end 14.2 on the stop 2.1, the rotational mobility of the recording is blocked.

Claims (1)

Claim for invention Correction tape clamping device for writing or similar office machines, in which the withdrawal of the correction tape from the supply reel takes place against the action of a Rei brichtgesperres characterized, - That the supply reel (10) is rotatably mounted on a mold lever (13) which is pivotally mounted on the carrier (2) and spring-loaded clockwise, - that the lower part of the supply reel (10) by a wrap spring (14) is enclosed one end (14.1) of which is applied to the forming lever (13) and the other end (14.2) of which cooperates with stops (2.1 or 2.2), - And that the mold lever (13), as overload protection for the wrap spring (14), two stop arms. For this k- side drawings