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Rudolf Descovich

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RS 70

Ring marking system for marking hot telephone and hook-up wire insulation with colored rings. The RS 70 has been designed for use immediately after the extruder, at medium production speeds up to 1200 m/min. Four versions cover a wide range of applications.

  • Ring marking at speeds up to 1200 m/min
  • Synchronized with the line speed
  • Tandem head versions available for quick change of ring color or ring spacing on the fly
  • Reliable and robust

Rugged, virtually maintenance-free AC drive.

Marking drums run absolutely vibration-free, with no control variations.

Ink paths contain no rotating gaskets. Height-adjustable marking system can be easily engaged and disengaged without interfering with the extrusion process.

Ring marking by a pair of rotating drums with high-precision ink nozzles. Interchangeable marking drums for easy changing of ring patterns.

Marking drums for standard and custom ring patterns available.

Automatically synchronised with the wire speed by means of a 0-10 V DC signal output from the extrusion line control.

No rotating gaskets in the marking assembly

Simple installation with no changes to the extrusion line required.

Maximum marking speed does not depend on ring spacing.

Dedicated replaceable drawer-type ink tanks allow quick color change.

Available with gear pump or diaphragm pump (for water-based inks).

Two-stage ink filter system prevents clogging of ink nozzles.

Built-in ink cooler.

Ink viscosity can be measured and adjusted during operation. Requires extremely little space between extruder and take-up.

Automatically synchronized flashing stroboscope for monitoring ring quality and setting up marking parameters.


Max. marking speed:

1200 m/minute

Max. wire outside diameter: 3 mm

(special version for up to 5 mm)


The four versions of the RS 70 ring marker provide a custom solution for almost every application:

Single head marker RS 70

Production speeds depending on insulation material:

PE: up to 800 m/min

PVC: up to 1200 m/min 

Dual-head machine for simultaneous ring marking in two colors. 2 x RS 70 

Same as RS 70, except with two marking assemblies mechanically coupled by a phase adjustment mechanism. 

Tandem system allowing ring color and/or spacing to be changed on the fly. RS 70 T 

Tandem system for two-color ring marking. In single-color mode, ring color and/or spacing can be changed on the fly. RS 70 T SYN

Complete system, ready to operate. Same as RS 70 T, except with phase locked electronic synchronizer for the two marking assemblies allowing ring marking in two colors.