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ROLLING MED is a new BTSR advanced solution and represents an upgrade version of ROLLING FEEDER device.

ROLLING MED is a universal device aimed at satisfying the widest range of both bare and covered elastomer feeding applications. Its versatility allows to fit most of elastomer packages sizes (max width 160 mm, max diameter 168 mm), thus resulting in a unique product in seamless, knitting, hosiery and medical hosiery market.

ROLLING MED is a unique solution on the market, thanks to its capability to combine in a single device the flexibility and user-friendliness of BTSR Constant Tension Feeding Technology with the product top quality resulting from bare elastomeric yarn feeding at constant LFA/speed. Thanks to the BTSR self-adaptive electronic technology, ROLLING MED is infact able to operate at constant tension yarn feeding during yarn "start/stop" working phases (or during strong yarn pattern selections) and to automatically switch to constant LFA / speed feeding during the garment production.


Based on derulè yarn reeling-off working concept, ROLLING MED technology allows to eliminate yarn "twisting effect" (flat yarns) and to guarantee the capability to feed elastomeric yarns at constant speed/LFA.

ROLLING MED System features the BTSR Patent Pending "Master-Slave Dual Working Mode" solution (derulé at constant tension / derulé at constant LFA), with possibility of selecting a single (or multiple) device as MASTER and a number of devices as SLAVE associated with the MASTER and reproducing exactly the same MASTER behaviour, thus guaranteeing the absolute stitch matching, preventing yarn plating faults in vanisè process and ensuring Top quality garment production. Combined with ULTRAFEEDER devices (configured as MASTER) installed on the machine for background yarn feeding control, the  ROLLING MED (configured as SLAVE) can operate at constant "stretch ratio", thus guaranteeing a fully automatic constant yarn feeding / stretching and Top Quality repeatability.

ROLLING MED is designed to minimize and simplify the operator tasks, thus guaranteeing the achievement of most demanding production efficiency goals and getting TOP Quality Production.

Main Features and Benefits

  • Bare elastomers feeding capability in seamless and knitting applications
  • Derulè yarn reeling-off
  • Automatic Double Electronically Controlled Yarn Feeding Capability: yarn constant tension - yarn constant LFA / speed
  • Programmable tension: 0.5 gr. ÷ 50 gr.
  • Yarn Feeding speed: up to 1000 mt/min (@ 24 V / 36 V)
  • INC/DEC function: possibility to INCreasing or DECreasing gradually the yarn tension / yarn LFA with a resolution of 0.1 gr. (0.1 m/min)
  • LFA function: exact yarn consumption measuring (Length of Yarn Absorption) with resolution of 0.1 mm
  • BTSR Master-Slave System
  • Yarn 'twisting effect' elimination (flat yarns)
  • Yarn plating faults prevention in vanisè process
  • Absolute stitch matching and top-quality production repeatability
  • Automatic constant yarn 'stretch ratio' (only in combination with ULTRAFEEDER devices installed for background yarns feeding control)
  • Extreme user-friendly operations
  • Very High machine efficiency
  • Retrofittable on any machine

headline e applicazioni

Easy Yarn Bobbin Change-over

Thanks to the special BTSR user-oriented mechanical system, extremely simple and quick yarn bobbin change-over operations for most of all elastomer pack- age sizes.


Large graphic display allowing a real time reading of all necessary information (yarn LFA, tension,...)

Integrated Tension Sensor

Fully-integrated high-precision tension sensor allowing the system to operate at the desired LFA / constant tension value (BTSR Patent Pending).

Led Keys

Ergonomic keys for easy operations and synchronized alarm signaling (green leds OK, red leds ALARM)

Smart matrix terminal

Advanced user-friendly controller for storage , visualization and control of operation parameters even in graphic way (i.e. yarn feeding tension, LFA,...)


Main Application Processes


Circular Knitting




ULTRAFEEDER 2 - The latest technologies and innovative materials in a All-in-one Solution. Utmost accuracy in Hosiery, Seamless, Knitting applications.



UNI EN ISO 9001 - UNI EN ISO 14001
ISO 9001:2015
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ISO 14001:2015
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