NBN EN 12301 : 2000 + A1 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 List of hazards
      4.1 Mechanical hazards
      4.2 Electrical hazards
      4.3 Thermal hazards
      4.4 Hazards due to noise
      4.5 Hazards generated by neglecting ergonomic
             principles
      4.6 Hazards due to failure to energy supply
      4.7 Hazards due to failure of the control systems
      4.8 Slip, trip and fall hazards
5 Safety requirements and/or measures
      5.1 Mechanical hazards
      5.2 Electrical hazards
      5.3 Thermal hazards
      5.4 Hazards due to noise
      5.5 Hazards generated by neglecting ergonomic
             principles
      5.6 Hazards due to failure to energy supply
      5.7 Hazards due to failure of the control systems
      5.8 Slip, trip and fall hazards
6 Verification of the safety requirements and/or
      measures
7 Information for use
      7.1 Instruction handbook
      7.2 Marking
Annex A (informative) Examples of different types of
                      calenders
Annex B (informative) Examples of calendering processes
Annex C (informative) Hazards generated by the materials
                      being processed
Annex D (informative) Calculation of dimension L of the
                      trapping zone (for rolls of equal
                      diameters)
Annex E (informative) Fixed guards at the trapping zone
Annex F (informative) Example of a particular type of guard
                      with limited movement preventing
                      access to the trapping zone
Annex ZA (informative) Clauses of this European Standard
                       addressing essential requirements or
                       other provisions of EU directives
Bibliography

Requirements for safety relating to the design and construction of multi-roll calenders intended for the processing of rubber or plastics are defined. The calender alone, including all components fixed to its frame are concerned with this standard. Examples of various types of calenders are shown in Annex A and calendering processes are shown in Annex B. The standard deals with the significant hazards listed in Clause 4. The following machines are excluded: two-roll calender forming an integral unit with an extruder (roller head); two or three-roll polishing, laminating and embossing units (which are not calenders) installed downstream of extruders in film processing lines.