Nip Load System

In modem, wide machines the nip load system uses hydraulic cylinders. Here the nip load system is still a distinguishing factor. Type A in Rg. 6.76 has a nip load system in the primary and secondary arm When the nip load is applied by the parent reel, which may have a wdght of up to 120 t the friction forces can no longer be neglected, so type A reels sometimes use a low friction linear guide for the parent roll to reduce these forces. As a further possibility the nip load may be 

2 systems primary arm for spool damp, secorxtary arm ter transfer 

With this system very low line forces can be reahzed with high accuracy. For example, now the sensitive NCR papers can be wound up with a nip allowing about double the speed. 

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