DRAFTING ASSEMBLY FOR DRAFTING A FIBRE WEB

摘要

A drafting assembly for drafting a fibre web, the drafting assembly comprising: upper and lower rear apron loops having first and second support surfaces respectively being ananged to grip the card web fibres between them and transport the card web fibres from a rear entrance to a rear nip point on displacement of the rear aprons; upper and lower front apron loops having third and fourth support surfaces respectively being arranged to grip the card web fibres between them and transport the card web fibres from a front nip point to an Exit on displacement of the front aprons; the front and rear mp points being adjacent and arranged such that the front mp point receives card web fibres which exit the rear nip point; characterised in that proximate to the nip point each loop is wedge shaped with the arms of the loop on each side of the nip point converging towards flip point and having an acute angle therebetween.