Device and method for collecting the web, and drawing of the latter into the form of a strip, at the output of a carder
AssigneeMarzoli S.p.A.
InventorsSilvano Patelli, Giovanni Battista Pasini
Life of this patent
Estimating the term…
Abstract
Method and device for collection of the web at the output of a carder, and concentration of the web into a strip, in which the drawing is carried out simultaneously with the concentration of the web into a strip, between the compactor unit for the web and the pair of calenders of the discharge unit.
Claims13
A device for collecting and drawing a web of fibers from a carder having, in sequence, a doffer, an unloading cylinder, a compactor unit, and a belt conveyor, said carder being configured to concentrate the web of fibers into a strip having a width which corresponds to a width of a gap through which the strip is passed to a discharge unit wherein the discharge unit comprises:
- a pair of unloading calenders driven by a drive unit so that the unloading calenders draw the strip at a linear speed which is greater than a linear speed of the strip at an output of the compactor unit;
- and
- a control unit configured to control the linear speed of the drawing of the strip by the pair of unloading calenders relative to the linear speed of the strip at an output of the compactor unit in order to simultaneously carry out concentration of the web of fibers into the strip and the drawing of the strip between the pair of unloading calenders.
A method for collecting and drawing a web of fibers from an output unit of a carder, comprising a sequential series of steps of:
- taking the web of fibers from a doffer using an unloading cylinder;
- conveying the web of fibers taken from the doffer to a compactor unit;
- passing the web of fibers from the compactor unit to a belt conveyor;
- passing the web of fibers from the belt conveyor through a gap to concentrate the web of fibers into a strip;
- and
- transferring the strip from the gap to a discharge unit, wherein the transferring step is carried out simultaneously with the concentration of the web into the strip and includes drawing the strip between a pair of calenders in the discharge unit at a linear speed related to the speed at which the compactor unit passes the web of fibers to the belt conveyor.
Dependencies are inferred from the claim text.