Variable hydraulic pulse drainage cylinder former
AssigneeSmurfit Carton y Papel de Mexico S.A. de C.V.
InventorLUIS FERNANDO CABRERA Y LOPEZ CARAM
Life of this patent
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Abstract
A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising a drainage means comprising a cylinder mould and a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through the fiber suspension forming on the cylinder mould so as to improve sheet formation. A baffle is provided in the discharge portion of the former to prevent stock build-up therein.
Claims21
A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising:
- a drainage means comprising a cylinder mould;
- and
- a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through a fiber suspension forming on the cylinder mould so as to improve sheet formation.
A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising:
- a drainage means comprising a cylinder mould;
- a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through a fiber suspension forming on the cylinder mould so as to improve sheet formation;
- a forming wire for recovering a formed sheet from the cylinder mould;
- at least one vacuum flat box;
- a pick up roll;
- and
- a transfer felt wherein water remaining in said sheet is further drained by way of the vacuum box to reach a desired dryness and the sheet is fed through the pick up roll where the transfer felt removes the sheet for further processing.
A method for forming a sheet of paper comprising:
- a) feeding paper stock on a cylinder mould;
- b) draining water through the cylinder mould from the paper stock to form a fiber suspension on the cylinder mould;
- c) passing the fiber suspension to a forming zone comprising an adjustable contoured member having a plurality of hills and valleys which force entrained liquid through the fiber suspension, said contoured member being adjacent to the cylinder former;
- and
- d) draining water from the contoured member to form a sheet of paper.
A method for forming a sheet of paper comprising:
- a) feeding paper stock on a cylinder mould;
- b) draining water through the cylinder mould from the paper stock to form a fiber suspension on the cylinder mould;
- c) passing the fiber suspension to a forming zone comprising an adjustable contoured member having a plurality of hills and valleys which force entrained liquid through the fiber suspension, said contoured member being adjacent to the cylinder former;
- d) draining water from the contoured member to form a sheet of paper;
- e) recovering the sheet of paper from the cylinder mould by means of a forming wire;
- f) draining water from said sheet by means of at least one vacuum box to reach a desired dryness;
- and
- g) feeding the sheet through a pick up roll where a transfer felt removes the sheet for further processing.
A cylinder former for use in papermaking comprising a rotating cylinder mould for drainage;
- a discharge portion for discharging drained water from the cylinder mould, a baffle position in said discharge portion adjacent said cylinder mould wherein rotation of the cylinder mould causes drained water to flow around the baffle providing a scouring effect.
Dependencies are inferred from the claim text.