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.
Claims22
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 to pass in and out of the cylinder mould 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;
- and
- a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid to pass in and out of the cylinder mould 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 pickup 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 to pass in and out of the cylinder mould 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 to pass in and out of the cylinder mould 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 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 with a continuous reduction in distance between the hills and valleys and the cylinder mould which force entrained liquid to pass in and out of the cylinder mould through a fiber suspension forming on the cylinder mould so as to improve sheet formation.
Dependencies are inferred from the claim text.