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Papermaking apparatus

a papermaking apparatus and papermaking technology, applied in the field of papermaking apparatuses, can solve the problems that the papermaking apparatus generally has little use for the tube-type board, and achieve the effects of improving paper quality, enhancing the natural harmonic pitch and improving the versatility of the papermaking apparatus

Inactive Publication Date: 2005-07-28
GL & V MANAGEMENT HUNGARY KFT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention introduces an assembly of forming elements into a papermaking apparatus to improve paper quality. The forming elements are designed to enhance the natural harmonic pitch of the apparatus and accurately control the drainage and micro-turbulence in the papermaking suspension. This results in improved paper quality, particularly for higher paper grades. The forming elements can be easily extended to different lengths and can be used with different paper grades. The upper surfaces of the forming elements create a discontinuous surface for supporting the papermaking suspension, which generates micro-turbulence in the suspension. The difference in height between the forming elements and the drainage deckles can be adjusted to create a discontinuous surface that is either stepped or irregularly stepped. The invention provides an improved papermaking apparatus that can produce paper of better quality and can be used with a range of paper grades."

Problems solved by technology

It can be a disadvantage of conventional papermaking apparatus that the design is specified in accordance with certain grades of paper (or board) and certain types or quality of pulp.
Moreover the TURBOFORM™ board is generally of little use in a slow speed papermaking apparatus.

Method used

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Embodiment Construction

[0052]FIG. 2 illustrates schematically an isolated side view of the assembly of forming elements 1 of a first embodiment of a papermaking apparatus of the invention. The assembly of forming elements 1 includes a primary blade 2 positioned immediately after the one or more supply means (not shown), a first secondary support blade 3, first and second consecutive additional secondary support blades 4a and 4b, a first drainage deckle 5 and first and second additional drainage deckles 6a, 6b. The assembly of forming elements 1 defines a discontinuous upper surface for supporting the papermaking suspension carried by a papermaking wire 7.

[0053] The primary blade 2 is illustrated alone in FIG. 4. A trailing face 42a of the primary blade 2 tapers downwardly and forwardly. A leading face 41a of the primary blade 2 is perpendicular to the upper and lower surfaces and is provided with a shoulder 42 at its upper edge. The lower surface incorporates T-shaped slots 49a, 49b which engage T-shaped...

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Abstract

The present invention relates to an assembly of forming elements which together define in a papermaking apparatus a discontinuous supporting surface for a papermaking suspension to permit drainage and micro-turbulence to be accurately controlled, and to the papermaking apparatus per se.

Description

TECHNICAL FIELD [0001] The present invention relates to an assembly of forming elements which together define in a papermaking apparatus a discontinuous supporting surface for a papermaking suspension to permit drainage and micro-turbulence to be accurately controlled, and to the papermaking apparatus per se. BACKGROUND OF THE INVENTION [0002] In the papermaking industry, various forming elements are deployed to promote the drainage of water from paper stock in its transformation from a papermaking suspension (or slurry) of fibres, water and chemicals (eg fillers) into a self-supporting web of cellulose fibres commonly referred to as a sheet (ie a sheet of paper or board). De-watering takes place in the forming area at the “wet end” of a papermaking apparatus, a typical one of which is illustrated schematically by way of example in FIG. 1. Thus in FIG. 1, parallel papermaking wires 1 (or mesh or a belt) move in direction A and are supported from beneath by discrete forming elements ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D21F1/48
CPCD21F1/483
Inventor AMOS, JOHNSALMON, ANTONY
Owner GL & V MANAGEMENT HUNGARY KFT
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