Gap Former Paper Machine

JP3828148B2

The invention concerns a gap former in a paper machine, comprising a twin-wire zone, which is composed of a first forming-wire loop (10) and of a second forming-wire loop (20) and which starts from the forming gap (G), into which the slice part (31) of the headbox (30) feeds a pulp suspension jet. The forming gap (G) is defined, from one side, by the first forming wire (10), …

PrimeForm forming sections for paper and board machines …

PrimeForm forming sections for paper and board machines The ANDRITZ PrimeForm product family covers the complete range of Fourdrinier machines, hybrid formers, and gap formers. ... The newly developed PrimeForm TW gap former performs excellently at high speeds with minimal two-sidedness and highest dewatering performance. Grammages from 90 to ...

Rate-limiting mechanisms of water removal during the …

Forming Blades (some gap-former paper machines) Though published information about dewatering events on Fourdrinier (single forming fabric) paper machines is more abundant, some excellent studies have been reported having to do with dual-fabric paper machine designs (gap formers, which are also called twin-wire formers), which have become ...

Twin-wire gap former in a paper machine

A twin-wire gap former in a paper machine in which an outer wire and an inner wire are guided by guide rolls and by web forming members. The wires form a twin-wire zone which starts from a forming gap into which a slice part of a headbox feeds a stock suspension jet. The forming gap is followed by a curved portion of the twin-wire zone which is guided by a first forming roll placed …

Paper Machine Room Ventilation Guidelines

Exhaust Systems – Gap Former Paper Machine Room Ventilation Guidelines - 20 NO. 1 WIRE STRETCH ROLL HP CLEANING SHOWER HEADBOX AREA NO. 1 WIRE LOOP & SAVEALL FELT NO. 2 WIRE LOOP & SAVEALL Gap Former Pickup Location Flow Factor, F ft Headbox area 0.47 No. 1 Outer/Backing Wire Loop & Saveall 0.28 No. 1 Stretch Roll 0.24 No. …

DuoFormer Base II – a step towards the future

cant influence on paper properties. Year Gap former Gap former with additional fourdrinier wire Trend in Speed Design Speed of the corresponding PM 2,000 1,600 1,200 800 400 0 300 250 200 150 100 50 ... paper machines for many years. Adapting it for packaging papers was therefore nothing but a logical consequence. For light and medi-

Equipment and Unit Operations | Opportunities in …

In a twin-wire paper forming machine or "gap-former" the jet of furnish from the headbox is directed into the narrowing gap between two forming fabrics. Water is removed in both directions. The rate of water removal may be enhanced by …

Paper Machine Design and Operation--Descriptions and …

"Paper Machine Design and Operation--Descriptions and Explanations" By Gunnar Gavelin ... Valmet Speed Former 86 4.8 Speed Former and Paper Quality 87 4.9 Blade-Roll Former 88 4.10 Description of Specific Formers 88 Bel Baie III 88 Bel Baie IV 90 Voith DuoFormer CFD 91 4.11 Horizontal Gap Former 94 4.12 Forming Fabrics 95 4.13 Theory of Two ...

OptiFormer Gap

Valmet's novel gap forming technology OptiFormer Gap utilizes innovative shoe and blade technology to gain superior paper or board quality. The formation of this gap former has beaten all other references. Login. en. - Chinese ...

Twin wire gap former paper making machine with variable …

A forming section for a gap blade former type papermaking machine having a headbox which delivers a jet of papermaking stock between a conveying forming fabric and a backing forming fabric is provided. The conveying fabric moves in sliding contact over an impingement shoe on which the jet of papermaking stock is delivered at a point of impingement.

Paper Machine Optimization

Module 22: Gap Former Designs and Variables . Module 23: Dynamics of Gap Forming and Drainage . Module 24: Gap Former Troubleshooting, Shear Levels & Vacuums . Module 25: …

Hybrid former for a paper machine

The present invention also relates to a method in a hybrid former of a paper machine. A gap former is mostly better than a hybrid former both in view of the quality of the paper and in view of the runnability, but for many paper mills, a gap former, which also requires modernization of the existing headbox, is an excessively costly construction.

DuoFormer Base II – a step towards the future

Fourdrinier paper machines with low operating speed and high basis weight range are decreasing. The trend clearly goes towards higher speeds and lower basis weight - the …

Gap Forming | Industrial Efficiency Technology & Measures

Gap formers act as an alternative to the Fourdrinier paper machine. They receive furnish which is injected into the head box through a gap of air onto a twin wire unit. As the furnish passes between the wires, moisture is removed from the fibers through the wires forming a paper web from the pulp between the wires. Rolls, blades, or vacuums facilitate the removal of excess …

gap former paper machine manufacturer

Gap Former. In a twin-wire paper forming machine or "gap-former" the jet of furnish from the headbox is directed into the narrowing gap between two forming fabrics . Get Price; Patent US5074966 - Gap former in a paper . A gap former in a paper machine, comprising a lower wire loop (10) and an upper wire loop (20), which together define a ...

8 Paper Machine Troubleshooting

paper machine. Although it is difficult to list all possible causes for all machine types, these lists can be used to provide guidance in troubleshooting most equipment. 8 1 Forming Section Troubleshooting Guide Symptom Areas to Consider Barring • Condition of rolls (vibration) • Seals on couch roll • Vibration on all machine elements

KR100356281B1

The present invention relates to a gap forming machine of a raised machine, comprising a twin wire zone, the twin wire zone consisting of a first molded wire loop (10) and a second molded wire loop (20) and formed from a forming gap (G). Beginning, a thin portion 31 of the headbox 30 feeds the pulp float jet into the forming gap. The forming gap G is defined by the first forming …

Twin-wire former in a paper machine

In a twin-wire former in a paper machine, an operation of a hybrid former mode and that of a gap former mode are conducted, and papers of quality conforming to the kind of papers can be made in a wide range of basis weight with regard to multiple kinds of papers.In the twin-wire former, a forming roll, which guides a top wire so that it can approach to a bottom …

Gap Former Paper Machine | Stock Preparation Area | Solenis

Check out our Gap Former Paper Machine process as well as our stock preparation area with images. For more info, please visit our website or contact us.

Equipment and Unit Operations | Opportunities in …

GAP FORMER IN A PAPER MACHINE

Twin-wire gap former in a paper machine

Paper Machine Clothing | Forming Fabric | Hehuang

2.5-layer Forming Fabric Developed for the forming section in paper machinery for of and writing paper machines, our 2.5-layer forming fabric introduces high fiber support index (FSI) which results from an improved surface-yarn density. This allows better sheet-side smoothness as well as improved retention compared to a 2-layer design.

Tips for Reducing Forming Fabric Drive Load

elements on a gap former as noted below for Fourdrinier table elements. If a reduction in drag load is needed to meet the optimal standards, the vacuum schedule, vacuum slot standards, and ... Paper Machine Speed < 600 m/min (~2000 ft/min) ≥ 600 m/min < 3.5 kN/m (20 pli) is a very well managed machine < 4.4 kN/m (25 pli) is a very

Forming concepts

The DuoFormer TQv is a vertical roll-blade gap former that was developed for fast-running machines and ensures optimal sheet quality. The former section has a big influence on the …

CA2029002C

Paper (AREA) Prostheses (AREA) Investigating Or Analysing Biological Materials (AREA) CA002029002A Gap former in a paper machine Expired - Fee Related CA2029002C (en) Applications Claiming Priority (2)

Valmet forming section

Valmet provides a comprehensive range of paper machine forming section applications for the varying requirements of different board and paper grades and speed ranges. The forming section concepts include …

OptiFormer Gap forming section for board

Gap former: OptiFormer Gap forming section with roll and blade technology is an optimal forming concept for lightweight recycled fiber-based fluting and linerboard for high …

Dryer Fabrics | Paper Machine Clothing Manufacturer

Hehuang provides 4 kinds of dryer fabrics for use in paper and board machines for paper making. 1.5-layer dryer fabric (round yarn), 2-layer dryer fabric (round yarn), single warp dryer fabric (flat yarn) and double warp dryer fabric (flat yarn). ... High Speed Gap Former Paper Machine; High Speed Hybrid Former Paper Machine; Multi-Fourdrinier ...

US 5,074,966 A

Patent US5074966A - Gap former in a paper machine (US 5,074,966 A); Owner: Valmet Paper Machinery, Inc.; Filed: 10/24/1990; Est. priority date: 11/06/1989; Status: Expired due to Term; Abstract: A gap former in a paper machine, comprising a lower wire loop (10) and an upper wire loop (20), which together define a substantially horizontal twin wire forming zone, which …