GB2235754A - Web drying machine - Google Patents
Web drying machine Download PDFInfo
- Publication number
- GB2235754A GB2235754A GB8917834A GB8917834A GB2235754A GB 2235754 A GB2235754 A GB 2235754A GB 8917834 A GB8917834 A GB 8917834A GB 8917834 A GB8917834 A GB 8917834A GB 2235754 A GB2235754 A GB 2235754A
- Authority
- GB
- UNITED KINGDOM
- Prior art keywords
- machine
- web
- material
- heated air
- machine according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
Abstract
Description
A DRYING MACHINE THIS INVENTION concerns a machine for drying or other heat treatment of a continuous web of an air permeable material.
In the production of non-woven textiles, certain waddings are formed by a process of carding fibres and layering them at random upon a conveying system. The fibres themselves are non-cohesive and so various methods have been adopted to produce a cohesive web of predetermined thickness. To this end the present invention is concerned with methods which require heat setting of the material in process and in particular thermal or spray bonding systems. To produce cohesion in this manner it is necessary either to mix melt or thermal fibres with the main fibrous material, or alternatively to spray resins upon the wadding surfaces. The conveyor then transports the material through a thermal or spray bonding dryer which either melts the fibres to give cohesion or alternatively cures the resin, as the case may be.
Such a dryer operates on the principle of directing heated air at controlled temperatures onto the wadding for a predetermined period as the web of material passes through the machine. The air may be directed through the material from one side or alternatively may impinge upon one or both surfaces of the web particularly in the case of resin bonding.
During passage through a dryer of this kind the wadding reduces in height and increases in density such that the heated air has a progressively greater distance to travel to impinge upon and, if appropriate pass through the wadding. Therefore, the heat transfer becomes increasingly inefficient as the material advances through the machine with the result that, conventionally, either the residence time of the material within the machine must be increased to compensate for this inefficiency, or alternatively increased air velocities and volumes must be employed involving larger systems and increased running costs.
An object of the present invention is to provide a drying machine in which the reduction in height and increasing density of the material as it travels through the machine, is compensated for in the supply of heated air.
According to the present invention there is provided a machine for drying or other heat treatment of a continuous web of an air permeable material, comprising a conveyor for carrying the web of material through the machine between inlet and outlet ends thereof and a heated air source for directing a stream of heated air towards at least one face of the web during passage through the machine; characterised in that the heated air source is adjustable in position with respect to the web such that there is maintained a substantially uniform distance between the heated air source and the adjacent surface of the web as the latter progressively reduces in thickness whilst advancing through the machine.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 is a side elevation of a drying machine made in accordance with the invention in a first operative position; and Fig. 2 is a view similar to Fig. 1 with parts thereof manipulated to perform a predetermined function in accordance with the invention.
Referring now to the drawings, there is illustrated schematically a machine framework 10 carrying a number of rollers supporting an upper endless conveying band 11 having an operative conveying run between inlet roller 12 and outlet roller 13. In Fig. 1 a web of wadding 14 is shown moving progressively through the machine, and it can be seen that the web is initially reduced in height between roller 12 and a further roller 16 at the same level as outlet roller 13.
The web is supported during its passage through the machine on a lower conveyor 17 supported between rollers 18 and 19.
Heated air is fed by a fan (not shown) to a manifold chamber 20 from which it passes through a plurality of spaced vertical ducts 21 to a plenum chamber 22 from which extend transversely across the machine a plurality of air distribution fingers 23 having their outlets directed downwardly onto the web 14, 15. The heated air stream passing through the web is collected via exhaust ducts 24 and 25.
As can be seen from Fig. 2, and in accordance with the invention the assembly consisting of the plenum chamber 22, fingers 23 and roller 13, is pivotally mounted about the axis of roller 16 such that the downstream end of the assembly may be at a lower level than the upstream end thereof. Preferably, the assembly is mounted on a platform 26 for this purpose, and a jacking screw 27 is provided to raise and lower the right-hand end of the platform with respect to the left-hand end thereof as seen in the drawings. The vertical ducts 21 are equipped with expanding connectors 28, for this purpose. Furthermore, a weight roller 29 maintains the conveyor belt 11 taut for all positions of the platform 26.
In operation, the wadding tends to loose its loft or thickness and increases its density with the effect of the heat as it progresses through the machine so that in practice it assumes a wedge-like configuration as illustrated at 30 in Fig. 2. In order to maintain a substantially uniform distance between the air supply issuing from fingers 23 and the upper surface of the material being processed, it is therefore appropriate to incline the plenum chamber 22 downwardly as provided by the mechanism described. Furthermore, the reducing height of the bottom run of conveyor 11 serves to press down upon the top surface of the web as it travels through the machine to assist in achieving the correct finished loft and material density.
It is not intended to limit the invention to the above example only. For example, the plenum chamber 22 may be maintained in a horizontal attitude, and bottom conveyor 17 may be progressively raised towards it thus to lift the reducing web progressively to maintain the uniform distance between its upper surface and the heated air source. For this purpose, jacking screw 27 and platform 26 will be replaced by equivalent means for raising roller 19, with the addition, if necessary of further support rollers along the conveying run of the belt 17.
Furthermore, the air distribution fingers 23 may be arranged longitudinally of the machine or there may be a bank of individual nozzles arranged in rows thus to apply a substantially uniform air stream across the entire surface of the web.
The jacking screw or other mechanism provided for the purpose described may be motor driven and selectable in height by the operator. Alternatively, automatic sensing means may be provided for detecting the thickness of the woven material at a certain position through the machine and for feeding a signal accordingly to the height adjustment means.
In a further arrangement the machine may consist of two zones one of which is maintained at a fixed height much as illustrated in Fig. 1 and followed by a further zone as Fig. 2 with the progressive closing of the air stream towards the web.
The height of roller 16 adjacent the upstream end of plenum chamber 22 may itself be adjustable to preset the input loft of the material according to the particular type and density of the material being processed.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8917834A GB2235754A (en) | 1989-08-04 | 1989-08-04 | Web drying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8917834A GB2235754A (en) | 1989-08-04 | 1989-08-04 | Web drying machine |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8917834D0 GB8917834D0 (en) | 1989-09-20 |
GB2235754A true GB2235754A (en) | 1991-03-13 |
Family
ID=10661148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8917834A Withdrawn GB2235754A (en) | 1989-08-04 | 1989-08-04 | Web drying machine |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2235754A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6080279A (en) | 1996-05-14 | 2000-06-27 | Kimberly-Clark Worldwide, Inc. | Air press for dewatering a wet web |
US6083346A (en) | 1996-05-14 | 2000-07-04 | Kimberly-Clark Worldwide, Inc. | Method of dewatering wet web using an integrally sealed air press |
US6096169A (en) | 1996-05-14 | 2000-08-01 | Kimberly-Clark Worldwide, Inc. | Method for making cellulosic web with reduced energy input |
EP1048913A1 (en) * | 1999-04-30 | 2000-11-02 | Superba S.A. | Process for predrying textile yarns after wet treatment and apparatus for carrying out this process |
US6149767A (en) | 1997-10-31 | 2000-11-21 | Kimberly-Clark Worldwide, Inc. | Method for making soft tissue |
US6187137B1 (en) | 1997-10-31 | 2001-02-13 | Kimberly-Clark Worldwide, Inc. | Method of producing low density resilient webs |
US6197154B1 (en) | 1997-10-31 | 2001-03-06 | Kimberly-Clark Worldwide, Inc. | Low density resilient webs and methods of making such webs |
US6473998B1 (en) | 1999-04-30 | 2002-11-05 | Superba (Societe Anonyme) | Process for pre-drying textile filaments after wet treatment and device for practicing this method |
US6579418B2 (en) | 1998-08-12 | 2003-06-17 | Kimberly-Clark Worldwide, Inc. | Leakage control system for treatment of moving webs |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB744043A (en) * | 1950-11-15 | 1956-02-01 | Algemeene Kunstvezel Mij Naaml | Process and apparatus for the manufacture of heat and sound insulating sheet material of bonded glass fibres |
GB851160A (en) * | 1958-05-14 | 1960-10-12 | Versil Ltd | Improvements in or relating to insulating material |
GB882119A (en) * | 1958-09-05 | 1961-11-15 | Bunji Kawaguchi | Improvements in or relating to apparatus for drying strips of material |
GB1499401A (en) * | 1975-03-21 | 1978-02-01 | Bradbury Saunders Ltd | Apparatus for drying or conditioning elongate material |
-
1989
- 1989-08-04 GB GB8917834A patent/GB2235754A/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB744043A (en) * | 1950-11-15 | 1956-02-01 | Algemeene Kunstvezel Mij Naaml | Process and apparatus for the manufacture of heat and sound insulating sheet material of bonded glass fibres |
GB851160A (en) * | 1958-05-14 | 1960-10-12 | Versil Ltd | Improvements in or relating to insulating material |
GB882119A (en) * | 1958-09-05 | 1961-11-15 | Bunji Kawaguchi | Improvements in or relating to apparatus for drying strips of material |
GB1499401A (en) * | 1975-03-21 | 1978-02-01 | Bradbury Saunders Ltd | Apparatus for drying or conditioning elongate material |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6080279A (en) | 1996-05-14 | 2000-06-27 | Kimberly-Clark Worldwide, Inc. | Air press for dewatering a wet web |
US6083346A (en) | 1996-05-14 | 2000-07-04 | Kimberly-Clark Worldwide, Inc. | Method of dewatering wet web using an integrally sealed air press |
US6096169A (en) | 1996-05-14 | 2000-08-01 | Kimberly-Clark Worldwide, Inc. | Method for making cellulosic web with reduced energy input |
US6228220B1 (en) | 1996-05-14 | 2001-05-08 | Kimberly-Clark Worldwide, Inc. | Air press method for dewatering a wet web |
US6143135A (en) | 1996-05-14 | 2000-11-07 | Kimberly-Clark Worldwide, Inc. | Air press for dewatering a wet web |
US6197154B1 (en) | 1997-10-31 | 2001-03-06 | Kimberly-Clark Worldwide, Inc. | Low density resilient webs and methods of making such webs |
US6187137B1 (en) | 1997-10-31 | 2001-02-13 | Kimberly-Clark Worldwide, Inc. | Method of producing low density resilient webs |
US6149767A (en) | 1997-10-31 | 2000-11-21 | Kimberly-Clark Worldwide, Inc. | Method for making soft tissue |
US6579418B2 (en) | 1998-08-12 | 2003-06-17 | Kimberly-Clark Worldwide, Inc. | Leakage control system for treatment of moving webs |
FR2792953A1 (en) * | 1999-04-30 | 2000-11-03 | Superba Sa | Method textile son predrying after wet processing and device for carrying out this method |
EP1048913A1 (en) * | 1999-04-30 | 2000-11-02 | Superba S.A. | Process for predrying textile yarns after wet treatment and apparatus for carrying out this process |
US6473998B1 (en) | 1999-04-30 | 2002-11-05 | Superba (Societe Anonyme) | Process for pre-drying textile filaments after wet treatment and device for practicing this method |
US6722053B2 (en) | 1999-04-30 | 2004-04-20 | Superba (Societe Anonyme) | Process for pre-drying textile filaments after wet treatment and device for practicing this method |
Also Published As
Publication number | Publication date |
---|---|
GB8917834D0 (en) | 1989-09-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |