DK146693B - DEVELOPING COLORING APPLIANCES OF PREVENTIVE COATS, NAME TEXTILE COATS - Google Patents

Description

(19) DENMARK

fug PRESENTATION (n) 146693 Β

DIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM

(21) Patent Application No: 3947/78 (51) Lnt.CI.3: D 06 B 1/06 (22) Filing Date: 06 Sep 1978 (41) Aim. available: 30 Mar 1979 (44) Submitted: 05 Dec 1983 (86) International Application No: - (30) Priority: 29 Sep 1977 DE 2743742 22 Aug 1978 DE 2836625 (71) Applicant: EDUARD 'KUESTERS; 4150 Krefeld, DE.

(72) Inventor: Heinz 'Grueber; DE, Manfred 'Moser; THE.

(74) Plenipotentiary: International Patent Office (54) Apparatus for pattern dyeing of progressive webs, in particular textile webs

BACKGROUND OF THE INVENTION The present invention relates to a pattern-dyeing apparatus for advancing webs, in particular textile webs, and having means for forming a color liquid film extending over the web's width, and a movable air nozzle directed to the film to render the film irregular prior to its release to the web. course over

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□) Such an apparatus is known from DE-OS 23 61 517.

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trap, there is a laughable drain plate, which the pattern fluid flows down, and from whose lower edge the fluid is discharged to the path beneath. An air nozzle is directed to the film flowing down the drain D plate.

In order for such an apparatus to give a characteristic or expressive pattern, it would have to have a plurality of air nozzles, all of which could be moved separately. However, such an apparatus would be complicated and expensive.

It is an object of the invention to provide such a design of a pattern dyeing apparatus of the specified kind that it will be possible, with simple means, to obtain a characteristic or expressive pattern effect on the web.

For the purpose of this task, the air nozzle is formed near a film and transverse to the film, rotatable tube which is movable back and forth in the transverse direction of the web, which has distributed air flow openings over the surface and is connected to a compressed air supply.

Such a tube is a single element that simply requires uncomplicated bearing and an appropriate drive mechanism. Nevertheless, it can assist in pattern formation in three ways, namely by its pivotal motion, its reciprocating motion, and by the distribution of air outflow openings over the surface. This makes it possible to attack the film in many places or in many points by means of the air from the air outflow openings and thereby obtain a correspondingly expressive pattern effect.

A preferred embodiment of the apparatus according to the invention, in which it has in a known manner an overlying roller and in its transverse direction, which is arranged and arranged so that it dips into a pattern liquid also transversely arranged over the track and with its surface including pattern liquid from the trough, as well as with a bevel directed web which is arranged to wipe pattern liquid from the roller and from its lower longitudinal edge to dispense this pattern liquid to the web, is characterized in that the tube is placed over the rocker.

On the other hand, where the apparatus in another embodiment has means arranged over the web to produce a liquid veil which falls on the web and extends across it, the pipe may be positioned at the height of the veil.

It will be appreciated that the distance of the pipe over the rocker or from the veil may be adjusted depending on the available air pressure and the desired pattern effect.

To avoid unnecessary compressed air consumption, the apparatus may have a cover to close the air outlet openings away from the film in the tube.

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This cover may be a slotted tube which may grip around the perforated tube or may be disposed within it so that the slot exposes a segmented area of the tube over its length, thereby allowing air outflow to the film in that area.

According to the invention, an important measure enabling a further increase of the many pattern possibilities is that the place from which the pattern liquid falls down the path without further influence is height adjustable.

This measure has a surprising influence on the influence of the pattern images formed. When the pattern fluid has only a short drop path or in other words is transferred almost directly from the bottom edge of a blade or similar element to the web, a pattern is obtained with fields that have clearly limited, calm contours. The higher the distance or drop path, the more the pattern images dissolve.

In the case of a paint application with a doctor blade, it can suitably be height-adjustable with the pipe, roller and trough together with respect to the web.

Similarly, the aforementioned means for producing a fluid veil together with the tube may be height adjustable relative to the web.

Of course, this does not exclude the fact that the pitch can also be changed by leading the pitch to different heights. Normally, however, it is simpler to design the pattern forming apparatus itself.

The pattern or pattern image may also be affected by adjustable distance of the tube from the film formed by the pattern fluid. What size should be considered in each case can be ascertained by experiment. This, like the adjustment of the drop height, depends on the nature and viscosity of the pattern liquid and of course also on the desired pattern.

The drawing shows some embodiments of the apparatus according to the invention, fig. 1 is a perspective view of an apparatus for pattern staining of carpet webs; FIG. 2 and 3 are schematic side views of two different embodiments of this apparatus; FIG. 4 shows a larger-scale detail with a special design of the pipe with the air outlet openings; FIG. 5a to 5d different pattern images on carpet webs, obtained at various drop height settings with an apparatus according to FIG. 1 and 2.

The whole of FIG. 1, 10 illustrates the pattern staining of a carpet web 1 which moves forward in the horizontal direction as indicated by arrow 9. Across the carpet web 1 is a trough 2 of color liquid. The lower part of a roller 3 dips into this color liquid which is included by the surface of the roller during the rotation of the roller in the direction of the arrow 4 about the shaft 5 lying transversely of the goods web. From the roller surface, the color liquid is removed by means of a blade 6 arranged on the downward side of the roller 3 and is directed obliquely downwardly onto the carpet web 1. The liquid flows down the surface of the rake 6 in the form of a film 22 having the same width as the carpet web 1 and having a regular and continuous on the upper part. but which on the lower part is made irregular, as will be explained in more detail below, and connecting from the bottom 7 of the rocket 6 forms an irregular veil 8 which falls on the carpet web 1.

The color liquid film on the rocker 6 is made irregular by a tube 11 which is closed at one end 12 and which at the sides of the rocket is mounted in bearing brackets 13. The other end 14 of the pipe 11 is connected to a drive mechanism 16 with a motor 15, whereby the pipe 11 can be partly rotated as indicated by the arrows 17 and partly can be communicated a reciprocating movement across the path 1 as indicated by the arrow 18. Through a movable hose 19, the end 14 of the pipe 11 is connected to a pump 20 supplying compressed air to the pipe 11.

The tube 11 has air outlet openings 21 which may be spaced regularly or in a suitable pattern. Through these apertures 21, the compressed air in the form of rays 23 is discharged against the hitherto widely circulated color liquid film 22, thereby rendering this film irregular.

In the embodiment of FIG. 1, also schematically shown in more detail in FIG. 2 and 4, the air jets 23 hit the color liquid film 22 while still on the shingle 6. As indicated in FIG. 4, this causes the dye liquid film to be locally displaced and stiffened in adjacent areas in the form of beads, causing the initially uniform film 22 to form an irregular fluid layer 24; 1, which slides down the lower part of the rocker 6 and from its lower edge is delivered to the web 1 in the form of a quite irregular veil 8, which results in a corresponding, irregular pattern 25.

By appropriate selection of the movements in the direction of the arrows 17 and 18 and of the distance 32 from the pipe 11 to the rocker 6, fig. 4, the air pressure in the pipe 11 and the location and size of the air outflow openings 21, the pattern image may be affected in the desired manner.

While in the embodiment of FIG. 1, 2 and 4 are positioned above the rocker 6, FIG. 3 shows an embodiment in which the tube 11 is positioned at the height of the liquid-liquid veil 29 falling from the bottom edge 7 of the rocker 6, in this case, therefore, the veil 29 is still regular at the moment it leaves the lower edge 7, and it is first made irregular by the air jets 23 during the fall and thus at this time is transformed into an irregular veil 8 which falls on the carpet web 1. For trapping the parts blown away by the air jets 23 a trough 26 extending over the web width can be used. channel 27, from which the liquid can be diverted through a conduit 28 for recycling.

In FIG. 4, there is shown a cover in the form of a slotted tube 30 which surrounds the tube 11 with the air outlet openings, leaving only on the side facing the liquid film 22 a segment 31 through which the air jets 23 can exit. Above the other part of the circumference, the outer tube 30 covers the air outlet openings 21, so that the air outlet is limited to the segment 31, thereby reducing the loss of compressed air. The tube 30 can simultaneously serve as a bearing for the tube 11.

The staining apparatus can be used in many different ways. Furthermore, several apparatus of the kind shown and with the same or different pattern fluids may be inserted one after the other. Prior to the pattern application or between the various pattern applications using multiple consecutive devices, the web material may be subjected to appropriate pre- and intermediate treatments, for example, impregnation with a wetting agent or thickening agent, priming with a Foulard or shaving mill, etc. The pattern liquid may be applied to this wet web, but can also be dry or dried.

The free fall height of the color liquid is of major importance to the pattern image. For this reason, the entire pattern application device may be height adjustable over the web 1 as indicated by arrow 33; 1. Hereby different drop heights 34 are obtained, FIG. 2, between the lower edge of the rake 6, from which the color liquid is released in a free fall, and the carpet web 1.

The effect of such an adjustment is illustrated in FIG. 5a to 5d. In these embodiments, the following data is used.

The flow rate of the carpet web 1 10 m / min

Speed of the roller 3 39 rpm

Pipe speed 11 33 rpm

Stroke of the pipe 11 in the direction of the arrow 18 65 beats / min

Stroke length of the pipe 11 110 mm

Tube pressure 11 60 mg

The color liquid viscosity 800 cP.

In the example of FIG. 5a, the drop height 34 amounts to 0 mm, ie. the carpet web 1 ran practically directly below the bottom edge of the rocker 6 and took over from this dye liquid practically without falling height. The pattern images show clearly delimited pattern fields with quiet contours.

In the example of FIG. 5b, the drop height 34 was 70 mm, in the example of FIG. 5c to 250 mm and in the example of fig. 5d to 600mm. The clear demarcation of the pattern fields was, as a matter of fact, disintegrating because the falling color liquid on the way down to the carpet web 1 was increasingly broken.

Also in the embodiment of FIG. 3, the free fall height of the dye liquid can of course be varied, the pattern application device being arranged at different heights above the web, as indicated by the two possibilities for the position of the carpet web 1 relative to the device.