Coating apparatus – Immersion or work-confined pool type – Running length work – longitudinally traveling
Patent
1996-03-08
1997-11-04
Czaja, Donald E.
Coating apparatus
Immersion or work-confined pool type
Running length work, longitudinally traveling
118 36, 118405, 118419, 118428, 118429, 68 11, 68175, 68200, 81512, B05C 312
Patent
active
056835116
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an apparatus for applying liquid to a yarn sheet.
2. Description of the Related Art
Such an apparatus is known from DE-A 34 12 039. Here, the liquid is fed to the yarn sheet via a liquid-permeable surface consisting of a sintered material. The liquid-permeable surface can have grooves. Since the distance traveled by the liquid through the liquid-permeable surface with grooves varies, uniform delivery of liquid to the individual threads is not guaranteed. While a relatively large amount of liquid is discharged at the bottom of the groove, only a slight amount of liquid is observable on the walls. For this reason, it is apparently recommended to use two such surfaces situated opposite each other with respect to the yarn sheet. Moreover, a disadvantage of using sintered material is that it clogs pointwise after extended use, so that after a time, when used to apply liquid to threads of a yarn sheet, not all threads are supplied with the same quantity of liquid. If this occurs, the entire sintered-material body must be replaced. A further disadvantage is that the known apparatus can be adapted only at great expense to yarn sheets of differing thread counts and/or thread separations.
Although, in applying liquid to individual threads, thread wetting elements are known that have a thread guide groove and a liquid feed associated with the thread guide groove, their liquid feeds are supplied by delivery lines (DE-U-74 42 133, DE-A-24 33 507). These apparatus are very costly, since all delivery lines to the liquid feeds must be supplied with the same amount of liquid, something usually achieved by making the lines equally long. These apparatus are fully unsuitable for applying liquid to threads of a yarn sheet, because the known apparatus provided to treat individual threads would require large thread separations. Consequently, an enormous amount of space is needed for such an apparatus. For this reason, the known thread wetting elements for wetting individual threads have been rejected for use in wetting yarn sheets.
The objective of the present invention is to implement an apparatus for applying liquid to threads of a yarn sheet, having a thread guide groove for each thread, a liquid feed terminating in the thread guide groove, with all liquid feeds being supplied by a liquid distributor, in such a way that liquid application is uniform and the apparatus can be adapted in a particularly simple manner to differing thread counts and/or thread separations.
SUMMARY OF THE INVENTION
The above objective is met by an apparatus for applying a liquid to threads of a yarn sheet which comprises multiple thread wetting elements, each of which has at least one thread guide groove for each thread. In the thread guide groove the thread travels with the liquid in a direction from the thread feed end to the thread exit end and each thread guide groove has one associated liquid feed bore or groove for supplying the liquid to the thread guide groove. The liquid feed bore or groove terminates in the thread guide groove. There is a liquid distributor which is implemented as a support to which the thread wetting elements are attached and which supplies liquid feed to each liquid bore or groove. The separation of adjacent thread guide grooves is 2 to 30 mm, and adjacent thread guide grooves are different distances from the liquid distributor such that the thread guide grooves are offset in an alternating manner.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a cross-section through an apparatus of the invention,
FIG. 2 shows a side view of the apparatus of FIG. 1,
FIG. 3 shows the plan view of the apparatus of FIG. 1,
FIG. 4 shows a side view of an individual thread wetting element of the apparatus of FIGS. 1 to 3,
FIG. 5 shows the plan view of the thread wetting element of FIG. 4,
FIG. 6 shows detail X of FIG. 5,
FIG. 7 shows view U of the thread wetting element of FIG. 4,
FIG. 8 shows view V of the thread wetting element of FIG. 4.
DESCRIPTION OF
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Grebing Gerhard
Knoll Helmut
Knoll Volker
Kremers Arnold
Nitschke Gerhard
Akzo Nobel nv
Colaianni Michael P.
Czaja Donald E.
Morris Louis A.
Noto Joseph M.
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