Thermal measuring and testing – Temperature measurement – Combined with diverse art device
Patent
1988-05-09
1989-10-31
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
Combined with diverse art device
134 64R, 374 59, G01K 1708, G01N 2518
Patent
active
048773328
DESCRIPTION:
BRIEF SUMMARY
When processing fabrics, the fabric webs are to be washed in a washing device, in order to remove therefrom excess chemicals, and in particular, alkaline substances, absorbed therein during processing.
Such a washing device consists of a plurality of washing basins, each being divided into compartments, in each of which a dip roller is arranged, and above said basins and between said dip rollers guiding rollers are provided, all this in such a manner that a continuous fabric web is guided alternately over a guiding roller and below a dip roller, and, thus, can be moved through the successive basins in which the fabric is contacted by washing water. This washing water is supplied to the last compartment of the last basin, is passed towards the preceding compartments and basins, and is, eventually, discharged from the first basin, so that the washing water flows in counter-current in respect of the fabric web. Before the first basin, between the various basins, and after the last basin, said web is moved between squeezing rollers in order to squeeze water therefrom, the water, in the case of the intermediate and last rollers, being returned again to the preceding compartment. Moreover said basins are provided with means for introducing steam into the washing water in order to heat the latter to the desired temperature.
When using such a washing device, there is a tendency to use too much washing water at a too high temperature, so as to ensure that the chemicals are well rinsed from the fabric. This leads to a useless energy and water consumption, also because, as the water is hotter, energy is lost in an increasing degree by evaporation, radiation and conduction. These energy losses might be substantially reduced if the washing effect could be measured in a dependable manner, since, then, it could be determined with which most economical amount of heat and/or water the desired washing effect could be obtained.
In the case of alkaline substances, or, in general, electrolytes such as salts, the conductivity of the wet fabric is a measure for the amount of electrolyte absorbed in the fabric. To that end measuring transducers have been designed, comprising electrodes to be contacted with the fabric, and included in the circuit of a conductivity meter. These measuring transducers have not been satisfactory, since, on the one hand, they influence because of friction the movement of the fabric web, and in particular may give rise to the formation of folds, which, for instance, can considerably interfere with a subsequent colouring or printing operation, and, on the other hand, fibre particles can be scraped from the fabric by said electrodes, which will accumulate on the electrode, and will, thereby, unfavourably influence the measurement result.
The invention provides a transducer means for this purpose which does not show the above-mentioned objections, and which, to that end, is characterised by a measuring roller of insulating material, in which two electrode rings which are mutually separated by an insulating interspace are included, which rings smoothly join the insulating surface of said roller, which roller is rotatably supported in swinging arms or the like, the rotation axis of said roller being provided with slip rings, by means of which the measuring electrodes can be included in the measuring circuit of a conductivity meter, which roller is adapted to be pressed, by means of springs acting on said swinging arms or the like, with a well-determined force against a guiding roller for guiding the fabric web to be examined, which guiding roller is provided with an insulating surface.
Since the measuring roller is uniformly pressed against the guiding roller, and rotates together with said guiding roller when the fabric web is passing, no friction forces giving rise to the formation of folds or the like will be exerted on said fabric web, and accumulation of fabric particles will not take place either, and fabric particles possibly adhering to said measuring roller can be easily removed therefrom during ope
REFERENCES:
patent: 3207125 (1965-09-01), Strandberg, Jr.
patent: 4263920 (1981-04-01), Tasto et al.
patent: 4501504 (1985-02-01), Urmenyi et al.
patent: 4562730 (1986-01-01), Gowman
patent: 4638346 (1987-01-01), Inami et al.
patent: 4714874 (1987-12-01), Morris et al.
Yasich Daniel M.
Yokogawa Electrofact B.V.
LandOfFree
Transducer for determining contaminations in fabrics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transducer for determining contaminations in fabrics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transducer for determining contaminations in fabrics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-622893