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Volume 2, Issue 1
Displaying 1-12 of 12 articles from this issue
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Kazuo Mihira1956 Volume 2 Issue 1 Pages 1-9
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSIn the following article the author describes, from a statistical viewpoint, three methods of analyzing the irregularity of drafting by evenness of sliver: (1) the method of curve analysis of evenness by utilizing the “time series” theory, (2) the method of obtaining the variation-length curve of long-term irregularity of sliver by using the “stochastic process”, and (3) the method of obtaining the variation-length curve of short-term irregularity by utilizing “probability.”
Inter-relations among these methods are also explained.View full abstractDownload PDF (782K) -
Tomonobu Manabe1956 Volume 2 Issue 1 Pages 10-19
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSFrom studies on the movement of position, in space, of a fiber, of which yarn is constructed, in the process of single and plied yarn twisting, a theory of twist structure has been developed. On the basis of this theory, theories of twist shrinkage, breaking strength, twist moment and stiffness in twisting of twisted yarns are developed. Experiments have been made with rayon tire yarns and rayon tire cords, and the results, theoretical and experimental, agree fairly well.View full abstractDownload PDF (990K) -
Masataka Yamaguchi1956 Volume 2 Issue 1 Pages 20-26
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThis article gives a brief description of a method of evaluating the evenness of yarn. Consideration is given to the effects of roller distance, roller weighting, twists and draft. The method described here gives good results for practical use, and these results coincide fairly well with those obtained by exprience.View full abstractDownload PDF (535K) -
Takeo Yamagishi, Eikichi Koyama, Hideo Kuroe1956 Volume 2 Issue 1 Pages 27-31
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThis article deals with slub yarn which is manufactured on a spinning frame having a mechanism to speed up or slow down its roller speed from time to time. The authors theoretically discuss what happens to roller drafting when a roller speed is changed from time to time. They go on to clarify, on simple assumptions, that the formation of the slub portion occurs somewhat later than the change in the roller speed. The correlation among such factors as the size and length of slub portion, the staple fiber length of fed sliver, and the duration of speed-change in the roller has been experimentally computed. Various characteristics of the slub portion, such as the distribution of its twist, its quantitative distribution, its strength and elongation have been experimentally computed.View full abstractDownload PDF (533K) -
Kiyohisa Fujino, Akira Horikawa1956 Volume 2 Issue 1 Pages 32-38
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThis article gives the results of theoretical studies made by the authors on the expanding mechanism of the bend-bar type roller expander. These studies have made it possible to figure out the state of contact of cloth with the roller, the tension on the cloth, the longitudinal relaxation of the cloth caused by imperfect contact of cloth and roller, and expanding capacity - on a single as well as a triple roller expander. Our studies have disclosed many other facts which we believe will be an effective aid in the manufacture and use of the bend-bar type roller expander.View full abstractDownload PDF (620K) -
Akira Ikeda, Haruo Sanuki, Takeshi Iwakata1956 Volume 2 Issue 1 Pages 39-44
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThe authors have made studies to determine what relation there is between the degree of heating and frangibility of the rag in the carbonizing process in actual woollen spinning operations.
In other words, we have tried to determine whether the degradation of the cotton rag is due to the concentration of the acid or to the action of hot air in the carbonizing process.
We have experimented with various degrees of concentration of the acid, various rates of squeezing, various lengths of time and temperatures for treatment. Our experiments have shown that the process of degradation, which is due to dispolymerization caused by hydrolysis, is an important factor contributory to the reaction of the initial stage in the carbonizing mechanism.
Our experiments have shown, too, that the difference in the state and location of the rag during heating change the effects of treatment. We have found also that, where a pile of rags is treated, the degree of degradation and of the change of color differs to no small extent according to the relative positions of the individual rags in the pile.
It would be wrong to judge the degree of degradation by the change of color in the carbonizing process, because the change of color is due in very large measure to esterification.View full abstractDownload PDF (562K) -
Syuichi Ichino, Shinya Kurosaki, Goro Tsuchikawa, Shoichi Kozakai1956 Volume 2 Issue 1 Pages 44-45
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSWe experimentally discuss the distribution of points where the speed of every fiber changes from the surface speed of the back roller to that of the front roller in the roller draft field. The term “fiber” as used here means the fiber tip. When the ratch widens, the center of the distribution shifts from the side of the front roller towards the back roller, and the range of distribution windens. The variation of draft ratio and of the roller speed is unrelated to distribution.View full abstractDownload PDF (182K) -
Hisashi Kamogawa1956 Volume 2 Issue 1 Pages 46-49
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThis analysis agrees with experimental results more accurately than do conventional theories. This analysis is obtained by replacing both the stick and the side lever as an equivalent spring and an equivalent mass in the under picking mechanism.View full abstractDownload PDF (269K) -
Tokio Uematu, Takesi Kano, Kazuhiro Takizawa, Masami Matuura1956 Volume 2 Issue 1 Pages 49-50
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThis article deals with the deposition efficiency of droplets in the air flow past a circular cylinder or a flat plate. At first, theoretical formulas are introduced. Experimentally, some chalk, pith of Japan globe flowers and blotting paper have been used as the solid. They are exposed to the flow for 10_??_180 seconds, after which the quantity of deposited droplets on the surface of the solid have been measured from the increase in their weight after the exposure. The experimental data nearly agree with the theoretical values within the limits of the errors of measurement.View full abstractDownload PDF (158K) -
Yasushi Niitsu, Meiji Kurahashi1956 Volume 2 Issue 1 Pages 51-57
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThe following article contains the results of experiments by the authors with two methods of obtaining uniform duct-system distribution of air flow from each branch pipe or of adjusting air flow to specific conditions-without changing the existing duct system.
Method No. 1 starts with the fundamental flow equation and proceeds by stages to finding out unknown factors to be controlled.
Method No. 2, which cannot be described in the scope of this preface, has been shown by the experiments to be simpler and more practical.
As to the duct system with parallel blowers, the authors have reached the conclusion that uniform flow from each branch pipe can be obtained more easily by adjusting the revolutions of blowers than by inserting the control resistance body.View full abstractDownload PDF (466K) -
Toshio Shoman1956 Volume 2 Issue 1 Pages 58-60
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSIn the following article the author describes a hygrometric slide rule used to calculate the relative humidity from the wet and dry bulb temperatures which are given in the calm air.View full abstractDownload PDF (193K) -
Tsunejiro Sakanoue1956 Volume 2 Issue 1 Pages 61-66
Published: 1956
Released on J-STAGE: July 08, 2008
JOURNAL FREE ACCESSThe F. S. Type Ever-Cleaner, a continuous-cleaning-device attached to the carding engine, has been designed and developed to improve quality and increase the yield of carding by preventing or reducing neps and by keeping slivers uniform. Use of this device has shown that the yield is increased by 0.6_??_1.0% and that even after a long, continuous operation of the carding engine, neps do not increase but remain practically uniform, while unevenness of slivers is far smaller than before operation. Similar results are obtained not only for cotton but also for wool and other synthetic fibers.View full abstractDownload PDF (537K)
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