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Method for continuous drying of a cloth and an apparatus therefor
| Details |
Inventors: Sando, Yoshikazu; Ishidoshiro, Hiroshi;
Assignee: Sando Iron Works (Wakayama, JP)
Primary Examiner: Schwartz; Larry I.
Assistant Examiner:
Attorney, Agent or Firm: Toren, McGeady & Stanger
For continuously drying a cloth, the cloth is subjected to a drying process in which high pressure dry hot air is jetted against the cloth in a zigzag pattern from both sides thereof while transporting the cloth continuously through a cloth passage. The cloth passage is a gap formed between a pair of horizontally extending parallel endless net conveyors located one above the other. In accordance with the rotation of the two conveyors the cloth is vigorously beat and vibrated as it passes through the gap in a snaky state under no tension to afford drying of the cloth. When the drying process is effected by stepwise lowering the temperature of the cloth, or is repeated by cooling the heated cloth in the open atmosphere, the drying resembles natural drying, preventing the cloth from becoming fragile, and moreover, in particular heat energy is saved. A cloth in a ropy state can also be dried satisfactorily and effectively by inserting a cloth untwisting process and a cloth expanding process prior to drying. The cloth is dried continuously and effectively in a short time, and the dried cloth has an excellent touch feeling with appropriate stretchability and shrinkability as well as bulkiness. |
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DETAILED DESCRIPTION The present invention is done in view of such circumstances.
The object of the invention is to develop a method of continuously drying a cloth under no tension (shrink drying) to obtain an excellent touch feeling of the dried cloth.
Another object of the invention is to provide a continuous drying apparatus for a cloth, which is simple in its construction and with which a cloth can be dried in a short time to save heat energy.
The essential point of the invention comprises subjecting a cloth to be dried to a drying process in a drying chamber, in which high pressure hot air is jetted against the cloth in a zigzag pattern from both sides while continuously transporting the cloth through a cloth passage, formed by a gap between a pair of horizontally extending parallel endless net conveyers spaced one above the other.
As the two conveyers move they beat and vibrate the cloth that the cloth passes through the gap in a snaky state under no tension.
Since the cloth travel in a snaky state through the cloth passage under no tension while receiving a strong jetting force of high pressure hot air from both sides, the cloth is continuously dried effectively in a short time.
It is preferable that the drying process is done by lowering the temperature of the cloth stepwise, or the drying process is repeated by putting a process to cool the heated cloth in the open atmosphere therebetween.
Drying proceeds similarly to natural drying, preventing that the cloth from becoming fragile, and moreover, the heat energy can be saved.
Thus, the cloth obtained by using this invention has an excellent touch feeling, with appropriate stretchability and shrinkability as well as bulkiness.
When a cloth to be treated is in a ropy state, which occur in removing washing water from the cloth by using a centrifugal separator, the cloth is subjected successively to a process to untwist the cloth so as to render the cloth easily expandable and to another process to expand the cloth by jetting high pressure air against the cloth, prior to the drying process
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Manufacturing Materials 
