Method for continuous drying of a cloth and an apparatus therefor

Claim 1

A method of continuously drying a cloth comprising transporting the cloth through a cloth passage defined by a pair of endless net conveyers arranged one above the other in parallel, drying the cloth using high pressure dry hot air and jetting the dry hot air from nozzles against the cloth, arranging the nozzles extending transversely of the direction of movement of the cloth through the cloth passage on opposite sides of the cloth and offset relative to one another so that the nozzles are disposed above and below the cloth passage in a zigzag manner, and driving the two conveyers so that the combination of the movement of the cloth and the jetting action of the dry hot air effects beating and vibrating of the cloth as the cloth passes through the cloth passage in a snaky state under no tension for drying of the cloth, dividing the cloth passage into at least three separate chambers arranged one after the other in the direction of movement of the cloth and drying the cloth in the first chamber at about 150° C., drying the cloth in the second chamber at about 100° C., and drying the cloth in the third chamber at about 70° C., prior to said drying process, with the cloth in a ropy state, moving the cloth generally horizontally and untwisting the cloth in the ropy state by jetting high pressure air against the cloth from below, and then expanding the cloth by jetting high pressure air against the cloth zigzag from above and below from nozzles extending transversely of the direction of movement of the cloth.

Claim 2

A method of continuously drying a cloth comprising transporting the cloth through a cloth passage defined by a pair of endless net conveyers arranged one above the other in parallel, drying the cloth using high pressure dry hot air and jetting the dry hot air from nozzles against the cloth, arranging the nozzles extending transversely of the direction of movement of the cloth through the cloth passage on opposite sides of the cloth and offset relative to one another so that the nozzles are disposed above and below the cloth passage in a zigzag manner, and driving the two conveyers so that the combination of the movement of the cloth and the jetting action of the dry hot air effects beating and vibrating of the cloth as the cloth passes through the cloth passage in a snaky state under no tension for drying of the cloth, dividing the cloth passage into at least three separate chambers arranged one after the other in the direction of movement of the cloth and drying the cloth in the first chamber at about 150° C., drying the cloth in the second chamber at about 100° C., and drying the cloth in the third chamber at about 70° C., prior to said drying process, with the cloth in a ropy state, moving the cloth generally horizontally and untwisting the cloth in the ropy state by jetting high pressure air against the cloth from below, and then expanding the cloth by jetting high pressure air against the cloth zigzag from above and below from nozzles extending transversely of the direction of movement of the cloth.

Claim 5

An apparatus for continuously drying a cloth comprising a drying chamber, a pair of endless net conveyers located within said drying chamber and arranged horizontally and in parallel one above the other and forming a gap therebetween serving a cloth passage, a plurality of jet nozzles above and below said net conveyers defining said cloth passage with said jet nozzles extending transversely of the direction of movement of the cloth through the cloth passage and with the nozzles above and below the cloth passage offset relative to one another providing a zigzag arrangement so as to jet high pressure air against the cloth, a plurality of partitions located within said drying chamber and extending transversely of the direction of movement of the cloth through said chamber and dividing said chamber into a number of subchambers, said partitions having openings therethrough for passing said net conveyers and the cloth therethrough, and supplying high pressure dry hot air to said nozzles in each of said subchambers for drying the cloth in the first subchamber as the cloth enters said drying chamber at a temperature of about 150° C. in the next subchamber at a temperature of 100° C. and in the following subchamber at a temperature of 70° C. for lowering the temperature in a stepwise manner as the cloth passes through said drying chamber, an endless net conveyer located upstream from said net conveyers passing through said drying chamber, the upstream said net conveyer being arranged to transport a ropy cloth to said drying chamber, the upstream said net conveyer comprising three parts, a first part for untwisting the cloth, a second part for expanding the cloth, and a third part for drying the cloth, another endless conveyer provided between the upstream said net conveyer and said drying chamber and said another endless net conveyer located above the upstream said net conveyer for a downstream portion thereof with said another net conveyer located above the part of said upstream conveyer for expanding the cloth and for drying the cloth and forming a gap with said parts serving as a cloth passage passing to said drying chamber, and a plurality of jet nozzles arranged above and below the cloth passage between the upstream said net conveyer and said another net conveyer with said jet nozzles extending transversely across the direction of movement of the cloth through the cloth pressure and arranged offset relative to one another above and below the cloth passage for providing a zigzag arrangement of said nozzles for jetting high pressure air to the cloth passing through the cloth passage.

Claim 6

An apparatus for continuously drying a cloth comprising a drying chamber, a pair of endless net conveyers located within said drying chamber and arranged horizontally and in parallel one above the other and forming a gap therebetween serving a cloth passage, a plurality of jet nozzles above and below said net conveyers defining said cloth passage with said jet nozzles extending transversely of the direction of movement of the cloth through the cloth passage and with the nozzles above and below the cloth passage offset relative to one another providing a zigzag arrangement so as to jet high pressure air against the cloth, a plurality of partitions located within said drying chamber and extending transversely of the direction of movement of the cloth through said chamber and dividing said chamber into a number of subchambers, said partitions having openings therethrough for passing said net conveyers and the cloth therethrough, and supplying high pressure dry hot air to said nozzles in each of said subchambers for drying the cloth in the first subchamber as the cloth enters said drying chamber at a temperature of about 150° C. in the next subchamber at a temperature of 100° C. and in the following subchamber at a temperature of 70° C. for lowering the temperature in a stepwise manner as the cloth passes through said drying chamber, an endless net conveyer located upstream from said net conveyers passing through said drying chamber, the upstream said net conveyer being arranged to transport a ropy cloth to said drying chamber, the upstream said net conveyer comprising three parts, a first part for untwisting the cloth, a second part for expanding the cloth, and a third part for drying the cloth, another endless conveyer provided between the upstream said net conveyer and said drying chamber and said another endless net conveyer located above the upstream said net conveyer for a downstream portion thereof with said another net conveyer located above the part of said upstream conveyer for expanding the cloth and for drying the cloth and forming a gap with said parts serving as a cloth passage passing to said drying chamber, and a plurality of jet nozzles arranged above and below the cloth passage between the upstream said net conveyer and said another net conveyer with said jet nozzles extending transversely across the direction of movement of the cloth through the cloth pressure and arranged offset relative to one another above and below the cloth passage for providing a zigzag arrangement of said nozzles for jetting high pressure air to the cloth passing through the cloth passage.