Patent GB-191222248-A (GB)
Title: Improvements in and relating to Machinery Employed in Mercerising Cotton Piece Goods and the like.
Inventor: CRAVEN WILLIAM THOMAS
IPC: D06B7/08
Filed: 1912-09-30
Granted: 1913-09-30
Abstract: 22,248. Craven, W. T., Craven, L. J., Young, C. H., Cliffe, F. H., and Cliffe, W. S. Sept.30. Passing materials through fluid-supplying apparatus; zigzag-roller type.-A mercerizing- range for cotton piece goods comprises a number of elastic-surfaced nip or tension-rollers, and iron or like guide-rollers which are partly immersed in caustic, wash, or other like liquors, practically all the rollers being in successive contact, and some of the rollers being arranged in sets of three and peripherally corrugated. At the end of the first wash-tank there are arranged also two large tension cylinders. The machine is designed to take one, two, or more drafts, and by the arrangement of the rollers, to dispense with pins and clips. The cotton web A to be treated passes first over the usual tensioning and broadening arrangements 1, 2, and then under a guide-roller 3 to a series of rollers 4, 5, which are power-driven through suitable bevelgear. The lower or guide rollers 5, partly immersed in a caustic soda bath in a tank 7, are preferably of cast iron, while the upper or nip rollers 4 have india-rubber or other suitable elastic peripheries 12 and are provided with a regulable screw-pressure arrangement 14. The first nip-roller 4 rests upon the first guide roller 5, while the others are placed each between two guide rollers, the web remaining in contact with rollers over all its area. Over the last nip roller 4 and under an iron pressure roller 18 the web A passes to a similar range of iron rollers 5<A>, and elastic-surfaced nip rollers 4<A> in a steam-heated washing-tank 16, a number of hot-water sprays 17 being provided to play on the web at the first few lines of nip. To give lateral stretching, several of the rollers 4<A>, 5<A> are provided with corrugations or annular grooves 19, such rollers being so arranged in sets of three, preferably two sets, that the convexities of one set are opposite the concavities of the next, comparing corresponding rollers. An intermediate guide-roller 20 ensures that the web shall travel with the same face touching the two corrugated nip rollers 4<A>, the cloth preferably passing under these and over the guide-rollers 5<A>, in contradistinction to the case with the other guide and nip rollers. On leaving the corrugated rollers, the web passes under a guide-roller 21, over and under two large tension cylinders 22, 23, having roughened surfaces, which take up any slack and help the traverse, and then between another pair of nip and guide-rollers 4<B>, 5<B> and a guide-roller 25 to a compartment 26 of a third tank 27, containing water, wherein it passes zigzag fashion over preferably iron guide-rollers 28. The web then passes through nip and guide-rollers 4<C>, 5<C> to a similar compartment 29 containing an acid bath, the guide-rollers 30 being preferably of wood. The web finally passes to a similar clean-water compartment 31, also provided with wooden rollers 32, through nip and guide-rollers 4<D>, 5<D>, a water spray 34 playing into the nip. Moisture is squeezed out by a last pair of nip and guide-rollers 4E, 5<E> before the web is pleated down as usual. The last two guiderollers 5<D>, 5<E> are preferably covered with ebonite.