Patent GB-864092-A (GB)
Title: Apparatus for the treatment of textile materials in rope form
Inventor: MANN RALPH JAMES
IPC: D06B3/22
Filed: 1956-11-13
Abstract: <PICT:0864092/IV(c)/1> Apparatus for liquid-treatment of textile fabrics in rope form comprises a bark to contain the treatment liquid, the bark including back, front and side walls and being of substantially rectangular horizontal cross-section, a winch roller positioned near the back of the bark so as to be at least partly submerged in the liquid in the bark and adapted on rotation to lift the rope of fabric up the rear part of the bark and deliver it to a point near the front of the bark, the roller being of substantially cylindrical form and substantially impermeable to flow of liquid through its surface, means below the liquid level and near the front face of the winch roller for injecting liquid in a generally upward direction to ensure separation of the fabric from the roller, and a baffle assembly comprising a generally horizontal first portion across the width of the bark extending forwardly from a point near the winch roller to a point short of the front of the bark, a second portion descending substantially vertically from the rearward end of the first portion, and a third portion descending from the front end of the first portion and curving backwardly to meet the lower end of the second portion.  The means for injecting liquid into the bark may comprise a submerged jet pipe extending horizontally across substantially the whole width of the bark and provided with orifices for emission of liquid; the pipe is positioned close to the winch roller, so that it can direct liquid upwardly towards the fabric on the delivery side of the roller, and may be angularly adjustable about its longitudinal axis.  The space within the baffle assembly is preferably sealed against ingress of liquid from the bark, and the bark desirably becomes progressively deeper from front to back. There may also be provided a liquid conduit inaccessible to a fabric undergoing processing but permitting movement of liquid from a point near the front lower portion of the bark to the rear thereof; a pump adapted to withdraw liquid from the rear portion of the bark (preferably fitted behind a vertical perforated screen close to the rear wall of the bark) and deliver it via a delivery line to the liquid injection means; heating means for the liquid fitted in the delivery line; means for creating a downward movement of liquid at the front of the bark to assist the loading thereof with a length of fabric, said means preferably comprising a second submerged jet pipe extending horizontally across substantially the whole width of the bark and adapted to direct liquid vertically downwards near the front of the bark; guide pegs to prevent entanglement of adjacent ropes of fabric, and a dye box, which may comprise a trough fitted along the upper part of the external surface of the front wall of the bark, communicating therewith by a series of perforations in said front wall.  As shown, a suitable apparatus comprises a bark 1 which may have a length (i.e. distance measured horizontally at right angles to the axis of the winch roller 6) of 3-4 feet and a depth-to-length ratio of 1,5 : 1 to 2 : 1, a winch roller 6, a submerged jet pipe 7, a sealed baffle assembly 8, extending across the width of the bark and joined in liquid-tight manner to the side walls thereof, a series of guide pegs 16 for the fabric ropes 14, and a second, downwardly-directing jet pipe 17.  Liquid is drawn by pump 18 from points 19, behind perforated screen 20, and is supplied to jet pipes 7 and 17.  A steam heater 23 is fitted in the delivery line.  Dyes or other treatment agents may be added to the liquid via receptacle 24 and pipe 25, and the bark may be covered and lagged to reduce heat losses.  A false bottom 21 having sides 22 in its upper portion, forms, with the bottom of the bark 5, a conduit permitting liquid to pass from the front to the rear of the bark.  The rearward end of the false bottom is continuous with the lower end of the vertical perforated screen 20.  The Provisional Specification refers also to the use, in place of the baffle assembly described above, of a vertical baffle, preferably perforated and/or corrugated, placed beneath the winch roller to define, in conjunction with the rear of the bark, a channel for the upward passage of the fabric from the bottom of the bark.  A second baffle may then be fitted towards the front of the bark to define, in conjunction therewith, a channel for downward passage of the fabric.