US481414A

US481414A - Process of bleaching

Info

Publication number: US481414A
Authority: US
Publication date: 1892-08-23
Anticipated expiration: 1909-08-23

Description

(No'ModeL) J. A MYRI-CK; PROCESS OBBLEAOHING.

Patented Aug. 23, 1892.

wi/ihmwe/a lip WM UNITED STATES PATENT Grates.

JOSEPH A. MYRIOK, or SALISBURY, NORTH CAROLINA.

PROCESS GF BLEACHiNGQ SIEOIFICATION'forming part of Letters Patent No. 481,414, dated August 23,1892. Application filed Aprill, 1892. Serial No. 427,354- (No specimens.)

To all whom it may concern."

Be it known that I, JOSEPH A. Minion, a citizen of the United States, residing at Salisbury, in the county of Rowan and State of North Carolina, have invented certain new and useful Improvements in Processes of Bleaching Cotton Chain \Varp; and I :do hereby declare the following to be a full, clear, and exact description of the inventi0n,.such as will enable others skilled in the art to which it appertains to make-and use the same.

,My present invention relates to the art of bleaching cotton-chain warp and analogous fiber, and hasfor its object certain improvements which will be fully disclosed in the following specification and claims. I For the purpose of illustration I have shown one form-of apparatus for carrying out my invention in the accompanying drawing, which forms part of this specification, and said drawing represents a vertical longitudinal section of such apparatus.

Reference being had to the drawing and the letters thereon, A indicates a tank or trough separated into compartments or baths B, O, D, and E, each of which is provided with rolls a, suitably supported in a frame I), attached to the sides of the tank. to revolve freely as the warp, filling, or fiber F is drawn through the several baths by the drawingrolls G, a pair of which is attached at one end of each bath. The upper roll of each pair is provided with a weight 0 to press the liquid out of the warp as it passes through the rolls and return the same to the bath from which the warp last emerged. After leaving the last or rinsin gbath the warp is passed over a roll or spool H and is then dried. The compartment B contains chloride of lime of a strength of from 1 or 1% to 3 Baum. The second compartment G contains hot water kept at or near the boiling-point to remove the chloride of ii me contained in the warp. The third compartment D contains a solution of sulphurous acid and water (preferably cold water) of a strength of from 1 to 2 B-ium and the fourth compartment E contains pure clear water. Cotton-chain warp, filling, or fiber F to be bleached is drawn through the compartment B, passingback and forth over the rollers a. and through the chloride of lime until it emerges at the surface of the bath or liquid where the initial bleaching effected, when it 'passes between the first pair'of rolls G, which express the liquid from the warp, which falls back into the compartment B. After leaving the rolls the warp is exposed to the compartment C. It is then conducted into the compartment D, passes over the rolls a hack and forth through the weak solution of sulphurous acid, where the bleaching is completed, emerges therefrom at the surface of the liquid, and passes between the third pair of rolls, which express the liquid from the warp, which liquid falls back into the compartment D and the warp exposed to the atmosphere and liquid evaporated from the time it leaves the rolls until it enters the compartment E. The warp is then conducted into compartment E, where it passes back and forth over the rolls a through the pure water, is thoroughly rinsed, and emerges at the surface of the bath. It then passes between the fourth pair of rolls in which the water is expressed from the warp and the warp conducted over the roll or spool H on its way to the dry-' ing apparatus. In the latter compartmentE freshwater is constantly supplied while the operation of bleaching'is carried on, and the impurities derived from rinsing the warp pass off in a thin sheet or film through the overflow-passage (I.

I am aware that a dilutesolution of oxy chloride of calci um and sulphurous-acid vapor has been used for decolorizing straw. This process is slow and-tedious, and I therefore do "oi-lime, expressing the liquid from the fiber presence of two witnesses.

" 2; The process of bleaching cotton-chain acid and again subjecting the fiber to the atwarpor analogous fiber, which consists in mosphere,-and finaiiy'rinsing thefiber.

[O subjecting the'fibei' to a solution of chloride In testimony whereof-leffixmy si gneturein and exposing it'to the'atmosphere, then sub- JOSEPH A. MYRICK. jecting the fiber to hot-water and expressing Witnesses: the water, then subjecting the fiber to a weak D. O. REINOHL,

solution of sulphurousacid, expressing said H. B. REITQHL