AN IMPROVED PROCESS AND MACHINERY FOR BLEACHING OR WASHING TEXTILE FABRICS OR MATERIALS
Year: 1862

page_text: PROVISIONAL SPECIFICATION left by Leon Jarasson at the Office of
the Commissioners of Patents, with his Petition, on the 26th August
1862.
I, LEON JARASBON, of La Madelaine, near Lille, Town in the French
Empire, Chemist, do hereby declare the nature of the said Invention for "AN
IMPROVED PROCESS AND MACHINERY FOR BLEACHING OR WASHING TEXTILE FABRICS
OR MATERIALS," to be as follows:-
This Invention consists in bleaching or washing textile fabrics or materials
by means of dry steam and machinery of the following construction:-To a
suitable framing I connect a series of rollers, over and about which the fabrics
are passed; the lowermost rollers are placed in a pan or trough containing
alkali, caustic soda, or carbonate of soda: the several rollers being set in
motion the fabrics are drawn from one roller and pass through the solution in
the pan or trough, thence they pass upwards between pressure rollers, and
finally to a winding-on roller.
The mode of operating with the above apparatus is as follows:-First soak
the fabrics in old wash in any suitable vessel for four to eight hours of the
temperature of from 40° to 50° Centigrade's theremometer, then remove the
fabrics, well wash and squeeze them; having done this, proceed to pass said
fabrics through the machine lastly above described, employing a solution of
caustic soda from 5 to 10 degrees Beaumé of strength, and from 40 to 50
degrees Beaumé of heat; the fabrics should then be removed from this appa-

page_text: ratus and coiled around the tube of the bleaching apparatus before described;
steam of about 8 atmospheres pressure is then admitted into said tube, and
passes through the perforations therein, and permeates the fabrics wound
around same; the fabrics are then removed, and plunged in a large tub
furnished with an agitator, and containing chloride of lime of 1 to 11 degrees
of strength; the fabrics are left therein for 2 or 3 hours, they are then
removed, and without being rinsed are placed in a vessel containing muriatic
acid of one degree Beaumé temperature, and are left immersed for about one
hour; they are then removed and well rinsed and again placed in the bleaching
apparatus, then removed and well washed in a vessel containing about 219
gallons of water heated to about 50 or 60 degrees Beaume, and well mixed
with about 13 lbs. of carbonate of soda and about 11 gallons of chloride of
lime of 4° Beaume; the fabrics are then removed and without being rinsed
are subjected to the following treatment :-The fabrics which have come from
the chloride of soda bath are steeped in muriatic acid of one degree strength,
and heated to 50 or 60 degrees Beaume; by these means the bleaching and
lustre is accomplished. The fabrics should be well washed to remove the acid,
and placed in a soap bath, and finally spread in the open air for about 48
hours to remove the smell of the chloride and acid. In some cases, as, fur
example, when operating upon cotton and linen fabrics or materials, the
pierced tube of the bleaching apparatus may be dispensed with, and the
fabrics be simply rolled up and placed upright in the vat or placed in a heap.
By the above improved process in a few days the same results may be
obtained as formerly required one or more months; great economy of the
bleaching ingredients is also effected.