US844304A - Method of coating lace with metal. - Google Patents

Description

- T e effect of this application of potassium and allowed to partially dry but before the or extend through a number of points on the number of suchv connections is to have the alloy capable of electrodeposition may be deposited on the lace in the usual way." I

men.

METHOD OF com-me. LACE WITH METAL.

No. season Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed Ootoberlfi, 1901. Renewed December 5, 1904. Serial No. 236.548.

To all whom it may concern:

Be it known that I, JOHN ANDRE DALY, residing at Washington, District of Columbia, have invented certain new and useful Im rovements in Method of Coating Lace Wit Metal, of which the following is a specification. i V

.This invention relates to a method of coatinglace or similar knitted, netted, or woven fibrous or textile open-Work material with metal. t

The object of the invention is to cover or electroplate the finest laces and gauzy fabrics with a metal of uniform thickness.

In the preparation the lace is stretched on a frame, as is the case for many other urposes. I then cover the fibers of the ace with a thin, even coating of shellac. This may be applied with a brush to both faces of the lace. The shellac-is thorou hly dried and serves to stiffen-the lace. en the stretched lace is dry, the surface is covered with an aqueous solution of nitrate of silver sliver .nitrate has thoroughly hardened the surface is again painted or covered by an a ueous solution of' sulfid of potassium.

sulfid is to decompose the nitrate of silver, the roducts of. such decomposition being sulfid of silver and nitrate of potassium. The lace is now washed in water, which removes the soluble nitrate of potassium, leaving the lace covered with a coati of sulfid of silver, which is a conductor of e ectrieity. Thiscoating of sulfid of silver is comparetively inertand will not destroy the fiber of the lace by its caustic properties. The lace so prepared is then connected with a number of thin copper wires; which wires lead to surface of the lace.' -.l he object ofhaving a electrodeposit begin a number of places and spread rapidly,.so as to save time and also to give a substantially uniform coating of electrodeposited metal. The lace so coated and wired is then suspended by the wires or otherwise in a platl bath, and electrical connections are ma e with the wires and bath, so that an electrodeposit of metal maytake lace on the surface of the iace, the sulfid 0. silver serving as a conductor for the electrodeposit. Any metal or maining. It is then washed. The lace' is then spread or stretched out and brushed over on both sides with a scratch brush to bind the crystalline metal of the deposit more firmly together and to the fibers or threads of the lace. The brushing down with a scratch-brush compacts the metal on the threads, serving to exclude acids during the subsequent treatment. After the metal is .compacted by the scratch-brush no further Wiring is required than the usual wire or metalhc connections such as are usual in electroplating. When so connected and again immersed in a plating-bath, the electord'eposit of metal may be continued tothe desired thickness. c v When it' is' desired to retain the lace in flexible condition, the first step of coating H the lace with shellac is dispensed with. The

.nitrate of silver is applied directly. tothe lace.

Heretofore a conductor has sometimes been made by'treatment of lace with nitrate of silver. This material is so caustic that it sometimes destroys-the fine fibers or threads I of'the' lace and renders the coarser threads and masses ofthe lace weak and easily broken,"like"charred wood; I By neutralizing I the. caustic properties of the nitrate almost immediatel this defectis avoided, and the strength 0 [the lace-is substantially pre served."

preliminarydeposit in the bath, the "basic metal is made. stronger and finer, and a better finished-as well as a stronger article of metal-, a

lized lace results.

What I claim ise-f The method (if-team 1a.. with metal,

fying this preliminary deposit on the threads by mechanical action, en adding further e ectrodeposited metal.

The method of coating lace with metal.

solution of "sulfid of potassiiim, then wash-' aid electrotie which consists treating the lace vvith a solution of nitrate'of silver,"'then vvith a solu tion of sulfid of potassium, thus securing a conducting coating, then depositing a preliminary metallic coating thereon in an electroplating-hath, then removing from the bath, com acting the metal on the lace by mechanicai means, and de ositing further metal thereon in an electropihting-bath.

The method "of coating 'Iace with metal whichconsists in stretching the lace on a frame, covering the th'reeds of the'lace With a thin varnish to stiffen the same, then coverihg the varnished threads with a solution of nitrate of silver, then applying an aqueous ing with water, then making" Wire connec- 'tions With a nnlnher Ofpoints on the lace,

' ositing a metalthereon.

p 4. The met od 01' covering threads of lace with metal, which consists in stretching the lace" on a frame, then"covering' the threads orvveb'fof lace' with an aqueous solutionof nitrate of silver, then with an aqueous solutionof siilfid of potassium, then washing with water, then making an electrodep'osit on the labs in an electroplating-bath. v

v l The'method of covering lace Withme'tal, which consists in stretching the lace on a frame, securing a' 'c ondi1ctor on the lace, connesting conducting-wires to the lace at n'umerous'po'ints', and depositing metal mijsaid lace and condnctor'in an electroplating-hath. 6. The method of -coatingfibrous la'ce with 'pointsto metallic Wire conductors,

metal, which consists in holding the mesh of the-liaise extended, dVIi-Ii the threads of the lace by a coating of sulfid of silver, conheating the 'threadsof'lace to copper conducting-wires at numerous points, making a preliminary deposit of copper thereon, then removing the conducting-wires and after- "ward increasing the copper deposit. a

7. The methqd of covering fibrous lace with metal, which consistsnfholdin the mesh ofthe la'cein extended position, developing 'an'electrical conductor on the threakls o the lace, connecting "the web 'at numerous making a. preliminary electrodeposit on thethr'eads of lace, then removing the metallic wireconductors and"subsequent1y electrodepositing additional metal on'the'lace.

' '8. The methodpf coatin "lace withmetal, V

which consists in holding the. mesh of'the lace in extended position, securing; a conductor on the surfaceof the la'ce'hy" covering": it

first with a solutionof nitrate *of silveraind then with an alkaline reagent, conhe'ttingthe mesh of the extended "lace at various-points to: conducting-wires of a plating-Battery',1and' lace.

two 'vvitnesses.

' In testlmony'ivhereoi I'affiX-my signature 7 60. i electrodepositing metal on the threads of the I