US2070679A - Process for preparing nonmetallic articles for electro-plating - Google Patents

Process for preparing nonmetallic articles for electro-plating Download PDF

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Publication number
US2070679A
US2070679A US738540A US73854034A US2070679A US 2070679 A US2070679 A US 2070679A US 738540 A US738540 A US 738540A US 73854034 A US73854034 A US 73854034A US 2070679 A US2070679 A US 2070679A
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Prior art keywords
copper
electro
articles
plating
preparing
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US738540A
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Pebock Rudolf
Bergstein Kurt
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/54Electroplating of non-metallic surfaces
    • C25D5/56Electroplating of non-metallic surfaces of plastics

Definitions

  • the invention relates to a process for preparing for electro-plating solid non-metallic bodies, especially those made of compressed materials, such as artificial resin and similar substances, by
  • This process has the disadvantage that the ar- 15 ticle rendered conductive by the layer of metal powder receives in the non-galvanic copper bath an extremely thin coat of copper which does not adhere to the base substance and which will not withstand the mechanical stresses imposed by 2:) polishing or grinding while at the same time this coating of copper does not form aneifective base for the subsequent treatment in alkali baths.
  • An electrically conductive layer of metal powder which has a lower potential than copper is applied to a non-metallic article by means of a 40 suitable varnish such'as a copal or other resin varnish, the surface of the article being roughened or similarly treated in known manner.
  • the article'so treated is immersed in an acid copper, bath which acts as a binding bath without the use 45 of an electric current acting from without, in order to coat it with a closely adhering thin copper skin which ensures a uniform distribution of the current in a subsequent electro-deposition operation for the formation of a second film of copper.
  • the copper skin completely covers the electrically conductive article it is advantageous to select as the electrically conductive layer a metallic powder the colour of which differs sufllciently from the colour of the copper such for example as an alloy of lead and zinc.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Description

Patented Feb. 16, 1937 UNITED STATES PROCESS FOR PREPARING NONMETALLIC ARTICLES FOR ELECTm-PLATING Rudolf Pebiick and Kurt mm, Berlin, Germany No Drawing. Application August 4. 1934, Serial No. 738,540. In Germany August 7, 1933 2 Claims.
The invention relates to a process for preparing for electro-plating solid non-metallic bodies, especially those made of compressed materials, such as artificial resin and similar substances, by
5 preliminary coppering in the cold.
It has been proposed to prepare in the cold non-metallic articles to be electro-plated by first applying to the article by means of a resin varnish a layer of metal which is electrically conduc- 10 tive and then immersing the article so treated in a non-galvanic copper bath (coppering by immersion), the actual electro-deposition (such as nickeling, silvering etc.) following.
This process has the disadvantage that the ar- 15 ticle rendered conductive by the layer of metal powder receives in the non-galvanic copper bath an extremely thin coat of copper which does not adhere to the base substance and which will not withstand the mechanical stresses imposed by 2:) polishing or grinding while at the same time this coating of copper does not form aneifective base for the subsequent treatment in alkali baths.
It has furthermore been proposed to produce non-metallic articles suitable for the actual elec- 25 tro-deposition treatment by rendering them electrically conductive by means of a solution of copper bronze and celluloid lacquer, and then immersing the articles into a galvanic acid copper bath. It has been found, however, that the ad 30 hesiveness of the coatings so produced is not perfect and particularly that it is not possible to polish these coatings without the coating dissolving, at least in part.
These disadvantages are avoided according to the inventionby effecting the preliminary coppering in the following manner. 1
An electrically conductive layer of metal powder which has a lower potential than copper is applied to a non-metallic article by means of a 40 suitable varnish such'as a copal or other resin varnish, the surface of the article being roughened or similarly treated in known manner. The article'so treated is immersed in an acid copper, bath which acts as a binding bath without the use 45 of an electric current acting from without, in order to coat it with a closely adhering thin copper skin which ensures a uniform distribution of the current in a subsequent electro-deposition operation for the formation of a second film of copper.
'fhisgalvaniccopperingproceedsinflmumal manner, that is to say the article leaving the binding bath is placed in a galvanic acid copper bath in the manner usual in the manufacture of electrotype plates. Following this electrotype coppering operation, which advantageously lasts for from one to two hours and by means of which a base, which can be mechanically treated, is applied to the article, there is carried out the usual improving operation, namely nickeling, silvering, etc. 10
In order to be certain that the copper skin completely covers the electrically conductive article it is advantageous to select as the electrically conductive layer a metallic powder the colour of which differs sufllciently from the colour of the copper such for example as an alloy of lead and zinc.
We claim:
1. The process for preparing moulded articles of artificial resin for electro-plating which consists in roughening the external surfaces of the articles, applying to the roughened surfaces by means of a varnish a thin electrically conductive layer of a metal alloy powder containing lead and a metal of a potential lower than copper g5 and of a color differing from that of copper, immerging the articles in a first acid copper bath, removing them from said first acid copper bath after the formation of a thin copper skin on their surfaces, placing them in a second acid copper 'bath, and applying an electric current for electrolytic deposition of a copper layer on the copper skin formed in the first acid copper bath.
2. The process for preparing non-metallic articles for electro-plating which consists in rough- 5 ening the external surfaces of the articles, applying to the roughened surfaces by means of a varnish a thin electrically conductive layer of a metal alloy powder containing lead and a metal of a potential lower than copper and of a color 40 differing from that of copper, immersing the articles in a first acid copper bath, removing them from said first acid copper bath after the formation of a thin copper skin on their surfaces,
placing them in a second acid copper bath, and
applying an electric current for electrolytic deposition of a copper layer on the copper skin formed in the first acid copper bath.
RUDOLF PEBOCK.
KURT
US738540A 1933-08-07 1934-08-04 Process for preparing nonmetallic articles for electro-plating Expired - Lifetime US2070679A (en)

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DE2070679X 1933-08-07

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FR (1) FR762653A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310390A (en) * 1962-03-27 1967-03-21 Corning Glass Works Electrically conductive abrasive bodies
EP0097656A1 (en) * 1982-01-04 1984-01-11 General Electric Company Electroplated augmentative replacement processed conductors and manufacture thereof
US6825418B1 (en) 2000-05-16 2004-11-30 Wpfy, Inc. Indicia-coded electrical cable
US6906264B1 (en) 2004-06-17 2005-06-14 Southwire Company Color-coded armored cable
US20090095398A1 (en) * 2007-10-11 2009-04-16 Hardin William K Method and system for applying labels to armored cable and the like
US20100101821A1 (en) * 2008-10-24 2010-04-29 Southwire Company Metal-clad cable with foraminous coded label
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US9409668B1 (en) 2007-06-04 2016-08-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US11031157B1 (en) 2013-08-23 2021-06-08 Southwire Company, Llc System and method of printing indicia onto armored cable
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310390A (en) * 1962-03-27 1967-03-21 Corning Glass Works Electrically conductive abrasive bodies
EP0097656A1 (en) * 1982-01-04 1984-01-11 General Electric Company Electroplated augmentative replacement processed conductors and manufacture thereof
EP0097656A4 (en) * 1982-01-04 1986-05-14 Gen Electric Electroplated augmentative replacement processed conductors and manufacture thereof.
US8278554B2 (en) 2000-05-16 2012-10-02 Wpfy, Inc. Indicia-coded electrical cable
US6825418B1 (en) 2000-05-16 2004-11-30 Wpfy, Inc. Indicia-coded electrical cable
US20050016754A1 (en) * 2000-05-16 2005-01-27 Wpfy, Inc., A Delaware Corporation Indicia-marked electrical cable
US7465878B2 (en) 2000-05-16 2008-12-16 Wpfy, Inc. Indicia-marked electrical cable
US20090084575A1 (en) * 2000-05-16 2009-04-02 Dollins James C Indicia-Marked Electrical Cable
US6906264B1 (en) 2004-06-17 2005-06-14 Southwire Company Color-coded armored cable
US11827409B1 (en) 2007-06-04 2023-11-28 Encore Wire Corporation Method and apparatus for applying labels to cable
US11247404B1 (en) 2007-06-04 2022-02-15 Encore Wire Corporation Method and apparatus for applying labels to cable
US10272616B1 (en) 2007-06-04 2019-04-30 Encore Wire Corporation Method and apparatus for applying labels to cable
US10046879B1 (en) 2007-06-04 2018-08-14 Encore Wire Corporation Method and apparatus for applying labels to cable
US10759558B1 (en) 2007-06-04 2020-09-01 Encore Wire Corporation Method and apparatus for applying labels to cable
US9452856B1 (en) 2007-06-04 2016-09-27 Encore Wire Corporation Method and apparatus for applying labels to cable
US9409668B1 (en) 2007-06-04 2016-08-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US11667085B1 (en) 2007-06-04 2023-06-06 Encore Wire Corporation Method and apparatus for applying labels to cable
US11498715B1 (en) 2007-06-04 2022-11-15 Encore Wire Corporation Method and apparatus for applying labels to cable
US8540836B1 (en) 2007-10-11 2013-09-24 Southwire Corporation Method for applying coded labels to cable
US9070308B2 (en) 2007-10-11 2015-06-30 Southwire Company, Llc Labeled armored electrical cable
US20090095398A1 (en) * 2007-10-11 2009-04-16 Hardin William K Method and system for applying labels to armored cable and the like
US8347533B2 (en) 2007-10-11 2013-01-08 Southwire Company Machine applied labels to armored cable
US7812259B2 (en) 2008-10-24 2010-10-12 Southwire Company Metal-clad cable with foraminous coded label
US8344254B2 (en) 2008-10-24 2013-01-01 Southwire Company Electrical cable with foraminous label
US20100101821A1 (en) * 2008-10-24 2010-04-29 Southwire Company Metal-clad cable with foraminous coded label
US20110017489A1 (en) * 2008-10-24 2011-01-27 Agan Benny E Electrical cable with foraminous label
US9321548B1 (en) 2009-01-30 2016-04-26 Encore Wire Corporation Method for applying labels to cable or conduit
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US10654607B1 (en) 2009-01-30 2020-05-19 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US9950826B1 (en) 2009-01-30 2018-04-24 Encore Wire Corporation Method for applying labels to cable or conduit
US10906685B1 (en) 2009-01-30 2021-02-02 Encore Wire Corporation Method for applying labels to cable or conduit
US12091207B1 (en) 2009-01-30 2024-09-17 Encore Wire Corporation Method for applying labels to cable or conduit
US9446877B1 (en) 2009-01-30 2016-09-20 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US10035618B1 (en) 2009-01-30 2018-07-31 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US11851233B1 (en) 2009-01-30 2023-12-26 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US8454785B1 (en) 2009-01-30 2013-06-04 Encore Wire Corporation Method for applying labels to cable or conduit
US11673702B1 (en) 2009-01-30 2023-06-13 Encore Wire Corporation Method for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US11670438B2 (en) 2013-08-23 2023-06-06 Southwire Company, Llc System and method of printing indicia onto armored cable
US11031157B1 (en) 2013-08-23 2021-06-08 Southwire Company, Llc System and method of printing indicia onto armored cable

Also Published As

Publication number Publication date
FR762653A (en) 1934-04-16

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