US3152977A - Roll for marking metal strip - Google Patents

Roll for marking metal strip Download PDF

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Publication number
US3152977A
US3152977A US74496A US7449660A US3152977A US 3152977 A US3152977 A US 3152977A US 74496 A US74496 A US 74496A US 7449660 A US7449660 A US 7449660A US 3152977 A US3152977 A US 3152977A
Authority
US
United States
Prior art keywords
roll
marking
sleeve
strip
metal strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US74496A
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English (en)
Inventor
George A Bartholomew
Richard F Higgs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL272336D priority Critical patent/NL272336A/xx
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US74496A priority patent/US3152977A/en
Priority to GB43543/61A priority patent/GB951347A/en
Priority to DEU8518A priority patent/DE1226390B/de
Priority to FR881474A priority patent/FR1311512A/fr
Application granted granted Critical
Publication of US3152977A publication Critical patent/US3152977A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/14—Etching locally

Definitions

  • the present invention relates generally to the marking of continuous metal strip and has as its primary object the provision of an improved roll for effecting electrolytic etching of markings on continuous steel strip.
  • markings on electrolytic tin plate is necessary for the purpose of identifying the tin plate as to its origin, type, quality, etc. before and after fabricationinto finished products. To be effective it is necessary for such marking to fulfill certain minimum requirements. For example, the marking should not affect lacquerability; the marking should be resistant to subsequent steriliZation processing conditions; and the marking should be durable so that it is detectable on the fabricated tin plate product after at least three years. None of the methods and apparatuses developed for marking tin' plate prior to our invention have been fully satisfactory.
  • metal sheet and strip may be processed continuously and controllably by electrolytic means prior to tinning to achieve marking that will be visible after tinning. plish this by continuously etching a predetermined pattern on the surface of rapidly moving metal strip by contacting the traveling strip with a perforated, electrolyte-carrying, electrically charged roll.
  • the roll is covered with a sleeve of plastic or other electrically insulating or non-conductive materialcontaining holes arranged in the pattern to be etched on the strip. Rings of felt Wick material are provided under the insulating sleeve in circumferential grooves spaced axially along the exterior of the roll which communicate with the perforations in the roll face.
  • the felt wick rings carry the electrolyte from the perforations of the roll to the insulating sleeve.
  • the roll is connected in'an electrolytic circuit with a DC. generator, a conductor roll and the strip itself. in this circuit the roll functions as the cath- Thus,
  • a continuous and repetitive pattern may be electrotrolytically tinned in the usual manner.
  • the marking is etched into thebase metal by our method, it may be made to be visible'without the necessity of removing a subsequently applied tin coating,
  • the marking will not be obliterated by subsequent lacquering of the tin plate or sterilization proc- Since the marking is etched into the base metal it will be visible even after partial corrosion of the base metal has occurred and, therefore, will be visible for many years under normal conditions.
  • FIGURE 1 is a schematic elevational view of the entrance end of an electrolytic'tinning line having the mark- FIGURE 2 is an end view looking at the entrance end of an electrolytic tinning line having the marking roll of fthe invention installed therein;
  • FIGURE 3 is a longitudinalsectional view of the marking roll of the invention.
  • FIGURE 4 is a cross-sectional view taken on the line IV-IV of FIGURE 3;
  • FIGURE 5 is an enlarged detail partial view of FIG- URE 3.
  • FIGURE 6 is a cross-sectional view taken on the line VIVI 0f FIGURE 5.
  • FIGURE 1 schematically shows the entrance end of an electrolytic tinning line having the markingroll of the invention installed therein.
  • Reference numeral 2 designates the pickling tank of the line which contains a solution of sulphuric acid.
  • a conductor roll 4 is journaled above the tank 2 and a sink roll 6 is rotatably mounted inside the tank.
  • the marking roll of the invention is rotatably mounted above the tank 2 adjacent the conductor roll 4.
  • a pulley 16 may be provided on the shaft of the marking roll whereby detailed disclosure and the appended claim when read inv I connection with the accompanying drawings in which:
  • the marking roll can be driven by means of a V-belt drive 12 connected to 'a motor (not shown).
  • V-belt drive 12 connected to 'a motor (not shown).
  • strip S to be tinned is passed around the conductor roll 4, into the tank 2, around the sink'roll 6 and then out of the tank 2, around the marking roll 8 and then back into the tank to complete the pickling operation.
  • the strip is rinsed and then electrolytically tinned in a conventional manner.
  • the marking roll 8 comprises a shaft 16 having a hollow cylindrical roll body 18 mounted coaxially thereon.
  • a perforated stiffener plate 19 may be provided on the interior of the roll body 18 welded to its interior wall for purposes of maintaining rigidity of the roll body.
  • a longitudinally extending passageway 29 is provided in one end of shaft 16 having a radially directed opening 22 communicating with the interior of the hollow roll body.
  • the opposite end of shaft 16 is provided with a similar longitudinally extending passageway 24 having a radially directed opening 26 also communicating with the interior of the roll body 18.
  • the shaft 16 is connected with a piping system 28 by means of rotary joints 30 at each end of the shaft.
  • the piping system 28 includes a feed line 3?. extending from a reservoir tank 3410 the end of the shaft 16 containing passageway 20.
  • a return line 36 of the system 28 extends from the end of the shaft 16 containing the passageway 24.
  • a pump 38 in the feed-line 32 feeds electrolyte in the form of sulphuric acid of approximately 6.5%
  • the face of the hollow cylindrical roll body 18 is provided with perforations 40 which communicate with the interior of the roll body.
  • External circumferential grooves 42 are formed in the face of the roll body and are spaced axially therealong communicating with the perforations 4%
  • a ring 44 offelt wick material is disposed in each of the grooves 42 for a purpose which will become apparent.
  • a perforated sleeve 46 of non-conducting electrically insulating material is disposed around the roll body 18.
  • the sleeve 46 may be made of plastic such as Teflon or similar material.
  • the perforations 47 in the sleeve 46 each communicate with one or the other of the felt Wick rings 44 and are arranged in a predetermined pattern so as to form a particular mark or code.
  • electrolyte is pumped from the reservoir 'tank 34 through the feed line 32 and passageway 20 into the hollow roll body 18 where it is temporarily and continuous'ly stored under pressure. Then, when the roll 8 revolves as the strip S is passing thereover a portion of the electrolyte stored in the roll passes through the perforated face of the roll 'body 18 into the circumferential grooves 42 and, by virtue of capillarity, centrifugal force, and hydrostatic pressure, permeates the felt Wick rings 44 and wets the peripheral surfaces thereof. The electrolyte then passes into the perforations 47 of the sleeve 46 which, upon revolution of the roll body 18, continually contacts the surface of strips and etchesit according to the pattern formed by the holesinthe sleeve.
  • the electrolyte may be causedto fiow intothe roll body continuously or intermittently "as desired.
  • the apparatus of the invention can be operated to produce a mark satisfactorily without continuously circulating acid through the marking roll. Satisfactory marking can be achieved even though the acid is not circulated through the marking roll until it is necessary to do so'to clear the holes in the plastic sleeve, for example, after every 24 hours of operation.
  • the felt wick rings 44 under the non-conductor sleeve 46 do not touch the strip; instead they merely serve as wicks for feeding electrolyte to the holes 47 in the sleeve, which remain 'full of electrolyte (and thus are capable of conducting current) because of capillary action.
  • An electrolytic circuit for carrying out the method of our invention may 'be providedin a conventional manner such as by passing an electrolytic current from a DC. generator 43 through brushes 50 to a collector ring 52 on the conductor roll 4. The current then passes along the strips into the sulphuric acid solution in the pickling tank 2 and then to the marking roll 8 where electrolysis occurs and the strip surface is etched as it .passes over the holes 4.7 in the sleeve 46,. The current then flows out of the marking roll through a collector ring 54. and brushes 56 attached thereto back to the generator.
  • the strip S is anodic and the marking roll 8 is cathodic.
  • the intensity of the marking may be varied at will by suitable manipulation of the current density and the line speed.
  • the acid in the pickling tank can be used as hollow roll body mounted coaxially on said shaft, said roll body having closed ends and being'perforated around its circumference, said passageway having an inlet opening adjacent one end and an outlet opening adjacent its opposite end, each of said openings communicating with the interior of said body, said roll body having external circumferential grooves spaced axially therealong communicating with the perforations therein, a ring of felt wick material disposed in each of saidgrooves, a perforated sleeve of electrically insulating material around said body, the sleeve perforations being arranged in the pattern of said mark, each of the sleeve perforations communicating with one of said rings of felt wick material whereby electrolyte is conducted from said rings to said metal strip in traveling contact with the roll, the circumferential area of said roll body between said grooves being free of felt wick material and in direct cont-act with the inner surface of said sleeve whereby a bond is created between said

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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)
US74496A 1960-12-08 1960-12-08 Roll for marking metal strip Expired - Lifetime US3152977A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL272336D NL272336A (de) 1960-12-08
US74496A US3152977A (en) 1960-12-08 1960-12-08 Roll for marking metal strip
GB43543/61A GB951347A (en) 1960-12-08 1961-12-05 Method of and apparatus for marking metal strip
DEU8518A DE1226390B (de) 1960-12-08 1961-12-06 Vorrichtung zum einseitigen, kontinuierlichen elektrolytischen Markieren von Metallbaendern
FR881474A FR1311512A (fr) 1960-12-08 1961-12-08 Procédé et appareil pour le marquage d'une bande de métal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74496A US3152977A (en) 1960-12-08 1960-12-08 Roll for marking metal strip

Publications (1)

Publication Number Publication Date
US3152977A true US3152977A (en) 1964-10-13

Family

ID=22119861

Family Applications (1)

Application Number Title Priority Date Filing Date
US74496A Expired - Lifetime US3152977A (en) 1960-12-08 1960-12-08 Roll for marking metal strip

Country Status (4)

Country Link
US (1) US3152977A (de)
DE (1) DE1226390B (de)
GB (1) GB951347A (de)
NL (1) NL272336A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306011A (en) * 1964-05-28 1967-02-28 Dvorkin Harry Air filter for inflatable tires
US3374159A (en) * 1965-02-09 1968-03-19 Bethlehem Steel Corp Marking of steel strip electrolytically using electrolyte adhering to the strip
US3410782A (en) * 1965-09-28 1968-11-12 Pryor Edward & Son Electrolytic etching apparatus
US3541083A (en) * 1968-02-21 1970-11-17 United States Steel Corp Electrolytic strip-marking roll
US3819502A (en) * 1971-05-25 1974-06-25 Meco Metal Finishing Eng Nv Line- and spotplating machine
US3850605A (en) * 1971-09-17 1974-11-26 Pilkington Brothers Ltd Manufacture of patterned glass

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB176064A (en) * 1920-11-03 1922-03-03 William Turton Apparatus for the electro-deposition of metals
GB400510A (en) * 1933-03-25 1933-10-26 Alfred Ernest Newey Improvements in or relating to means for electro-plating
US2080234A (en) * 1934-04-13 1937-05-11 Schlotter Max Anode for electroplating by hand
GB483503A (en) * 1936-10-28 1938-04-21 Crosse & Blackwell Ltd Improvements in marking metal articles
US2266347A (en) * 1938-06-25 1941-12-16 Charles G Watson Electroplating contact roll
CA457040A (en) * 1949-05-31 Carnegie-Illinois Steel Corporation Conductor roll
US2498129A (en) * 1945-11-28 1950-02-21 Allen R Lindsay Electrical etching device
US2498124A (en) * 1945-07-20 1950-02-21 George E Holmes Fuse plug
US2540602A (en) * 1946-07-03 1951-02-06 Lockheed Aircraft Corp Method and apparatus for the surface treatment of metals
US2689215A (en) * 1949-07-13 1954-09-14 Siegfried G Bart Method and apparatus for plating pipe
US2798849A (en) * 1954-09-20 1957-07-09 Allen R Lindsay Electrolytic marking device
US2833702A (en) * 1954-03-22 1958-05-06 Quod Bonum Nv Method for the manufacture of a metal relief printing plate
US2848401A (en) * 1953-05-07 1958-08-19 Olin Mathieson Method of electrolytically rifling gun barrels
US2921893A (en) * 1957-08-01 1960-01-19 Nat Steel Corp Electrolytic apparatus including an improved roll
US2924563A (en) * 1954-08-19 1960-02-09 Pittsburgh Plate Glass Co Continuous electroplating apparatus
US2967813A (en) * 1958-08-29 1961-01-10 Allen R Lindsay Automatic marking device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2876176A (en) * 1956-01-25 1959-03-03 Inland Steel Co Marking or dulling of tin plate

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA457040A (en) * 1949-05-31 Carnegie-Illinois Steel Corporation Conductor roll
GB176064A (en) * 1920-11-03 1922-03-03 William Turton Apparatus for the electro-deposition of metals
GB400510A (en) * 1933-03-25 1933-10-26 Alfred Ernest Newey Improvements in or relating to means for electro-plating
US2080234A (en) * 1934-04-13 1937-05-11 Schlotter Max Anode for electroplating by hand
GB483503A (en) * 1936-10-28 1938-04-21 Crosse & Blackwell Ltd Improvements in marking metal articles
US2266347A (en) * 1938-06-25 1941-12-16 Charles G Watson Electroplating contact roll
US2498124A (en) * 1945-07-20 1950-02-21 George E Holmes Fuse plug
US2498129A (en) * 1945-11-28 1950-02-21 Allen R Lindsay Electrical etching device
US2540602A (en) * 1946-07-03 1951-02-06 Lockheed Aircraft Corp Method and apparatus for the surface treatment of metals
US2689215A (en) * 1949-07-13 1954-09-14 Siegfried G Bart Method and apparatus for plating pipe
US2848401A (en) * 1953-05-07 1958-08-19 Olin Mathieson Method of electrolytically rifling gun barrels
US2833702A (en) * 1954-03-22 1958-05-06 Quod Bonum Nv Method for the manufacture of a metal relief printing plate
US2924563A (en) * 1954-08-19 1960-02-09 Pittsburgh Plate Glass Co Continuous electroplating apparatus
US2798849A (en) * 1954-09-20 1957-07-09 Allen R Lindsay Electrolytic marking device
US2921893A (en) * 1957-08-01 1960-01-19 Nat Steel Corp Electrolytic apparatus including an improved roll
US2967813A (en) * 1958-08-29 1961-01-10 Allen R Lindsay Automatic marking device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306011A (en) * 1964-05-28 1967-02-28 Dvorkin Harry Air filter for inflatable tires
US3374159A (en) * 1965-02-09 1968-03-19 Bethlehem Steel Corp Marking of steel strip electrolytically using electrolyte adhering to the strip
US3410782A (en) * 1965-09-28 1968-11-12 Pryor Edward & Son Electrolytic etching apparatus
US3541083A (en) * 1968-02-21 1970-11-17 United States Steel Corp Electrolytic strip-marking roll
US3819502A (en) * 1971-05-25 1974-06-25 Meco Metal Finishing Eng Nv Line- and spotplating machine
US3850605A (en) * 1971-09-17 1974-11-26 Pilkington Brothers Ltd Manufacture of patterned glass

Also Published As

Publication number Publication date
DE1226390B (de) 1966-10-06
GB951347A (en) 1964-03-04
NL272336A (de)

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