US3616447A - Apparatus for suspending a body in a corrosive solution - Google Patents

Apparatus for suspending a body in a corrosive solution Download PDF

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Publication number
US3616447A
US3616447A US792508*A US3616447DA US3616447A US 3616447 A US3616447 A US 3616447A US 3616447D A US3616447D A US 3616447DA US 3616447 A US3616447 A US 3616447A
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US
United States
Prior art keywords
fixture
shaft
cup
roller
rod
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
US792508*A
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English (en)
Inventor
John W Hayford
William M Tucker
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3616447A publication Critical patent/US3616447A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated

Definitions

  • the present invention relates to an anodizing and plating apparatus. More particularly this invention relates to a fixture which protects the shafts of a body from contact by the electrolyte utilized in such an apparatus and into which the body is submerged.
  • the roller is the anode of the electrical circuit, and the anodizing bath (the electrolyte) tends to dissolve the shaft metal (typically steel or stainless steel) causing pitting or etching of the shaft surface and making the shafts less suitable for rotatably supporting the roller in the equipment in which it is ultimately to be used.
  • the anodizing bath the electrolyte
  • the shaft metal typically steel or stainless steel
  • the roller In a plating bath the roller is a cathode in the electrical circuitand the plating solution tends to plate out the metal onto the roller shaft causing metallic deposits on the shaft surface. Some corrosive plating baths will also pit and otherwise corrode the shaft surface. In either case the shaft is less suitable for rotatably supporting the roller.
  • a corrosive-resistant coating is then placed over the area of the shaft to be protected while allowing the wire or strip to pass therethrough.
  • the coating is usually an organic corrosion-resistant paint.
  • layers of corrosion-resistant paint and a corrosion-resistant tape are built up over the area to be protected.
  • the technique is time consuming and, unless extreme care is taken in applying the coating, the technique does not always result in a completely leakproof cover. Furthermore, once the roll is plated or anodized, the coating is stripped off and discarded because it cannot be used again.
  • the fixture embodying the present invention protects the shafts of a body from contact by an electrolyte while providing an electrical path between the body and an electric circuit.
  • the fixture may be readily incorporated into an anodizing or plating apparatus and includes a cup member for encasing a shaft and a sealing means disposed on the outer periphery of the shaft between the cup rim and the roll body for preventing flow of the electrolyte onto the encased shaft.
  • the fixture further includes means which extend through the wall of the cup for engaging the shaft to hold the cup rim in operative engagement with the sealing means and for completing an electrical path between the fixture and the roller. Further means are included for connecting the cup member to the suspending means.
  • the holding and completing means includes a threaded hole in the cup wall and a bolt threadedly mounted in the hole and extending into engagement with the shaft.
  • the cup member, the holding and completing means and the connecting means are formed from an aluminum alloy and are covered with a corrosion-resistant coatmg.
  • the holding and completing means includes a hole fonned in the wall portion of the cup member and an elongated guide tube positioned in contact with the cup over the hole so that the base of the tube is in alignment with the hole.
  • the tube has a thread portion in the base at the end opposite the end of the tube in contact with the cup member.
  • An elongated screw rod is threadedly positioned in the tube base with one end in contact with the roller shafi.
  • the screw rod and guide tube are of sufficient length so that when the roller is submerged in the electrolyte, the threaded end of the guide tube is above the surface of the electrolyte.
  • FIG. I is a sectional view of the fixture of the present invention engaging a shaft.
  • FIG. 2 is a perspective view of the fixture.
  • FIG. 3 i'sa side view of an anodizing tank in which the fixture of FIGS. 1 and 2 has been incorporated.
  • the elements of the preferred embodiment of the present invention are a cup member 10, shaft seals 14, screw bracket 18, a guide tube 22, screw rod 26, a bracket rod 30, and a hook member 34.
  • the cup member 10 is a cylindrical sleeve having one end open and the opposite end capped off so that the sleeve can he slipped over the end of the shaft S as shown in FIG. I.
  • a guide tube 22 is radially disposed from the cup wall 12.
  • a hole 16 is formed in the cup wall 12 and the bore 24 of the guide tube 22 is positioned in alignment over the hole 16 in the cup 10.
  • the guide tube 22 is welded or otherwise suitably attached to the cup 10.
  • the screw rod 26 is an elongated rod which is positioned in the bore 24 of the guide tube 22 and has a knob 28 attached to one end. A portion of the rod adjacent the knob 28 is threaded 29.
  • the threads 29 in the screw rod 26 correspond to threads in the bore 31 of a screw bracket 18 which is attached to the end of the guide tube 22.
  • a bracket rod 30 extends from the guide tube 22 and has a hook member 34 disposed from its free end as shown in the figures.
  • the hook member 34 is used to support a roller R on a work rod 36 as shown in FIG. 3.
  • FIGS. 1 and 2 show the arrangement of the fixture for installing on one end of a roller. A mirror image of the fixture in FIGS. 1 and 2 is made for installation on the opposite end of the roller.
  • the screw rod 26 serves a twofold purpose; the first is to hold the cup lip ll in engagement with the ring 14 to prevent fluid from leaking inside the cup when the roller is submerged in the fluid; the second is to press the cup into good electrical contact with the shaft of the roller R.
  • the inside diameter of the cup is dimensioned to have a close slip fit onto the shaft so that the cup is held in uniform contact with the shaft to make a good electrical connection.
  • the cup 10 is also dimensioned sufficiently long enough so that it can be used to protect a variety of shaft lengths of a given shaft diameter.
  • FIG. 3 shows an arrangement of an anodizing tank 37 in which the preferred embodiment of the present invention is especially useful.
  • the tank 37 is fabricated from a typical corrosion-resistant material and is filled with a typical anodizing acid up to the indicated level 38.
  • the cathode 40 is disposed near the bottom of the tank and is connected to an electrical power source 42 of typical design.
  • At the top of the tank is mounted the work rod 36.
  • the work rod 36 is positioned across the tank 37 and is properly insulated therefrom because the work rod is also connected to the power source 42 and is part of the electrical circuit.
  • a roller R is suspended in the tank 37 from the work rod 36 by means of the fixture in which the present invention is embodied.
  • the book members 34 are in physical contact with the work rod 36 and the electrical current flows from the power source 42 through the work rod 36 through the fixture of the present invention and into the roller
  • the screw rod 26 is made from a metal (such as aluminum) which is softer than the steel roller shaft S so that when the rod is tightened, it will not scar or damage the shaft surface.
  • the entire fixture of the preferred embodiment of the present invention is fabricated from a suitable aluminum alloy which may be coated with a suitable corrosion-resistant coating such as a vinyl plastisol.
  • the guide tube 22 and screw rod 26 are made to a sufficient length so that the fixtures can suspend rollers of various diameters from the work rod while allowing the screw knob 28 of the screw rod 26 to remain above the electrolyte surface.
  • the guide tube and screw rod be properly sealed and fabricated so that the guide tube and knob could be submerged.
  • the method of loading and suspending a roller having the present fixtures attached thereto depends upon the size and weight of the rollers. Small, light rollers can be loaded on the work rod by hand. If large heavier rollers are being anodized, the work rod may have to be eliminated and the present fixture will be used to suspend a roller from other types of support means such as overhead cranes, etc. Of course, suitable arrangements would have to be made to provide electrical power to the fixture and to insulate the support equipment from that electrical power.
  • the present fixture is readily adaptable to a modification of the use described above.
  • a collar could first he slipped on the shaft and held in place by setscrews.
  • the "0 ring would be slipped over the shaft, and the fixture would then be placed on the shafi to compress the "O" ring between the collar and the cup rim.
  • the fixture can be used in longer shafts or shafts where it is desirable only to protect the end portion thereof.
  • the sealing means is positioned adjacent the cup rim between the cup and the shaft.
  • the seal is mounted in a groove formed in the interior surface of the cup wall.
  • a fixture for suspending a body having at least one shaft in an electrolyte contained in a tank comprising, a cup member having a wall portion adapted to encase the shaft, sealing means associated with said cup member for preventing the flow of electrolyte onto said cup member, means defining a hole in said wall portion, an elongated guide tube having a first and a second end and a bore formed longitudinally therethrough, the first end of said tube positioned so that the bore is in alignment with said hole, said bore having a threaded portion at the end corresponding to the second end of said guide rod, an elongated screw rod having a contact end and a knob end, and positioned in said bore, said screw rod having a threaded portion adjacent the knob end for threading with the threaded portion of said bore to hold the contact end of said screw rod into engagement with a shaft in said cup member, said screw rod and guide rod being of sufiicient length so that when a body is submerged in said electrolyte the second end of said guide bore and

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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)
US792508*A 1969-01-21 1969-01-21 Apparatus for suspending a body in a corrosive solution Expired - Lifetime US3616447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79250869A 1969-01-21 1969-01-21

Publications (1)

Publication Number Publication Date
US3616447A true US3616447A (en) 1971-10-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
US792508*A Expired - Lifetime US3616447A (en) 1969-01-21 1969-01-21 Apparatus for suspending a body in a corrosive solution

Country Status (2)

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US (1) US3616447A (fr)
BE (1) BE744620A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128657A1 (fr) * 1983-05-11 1984-12-19 Think Laboratory Co., Ltd. Appareillage permettant le montage et démontage automatique d'un rouleau creux du type cassette muni d'un arbre
WO2005028718A2 (fr) 2003-09-04 2005-03-31 Atotech Deutschland Gmbh Systeme d'alimentation en courant dans un dispositif de traitement electrochimique
ITBO20110257A1 (it) * 2011-05-09 2012-11-10 Roberto Zini Apparato, particolarmente per trattamenti di galvanoplastica, galvanostegia, e simili

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128657A1 (fr) * 1983-05-11 1984-12-19 Think Laboratory Co., Ltd. Appareillage permettant le montage et démontage automatique d'un rouleau creux du type cassette muni d'un arbre
WO2005028718A2 (fr) 2003-09-04 2005-03-31 Atotech Deutschland Gmbh Systeme d'alimentation en courant dans un dispositif de traitement electrochimique
WO2005028718A3 (fr) * 2003-09-04 2005-06-09 Atotech Deutschland Gmbh Systeme d'alimentation en courant dans un dispositif de traitement electrochimique
US20070039816A1 (en) * 2003-09-04 2007-02-22 Britta Scheller Power supply device in a device for electrochemical treatment
US7815777B2 (en) 2003-09-04 2010-10-19 Atotech Deutschland Gmbh Power supply device in a device for electrochemical treatment
CN1839221B (zh) * 2003-09-04 2011-12-21 埃托特克德国有限公司 用于电化学处理的设备中的电源设备
KR101120048B1 (ko) * 2003-09-04 2012-03-23 아토테크 도이칠란드 게엠베하 전자화학적 처리 장치용 전기 공급장치
ITBO20110257A1 (it) * 2011-05-09 2012-11-10 Roberto Zini Apparato, particolarmente per trattamenti di galvanoplastica, galvanostegia, e simili

Also Published As

Publication number Publication date
BE744620A (fr) 1970-07-01

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