US1136522A - Scraper for galvanizing-pots. - Google Patents

Description

J. A. HANLON.

SCRAPER FOR GALVANIZING POTS. APPLICATION FILED SEPT. 18. 1912.

l lfififiggn Patented Apr. 20, 191.5.

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PENNSYLVANIA, 'ASSIGNOB. 'ro Eamon-enema? GALVG COMPANY, OF PITTSBURGH, PENNSYLVANIA, A. CORBOTION @F rnnnsnvnma.

To all whomz't may concern:

Be it known that I, JOHN A. HANLON, a resident of Pittsbu' h, in the county of Allegheny and State Pennsylvania, have invented a new and useful Improvement in Scrapers for Galvanizing-Pots, of which the following is a specification. v v

This invention relatesto apparatus for coating strips or sheets of steel or iron with metal, and particularly to a scraping or wiping device for removing the surplus coating metal.

The object is to produce simple and eifec tive apparatus for scraping ofi or removing from the strip or sheet the superfluous coating "metal and dross and pressing the remaining coating metal into the pores of the base metal to leave a thin closely adhering coat which will' not crack or peel ofi' when the sheet or strip is bent.

In the accompanying drawings Figure 1' is a longitudinal section through a coating tank or kettle with my improved scraping device therein; Fig. 2 is a plan view of the scraping device; Fig. 3 is a transverse section taken on the line 33, Fig. 2, looking in the direction of the arrows, one of the levers being shown in dotted lines in raised position; Fig. 4 is a longitudinal section on the line 4r4:, Fig. 2; and Fig. 5 is an enlarged longitudinal section on the line 5-5, Fig. 2.

In the drawings, 1 indicates a suitable metal kettle or tank mounted in a setting 2 and containing the spelter or other molten coating metal 3, all as is usual in the art of coating with metal. Located in the kettle or tank near one end thereof is a transverse support for the scrapin device, said support comprising a bar having upwardly turned end portions 4* shown as secured to the side walls bf the tank or kettle but which may be supported on the settin 2 or in any suitable way.

he scraping device comprises a metal frame composed of two side members 5 and transverse members 8, 8 suitably secured to the side members. The forward ends of the side members are providedwith-downwardly bent hooks 6 to engage the supporting bar at, while their rear ends form handles 7'by means of which the scrapin device can be lifted out of the pot and p aced in position therein. The supporting bar 4 is preferably 10- Specificafion of Letters Patent.

shown at A, Fig. 3, it can semen ron GALVANIZING-POTS.

;rear of the transverse bars being offset upwardly, as at 19, with their rear ends or handles 7 resting on the setting'2.

The scraping devices are supported on the transverse members 8, 8 and in the drawings four sets of scraping devicesare" shown, two on'each side of central line of the device and one pair in advance of the other, so that each strip or sheet being coated is subjected to the-action of two scraping devices. All of the scraping devices are alike so that a description of one suffices.

Each scraping device comprises a bottom blade or scraper 13 carried by a plate 12 secured to the transverse members 8, 8 and a cooperating upper blade or scraper 14= carried by a ever 15 pivotally connected at its inner end at 11 to theupper end of a screw 11 engaging a threaded hole in the horizontal portion of "an angle bracket 9 secured .to a transverse. member 8 or 8*.at its longitudinal center. The scrapers or blades 13 and Mare, suitably secured to their supports so as'to be rigid therewith and removable therefrom and eachtpairis of suiiicient length to permit the passage of a plurality of strips 20 being coated. These scrapers or blades are preferably formed of rolled steel having either flat or slightly rounded edge portions between Patented Apr. 2t), 1215. npl lication filed September is, 1912. SerialNo. 721,079;

the longitudinal which the strips or sheets being coated are drawn. The vertically adjustable pivot member 11 provides a suitable means for keeping the edges of the'scraping blades in parallelism irrespective of the thickness of the strips or sheets passing therebetween. By lifting the lever to 'vertlcal position, as

be readily rotated' to either elevate or lower the pivot 11, and adjust the scrapers to the thickness of the sheet or strip being coated.. The outer ends of the levers 15 are offset upwardly to pass over the side .walls of the kettle or tank and form lever arms 16 for the application to the scrapers of the necessary pressure to remove the surplus coating metal and press the remainder into the pores of the metal. This pressure may be applied either by hand or by weight, as indicated at 17, attached to a hole 17 in the outer end of said lever arms. The lever arms are guided vertically between spaced vertical guide. members 18 secured to the.

frame side members 5 and to the transverse members 8 and 8.

In the use of the apparatus,.the scraping device is placed in position in the pot and strips or sheets of metal 20 to be coated are led from suitable rolls or reels through the pot and through the two tandem pairsof scrapers to a suitable winding or other traction mechanism. The device is intended particularly for coating long strips of metal, such as hoop or band iron or the like, which in use must be bent and which should be capable of being bent at a sharp angle without cracking, crazing or peeling the coating metal. The drawings show three strips 20,

such as hoop or band iron, passing through each pair of scrapers, but obviously, t e scraping device can be made of such size as to accommodate any desired number of strips 6r sheets. After the strips or sheets are passed through the scraping device and connected, .to asuitable winding or other traction device, weight is applled to the handle levers v16 of the upper scrapmg blades to press them down upon the strips with sufiicient force to remove the surplus coating metal and dross from. both sides of the. strips and thin and spread the remain ing coating metal and force it into the pores of the strip. The formation of the edges of thescraping blades and the pressure applied to the scrapers is such as to form a very th n unbroken coating of metal on the strip or heat and which very tenaciously adheres thereto so that it will not crack or peel when the strip is bent even to sharp angles. e blades are of such formation as to prevent excessive coating metal from passing through them and that which is scraped off drops back into the tank or kettle. The first set of scrapers takes off the major portion of the excess coating metal, leaving merely a thin film, while the succeeding scraper further reduces this film, spreads and compacts the same'and forces it into the pores of the metal so that a very firm physical bond is formed between the base metal';and the coating.

' While round edged scrapers may be used and will accomplish the desired results with some degree of success, I prefer to use scrapers or blades having substantially square or flat scraping edges, as shown in cross section inFig.4=.' V 0 The devicedescribed is simple and inexpensive and results in a considerable saving in the amount of metal necessary to secure a good protecting coat for the strip or sheet. It can be operated at a high speed, as its action is not limited by the ability of the movable wiping member. v

in'connectlon with sides forcing the coating metal 7 into pores of the base metal to form a more .umform and tenacious coating.

What I claim is 1, Wiping apparatus for use in galvanizing strips, comprising a frame, afixed wiping member secured therein and adapted-to wipe over one surface of the strip, acoiipe ating wiping member for the other surface of the strip and movable toward and from said fixed wiping, member, a lever arranged to swing in a vertical plane and carrying said movable wiping member, and a threaded pivot member carried by the frame .with its axis vertical and supporting said lever, said pivot member being threaded into the frame and adjustable vertically therein,-

whereby said wiping members may be adjusted relatively to each other.

- 2. Apparatus for us i in connection ing a fixed wiping member, avertically movable wiping member cooperating with' said fixed wiping member, a pivot. member threaded into said frame on a vertical axis and adjustable yertically therein, and a lever' pivotally connected tosaid pivot member on. ahorizontalaxis and carrying said "Apparatus for use galvanizing pots, comprisinga frame having side members each: terminating at one end in a hook and at its opposite end formmg a handle, cross bars connecting said side frame members, fixed wiping members carried by said cross bars, and movable wiping members pivotallyfconnected to said crossbars and coiipe'r'ating with said fixed wiping members.

' 4. Wiping apparatus for use ingalvanizing strips, comprising a portable frameadapted to be supported over the galvanizing tank, cross members on said frame spaced apart horizontallyand each carrying a fixed wiping member, and levers pivoted in said frame and carrying cotiperating wiping members, said levers being independently adjustable in a vertical, direction to vary the distance between cQapemting wiping members of each pair.

5. Wiping apparatus for use in galvanizing strips, comprising a frame adapted to be supported over the galvanizing tank, said frame including a cross member carrying a plurality of fixed wiping members, a pair of levers pivoted at or near the middle of. said frame and extending in oppositedirec-' tions laterally thereof, each lever carrying a movable wiping member for coiiperating with one of said fixed wiping members, and threaded members for independently adj 11stingsaid levers vertically to vary the distance between said wiping members, said 16- vers extending in one direction only from the threaded members.

6., Wiping apparatus for use in galvanizing strips, comprising a frame adapted to be supported over the galvanizing tank, said frame including a cross member carrying a fixed wiping member, a lever carrying a movable wiping member for coiiperation with said fixed Wiping member, a support to which said lever is pivotally connected, said support being threaded into and vertically adjustable in said frame, and vertical guides for said lever, said guides being free of connection at their upper ends and adapted to permit said lever to be raised and turned on a vertical axis to adjust the wiping members relatively to each other.

In testimony whereof, I have hereunto set my hand.

JOHN A. HANLON. Witnesses:

ELBERT L. HYDE, J; L. ITIEFALLER, Jr.

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