US2293378A

US2293378A - Device for holding metallic strip in contact with conductor rolls

Info

Publication number: US2293378A
Application number: US270709A
Authority: US
Inventors: William S Allen; Howard G Bargfeldt
Original assignee: CARNEGIE HLINOIS STEEL CORP
Current assignee: CARNEGIE HLINOIS STEEL CORP; CARNEGIE-HLINOIS STEEL Corp
Priority date: 1939-04-28
Filing date: 1939-04-28
Publication date: 1942-08-18
Anticipated expiration: 1959-08-18

Description

Aug. 18, 1942. SLALLEN EI'AL DEVICE FOR HOLDING METALLIC STRIP IN CONTACT WITH CONDUCTOR ROLLS Filed April 28, 1939 lnuenlors: Maw/n5 4445 4nd 4180 4 flea/220x I Patented Aug.'18, 1942 umrso sTA'r Es PATEN T'I-OFFICE DEVICE FOR-HOLDING METALLIC srmr m oou'rao'r wrrn ooNnUc'roa ROLLS William s. Allen, Pittsburgh, Pa, and Howard G.

Bargteldt, Gary, ImL, assignors to Carnegie- Illinois Steel Corporation, a corporation oi New Jersey Application April 28; 191 .9, Serial No. 210,109

' 1 Claim. 101. 204-206) which the pass line of the strip becomes tangen to the conductor roll.

' Other ob,ects and advantages will becomesapparent. as the description proceeds and reference may be efficiently transferred between the com A,

strip passing. over the conductor roll and applies the desired pressure at the point of contact, which pressure can be regulated as desired by the turnbuckle arrangement ii. In the position shown,.the eccentric i2 is a trifle past the center line, thereby locking said hold-down roll in position. When the hand lever 16 is rotated to contact the stop I'I, the hold-down roll-6 is mbved away. from the strip material by reason :0! the rotation of the eccentrics within their. cooperating eccentric straps. This permits the ready threading of the metallic strip over the conductor roll.

Under such a construction, quick release of the hold-down roll is possible and such release will not afiect the amount of pressure applied when is had to the accompanying drawing, in .which:

Figure 1 is a side elevation of the present invention; and, 1

Figure 2 is a section on line 11-11 of Figure 1. In the drawing, the conductor roll 2 is shown as being supported by bearing brackets 3 which are fastened to supporting members 4 secured to beams 5 forming a part of a supporting frame (not-shown). V Metallic strip S is indicated as passing over the conductor roll 2. Since it is desired that electrical energybe transferred to the strip from said conductor roll in the most eflicient manner, there are provided rubber covered hold-down rolls 6... These hold-down rolls are so positioned that they can, by means of the mechanism to be subsequently described, be used to apply pressure to the metallic strip at the point at which the pass line of the strip is approximately tangent to the periphery of said conductor roll. This point of contact is chosen since it has been determined that most of the transfer of the electric energy takes place in this vicinity.

The hold-down rolls 6 are mounted on shafts I carried by bearings of conventional design. The bearings are supported by arms 8 pivotally connectedvto a cross member 9 which is secured to the beams 5. Extending between the arms g supporting each hold-down roll is a shaft I0. Mounted on each end of said shaft III is an the hold-down roll is again brought into engagement with the strip. By providing such a holddown arrangement, damage to the surface of the metallic strip caused by arcing is eliminated.

This is of particular importance in continuous electroplating processes; for example, in the continuous electroplatingof steel strip, since it ultimately results in defects in the coating applied to the strip.- a

While we have shown and described a specific embodiment of the. present invention, it will be seen that we donotwish' to be limited exactly thereto, since various modifications may be made without departing from the scope of the invention, as defined by the following claim.

We claim:

In combination with a plating tank for electroplating metallic strip, a conductor roll for supplying electric current to the metallic strip, said conductor roll being mounted with its axis occupying a substantially horizontal plane and so I disposed with respect to the'plating tank as to cause the strip to move substantially vertically into and out of the same, and means for holding the metallic strip in 'positive contact with said conductor roll at points where it moves into and eccentric 12 which is capable of rotation within shaft III. Secured to the arms 8 are stops l'lv and 18 for limiting the throw of the hand lever IB.- When the hand lever I6 is in the position shown, that is against the stop 18, the holddown roll is forced into contact with the metallic out of contact therewith;- said means comprising a pivoted substantially vertically depending supporting arm on either side of said conductor roll, a rotatable roll carried by each of said supporting arms with its axis in substantial parallelismwith the axis of said conductcr roll, a pair of links, means for anchoring one end of cache! said links, eccentric means connecting each of said'links with one of said supporting arms, and means for operating each of said eccentric means, whereby each of said lest named rolls are moved into and out of contact with said conductor roll at points where the metallic strip moves into and out or contact therewith.

- HOWARD G. BARGI 'ELDI.