US144741A - Improvement in bronzing-machines - Google Patents

Description

' NIT A'IENT: Crimen LOUIs e. OIIAPUT, wILLIAiwI nnAInwoon, AND JOHN nnAIDwooD, on

New YORK, N. Y.

EMPRVEMENT IN BRONZINCl-'MACIJHNES.`

Specification forming part of Letters Patent No. 144,741, dated November 18, 1873 application `filed August 7, 1873. I

To all whom it may concern.:

Be It known that we, LOUIS G. CHAPUT,

WILLIAM BnArnwoon, and JOHN BRAID- y topview of the same.

Similar letters indicate corresponding parts.

This invention relates to a brOnzing-in achine in which the material or web to be bronzed is fed in between an endless apron and a bronzi-ng-roller, the surplus bronze being swept off by means of brushes, and deposited on an inclined plane leading down to the bronzingreservoir, whence the same is taken up by the -bronzing-roller to be. applied over and over again. While the Web is being acted on by the brushes it is supported by cords which eX- tend inoblique directions under the endless apron, being held in position by grooved rollers, so that the brushes are enabled to reach every part of the surface of the web. With the oblique4 cords is combined an adjustable comb, to prevent the web on its passage out of the machine from catching under any of the cords. With the comb and the cords is combined a delivery-roller, to insure the discharge of the web.

In the drawing, the letter A designates a box, the sides of which form the working `parts of our machine. To one end of this box is secured a table, B, over which the web or the material to be bronzed is fed. On being passed into our machine, the web is caught between the endless apron C and the bronzing-roller l), that surface of the web on which the bronze i is to be applied being turned downward. The

endless apron C is stretched over two rollers, E E', and its lower branch is slightly depressed by an intervening roller, G. The bronzingroller D is covered with velvet, felt, or other suitable material, and it dips into the fountain H, which contains the powdered bronze, and the bronze taken up by said roller is transferred to the surface of` the web, where it adheres to those portions that have previously received an ilnpression with some adhesive substance. On leaving the bronzing-roller the web passes upon a series of cords or strings,

1), which are stretched over rollers e de f, two

cords, and at the same time said apron sup" ports the web against the action ofthe brushes g, which are situated beneath thecords. The

object of these brushes is tosweep off the sur` plus bronze from the web, and they act on the web through between the cords. 1f the cords extend in a direction parallel to the :motion of the web, they prevent the brushes from acting I on all parts of the web, and the surplus bronze is not swept off from those portions of the web which are covered by or opposite the cords. This difiiculty we have overcome by providing each of the string-rollers d and f with a series of grooves, (see Fig. 2,) so that the strings or cords can be made to run through the machine` in oblique directions, and by employing two or more brushes those parts of' the web which are not touched by one brushwill be reached by another, and the surplus bronze is swept oif uniformly over the entire surface of the web. As the web passes the roller E of the apron, it is carried along merely by the cords, and if one of the corners of said web should turn down it would be caught between fthe cords and the roller d, whereby the samewould be liable to get torn, and the operation of the machine would be interrupted. This difficulty we have overcome by arranging beneath the cords, in front of the roller d, a comb, h, the teeth of which are curved, and the head of which consists of a rocking crank-shaft, so i that the curved backs ofthe teeth can be made to project above the cords toa greater or less 1 extent. By these means the web isprevented from catching under the cords, and it is safely guided out over the roller d. If the comb h is not required, its teeth can be turned down out of action. On the roller d rests the delivery-roller c', Which bears down on the same by its inherent gravity, and revolves by contact with the same, or with the Web resting thereon. This roller insures the discharge of the Web. The surplus bronze which is swept off from the Web by the action of the brushes drops down upon an inclined plane, I, which leads into the fountain H, so that the surplus bronze is returned automatically to the fountain, and the machine can be operated for a long time Without requiring a fresh supply of bronze.

In practice, the rollers E E', which carry the endless apron, the bronze-roller D, and the string-rollers c, d, e, and f, Will be geared together so that they move With a uniform supercial Velocity, While the brushes g may be made to revolve in the same direction with the string-rollers, but with a greater superficial velocity; or they may be made to revolve iu an opposite direction to said string-rollers.

Vhat We claim as new, and desire to secure by Letters Patent, is-

1. The cords or strings I1, running in an oblique direction by means of grooved rollers df, in combination with the endless apron O, bronzing-roller I), and brushes g g, substantially as shown and described.

2. The comb h, in combination with the oblique cords or strings b, delivery-roller z', and apron C, substantially as and for the purpose set forth.

3. The combination of the inclined plane I, fountain H, bronzing-roller D, apron C, cords b, and brushes g, constructed and arranged substantially as shown-and described.

LOUIS GEO. OHAPUT. WVM. BRAIDVOOD. Witnesses: JOHN BRAIDVVOOD.

W. I-IAUFF, F. H. GENTNER.

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