US86875A - Heney skidmore - Google Patents

Description

UNITED STATESPATENT OFFICE. A

HENRY SKIDMORE, OF MOUNT VERNON, NEW YORK.

BRONZING-MACHINE.

Specification forming part of Letters Patent N0. 86,875, dated February 9, 186i).

To all whom it may concern:v

Be it known that l, HENRY SKiDMoRE, of Mount Vernon, in the county of Westchester and State of New York, have invented a new and useful Improvement in Bronzin g Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in which- Figure l represents a sectional elevation of a bronzing-machine constructed in accordance with my improvement, and Fig. 2 a plan of the same with the lid or cover to the surplusbronze box removed.

Similar letters of reference indicate corresponding parts in both figures.

The machine which is the subject of this specification is more especially designed for bronzing printed sheets of paper, foil, or other material, the printing on said sheets either being letters or any fanciful design.

The invention consists, first, in a combination, with an endless sheet-carrier or revolving cylinder, of a bronzing-roll, clothed with fur or other suitable material, and knife for regulating the supply of bronze-powder to said roll, and serving to smoothen the furred or soft clothing to the latter, while the sheetcarrying cylinder, or sheet thereon, which travels at a higher velocity than the bronzingroll, but, as regards its contiguous surface, in the same direction, operates to roughen the fur or clothing,l and to detach the powdered bronze held by the same, and to cause it to be laid on the printed sheet.

The invention also embraces, in combination with fur or soit clothed bronzing-roll, removable partitions or slides to the hopper which supplies the bronze-powder to the roll, said slides being of concave shape at their lower ends, corresponding to the periphery of the roll, and being arranged to fit any of a series of grooves made in the hopper, for the purpose of restricting the supply of bronzepowder to the roll, according to the width of the sheet or location of the printed matter thereon to be bronzed. .v

Likewise, the invention includes a combi` nation of a fur or soft clothed roll with the sheet-carrying cylinder, so arranged and operating in relation to the latter as to take up the surplus powdered bronze from the printed sheet, and to burnish or polish the bronze'd surfaces, said roll being furthermore arranged to project into a surplus-bronze receptacle, where it is relieved ofthe powdered bronze held by it, or clogging of the same prevented, by the action of a revolving brush, and the latter in its turn kept free, and the surplus powdered bronze collected in the receptacle by means of a bar or striker, which the bristles of the brush, in the revolving of the latter,

catch against, and thereby spurt or detach thepowdered bronze. Y

The parts of the machine, too, are so'arf ranged as that every facility is afforded for' examining the condition of the work as it passes from under the bronzing-roll,and for ascertaining whether said roll has been properly adjusted for the performance of its work.

To enable others skilled in the art to which this my improvement relates to make and use the saine, I will now proceed to describe the same with reference to the accompanyingl drawing.

A represents the sheet-cylinder, which revolves or is drivenv in the direction indicated by arrow o in bearings made in side frames to the machine.

B is theffed-board, that serves to supply orY feed in the printed sheets, which, as the cylinder is rotated, are caught by fingers a, and carried round by the cylinder toa point or place of delivery. These fingers, means for operating them, and means of detaching or freeing the sheets from the cylinder after performance of the work, are or may be similar to those employed in printing-presses, and, being no part of the present invention, need no minute description here.

Over the cylinder A, and preferably a little in front of it, is arranged a roll, C, driven to rotate in direction of the arrow w, and covered or clothed with fur b, or other soft and suitable material of ltolerably even thickness, but preferably fur. This roll G has its fur surface or periphery supplied with bronze-powder from a box or hopper, D, under which said roll works, and in the ends of which it has its bearings. Said box or hopper D is orshould be made vertically adjustable by a slotted connection of it with the side frames of the machine, for the purpose of allowing said hopper to be set closer and harder or lighter on the roller C, to regulate the pressure under which the sheets receive the bronze. The printed surfaces of the sheets' are bronzed by the passage of the latter, through means of the carry: ing-cylinder A, under and past the bronzingroll C.

Attached to the one side or front of the hopper D is a knife, E,.arranged to project within the hopper, so as to rest or press upon the fur b, the side piece of the hopper to which the knife is attached being adjustable up or down to regulate such pressure. This knife E serves to regulate the amount of bronze on the roller C, and to lay it thereon by the smoothening of the fur b, said roll C turning at a comparatively slow velocity to the cylinder A, or periphery thereof, on which the sheet is carried. The motion from' the cylinder A to thev roll C may be communicated from pulleys by a belt, c, or otherwise.

Thus it will be seen that the printed sheet. passes under the fur b of the roll C at amuch greater speed than said bronzingroll C runs it, which action (more or less) roughs up the fur, and so causes the sheet to fake off bronze from the roller.

The sides of the hopper D are formed internally with a series of vertical grooves, d, into or down which fit slides F, to vary, as it-were, the capacity of the hopper, by confining the bronze or bronze-powder to or over so much of the roll C as is necessary to cover the printing on the sheet, according to the work to be done, and whereby-that is, by adjusting the slides F in different grooves d-a surplus dis tribution of bronze on the roll is prevented, and much waste of the` powder thereby avoided. These slides F are of concave form on their lower ends, corresponding to the rotundity of the roll C, into the fur of which they enter, to give closeness to the portion of the hopper thus partitioned off for retention of the bronzepowder.

The cylinder A, or sheet thereon, is uncovered or exposed to View for a certain distance in rear of the roll G, for the purpose of ascertaining whether said bronzing-roll has been properly adjusted relatively to the cylinder A to perform its work. This is important, for if the roll C be not set down hard enough the ink on the sheet will not be covered well by the bronze, while if set down too hard theink will be wiped off and blurred by the bronzingroller.

Such facility for examination is secured by a detached and relative arrangement to the cylinder A of a surplus-bronze receptacle, G, which ,carries wiping devices, and free or uni nclosed character of said cylinder immediately in rear of the bronzing-roll C.

In the continued motion or rotation of the sheet by the cylinderA, with the loose bronze hanging, as it were, all over its printed surface or surfaces, said sheet passes under or past a wiping apparatus. This apparatus consists of a surplus-bronze receptacle or box, G, set at a suitable distance in rear of the cyliuder A, and which may be adjustable relatively thereto, said box 'carrying on its side next to the cylinder A, and so as to work partly within and partly outside of or through said box, a roll, H, driven to rotate as indicated by thev arrow x, and covered with fur or other soft clothing. This roll H, traveling as indicated, serves to wipe off the bronze hanging loose on the printed sheet, and to burnish or polish the bronzed surfaces. To prevent this roll H from becoming clogged with the surplus bronze, the latter is brushed out of the fur clothing of said roll by means of a brush, I, arranged within the receptacle G, and rotating as indicated by the arrow y, and this brush kept free or clear by causing its bristles to come in contact with a bar, J, so as to spurt or detach the bronze. In this way the wiping apparatus is preserved clear and in working order, and all surplus bronze-powder saved or economized by its collection within the receptacle G, from which it may be drawn by opening a slide, f.

The printed and brouzed sheet, thus cleaned of loose bronze, is, by the continued motion of the cylinder A, carried forward to its point or place of delivery on the under side of said cylinder, and to prevent its free end from pre- Inaturely dropping it may be guided at its edges by springs g, and ultimately pass over a roller, h, and brush t', which latter answers to detach the sheet from the cylinder after the `fingers have released hold of it, and to direct it onto a ily-board, from whence it maybe taken to dry.

Vhat is here claimed, and desired to be scoured by Letters Patent, is i 1. The combination, with an endless sheetcarrying device or cylinder, A, of a bronzingroll, C, clothed with fur b, arranged` to travel j in relation to each other, substantially as specified.

2. The combination of the bronze box or hopper D, knife E, soft-clothed bronzing-roll (l, and sheet feeding or conducting cylinder A, arranged to rotate, as regards its periphery, at a higher velocity than the roll C, and in relation thereto, essentially as herein set forth.

The hopper D, havin provided with removable slides F, arranged to fit said grooves, and made concave at their lower ends, for operation in combination with a soft-clothed bronzing-roll, C, as and for the purpose or purposes described.

4. The brushroller I, revolving in `contact with the burnishing-roller H, for freeing it of the surplus bronze-powder, substantially as set forth.

5. The arrangement, essentially as specified, of the wipingy apparatus and surplus-bronze receptacle Gr to the cylinder A and bronzingroll G, with its box or h relatively to the sheet-cylinder A, substantially as described.

lll". SKIDMORE.

Witnesses:

HENRv T. BROWN, A HENRY PALMER.

g grooves (l in it,and

opper D adjustable

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