US140456A - Improvement in roller-presses for polishing photographs - Google Patents

Description

N. S. BOWDISH.

Roller- Presses for Polishing Photographs. N0.140,456.

Patented July I, 1873.

UNITED STATES PATENT OFFICE.

NELSON S. BOVVDISH, OF RIGHFIELD SPRINGS, NEXV YORK.

IMPROVEMENT IN ROLLER-PRESSES FOR POLISHING PHOTOGRAPHS.

Specification forming part of Letters Patent No. 140,456, dated July 1, 1873; application filed I March 5, 1873.

To all whom it may concern:

Be it known that I, NELSON S. BOWDISH, of Riehfield Springs, ()tsego county, New York, have invented an Improvement in Presses for Rolling and Polishing Photographs, &c., of which the following is a specification Presses have been made in which the bed is drawn through between two rollers that are fixed in a stationary frame and revolved by a crank. In other cases the pressure-roller has been placed above the bed and beneath ways that applied the pressure. In the first instance the bed was movable and not well adapted to polishing photographs in the second case the ways being above the bed interfered with introducing and removing the photographs.

A printing-press has been made with a traveling frame carrying rollers above and below the stationary bed; but the same is not adapted to polishing photographs.

My invention consists in combining, with a polished bed, a traveling pressure-roller, a lower or resisting roller, and adjusting mechanism, whereby the photograph is polished by the rolling pressure and the resisting pressure is below the bed near the same point, so that the bed and other parts can be made very light without risk of breaking.

In the drawing,Figure l is a longitudinal vertical section of the machine, and Fig. 2 is a cross-section of the bed with the journatbox at one end also in section.

The bed a is supported upon the legs b, and it is to be smooth upon its surface, and either perfectly fiat or slightly arched in shape, if desired. The surface may be metallic and polished, or any suitable material may be employed. A carriage, d, with rollers e e, is suspended from the journal-boxes f of the roller g, and in the boxes f there are openings into which the screws 1' pass. The downward prismatic projections 1" of the journal-boxesfenter boxes at the ends of the carriage (I, and the screws 43 pass in from below through the carriage (1 into the portions 1" of the journalboxesj', so that by revolving the screws ithe proximity of the rollers e and carriage cl to the bed may be regulated and the pressure of the roller 9 upon the picture be thereby determined. The worm-pinions l 1 upon the shalt a gear into the wheels 0 upon the screws 'i, so as to turn them simultaneously in either direction and raise or lower the carriage d, and increase or lessen the pressure of the roller on the picture. The crank t is employed to gurn the roller 9 and move the same along the I remark that the rollers c 6 may extend entirely across below the bed a, if desired, and the bed a may have either a flat or an arched surface, and the crank t may be applied to one of the rollers 0 instead of, the roller g, and there may be teeth adjacent to the rollers 6, taking into rack-teeth upon the under side of the bed.

The bed a may be more or less heated to promote the polishing of the pictures.

I claim as my invention- The stationary polished bed, in combination with the rollers g and 0, carriage d, and adjusting mechanism, substantially as and for the purposes set forth.

Signed by me this 27th day of February, A.

N. S. BOWDISH.

Witnesses:

G. M. FERRELL, A. H. ELwoon.

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