US257308A

US257308A - Roll for buffing and polishing machines

Info

Publication number: US257308A
Authority: US
Publication date: 1882-05-02
Anticipated expiration: 1899-05-02

Description

(NoyModeL) G. H. P PLAGG.

ROLL FOR 'BUPPING AND POLISHING MACHINE. No. 257,808. Patented Mav 2,1882.

UNITED STATES PATENT OFFICE.

GEORGE H. P. FLAGG, OF BOSTON, MASSACHUSETTS.

ROLL FOR BUFFING AND POLISHING MACHINES.

SPECIFICATION forming part of Letters Patent No, 257,308, dated May 2, 1882.

Application filed November 30, 1881.

To all whom it may concern:

Be it known that I, GEORGE H. 1?. FLAGG, of Boston, in the county of Suffolk and State of Massachusetts,haveinvented an Improved Roll for Buffing and Polishing Machines, of

which the followingis a full, clear, concise, and

exact description, reference being had to the accompanying drawings, in which- Figure l is a plan of a roll embodying my invention. Fig.2 is a section on the line 00 00, Fig. 1. Fig. 3 shows a second pattern for the outer surface of the cover of the roll.

In machines for buffing the bottoms ofboots and shoes the rolls carrying the sand-paper require some sort of soft elastic covering; and my invention relates to this covering for such rolls; and it consists in a rubber covering the surface of which is formed of numerous ridges with spaces between them.

In the drawings I have shown two forms of these ridges, one form having spaces which are circular, the other having spaces which are square, and it is obvious thatmany other forms may be adopted. A covering made of a cylinder of rubber has been long known for rolls of this kind, used in machines for sandpapering metal and wood, and I have used it experimentally on the rolls of machines for buliing boot and shoe soles, but have not found it as good as the felt covering usually used,because its elasticity was of a kind or quality not suitable for sandpapering leather; but when the rubber covering is formed with ridges, so that the sand-paper is supported by the tops of these rubber ridges,instead of being supported by an unbroken surface of rubber, the effectis (No model.)

with the ridges and that part of the sand'pa per not in contact with them,but lying directly over the spaces, will be so marked as to make imperfect work. In the drawings 1 have shown the ridges as true ridges and united in one continuous sheet, A. This is for convenience in molding the co ering A on the metal part B of the roll; but the covering A maybe open work,and may be secured upon the metal part -13 of the roll in any suitable way, the main feature of my invention being the elastic covering A, formed to support the sand-paper at intervalsinstead of supporting it at allpoints under pressure, as in rolls now in use.

What I claim as my invention is- The improved roll above described, consisting of the central core, B, having secured upon "it the rubber; covering A, made with a large number of cells, a, in it,'substantially as described.

G. H. P. FL'AGG. Witnesses:

WM. ZrrrEL, J. R. Snow.