US1171970A - Mangle. - Google Patents

Description

L. MERTENS.

MANGLE. APPLICATION FILED DEC. 13, I915- Patented Feb. 15, 1916.

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THE COLUMBIA PLM iOflRAPH c0., WASHINGTON, D- c.

'oNrr 'n sTATEs PATE T oE ro LOUIS R. MERTENS, or PHILADELPHIA, PENNSYLVANIA, AssIeNon r0 CHARLES J.

MILLER, or PHILADELPHIA, PENNSYLVANIA. 1

' MANGLE.

, Applicationfiledbecember13,1915. Serial No. 66,467.

To all whom it may concern: 7

Be it known that 1, Louis B. MERTENS, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Mangles, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification. I V

In'sectional mangles comprising a series of rollers and a series of steam chests between which travel the goods to be ironed, the several steam chests are independently connected at one side with a steam line and at the other side with a steam drain.' The goods to be laundried are in a wet or moist condition when they are entered between the first roller and the first steam chest, and they are supposed-t0 be gradually ironed and dried as they pass between successive rollers and chests. The theoretical result is that in the several steam chests there is a certain amount of reduction in pressure in the steam, which reduced pressure steam passes thereout into the drain pipe. In practical use, however, the mangle does not have its theoretical, or at least intended, mode of operation. Obviously, the greatest absorption of heat tends to occur in the front chests with which the moist goods first come into contact, and after the mangle is in use a limited length of time, these chests are rendered practically useless, if not detrimental, as will be understood from the following explanation. The heat absorbed in the front chests is relatively so great that the pressure therein drops below that of the lower pressure steam discharged from the rear chests and a relatively great amount of condensation occurs therein, with the result that a back flow of reduced pressure steam flowing from the rear chests is created in the front chests, still further increasing the condensation therein until, after a certain amount of water accumulates therein, they are practically dead or relatively cold. In a mangle comprising six rollers and steam chests, which'is a standard construction, this phenomenon exhibits itself more particularly in the first two chests. Efforts have been made to remedy the difliculty by adopting various expedients, but I am aware of none which has been successful except the one forming the subject of this application,

Specification of Letters Patent.

towhich it has been subjected.

Patented Felt 15,1916.

which has been effective under all conditions A preferred embodiment of the invention is'shown in the accompanying drawings, in whiche r Figure his a' longitudinal vertical sectional view through the mangle. Fig. 2' is a cross section on the line 2-2 of'Fig. 1.

The first two rollers of the series are each designated a, while the remaining rollers are each lettered b. j V I 0, c, are the two steam chests cooperating with the rollers a, a, and each of the remaining steam chests are marked (Z. The steam chests are supported by a frame 0 which carries bearings for the driven shafts f of the several rollers.

Along one side of the machine frame extends a manifold or header g, which is con-' nected with a source of steam. supply: and which communicates with the steam chests c and cl through the pipes h, one of which is shown in Fig. 2. Along the other side of the machine frame is a header i'connected with an exhaust. Through pipes j this header is connected with the several steam chests (Z. If we imagine this header as prolonged and as connected with the steam chests 0 in the same manner as it is connected with the steam chests (Z, we will have a clear conception of the construction in ordinary use, which causes the serious trouble hereinbefore described. In my invention, however, the header 2' is connected, as stated, only with the steam chests (Z. and a separate drain or header m is provided, which is connected, through pipes ma, with the steam chests c, c. A pipe 0 extends from the front end of drain 2' into the rear of, and partially through, the drain m or a sufiicient distance therein to extend beyondjthe front connecting pipe n. The rear of drain m is closed by a plug 79 surrounding the pipe 0. The result ofthe flow of exhaust steam from the dram '71 out the end of pipe 0 is to create a suction,

similar to that produced by an ejector, in the drain m in the vicinity of the exit end of pipe 0, thereby preventing a back flow of reduced pressure steam into the steam therein even after prolonged use, whereby the efliciency of: the mangle is maintained constant.

It will be understood that my invention is not limited to a construction wherein the drain or header m is connected with precisely two chests. It may be connected with 1 steam chests and a series of corresponding andcooperating feed rollers, asteam supply for the several chests, a steam drain'connected with one or more of the front chests and a separate steam discharge pipe connected with the remaining chests and ex-r tending into said drain and operatingto inducea-flow vof steam thereinto from the front chests;

2. A mangle comprising front and rear steam chests and as series-0f corresponding;

and cooperating feed rollers, a steam supply forthe several. chests, a front steam drain; one or more PIPES connecting the same with the front chest or chests, a rear steam drain and pipes connecting the same-with the remaining chests, and a pipe extending from i the rearsteanr drain into the front steam drain beyond the first named pipes.

In testimony of which invention,- I have hereunto setmy hand, at Philadelphia onthis 10th day of December, 1915. r

LOUIS R; MERTENS'. 1

Copies of .this patent may be obtaine'ttfor rive cents each, by addressing the Commissioner of Patents,

Washington, D. G. i

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