US524299A - Suction-box mechanism for paper-making machines - Google Patents

Description

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J. W. & J. G. BBDALE.

SUCTION BOX MECHANISM FOR PAPER MAKING MACHINES. No. 524,299. Patented Aug. 14, 1894;

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J. W. 8: J. G. BEDALE. SUCTION BOX MECHANISM FOR PAPER MAKING MACHINES.

No. 524,299. Patented Aug. 14, 1894.

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JAMES W. B DALE AND JosEPH e. BEDALE, OF ERIE, PENNSYLVANIA.

SUCTION BOX MECHANISM FOR PAPER-MAKING MACHINES. I

- SPECIFICATION forming part of Letters Patent No. 524,299, dated August 14, 1894.

Application filed January 25, 1894. Serial No.49'7299l. (No model.) i

- States, residing at the city of Erie, in the county of Erie and State of Pennsylvania,

have jointly invented certain new and useful,

Improvementsin Suction-Box Mechanism for Paper-Making Machines; and we do hereby declare the following to bee full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

Ourinvention consists in theimprovements 1n suction box mechanism for paper making machineshereinafter set forth and described, and illustrated in the accompanying drawings, in which- Figure 1.is' a side elevation of a paper mak- Ing machine embodying our improved suction box mechanism. Fig. 2. is a longitudinal section of our improved suction box mechanism, on the line 7), 'v, in Fig. 4. Fig. 3. is a transverse section of the same'on the line w,2v,in

Fig. 2, looking in the direction of the arrow,

with parts in elevation and parts broken away. Fig. 4. is a transverse section of the same on the line w, m, in Fig. 1, looking in the direction of the arrow.

Our. improved suction box mechanism consists of a perforated cylinder, rotating on suitable bearings, so as to be in contact with the under side of the wet felt, bearing the layer of wet piilp thereon, and rotate in unison with the travel thereof from the pulp supply tank to the drying rolls; within this perforated cylinder is a chamber having an opening therein along the top thereof, and longitudinal rollers at the sides thereof, and caps at the ends of said rollers in close contact with the inside of said perforated cylinder, said chamber being provided with an exhaust pipe, communicating with a pump or other suitable exhaust mechanism, whereby a strong suction is brought to bear upon that-portion of the wet felt, and the layer of pulp thereon, in contact with said perforated cylinder, so that as the wet felt and layer of pulp thereon travel over said cylinder, the water is exhausted therefrom into said chamber, from which it passes away through the suction pipe connected therewith.

In Fig. l, of the drawings A is the pulp tank, A the pulp cylinder, B the couch roll, B the wet felt, D, D the press rolls and E the web of paper issuing therefrom. These features, however, form no part of our improved suction box mechanismF, over which the wet felt B passes; this suction box mechanism F being connected by means of pipes fwith a suction pump f which operates to Withdraw theair and water from the wet felt B, and the layer of pulp thereon,through the suction box mechanism F. This suction box mechanism F we construct of a perforated cylinder G within whichis a chamber H,provided at one end with a hollow trunnion II which is supported by a standard it and connects with the suction pipefithe opposite end of the chamber H is provided with a solid trunnion H which is firmly secured against rotation in a standard It by means of a key M, or other convenient device.

with rubber or other elastic coveringJ these. rollers J, J, are provided with journals 7 on UNITED STATES PATENT QFFICEJ.

the ends thereof which rotate in boxes esupported by springs e, by means whereof the rollers J are always kept in close contact with the inner surface of the perforated cylinder G. These rollers J, J, are set some distance apartso asto have a longitudinal slot or opening K between them, through which opening K air and water from the wet felt B, and the layer of pulp thereon, passing over the cylinder G are drawn down through the. holes g therein into the chamber II by the operation of the suction pump f thereon. The openings at the ends of the rollers J, J, are covered by means of caps K (shown clearly in Fig. 3.) the peripheries of which fit closely up against the inside of the ends of the cylinder 75 The cylinder G is provided with bearings G, so as to prevent the air passing into the chamber H' between the ends of the rollers J, J;'and the rear portions of the rollers J, J, rotate in close contact with the edgesiof the opening I in the top of the chamber (see Fig. 4.) so that very little or no air can be drawn into the chamber H, except that drawn into it through the longitudinal space K between the rollers J, J.

In operation as the wet felt B. travels over the perforated cylinder G it contacts with the top thereof sufficiently to rotate it at a.

peripheral speed equal to that of the travel of the wet felt B contacting therewith, and as the felt travels forward, the water therein is sucked through the holes 9 in the top of the cylinder during the time each row of such holes 9 is passing over the openingK between the rollers J, J, in thetop of the chamber H, and this action on the felt is continuous, so that all of the surplus water is removed from the wet felt and from the layer of pulp thereon during its passage over the perforated cylinder G.

In the drawings we have shown but one construction of our device, but we are aware that other modifications of the same can be readily made without departing from the spirit of our invention; therefore,

Having described our invention, so as to enable others to construct and operate the same, what we claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination in a suction box mechanism for paper making machines, of a perforated cylinder in contact with the wet felt of a paper making machine, and rotating in unison with the travel of said felt, achamber within said cylinder supported upon trunnions, which operate also as the bearings upon which said cylinder rotates, and one of which is hollow and connected with suction mechanism, a longitudinal opening in said chamber at the point at which the felt contacts with the perforated cylinder, longitudinal rollers at the sides of said opening contacting with the inside of the perforated cylinder, and caps at the ends of the rollers,su bstantially as and for the purpose set forth.

2. The combination in the suction chamber of a suction box mechanism for paper making machines, of a chamber havinga longitudinal slotor opening in one side thereof, a longitudinal roller at each side of said slot, elastic surfaces on said rollers, and boxes in which said rollers are journaled mounted upon springs, substantially as and for the purpose set forth.

3. The combination in a suction box mechanism for paper making machines, of a chamber H supported on a hollow trunnion H and a solid trunnion H a perforated cylinder Gr mounted on said trunnions H, H and rotating around said chamber II in close contact with the upper part thereof, a longitudinal.

opening I in the top of said chamber, longitudinal rollers J, J, in said opening I close to the sides thereof, boxes e in which said rollers J, J, are journaled, supported on springs e and caps K closing the opening I at the ends of said rollers, substantially as and for the purpose set forth.

In testimonywhereof We affix our signatures in presence, of two witnesses.

JAMES W. BEDALE. JOSEPH G. 'BEDALE.

Witnesses:

F. E. ALLEN, ISADOR 803m.

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