US2920699A - Paper making apparatus - Google Patents

Description

Jall- 1960 P. A. FASOLI 2,920,699

PAPER MAKING APPARATUS I Filed Dec. 14, 1956 LNVENTDR I yea/7 7 United States PatentOfifice 2,920,699 Patented Jan. 12, 1960 2,920,699 PAPER MAKING APPARATUS Application December 14, 1956, Serial No. 628,377 2 Claims. (Cl. 162-443) This invention relates to new and useful improvements in paper making apparatus and is directed more particuhtrly to improvements in stock delivering apparatus of the pipe type flow distributor type.

c principal objects of the invention are directed to the provision of apparatus for delivering paper making stock in such manner that the paper making fibers are distributed uniformly across the paper making machine, thereby overcoming the objectionable concentration of stock in certain areas. Great difficulties have been experienced in distributing fibers uniformly with the result that the formed sheet products vary in characteristics transversely thereacross.

According to novel features of the invention, the apparatus is constructed and arranged to deliver a row of separate, adjacent, and closely spaced streams of stock to a paper machine in order to provide a uniform distribution of the fiber stock thereacross. The streams are independently controllable so that it is possible to overcome any noticeable tendency of stock concentration at any certain point or points.

In a broad way, the apparatus is characterized by a plurality of separate conduits, preferably of substantially equal length, which extend from a dome or header and which have nozzles, arranged in adjacency, in a row, with manually operable means associated with each conduit to facilitate the delivery therefrom of an independently controlled stream of stock.

The novel features of the invention are hereinafter disclosed in the form at present preferred but it will be understood that various changes and modifications may be made in the form of the construction shown without departing from the spirit and scope thereof.

In the drawings:

Fig. 1 is a small scale, diagrammatic, plan view of a head-box and stock delivering apparatus embodying the novel features of the invention;

Fig. 2 is a side elevational view of a portion of a head-box having a header connected thereto by one of the conduits of the invention;

Fig. 3 is a rear elevational view of a lower portion of a head-box having a nozzle associated therewith; and

Fig. 4 is a sectional view on the line 4-4 of Fig. 2.

Referring now to the drawings in detail, the invention will be explained.

A header, shown at 2, at its lower end is connected to a stock supply in such a manner that stock is supplied to the header at any desired volume and pressure.

The header comprises a vertically disposed single stand pipe wherein the pressures therewithin are substantially equal at all points in any horizontal plane thereof.

The header preferably has an upwardly diverging side wall, as shown. A spherical perforated member 4 within the header has opposite end shafts 6 which are rotatable in bearings 8 secured to the header. A motor 10 is secured to a bracket 12 which is fixed on the header and has a worm 14in mesh with a gear 16 of the shaft 6.

By rotating this perforated sphere, the lands of the holes or openings are kept clean of the fibers circulating therethrough.

With stock flowing upwardly within the header, the member 4 is continuously rotated by the motor 10,01 by some equivalent means.

The member 4 is arranged to operate after the manner of a holey roll to obviate any bunching and clumping of the stock fibers as they surge upwardly in the header. It acts as a rectifier and has the capacity of breaking up the fibers flowing in the stock,.and of stopping the tendency to go into violent flows or surges.

A plurality of outlets 18 are provided which are spaced around the upper circumference of the header 2, to which outlets are connected conduits, such as indicated by 20.

The top wall 22 of the header is in the form of an inverted dome, as shown. The dome is so arranged that it eliminates entrapped air at the upper end of the header as stock flows upwardly therein and out the outlets 18.

The disc shaped dome 22 offers a self-cleaning effect, and aids in preventing the circulating fibers from collecting at the top of the header.

It will beappreciated however that the top wall of the header can be concaved or conical or formed with any other generally curved surface which projects downwardly into the interior thereof.

A diaphragm of conventional design is provided at the top of the header, and is fixed to the top wall member 22, an opening 52 therethrough offering communication to the yieldable member 54 thereof, on the opposite or provided.

The diaphragm functions to absorb pump shock and to make possible more uniform delivery.

The conduits 20 preferably are made of flexible tubing and may comprise lengths of hose or the like. Lower ends of the conduits 20 may be secured to the outlets 18 by clamps 24 or by othersuitable means.

The conduits 20, at the upper ends thereof, are secured to nozzles, such as 26, by clamps 28 or the like. Said nozzles may take various forms but preferably have elongated outlets.

The nozzles 26 are arranged closely adjacent and preferably in a row across the bottom wall 30 of a head-box so as to provide a plurality of outlets, or inlets into the head box, indicated by 32, as shown in Fig. 1. The head-box is shown diagrammatically, for purposes of disclosure, as having forward and rear walls 34 and 36 and opposite end walls 38.

The head box herein referred to is well known in the art, and to which paper making stock is supplied and flows therefrom onto a wire. According to this invention stock is supplied the head box through a plurality of closely adjacent inlets, for uniform fiber distribution.

The nozzles of course may be associated with forms of apparatus other than the specific head-box shown.

The conduits 20 preferably are substantially equal in length and are arranged so that there are no downwardly depending loops wherein stock is likely to be pocketed.

There being different pressure drops in conduits of different lengths, conduits of the same length within a single system are preferred.

There may be as many conduits as may be desired and the relative arrangement thereof may be such that, being of substantially equal length, there will be a free flow of stock therethrough.

Control means is associated with each conduit which, for purposes of disclosure, may be called a squeeze valve, indicated by 40.

Each valve 40 may include a strap 42 around the conduit which has a stem 44 in threaded engagement thereupper side of which an air chamber 56 is with. The stem 44 carries a pad 46 which, as the stem is turned inwardly, presses on a side wall of the conduit so as to displace the side wall and more or less to restrict the passageway of the conduit. Various forms of control means may be employed with the conduits whereby the flow of stock in the conduits may be independently controlled.

As stated, the conduits may be connected between the header flow box in any desired relationship. The arrangement shown in Fig. l is for the purpose of disclosure only.

7 With a predetermined number of conduits, they may be arranged in various relationships so as to provide the plural streams.

' The conduits being of the same length, the flow of stock therethrough is substantially uniform, all as is desired. However, by valve means associated with each conduit, the flow of stock in each conduit is independently controlled or adjusted.

The distance from the header to each nozzle being substantially the same, the tendency of the stock to flow at difierent rates is overcome. However, the rate of flow may be adjusted, as to each conduit, so that the distribution of fibers from the outlets 'is uniform across the machine and without objectionable turbulence in any area or section thereof.

Stock to the header is at such volume and pressure as may be desired and, of course, may be controlled by valve means or the like, in the well known manner.

The member 4, which may be termed a holey ball and being rotatable functions in the manner of a holey roll on the upfiowing stock, and entrapped air in the upper end of the header is avoided by the form of the upper wall of the header.

Various changes and modifications may be made in the form of the apparatus without departing from the spirit and scopev of the invention. Therefore it is desired to. be limited, if at all, by the appended claims, rather than by the foregoing description.

It is desired to claim and secure by Letters Patent of the United States the following:

1. The combination with 'a paper making machine head box having a row of closely adjacent equally spaced openings disposed in a common plane for the flow of paper making stock onto a forming element of means for delivering separate streams of stock to each of said openings comprising, a single hollow cylindrical stock header having a closed upper end disposed in a plane below the plane of said openings of the head box and provided with a lower inlet for receiving stock under pressure, said header provided with a stock outlet for each one of the openings of the head box disposed downwardly of the closed upper end thereof, a separate single elongated relatively flexible conduit having a lower end connected to each stock outlet of the header and extending upwardly therefrom to and having an upper end connected to one opening of said head box, said head box and the openings thereof and said header and the outlets thereof and said conduits being relatively arranged whereby said conduits are substantially equal in length.

2. The combination with a paper making machine head box having a row of closely adjacent equally spaced openings disposed in a common plane for the fiow of paper making stock onto a forming element of means for delivering separate streams of stock to each of said openings comprising, a single hollow cylindrical stock header having a closed upper end disposed in a plane below the plane of said openings of the head box and provided with a lower inlet for receiving stock under pressure, said header provided with a stock outlet for each one of the openings of the head box disposed downwardly of the closed upper end thereof, a separate single elongated relatively flexible conduit having a lower end connected to each stock outlet of the header and extending upwardly therefrom to and having an upper end connected to one opening of said head box, said head box and the openings thereof and said header and the outlets thereof and said conduits being relatively arranged whereby said conduits are substantially equal in length and each said conduit provided with manually operable means for controlling the flow of stock through said conduit.

References Cited in the file of this patent UNITED STATES PATENTS

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