US1519696A - Paper machine - Google Patents

Description

Dec. 3%, 1924. ESflgfigw E. NISHINA PAPER MACHINE Filed July 19, 1922 EMSk/hd Patented fies. l6, 1924i.

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EZQPEE NISHm A, F TOKYO-EU, JAIAN.

, V rarnn micnmn Application filed July 19, 1922. Serial N0.'576,114.

pulp, upon the said endless band, the ejector so mounted that its spout closely 0ppo site the endless band at a phrase little removed from the top-oi the rollertowa-rd the directionin which the endless band travels and the projection is made obliquely against the band at about 45. The object of the infrom the web of pulp formed on the endless band and to prevent any possible damages to the said bandand'the roller carrying it. Fig. 1 is a diagrammatic representation ,of the presentinvention.

Fig. 2 is a side view, part sectional, of the ejector.

Fig. 3 is a sectional view of a pulp feeding pipe, enlarged.

Instead of the long net or the round net as now generally used for paper manufacture, if an endless band of woolen cloth or metallic net'is employed, and the pulp is projected thereupon with a great force, a tougher land of paper will be obtained, but

such process is liable to cause damages tothe band or receiver on which web of paper is to be formed, owing to the force with which the pulp is t1rlrro ected. Thepresent.

invention obviates s inconvenience by ar ranging an endless band on which web of paper is to be formed in such a way that it travels very rapidly b means of a rotating cylinder or roller and by projecting the pulp thereupon obliquely by means of compressed air from an ejector mounted in a specially convenient position, at the same time facilitating d ing of the web formed.

The to lowing is an example of carrying my invention into practice:-

An endless band (8) of woolen cloth or metallic net of fine meshes on which web of paper is to be formed, is run over a rotating cylinder (4), a press roll (6,) and a number :95 of guide rolls (11) so as the band is able to travel very rapidly. 7 An ejector (3) is invention is to facilitate draining oflof water;

1 stalled above the rotating roller (4), its

spout (13) lyingclose to the belt a little re moved from the top point of the roller toward the direction of the travel of the belt as at (5), and making therewith an angle of about'45. The ejector may be' of any suitable form, but as shown .in the a'ccompanying drawing, it is a .kind of a long, irregular box with a spout ('13) of narrow slit extending across nearly the whole breadth of the traveling band. Through the upper part of this box, or ejector, several air tubes (l) are introduced, terminating atabout middle of the box through which tubes (1) the air compressed to a pressure of several thousand pounds per square inch,- is forced, and which byits force project upon the traveling band the pulp introduced into the box through pipes (2) which enters the box also at its upper part. These pulp feeding pipes (2) are rifled with shallow spiral (14) or divergent grooves for the'purpose of well intermingling the fibres of pulp there. There are also provided on both sides of the traveling band boards which serve as rims and prevent scattering away of pulp; The web of pulp thus formed upon the traveling band is then takenup by another endless belt (10) passes between the press rolls (6,)

and over theguide roll (11) The pulp then goes round the drying drum (7), gets dried there and comes out of the machine. It is necessary to keep the surface of the bands .(8) and (10) always clean, and

for. this purpose brush rolls or cleanin apparatus (9) are mounted-at suitable p aces.

To operate my machine, the air compressed to a pressure of several thousand pounds er square inch is sent through the air tubes 1). By the force of this compressed air, the softpulp suspended in the water is projected upon the Very rapidly travelling endless band (8) at a place as at ,(5) at an angle of about 459. the pulp 'film is drained away bythe-force Part of the water contained 1n with'which the pulp projected and the rest is a. squeezed out while it passes between the press rolls (6,) (6 The film is then trans} ferred to another endless band (10). On passing between the press r011 (6 and the drying drum (7), the pulp filni is taken up by the latter, and while going round it, it gets quite dried. The process after drying is carriedon in an ordinary manner.

As it must have been seen from the above description, the main feature of the present invention consists in causing an endless band to travel veryIapidly and projecting pulp thereon with a eat force at a place a little removed from life top point of the rotating roller toward the travelling directionof the band atfan' angle of about 45. The Several advantages of myinvention are ;The progress of the band never hindered; no damages occur to the band or the roller; drying of the pulp web is facilitated;rand the mo- .tive power to propel the band is much saved..

Claims: f hm 1. paper manu acturing mac e in- .cllldin a h g 3 tor, a 'gh' spee operable endless band and the ejector and the band being arranged in close relation and'at 45 with respect to each other, jbstantially as and for the purposes set forth. .p r I 2. A paper manufacturing machine including a high pressure operable pulp. ejector and a high speed operable endless band havinga' portion arranged in close relation and "at an angle of to the mouth of the ejec tor, substantially asand for the purposes set forth. V

3. A pa er manufacturing machine ineluding an endless band operable at a high speed and an ejector including a box-like body, a spout formed across the lower portion thereof and having a relatively narrow mouth,- pulp conducting .pipes' connected with the body of the ejector, compressed air conducting pipes communicating with the ressure operable pulp ejecbody of the ejector and adapted to force pulp through the mouth of the ejector-,and the endless band and the ejector bein ranged in close relation and at 45 wit respect to each other;

4. An arrangement as claimed in claim 3,

'wherein the inner surfaces ofthep'ulp con- Jayerof pulp, another endless band arranged above the first mentioned endless band to which the web of pulp is transferred, a drying drum arranged above the last mentioned endless band for receiving the pulp web from the second mentioned endless band, and press rolls operably mounted within the endless-band's and coacti'ng respectively with the hands and with the second mentioned band and the drum, substantially as and for the purposes set forth,

In testimony whereof I have aflixed my signature.-

ENPEI 'NISHINA.

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