US1279672A - Sheet-cleaning machine. - Google Patents

Description

S. E. DIESCHER.

SHEET CLEANING MACHINE.

APPLICATION FILED DEC-10.1917.

INVENTOR 3 SHEETS-SHEET I.

Patented Sept. 24, 1918 S. E. DIESCHER.

SHEET CLEANlNG MACHINE.

APPLICATION FILED 0:010, 19x7.

Patented Sept. 24,1918.

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S. E. DIESCHER.

SHEET CLEANING MACHINE.

APPLICATION FILED 05c. I0, 1917.

Patented Sept. 24, 19151 3 SHEETSSHEET 3.

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SAMUEL E. DIESCI-IER, 0F PITTSBURGH, PENNSYLVANIA.

SHEET-CLEANING MACHINE.

Specification of Letters Patent. Patented 86131324, 19 1 8- Applieationfiled December 10, 1917. Serial No. 206,432.

To all whom it may concern:

Be it known that I, SAMUEL E. DInsoHnR,

residing at Pittsburgh, in the county of Alle- 'the plates are fed between rolls revolving in a box containing bran or other cleaning material. Such machines embody a series of pairs of rolls through which the sheets are fed and the action of the rolls is such that the bran or other cleaning material is carried along with the sheets or plates from the front end of the machine where the sheets are introduced, to the back part of the box, and hence it is necessary to provide means whereby the bran may be discharged from the box and returned to the front end, it being desirable to use the bran over and over for cleaning purposes. The use or prac tice has been'to provide an outlet through which the bran can pass through the bottom of the box into a trough or receptacle from which it is elevated and returned to the front end of the machine. Such mechanisms consist of a plurality of conveying devices and.

are complicated and difficult to maintain in operative condition.

The object of the invention described herein is toprovide for the return of the bran in a substantially horizontal plane to the front end of the box, the return movement being'in a reverse direction and substantially parallel with the forward or cleaning movement of the bran by therolls. Theinven tion is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure 1 is a sectional elevation of a cleaning machine embodying my improvement; Fig. 2 is a transverse section, the plane of section being indicated by the l111e..IIVII, Fig.1, and'Fig. 3 is a sectional plan view on a plane indicated by the line IIIIII, Fig. 1.

In'thepractice of the invention, the machine, as regards the inclosing box 1, the pairs of'cleaning rolls 2, and the polishing rolls 3, is constructed in the nsual or any. suitable manner, except that 111 the bottom of the box are formed a plurality of open-- to troiwhs 4 extendin lon 'itudinall r of the box. Within these troughs are arranged screw conveyers 5 constructed and operated so as to move the bran, dropping lnto the trough, forward toward the front end of the r machine where the shaft of the conveyeris provided with a conical block 6, adapted to divert the bran upward between the front end of the box and the firstpair. of cleaning rolls. By the operation of this conveyer, the space between the front end of the boxgand' the first pair of rolls will be filled with a mass of more or less compacted. bran or other cleaning materlal, so that sheets fed into the box through the opening 7 pro-.

vided in its front wall, will be caused to pass through this mass of bran; and in between the first pair of rolls, which, as the space between such rolls and the front of the box is filled with bran, will carry portions of the,

latter in between the rolls and the sheets. In order to prevent the bran from escaplng through the opening 7, a plate Sfis so arranged across the said opening aste permit thefree inward movement of the sheets but.

to prevent any outward movement of the Provision is made for the discharge of the bran from the box by making a series of openings through the bottom of the troughs ad acent to the front ends ofthe machines,-

said openings 7 being normally closed 'by hinged doors 9 which may be-operatedby any suitable means, such forexample as that shown, consisting of a'shaft 10 havingfan operating handle 11 and provided with arms 12 which are connected'by links 13 to lugs 14 on the undersides ofv the doors. l

In order to prevent the bran from being drawn from between the pairs of rolls by the f oppositely moving return flow, the spaces between the adjacent lower rolls are closed by means of V-shapedpieces 15 supported by rods 16 extending up. through lugs 17 on the inner walls ofthe sides of'the box. These the surfaces of the adjoining.rolls thatsmall quantities of the bran in the pockets formed by adjacent, lower rolls and. the V shape d pieces, can passdown into the troughs 4:.

Theamount'thus allowedto escape should be approximately equal tothe quantity carried into-the pockets .bv the sheets androlls,

itbeing desirable that the level of the bran V-shaped pieces are so adjusted relative to '7 in the pockets should coincide with the I plane of movement of the sheets between the rolls. The V-shaped pieces are so supported as to permit of their easy removal and in practice it is found desirable to remove one or more of these pieces so that the first or secondpair of cleaning rolls at the rear of the series can be used as polishing rolls. A partition 18 is arranged transverse of the boxa suitable distance in the rear of the'last pair of cleaning rolls thereby forming a vertical passage through which bran can be dropped into the troughs 4. In this partition is formed an opening for the passage of the sheets between the supporting roll 19 and the brushes 20, whereby bran can be removed from the sheets before they pass between the polishing rolls 21. The troughs and conveyers are preferably extended under the brushes and polishing rolls for the reception and return of bran removed from the sheets by the operation of the brushes and polishing rolls.

In order to prevent the bran from so packing in the space between the front of the box and the first pair of rolls, so as to prevent its free upward movement, a stirring rod 22 is arranged in such space as shown in Fig. 1, consisting of a shaft provided with a series of projecting arms 23 preferably constructed in the form of propellerblades, but alternate arms being arranged with opposite inclination so as to prevent any transverse movement of the bran in this space.

It is preferred to operate the feed rolls of this machine by a gearing arranged in a housing described and claimed in an application filed by me under date of April 21, 1917, Serial Number 163645. The conveyer shafts are provided at their rear ends with beveled gears 24 intermeshing with corresponding gears on a counter shaft 25 arranged across the end of the mechaine and operated in any suitable manner from the train of gearing in the housing. The stirring rod is also operated by any suitable connection from this gearing.

, It has been proposed to arrange a screw conveyer in a tube located below the box in which the cleaning is effected, said tube extending from an opening in the bottom of the box at the rear end thereof to another opening adjacent to the front end of the box. This tubular conveying device is arranged on the median line of the machine 7 and hence there will not be any such lateral spreading of the cleaning material at the front end of the box as will insure a distribution over the entire surface of the sheets when passing through the cleaning rolls. And further, only so much of the copies of thispatent may be obtained for cleaning material as is swept from the sheets by the stripper is returned to the front of the machine.

It is characteristic of the improvement claimed herein that by the employment of open topped troughs, all material dropping below the cleaning rolls will be returned to the front of the machine, and as a plurality of troughs are employed, the material will be returned to the front in a plurality of lines and hence when a sheet enters the machine the cleaning material will be evenly distributed over the surface.

I claim as my invention:

1. In a sheet cleaning machine the combination of a box, a series of pairs of leaning rolls adapted 'to rotate in said box, a plurality of open topped troughs arranged below the cleaning rolls and means for moving material along said trough to a point in front of the first pair of cleaning rolls.

2. In a sheet cleaning machine, the combination of a series of pairs of cleaning rolls, means for moving the cleaning material in a direction the reverse ofthe movement of sheets being cleaned and in lines approximately parallel with the lines of movement imparted to the material by the sheets and rolls.

3. In a sheet cleaning machine, the combination of a series of pairs of cleaning rolls and means for moving the cleaning material from a plurality of points below the last pair of rolls in substantially straight lines to points in front of the first pair of rolls and upward into the path of movement of sheets into'the bite of the said rolls.

I. In a sheet cleaning machine the combination of a box, a series of pairs of cleaning rolls adapted to rotate in said box, a plurality of the conveyers arranged within the 7 box below the pairs of rolls and at an angle thereto and adapted to move the bran in substantially parallel lines to the front end of the box and means for forcing the bran and the first pair of rolls and a stirring rod arranged above the conical block.

In testimony whereof I have hereunto set my hand.

SAMUEL E. DIESGHER.

five cents each, by addressing the commissioncr cf latentl. Washington, D. c.

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