US478179A - wandel - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

G. WANDEL. STRAINER FOR CHEMICAL WOOD PULP.

No. 478,179. Patented July 5, 1892.

(No Model.) 3 Sheets8heet 2. 0. WAND-EL. STRAINER FOR CHEMICAL WOOD PULP.

No. 478.179. Patented July 5, 1892.

me Now (No Model.) 3 Sheets-Sheet 3. C. 'WANDEL. STRAINER FOR GHEMIGAL WQOD PULP.

, PatentedJu lffi, 1892;. a Y w Ja /a1 l UNITED :ii iS'lATES PAT NT OFFICE of the same, which may then be employed for inafter more particularly described, and which consists, mainly, of a rotating cylinder. proeasily intelligible, I refer to v theaccompany- ,CHRISTIALN'IWANDEL, or,

REUTLINGEN, GERMANY.

srncrrlcarroiv rermin path is Letters Patent No. 478,179, dated July 5, 1892.

' AppIicationfiled-TuIyZ-B,1889. jewel Slaves. (nu-made.)

To all whom it mag concern:

Be it known that I, CHRIsrrAuWANDEL, a

subject of the King of VVurtemberg, and a resident of Reutlingen, Germany, have. invented certain new and usefullmprovements in Strainers for Chemical Wood Pulp, of which the following is a full, clear, and exact description.

My present invention consists of a strainer for 'Wood pulp for use in the paper industry; and its object is to remove all impurities from the said pulp and thus sort out the finest part manufacturing all the superior sorts of paper up to the very finest qualities, while the coarser pulp, with the impurities contained therein, may be employed either in the same state in which it is separated or after againhaving been sorted for making packing-paper and inferior papers generally. I attain this object by means of the apparatus herevided with fine slots along its entire surface and having interior wings, such cylinder being caused to revolve in a vat or trough containing the unsorted pulp mixed with a large quantity of water. The trough is provided with suitable inlets for the pulp and water, which are caused to pass through the slotted cylinder, by which means all the coarser parts and impurities are separated out, as the slots in the cylinder are not wide enough to allow them to pass through.

In order to make this specification more ing drawings, in which similar letters denote similar parts throughout the several views.

Figure 1 is a longitudinal section through the center of the apparatus. Fig. 2 is a plan; Fig. 3, an end elevation, and Fig. 4 a section on line A B in Fig. 2.

The pulp mixed with a large quantity of water is passed into the trough a through the inlet a. In this trough a is mounted the cylinder or drum 1), which is perforated throughout with slot-s or fine slits c, said cylinder being mounted on the horizontal shaft 17', running in the bearings b 22*, arranged at each end of the trough. The drum 1) has circular outlets at each end concentric with the shaft and opening into the channels 6 e, which join to form one common channel fin front of the apparatus, Fig. 2.

In order to'prevent communication between thechamber or trough a and the outlet-channels e e fi'the drum ends are mounted in the stuffing-boxes and glands g 9, so that the drum-perforations form the only com munications between the chamber a'and the outlets. .The'drum b is further provided with interior longitudinal blades 61 (1, arranged as shown in Fig. 4. These blades run the whole length of the drum and are made to slant inward at an angle preferably of about forty-five degrees to a tangent passing through their point of juncture with the inner periphery of the drum. At the bottom of the trough a a channel or gutter his arranged, having a hinged cover 1.

When the apparatus is at work, this cover is open and all the coarser particles of pulp, as also the impurities which are unable to pass the perforations of r the drum, sink to the bottom of the'trough and by the motion 'of the drum will be carried into the gutter it.

By closing the cover t' and removing the plug level up to about the height shownin Fig. 4.

The drum is set inquick rotation by means of suitable connect-ions and sheave-pulleys C O. The wings or fans 'd' cl now suck the water and pulp through the slotted drum b, which, however, only admits the finest particles of cellulose, keeping out all coarser particles and impurities. The wings on the interior of the cylinder have the purpose of preventing the pulp from depositing at the bottom, and, furthermore, of keeping up a sharp circulation of the liquid toward the center of the drun1i. 9., toward the outlets-thus preventing the finer particles which have entered the drum from eventually passing out again at the bottom. As the outlets of the drum are considerably larger than the inlets (slots c) to the same, the liquid-level in the trough a will be always higher than that in the drum, so

that the possibility of particles escaping which have once entered the drum through the slots is excluded, the only exit being at w 00.

Having now particularly described and ascertained the nature of my invention, what I claim is- 1. In an apparatus for straining chemical wood pulp, the combination of the trough a, having mounted therein arotary drum 1), perforated with slots 0 and provided with interior wings rl cl, said drum. having centrallyarranged outlets in its ends leading out of the trough a, stuffing-boxes and glands g g for preventing communication between the drum-outlets and the interior of the trough a, and suitable means for rotating the drum 19, substantially as described.

2. In an apparatus for straining chemical wood pulp, the combination of the trough (1, having outlet-passages e e f and having the gutter h and cover'i, arranged as described,and clearing-hole 7a with a rotary drum b, having perforations c and interior wings d d and having its centrally-arranged end outlets a; m communicating with the outlet-passages e e of the said trough a, the stuffing-boxes and glands g g, and suitable means for rotating the said drum, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CHRISTIAN WANDEL.

Witnesses:

OHR. GRosINGER, EMIL REEG.

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