US1688630A

US1688630A - Strainer screen and method op making same

Info

Publication number: US1688630A
Authority: US
Publication date: 1928-10-23
Anticipated expiration: 1945-10-23

Description

P. MUELLER STRAINER SCREEN AND METHOD- 0F MAKING SAME Filed OCT.. 24, 1925 alici mugs.'

Patented Oct. 23, 19218.

UNEF@ PHILIP MUELLER, F DECATUR, ILLINOIS, ASSIGNOR TO ADOLIH MUELLER, TRUSTEE, OF DECATUR, ILLINOIS.

STRAINER SCREEN AND METHOD OF MAKING SAME.

Application filed October 24, 1925.

The present invention relates to strainer screens such as are used in strainers ot' lt-he type disclosed in my Patent No. 1,370,147, dated Mar. 1, 1921, and it has for its object to provide a screen blank, a screen, and a method of making the same by which screens can be produced at reasonable cost, both with respect to mechanical operation and stock, with a resulting etlicient and dependable screen structure, the replacement of which may be effected at small cost.

In' order that the development may be clear to those skilled in the art, I have shown in the accompanying drawings one physical embodiment ot my invention, but this is merely illustrative of the invention and not restrictive. j

In said drawings:

Fig. 1 is a view of a blank from which the screen is made.

Fig, 2 is an edge view to show one step in the method of forming the screen.

Fig. 3 is a similar view showing the screen in process of formation.

Fig. el illustrates another step of the method.

Fig. 5 is a view in vertical section of the completed screen.

Referring to the. drawings by numbers, like numbers indicating like parts in the several views, Fig. 1 shows the blank 1() from which the screen is formed. The blank is cut as shown from any suitable screen stock of appropriate mesh, and is preferably formed in substantially the shape of a sector of a band with curved lower and upper edges, and straight ends, although it may take other shapes. The upper edge of this sector is cut as shown, so as to give a series of leaves or foliations 11, the tips ot which are rounded as at 12. The ends 13 and 14 of the blank will project beyond the line of the leaves 11, one of these ends 14 projecting to a greater extent than the other, so as to provide stock for forming the interlocked seam of the completed strainer, all asswill appear hereinafter.

The blank thus formed will be bent as shown in Fig. 3, where the method of bending the blank in its initialstep is indicated. As there shown, the leaves 11 will be intolded .so as to lap, one over theJ other, so that, when Serial No. 64,695.

brought to final position, they will overlie each other and close the top of the screen. Owing to the fact that the blank 10 in the preferred torni, is cut as a sector ot a band, it will take, in its completed form, a conical` shape, the top ot which, as stated, is closed by the intolded, overlapped leat section 11.

The end 18 of the blank 10, as shown in Figs. 2 and 3, will be bent up substantially at right angles to the body of the blank, while the extended end 14 will be bent upwardly at substantially right angles, and then its ei;- treme end bent downwardly so as to torirL an interlocking seam 15 to receive the end 14- of the blank. lVhen the screen is brought to its final form for side seaming, the end 13 will be bent downwardly and hooked into engagement with the seam 15 ot' the extended end 1d, as shown in Fig'. 1, and in this form placed upon a mandrel 16 having a groove 17 to receive the interlocked ends 18 and 1st of the screen. In this position of the screen upon the mandrel, the interloeked seam will be subjected to the pressure of an appropriate tool 18 of proper contour to compress and set the seam, and owing to the fact that the groove 17 of the mandrel receives the seam, the compression ot' the tool 18 will torce the seam interiorly ot' the screen and leave the screen with its outer surface in a smooth unbroken circumference so as to avoid any crevices in which matter suspended in the water flowing through the screen can lodge and collect, and ensure an unbroken, continuous seating contact of the screen in its seat, as shown in Fig. 5.

rIhe screen thus formed is entirely closed, both at its side and at its top where the leaves 11 are `t'olded one over the other, and these folded and overlappedv leaves may be subjected to compression, if desired, so as to set them in their linal interleaved condition.

The screen in this condition will then he mounted upon its supporting rod, as shown in Fig. 5. riChe supporting rod 19 will be passed through the overlapped leaves 11, but, prior to thrusting the end of the rod 19 through the leaves. there will be threaded upon it a disk or washer 2O which will beheld in place in any suitable manner, but, preferably as here shown, by compressing the rod 1S) just below the Washer so as to throw out a holding protuberance or burr 9,1 which will hold the washer 2l) in proper position. The end of the rod 19 which is thrust through the top ot the screen will extend suficiently beyond the screen to permit a second washer 2Q to be threaded thereon, and then the extreme end oi the rod will be upset as shown, to provide a protuberance or burr 23, which will lock the Washer Q2 in place, and the screen will be held securely between the Washers.

In event of the screen becoming corroded and worn, it may be very readily and quickly replaced by simply removing the washer 22, placing a screen upon the end of the rod, replacing the Washer, and upsetting the end of the rod. As a matter of fact, the cost of rod 19 and Washers 2O and 22 is so small that itis contemplated., vvh en replacements are necessary, in strainers for which the screen 4is designed, to replace a corroded or damaged screen by a complete screen and supporting rod.

Screens made in accordance with my method and l'folloiving the construction illustrated and described may be very rapidly and cheaply constructed by unskilled labor, and With a minimum of mechanical devices, it being necessary only to have equipment which will blank out of suitable stock the screen blank, provide t-he necessary seaming tools tor forming the ends, and the mandrel and stamp ttor closing the interlocked screen.

Such minor changes in construction as are 'Within the skill of the mechanic may be made and still be Within the range of my invention.

I claim:

1. A st 'ainer having a body-portion of reticulated material, and a leaf integral with said body-portion bent over and closing an end ot said body-portion.

2. A strainer having a body-portion of reticulated material, and leaves integral With said body-portion bent over in lapped relation and closing an end ot said body-portion.

3. A strainer having a bodysportion ot reticulated material formed at its ends to torm a continuous side Wall, and leaves integral with said body-portion bent over in lapped relation and closing an end of said body-portion.

Ll. A. strainer having a body-portion ot reticulated material lock-seained at its end to form a continuous side Wall, and leaves integral with said body-portion bent over in lapped relation andclosin g an end ol said body portion.

5. A strainer having a body-portion of reticulated material lock-seamed at its ends to form a continuous side Wall, leaves integral with said body-portion bent over in lapped relation and closing an end ot said bocly-portion, and fastening means for said leaves.

6. A strainer having a body-portion of reticulated material lock-seamed at its ends to form a continuous side wall, leaves integral with said body-portion bent over in lapped relation and closing an end ot said bod7n portion, and fastening means passing through said lapped leaves.

7. A strainer having a body-portion ot' reticulated material lock-seemed at its ends to form a continuous side Wall, leaves integral with said body-portion bent over in lapped relation and closing an end ot' said bodyportion, and a strainer supporting rod ther upper end olE which engages and astens said lapped leaves.

8. A strainer having a bodysportion of reticulatcd material lock-seamed at its ends to form a continuous side Wall, leaves integral with said body-portion bent over in lapped relation and closing an end of said body-'portion, and a. strainer supporting rod the upper end of which passes through and tastens said lapped leaves.

9. A strainer formed of a single piece ot' reticulated material vvith a side seam joining its ends disposed interiorly of the strainer to give an unbroken exterior Wall and infolded overlapped leaves closing one end.

10. A strainer blank of reticulated material having a plurality of integra-l leaves projecting from its edge.

11. A strainer blank of reticulated material having a plurality ot' integral leaves with rounded ends projecting from its edge.

12. A strainer blank of reticulated 1naterial having a plurality of integral leaves at an edge and seam forming sections at its ends. i

-13. A strainer blank of retic-ulated material having a plurality of integral leaves at an edge and seam forming sections of unequal lengths at its ends.

1a. A sector-shaped strainer blank of reticulated material having a plurality of integral leaves projecting from one edge.

15. A sector-shaped strainer blank of reticulated material having a plurality of integral leaves projecting' from its concave edge.

16. The method ot making strainers, which consists in forming a blank with integral lea-ves at one edge, bending the blank to shape, securing the ends of the blank together, and infolding said integral leaves in overlapped relation.

17. The method of makingT strainers` which consists in ,torining a blank with integral leaves at one edge, bending the blank to shape, lock-seaming the meeting ends of the blank together, intolding said integral leaves in overlapped relation, and fastening such overlapped leaves together.

18. The method of making strainers, which consists in forming a blank with integral leaves at o ne edge, bending the blank to shape, lock-seaming the meeting ends of the blank together With the Aseam lying Within the strainer, infolding said integral leaves Within the strainer, nfolding said integral in overlapped relation, and fastening such leaves in overlapped relation, and securing 10 overlapped leaves together. suc-h overlapped leaves together by a strainer 19. The method of making strainers, which supporting rod passed therethrough.

consists in forming a sector-shaped blank In testimony whereof I have hereunto set with integral leaves at one edge and end pormy hand.

tions of unequal lengths, look-seaming the end portions together with the seam Wholly PHILIP MUELLEB.