US1713809A - Method of making screens - Google Patents

Description

METHOD OF EAKING SCREENS Filed March 15, 1926 2 Sheets-Sheet l 1 N VEN TOR. fir-367 31?- 442266 ATTORNEY.

y 21, 1929- H. b. ALLEE. 1,713,809

METHOD OF MAKING SCREENS Filed March 15, 1926 2 Sheets-Sheet '2 IN V EN TOR. flfffiffi Z HZZte WAW v A TTORNEY.

Patented May 21, 1929.

stares HERBERT D. ALLEE, 0F DETROIT, MICHIGAN.

METHOD .OF MAKING SCREENS.

Application filed March 15, 1926. Serial No. 94,975.

ihe invention relates to screens and has among its objects the provision of a simply constructed durable and cheaply manufactured screen.

A further feature of the invention resides in providing a method of making a plurality of screens affording less expensive production. Thus, with my invention, a plurality of screens may be constructed, opposite border frames being provided to make up a number of screens connected integrally as by the screen material. By thus building up a plurality of screens, the separate screens may be severed from each other by a simple cutting operation. I

Nith these and other objects in View, the invention resides in the novel features of construction and combination and arrangements of parts as more fully hereinafter described and claimed.

Referring to the accompanying drawings in which like reference characters indicate corresponding parts:

Figure l represennts the initial step in the manufacture of the screens; 7

Figure 2 is a perspective view showing one of the side border frame bars;

Figure 3 is a sectional view along 3-3 of Figure 2;

Figure f is a fragmentary view in cross section illustrating the application of the side border frame bars to the screen material;

Figure 5 is a view corresponding to Figure 1 with the side border frame bars applied to the screen material;

Figure 6 is a detail sectional view along (3-6 of Figure 5 showing a side border frame bar in clamped engagement with the screen material;

Figure 7 is a fragmentary perspective view illustrating the next step in the manufacture of the screens including mitering the side frame bars;

Figure 8 is a plan View showing a transverse border frame bar;

Figure 9 is a fragmentary View showing the transverse frame bars applied to the screen material;

Figures 10, 11 and 12 are sectional views along 10-10, Til-11 and 12-12 respectively of Figure 9;

Figure 13 is a perspective view illustrating the final step in the process consisting of severing the finished screens, and

Figure 14 is a plan view illustrating a completed screen.

in the drawings reference character A represents a table or like support over which is extended a strip of screen material B. For convenience, the screen material may be unwound from a roll of screen material C which may be supported by suitable brackets 10 from the table A. The strip of material B has a width substantially corresponding to one dimension of the finished screen product and the initial step in the method consists in extending this strip of material over the table A for a length of twenty or thirty feet for example, depending upon the number of screens to be made at a time.

The next step in the operation consists in providing a pair of substantially U-shaped sheet metal, side border frame bars I), which, as shown in Figures 2 and 3, particularly, are slotted transversely at 11, and mitered, the spacing of these slotted formed portions substantially corresponding to the other desired final dimension of the screen. The projections 12 preferably have their ends return-bent at 13 and spaced apart sufficiently to freely receive the screen material B therebetween. As shown in Figure 8, the slots 11 preferably extend along the projections 12 as far as the inner extremities of the returnbent portions 13. As shown in Figures 4t and 5 these side border frame bars I) are moved inwardly toward each other so as to engage the opposite longitudinal edges of the strip of screen material B between the projections 12. i

The next step in the operation consists in moving together the projecting ends 12 of the frame bars D so as to clamp therebetween the screen material. This may be accomplished in any suitable manner such as by running rollers or other tools longitudinally along the inner extremities of the frame bars Before the frame bars D are applied to the screen material I prefer to miter the portions of the frame bars D adjacent the slot 11 as shown at 1st in Figure 7, although when found more convenient, the mitering may be done after application of these frame bars to the screen material. The frame bars D may then be positively secured to the screen material, as by spot welding at suitable points 15.

For bordering the remaining opposed sides sponding to the U-shaped side border frame bars D. As shown in Figure 8, the ends of the frame bars or elements 16 are mitered, at 18 to conform with the mitered portions '14 The next step in the operation consists in placing the transverse frame elements 16 and 17-atopposite sides of the screen material respectively so as to engage therebetween the the screen material with the ends of these elements in facecontact with the mitered portions 14. J By reason of such construction-the.

frame members on opposite sides of, the screen material are brought to lie substantiallyin a common plane.

Thetrans verse frame elements 16 and 17 maythen be welded to each other and to the screen material by spot welding at suitable points19. Also the corner construction may be spot'welded as indicated at20.

At'this point in the method of manufacturing the screens it will be noted that a plurality of screens have been formedflntegrally connected by the continuous strip of screen material B and also by the portion 21 of the side frame bars D at the extremities of the slots 11. 1

The final step in the method may consist in severing the screens'from each other and this may be conveniently accomplished by severing means such as the blade 22 pivotally supported at 23 or otherwise suitably guided along the edge of table A. The finished connected screens arethus moved along the table until. the slots llregist'er with the path of movement of blade 22, at which time the end screen maybe severed by the blade and the next screen'moved into severing position as will be readily understood. In Figure 14 I have illustrated the finished screen. be apparent thatafter the last screen has been severed the strip of screen material will have again beenmoved over table A. from the roll of material C ready for the next series of operations in making up anoth r set or series of screens. 7

It should be understood that my improved screenmay, if desired, be constructed by other methods of manufacture than that described above. It must also be apparent that if desired, the various steps of manufacture such as I have outlined for purposes of'illustration may be followed in other thanthe particular sequence that I have described.

While it is believed that-from the foregomg description, the nature and advantage of my invention will be readily understood,

It will sorted to when desired as fall Within the scope of the claims.

lVhatlclaimas myinvention is-:

1. The method of manufacturing screens consisting in providing a strip of screen material sufficient for a plurality of screens of the final desired dimension, applying border mensions, applying a' border frame along the longitudinal edges of said material and transversely of the material, the spacing of the transverse border frames corresponding to one desired dimension of the screen and final- 1y severing the strip of screen material by cutting the same transversely at the said transverse border frames to form a plurality of screens.

1. The method of manufacturingsubstantially rectangular screens consisting in providing a strip of screen material suiiicient for a pluralltyof screens of the final desired dlmensions, the width of the strip" corresponding substantially to one desired dimension of the finished screens, applying'a border framealong the opposed longitudinal edges of the strip'and transversely of the strip of material at a plurality'of points along its length spaced. to correspond substantially to the other desired dimension of the screens securing the border frames'to the screens, and

v finally cutting the strip transversely to form a plurality of finished screens.

5. The method of manufacturing substanmension of the screen securing. the border frames to the screens, feeding thestrip'intermittently and cutting thestrip transversely at periods of rest of the strip to sever the completed screens.

6. Themethod of manufacturing screens which consists in inserting the longitudinal edges of a length of screen material in preformed border members, arranging cross members on opposite sides of the screenmaterial transversely thereof and at a plurality iso of longitudinally spaced points, securing the cross members to the screen material and to each other, and subsequently cutting the length of screen material adjacent the cross members to form a plurality of screens.

7. The method of manufacturing screens which consists in preforming a pair of longitudinal border members, inserting the longitudinal edges of a length of screen material in the preformed border members, securing the border members to the said screen material, transversely slotting the border memhere at a plurality of predetermined points, preforming a plurality of transverse frame members, mounting these transverse frame members transversely of the screen material and at opposite sides thereof adjacent the slots in the border members, securing the transverse frame members to the screen material and to each other, and subsequently cutting the screen material adjacent the transverse frame members to form a plurality of individual screens. I

8. A step in the process of manufacturing screens, which consists in applying transverse frame members to the opposite sides of a length of screen material, securing opposed pairs of these transverse frame members to the screen material and to each other and severing the length of screen material adjacent the said transverse members.

9. The method of manufacturing screens which consists in applying a border to a length of screen material, applying a plurality of transverse members to the length of screen material, and subsequently severing the length of screen material adjacent the said transverse members.

10. The method of manufacturing screens which consists in preforming a pair of border members, inserting the longitudinal edges of a length of screen material in the preformed border members, slotting the border members at a plurality of predetermined points, mitering the border members adjacent the said slots, preforming a plurality of transverse border members, arranging these transverse border members in pairs transversely of the screen and on opposite sides thereof, and with their ends in engagement With the mitered portions of the longitudinal border members, and subsequently severing the length of screen material between each pair of transverse border members.

11. The method of manufacturing screens, which consists in securing to a length of screen material longitudinal and transverse border members to form a plurality of individual screens joined to each other by means of intermediate portions of the screen material and subsequently transversely cutting the intermediate portions of the screen material to free the individual screens.

12. A step in the manufacture of screens which consists in securing to a length of screen material and intermediate the ends thereof a plurality of transverse border members in spaced relation to each other longitudinally of the length of screen material.

In testimony whereof I afiix my signature.

HERBERT D. ALLEE.

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