US1772780A - Method of forming frames for metallic screens - Google Patents

Description

Aug. 12, 1930. J. MILONE METHOD OF FORMING FRAMES FOR METALLIC SCREENS- Filed Dec. 24, 1927.

INVENTOR 22% By Attorneys ture.

'tion of solid metal.

atented Aug. 12, 1930 UITED STATES LQUIS 3. MILONE, 0F NEWARK, NEW JERSEY, ASSIGNOB '10 ORANGE SCREEN COMPANY,

OF MAFLEWOOD, NEW JERSEY, A CORPORATION OF NEW JERSEY METHOD 0! FORMING- FBAMES FOR METALLIC SCREENS Application filed December 24, 1927. Serial No. 242,491.

This invention relates to metallic screens for windows, doors, and the like, of the type set forth in the patents to Arthur L. Otto,

Reissues No. 16,148 and No. 1,596,507. In

this type of screen the frame is formed of rails and stiles constructed of extruded aluminum or similar metal, and formed during the process of extrusion with screen-recelving channels in the sides thereof, and guide grooves'in the edges thereof. In the use of such extruded metal for window screens, the top and bottom sections do not require guide grooves, these being, in fact, detrimental, since they collect dust and dirt and interfere with the smooth and finished appearance of the screens. The same is true'of metallic doors and screens which are designed to r0- tate about a hinge or pivot rather than to slide in guides. For these purposes it has been proposed to omit the groove in the section, thus forming the major part of the sec- IVhile providing the proper finish this results in a screen which has unnecessary weight and strength, and which is consequently more expensive to manufac- It has also been proposed to extrude such sections with the body of the section in 4 the form of a closed tube, but such sections do not lend themselves to practical extrusion processes. The third method of closing such unnecessary grooves is to provide filler pieces which are either forced into the grooves or otherwise held in place, but such pieces also involve unnecessary expense and labor.

According to the present invention I extrude such sections in what may be said to be tubular form with the shape sufiiciently open to support an extrusion die through the slot thus provided, and after formation I close the slot by running the section through a. closing roll, or in any other suitable manner, so that the previously opened flanges are closed together with a single joint which can be made Figure 1 is a view of a detailof a metallic sufiiciently accurate so that the resultant appearance of the edge of the section is that of a closed section.

Referring to the drawings which illustrate several forms of the invention:

screen of the type referred to showing one form of the finished product.

Fig. 2 is a cross-section of the product on a scale which is enlarged as compared with Figure 1.

Fig. 3 is a cross-section of the form shown m Fig. 2, as the latter leaves the extrusion press.

dFig. 4 is a modified form having a round e e.

ig. 5 is a view of the section of Fig. 4 as extruded.

Fig. 6 is a cross-section of the form shown in Fig. 2 as extruded and shows a slightly-different method of production.

Fig. 7 is a section of a die and its supporting block, such as may be used in extruding the section of Fig. 3.

Referring first to Fig. 1, let A designate the top or bottom sectionot a metallic screen .of the type set forth in said prior patents, and

B one of the side sections. Both of the sections A and B are formed with a screen-retaining channel 0 in which the edges of the invention, formed with a hollow interior such as E, which usually approximates the size of the groove in section B. In the case of the section A, however, this groove is closed by a portion F or its equivalent, which in the particular form now bein described is a continuation of the lower fl ange G of the section bent around until it meets the upper flange H. In extruding this articular section the extruding dies are so formed as to produce a. structure similar to that shown in Fig. 3, wherein the portion F instead of extending at right angles to the lower side G, is formed at a more oblique angle, thereby leaving a space I between thetwo flanges. This space I permits the adequate support of the extruding die in the process so that no difiiculty is had during the extruding operation, while at the same time it lends itself readily to complete closure in finished form after the extrusion operation. Fig. 7 illustrates a cross-section of a die block which may be used in extruding the section of Fig. 3. In this figure M indicates the die block, N the die element which results in the space between the flanges G and H, and 0 indicates the support for this die. It will be observed that in extruding the two flanges G and H lie on either side of the die member support 0. Figure 7 illustrates a conventional type of die, which may be varied from, but. in any event while the actual extrusion operation is taking place the shape must be that which will permit the support for the die member to pass between the flanges. When the extrusion operation is completed so that the metal has been fully formed, the flanges may be closed in any well known manner. The degree of opening or separation of flanges may be that desired, but it is obvious that the greater the opening the greater bend the metal will be required to take during the closing operation. Hence, while not excluding wider separation of the flanges than that shown, I prefer to make this separation as small as practicable. This is particularly true in a case where the edge of the section in its final form is to be at right angles to the remainder of the section, since in closing the section it is diflicult, if not impossible, to support the structure from the inside so as to make a sharp bend. Hence, in this case, particularly if the corner edge J can be practically completely formed during extrusion, the resultant appearance of the article after bending is much improved. In Fig. 4 I have shown a construction in which the flanges G and H are both bent toward each other in curved form, such a section being well adapted for use in a screen or do'orwhich is hinged on top and bottom pivots as distinguished from outside or surface hinges.

Fig. 5 illustrates an appropriate form for extruding the section of Fig. 4C, the top and bottom flanges being given an original curve during the extruding operation, which facilitates bending to produce the symmetrical edge shown in Fig. 4.

Fig. 6 is another modification showing a method of extruding the section of Fig. 2,

wherein me upper flange H is elevated and the lower flange G and vertical flange F are originally formed at right angles to each other.

While I have shown and described several forms ofthe invention, it will be understood that I. do not wish to be limited thereto, since various modifications may be made therein without departing from the spirit of the invention.

What I claim is:

1a The method of producing a. section for a metallic screen frame or the hke,'which comprises extruding such a section by means including an exteriorly supported d e member, the section being formed with separated flanges one on either side of the die member support and subsequently bending the flanges into closed form.

2. The method of producing a section for a metallic screen frame or the like, which comprises extruding such a section with a. partially closed form, and subsequently clos- 111 it.

The method of producing a section for a metallic screen frame or the like, which comprises extruding a section having a screen-retaining channel in its side and a partially completed tubular portion at its edge, and subsequently bending the metal to complete the tubular form.

4. The method of producing a section for a metallic screen frame or the like, which comprises extruding a section having a screen=retaining channel in its side, a flange on one face and a flange on the opposite face, the latter being provided with an extension joined to it at an angle, and subsequently bendingsuch extension to substantially meet the first-named flange.

5. The method of producing a section for a metallic screen frame or the like, which comprises extruding a section having flanges of substantially uniform thickness and subsequently bending said flanges.

6. The method of producing a section for a metallic screen frame or the like, which comprises extruding a section by means including an exteriorly supported die member, said section having flanges of substantially equal width, said flanges being located on either side of the die member support and subsequently bending said flanges to produce a curved exterior.

7. A section for metallic screens or the like formed of extruded metal and having a hollow'\, edge portion, such edge portion being.

formed of two flanges, the edges of which lie close together to substantially close such hollow portion, and at least one of said flanges being bent to effect such substantial.

closing.

8. A section for metallic screens or the like formed of extruded metal and having a 1101- low edge portion, such edge portion bein formed of two flanges, at least one of said flanges beingbent to substantially close such hollow portion, and said section having on one side a screen-retaining channel.

9. A section for metallic screens or the like formed of extruded metal and having a hollow edge portion, such edge portion bemgformed of two flanges, one of which 1s w1der than the other, and is connected with the face of the section by a right angled bend, the ,edge of such flange lying along the ed e of he opposite flange so as to substantia yclose sin hollow portion.

10, A section for metallic screens or the like formed of extruded metal and having a hollow ed e gortion, such edge portion being forme 0 two flanges, such flanges bein of substantially equal width, the edges of w ich lie alongside of each other so as to substantially close said hollow portion.

11. A section for metallic; screens or the like formed of extruded metal and having a hollow edge portion, such edge portion being. formed of two flan es and at least one of said flanges being angu arly bent to substantially close said hollow portion.

In witness whereof I have hereunto signed my name.

LOUIS J. MILONE.

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