US2737263A - Vacuum cleaner filter bag - Google Patents

Description

March 1956 E. ANDERSON 2,737,263

VACUUM CLEANER FILTER BAG Filed Feb. 9, 1953 2 Sheets-Sheet l Tiql.

I 22 v INVENTOR fiv/z r4/VOE/PSO/V Z JM/MZZ #4 ATTORNEY March 6, 1956 Filed Feb. 9, 1953 E. ANDERSON VACUUM CLEANER FILTER BAG 2 Sheets-Sheet 2 25 32 22 39 2WWW LET 24/ Tlc s. 34

INVENTOR' A a-ATTORNEY United States PatentO VACUUM CLEANER FILTER BAG Emil Anderson, Briarcliif Manor, N. Y., assignor to Eiectrolux Corporation, Old Greenwich, Conn a corporation of Delaware Application February 9, 1953, Serial No. 335,775

1 Claim. (Cl. 183-51) My invention relates to disposable filter bags for vacuum cleaners of the type disclosed in my Patent No. 2,621,757 issued December 16, 1952. In that patent there is shown a container which includes a bag portion having a plurality of side walls, each wall having an extension at one end folded at right angles to the wall and overlapping similar extensions from the other walls to form a flat end portion of the bag. A disc of relatively stifii material, such as cardboard, is secured to this flat end portion, as by gluing, and the disc and end portion are formed with aligned apertures constituting an inlet to the bag. The aperture in the otherwise closed fiat end portion of the bag is formed at an intermediate point in the manufacture of the bag by folding the fiat end portion along a center line thereof and cutting out a semicircular piece, with the result that when the end portion is unfolded there is a circular hole therethrough.

However, this folding, cutting and unfolding the end portion involves additional steps in the manufacture of the bag, and also the cutout piece must be removed and disposed of.

In accordance with my present invention I make the extensions at the ends of the side walls of the bag of such length that they do not form a completely closed end portion, but on the contrary form an end portion which as initially made has an opening therethrough.

Further objects and advantages of my invention will be apparent from the following description taken in conjunction with the accompanying drawings in which:

Fig. 1 is a side view, partially in cross section, showing a container in accordance with my invention in place in a vacuum cleaner;

Fig. 2 is a side view of the container shown in Fig. 1, but in partially collapsed condition;

Fig. 3 is a side view of the same container in fully collapsed condition;

Fig. 4 is a top view of the container shown in the previous figures, but with certain inlet seding means omitted for the sake of clarity;

Fig. 5 is a View similar to Fig. 4, but shows the bag portion before the cardboard disc has been applied thereto;

Fig. 6 is an end view of the bag in expanded condition, showing seal means for the inlet opening thereof;

Fig. 7 is a cross-sectional View taken on the line 7-7 of Fig. 4;

Fig. 8 is a cross-sectional view similar to Fig. 7, but with the bag portion in expanded condition; and

Fig. 9 is a cross-sectional view taken on theline 9 of Fig. 4.

Referring to the drawings, and more particularly to Fig. 1,reference character 10 designates a disposable container in accordance with my invention in place within a vacuum cleaner. The vacuum cleaner includes a housing 12 within which the container is disposed. Amotor fan unit 14 is mounted in one end of the housing, while the other end may be closed by aremovable cover member 16. The cover member is provided with an 2,737,263 Patented Mar. 6, 1956inlet conduit 18 which, when the cover is in place, ex'

tends some distance into the housing 12. The outer end hose may be connected by the inlet conduit. Operation of the fan serves to draw air and entrained dust inwardly through the inlet conduit to within the container 10.-

The bag portion of this container is preferably made of flexible or pliable paper which is pervious with respect to air, but impervious with respect to dust. Consequently, the air passes through the walls of the bag portion, while the dust is retained therein.

Thecontainer 10, as above stated, comprises a bag portion having a first pair ofside walls 22 and 24 and a second pair ofside walls 26 and 28, all four of these walls being best shown in Fig. 9. Theside walls 26 and 28 are formed with longitudinally extendingcenter creases 30 and 32, whereby these walls may be folded fiat between theWalls 22 and 24 when the container is in collapsed condition. This bag portion is made from an initially fiat sheet of paper, the longitudinal edges of which are secured together by aseam 34 in theside wall 24.

When the bag is in expanded condition, as is shown in Figs. 1 and 8, the side walls of each pair are disposed parallel to each other, while the side walls of the different pairs are disposed substantially at right angles to each other.

The left-hand ends of the side walls, as viewed, for example in Fig. 5, are formed with extensions which, when the bag portion is in extended condition, extend inwardly and substantially at right angles with respect to the side walls. Thus, theside walls 22 and 24 are formed withextensions 36 and 33, respectively, while theside walls 26 and 23 are formed withextensions 46 and 42, respectively. As will be seen particularly in Fig. 5, the length of each extension is less than one half the distance from the respective side wall to the other side wall of the same pair, thus forming arectangular opening 44 in the fiat end portion of the bag.

Secured to the fiat end portion, as by means of a suitable adhesive 46, is a fiat comparativelystiff disc 48 of cardboard or the like having a preferablycircular aperture 50. It will be noted that the diameter of this aperture 5% is less than the space between the inner ends or edges of theextensions 40 and 42, but is greater than the space between the inner edges ofextensions 36 and 58. Consequently, portions of theextensions 36 and 33 extend within the boundary of the aperture 56) and, in order that they will not interfere with the introduction of theinlet conduit 18, these extensions are formed withslits 52 and 54, respectively, which permit the extensions to be bent or folded out of the way by the inlet conduit as shown in Fig. 8, the bending taking place along lines, such as the broken line 55 in Fig. 5.

In order to provide a self-closing seal for the inlet to the container, a sheet of stretchable andelastic material 56 is secured, as by gluing, to the outer surface of thedisc 48. This sheet is formed with ahole 58 of preferably oblong configuration which is normally much smaller than theaperture 50 in the disc. Thereis also provided astrip 60 of light cardboard or the like lies along the side of the conduit and at the same time the sheet material is stretched so as to enlarge the hole- 58 sufficiently to accommodate the inlet conduit, as is shown in Fig. 1.

Thereafter, when the front cover is.

enemas removed andthe inlet conduit withdrawn, thehole 58 returnsto its original smallsize'andstraightensoutthc strip 60 which continues to extend through the hole so as to provide a substantial seal therefor, as is clearly shown 1 in .Fig. -"6.

-'It will be noted that-thestrip 60 is disposed parallel to theinner-ends oredges of theextensions 36 and 3S and that the distance between these extensions is great r than the width of the strip. This is desirable, as otherwise the eXtensions-migh interfere with the strip being straightened out and properly sealing the hole 51% when the inlet conduit is withdrawn.

It will be also noted that the adhcsive i is'so-placed on theextensions 36 and '38 that it does not extend inwardly beyond the outer boundary of theaperture 50 in the disc, as otherwise it might adhere to the'clasticsheet 56 and interferewith the proper stretching of this material upon insertion of the inlet conduit.

The end'of the bag portion, opposite from thedisc 48, is'closed by having the side walls folded over on themselves several times and glued, as shown at 64.

While I have shown one more or less specific embodiment of my invention it is to be understood that this has been done for purposes of illustration only and is not tobe construed as limiting the scope of my invention, which is to be determined from the appended claim.

What I claim is:

A disposable dust container for a suction cleaner,

said container including a bag composed of pliable poroussheet material of porosity to permit the passageot air but to preclude the passage of dust particles therethrough, said bag having a plurality of pairs of side walls, the walls of each pair being substantially parallel to each other and disposed at an angle to the walls of any other pair, said sheet material forming an extension at one end of each side wall and being folded inwardly substantially at right angles to the respective wall, said extensions being disposed in overlapping relationship to form a flat end portion, reach of said extensions having a length less than one half the distance between the respective side wall and the other side wall of the same pair whereby an opening is provided through said end portion, and a flat end member of relatively stir'f material secured to said end portion and having an aperture communicating with said opening and with the interior of said bag.

References Cited inthe file of this patent UNITED STATES PATENTS 808,170 Rogers t. Dec. 26, 1905 921,664 Bates May 18, 1909 2,528,332 Bergquist Oct. 31, 1950 2,574,683 Anderson ;Nov. 13, 1951 2,596,807 Dippel May .13, 1952 2,596,808 Lofgren May 13, 1952

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