US2620045A

US2620045A - Suction cleaner bag

Info

Publication number: US2620045A
Application number: US245343A
Authority: US
Inventors: Elmer C Binggely
Original assignee: Hoover Co
Current assignee: Hoover Co
Priority date: 1951-09-06
Filing date: 1951-09-06
Publication date: 1952-12-02
Anticipated expiration: 1969-12-02

Description

Dec. 2, 1952 E. c. BINGGELY 2,620,045

sucTIoN CLEANER BAG Filed Sept. 6, 1951 3 Sheets-Sheet 1 INVENTOH. Elmer C. Binggelg TTORNE Y.

Dec' 2, 1952 E. c. BINGGELY 2,620,045

SUCTION CLEANER BAG Filed Sept. 6, 1951 3 Sheets-Sheet 2 I I I I I I I I' I I I I I I I I I I I I l I I INVENTOR. Elmer C. Binggelg 7%? 5" ATTORNEY.

Dec. 2, 1952 E. c. BlNGGl-:LY

SUCTION CLEANER BAG 3 Sheets-Sheet I5 Filed Sept. 6, 1951 INVENTOR. Elmer C. B'mggelg fu? 5" i ATTORNEY.

Patented Dec. 2, 1952 SUCTION CLEANER BAG Elmer C. Binggely, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a

corporation of Ohio Application September 6, 1951, Serial No. 245,343

(Cl. 18S-51) Claims.

The present invention relates to suction cleaners and more'partioularly to an outer envelope for supporting an inner dirt ltering bag.

In suction cleaners employing an inner filter bag and an outer enclosure, the inner bag is usually formed of paper or other fragile materials which must be supported in some manner at its lower end where the dirt accumulates to prevent failure of the inner bag caused by the collected dirt.

It is an object of the invention to provide an outer enclosure for an inner lter bag to reinforce the latter and prolong the use of the bag. Another object is to provide an outer envelope for an inner dirt ltering bag, the outer envelope having pleats secured together to conne the inner bag at its dirt accumulating portion and permitting full inflation of the remaining portion of the inner bag.

Other objects and advantages of the invention will be apparent from the following description and drawings wherein:

Figure 1 is a side View, partly in section, of a suction cleaner with a double bag;

Figure 2 is a view of the outer bag when uninilated and removed from the cleaner body;

Figure 3 is a view of the inner and outer bags showing their contours when inflated;

Figures 4, 5 and 6 are sectional views along the lines 4 4, 5 5 and 6 5 of Figure 2 showing the-` stitching for securing the bag pleats, and

Figures 7, 8 and 9 are sectional views along the vided by` the stitched pleats when the inner baglis inflated.

The embodiment of the invention herein Vdisclosed comprises a suction cleaner body I0 having a surface cleaning nozzle II communicating through a passageway I2 with a fan eye I3 of a fan chamber I4 provided with an exhaust passageway I5. A housing I5 encloses an unshown motor for driving a fan I1 and a pulley I8 connected by a belt I3 to an agitator 20 rotatably mounted in the nozzle II. The cleaner body is supported by front and rear wheels 2| and 22 respectively, and is provided with a pivotally mounted handle 23.

A bag ring is removably attached to the end of the exhaust passageway I5 by a clamp 26 and pivotally supports a bag adapter 21 having a projecting tubular portion 28 connected to the bag ring 25 by a flexible bellows 29. The inner bag 30 is formed from paper or other suitable dirt filtering material and is provided in its mouth 3| 2 with a valve 32 of flexible material which telescopes the tubular member 28 and has a projecting portion 33 to prevent dirt from falling downwardly into the tubular member 28. The bag mouth 3| of the inner bag is removably attached to the tubular member 28 by a band 34 actuated by a lever 35, and the dirt emptying opening at the opposite end is closed by a removable clamp 33.

The outer bag 48 is formed of cloth or other suitable filtering or non-filtering material and has its lower end 4I attached to the bag ring 25 by a clamp 42 and its upper end is supported from the handle 23 by spring 43. An opening 45 extends longitudinally of the bag 40 and has a slidable fastener 46 providing for access to the bag clamp lever 35 to removably attach the inner bag 30 to the adapter 21.

The lower portion of the outer bag 4-0 is provided with pleatsI 43 to 5I and

exterior Walls

52 and 53. The pleats 48 to 5I are each formed of folded

portions

54 and 55. The expansion of the pleats 48 to 5I is controlled by stitch lines 55 which extend from the lower end of the bag at the open ends 51 of the pleats, as shown in Figure 4, and then upwardly and inwardly as shown in Figure 6 to the closed ends 58 of the pleats. The stitching 58 of the pleats, as shown in Figures 4 and '1, prevent the pleats 48 to 5I from expanding and constricts the outer bag relative to the adapter. As shown in Figures 5 and 8, the stitch lines 5B extend partially into the pleats 48 to 5I to permit enlargement of the bag to intimately engage the inner bag and support the latter and the weight of the dirt collected in the bag 38. At Figures 6 and 9, the stitch lines 56 are at the closed ends 58 of the pleats whereby the folded `

material

54 and 55 of each pleat is completely expanded to further enlarge the cross section of the bag and also support the inner bag 30.

Although Figure '1 shows the pleats 48 to 5I projecting inwardly of the bag, they are placed in the dotted line positions to provide the lower end 4I of the outer bag with a plurality of thicknesses of material to reinforce the bag mouth at its attachment to the bag ring 25. Also in Figure 8, the inwardly projecting pleats 48 to 5I1 assume the dotted line positions when the inner1 bag 30 is inflated.

In order to removably attach the inner bag to the adapter 21, the slide fastener 46 is moved downwardly to the bag clamp 42 and the outer bag is telescoped downwardly below the bag clamp lever 35 whereby the latter can be operated to remove and attach the valve 32 about the tubular not in a limiting sense.

member 28 which supports the lower end of the bag. If it is desired to remove dirt from the inner bag the clamp 36 at the upper end of the bag is removed.

When the nozzle is moved over the surface to be cleaned, the suction created by the fan l1 draws the dirt laden air through the nozzle Il and discharges it through the exhaust passageway l5 into the inner bag 39. The blast of air passing through the tubular member 28 into the inner bag causes the latter to expand. However, the expansion of the inner bag is controlled bly the stitch lines 55 in the pleats of the outer bag. The pleats have a limited expansion adjacent the valve 32 and the tubular member 28 of the adapter 21 to provide a cross sectional area of bag material which `will intimately contact the inner bag and support the latter so that the bag 30 is not subjected to the full blast of the air passing therethrough. 'Ihat portion of the outer bag above the stitch lines 56 is allowed to inflate to the full material of the bag to thereby support the inner bag throughout its area.

From the foregoing it will be perceived that the pleats Yin the outer bag are stitched to provide a gore tapering upwardly from the mouth of the bag to permit the pleats to gradually expand to their full area and support the inner bag. In addition, the provision of equal pleats throughout the length of the outer bag permits stitching the pleats to form the desired contour without the necessity of cutting the bag material into a reduced section at the bag mouth, and consequently the time for manufacture of the outer bag is greatly reduced.

While I have shown but one embodiment of myV invention it is to be understood that this embodiment is to be taken as illustrative only and Y I do not wish to be limited to the particular structure shown and described but to include all equivalent variations thereof Yexcept as limited 4by the scope of the claims.

I claim: Y 1. Ajfilte bag assembly having an inner and an outer bag for attachment to the dirt exhaust passageway of a suction cleaner comprising an innerA bag of filtering material having a reduced bag mouth for entrance of dirt laden air and an enlarged dirt collecting portion, and an outer bag enclosing said inner bag, said outer bag having a plurality of pleats extending longitudinally of said inner bag, said pleats having equal folds of material throughout their lengths, and fold securing means extending at an Vangle from the open ends of said foldslto the closed end of said folds adjacent said dirt collecting portion of said inner bag to provide gradual expansion of said outer bag with respect to said inner bag and engage and support the latter at said dirt collecting portion.

2. The lter .bag assembly dened in claim 1 wherein said fold securing means comprises stitched lines extending at an angle from the open ends of said folds to the closed ends of the latter.

3. 'An expansible filter bag for suction cleaners, said bag having a plurality of pleats extending longitudinally of said bag, and means securing the folds of said pleats at an angle from the open ends of said folds to provide a constricted opening atthat portion of the folds secured at the outer ends, and gradually increasing the cross section of said bag as said securing means terminate at the inner ends of said folds.

4. A lter bag assembly having an inner and an outer bag for attachment to the dirt exhaust passageway of a suction cleaner comprising an inner bag of filtering material having a reduced bag mouth for entrance of dirt laden air and an enlarged dirt collecting portion, and an outer bag enclosing said inner bag, said outer bag having a pair of connected pleats extending longitudinally of said inner bag, means securing the folds of each pleat and extending at an angle from the open end of each fold to the closed end of each fold, said securing means extending along said mouth and dirt collecting portion of said inner bag to provide for gradual expansion of said pair of pleats with respect to said inner bag-and engage and support the latter at said mouth and said dirt collecting portion.

5. An expansible filter bag for suction cleaners comprising pleats extending from the mouth of saidY bag and longitudinally thereof, said pleats having equal folds'of material, and means securing the open ends of said folds at the'mouth of said bag to reinforce said mouth, said-securing means extending at an angle fromY said reinforced portion at said open ends of said folds inwardly of said bag to the inner-ends of said folds to provide for gradual expansion of Vsaid folds to increase the'cross section o f said bag.

ELMER C. BINGGELY.

vREFERENCES CITED o The following references are of record in the le of this patent: Y

UNITED STATES PATENTS