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Oct. 8, ì946° E. R. SWANN sUcTIoN CLEANER Filed oct. 15, 1945 ` ' s sheets-sheet 1 @at 8, 1946. E. R. swANN 2,409,078 SUCTION CLEANER FiledY Oct. 13, 1945 3 Sheets-Sheet 25 ‘75 §63 ` fßv’eßzlof” Edward já’. Saya/We @et 8, 194@ YE. R. swANN 2,409,078, sUcT'IoN CLEANER Filed Oct. l5, 1945 3 Sheets-Sheet 3 fifa/*veeg Patented Oct. 8, 1946 2,409,973 unirse s'rA'res PATENT Aorifice '2,499,078 `sperren CLEANER adware n. Swann, Fiorai rai-k, N. 1v., assigner@ The Hoover Company, North Canton, Ohio, a ~ corporation .of Ohio _` Application October 13, 1943, Serial No. 586,043 (Cl. 18S-71) l 2 The present invention relates to suction clean- Y 1 ers and more particularly to a älter and its ar. rangement in the suction cleaner. An object of the invention is to provide a new and improved suction cleaner. Another object is to provide a iilter having a corrugated ñlter ing area with ridges and depressions, the ends of the ridges terminating in the plane of the mar ginal edge of the ñlter for attachment in a suc tion cleaner. A further object is toprovide a filter formed of paper folded into a corrugated J filtering area and having the ends of the ridges folded into one plane surface. Another object is walls t2 and cooperates with the latter, the bot tom wall H and front wall I4 to form a com partment 26 for the reception of the dirt recep tacle l5. The dirt receptacle lhas a bottom wall 21, opposed sidewalls 28, rea-r Wall 29 and a front wall 3G, the side and rear walls having their -marginal -edges -outwardly flanged at 3l for en gagement with the casing side walls l2 and with the partition 25 to hold the receptacle in posi tion in the casing ID. A latch is mounted on the casing front wall i4 _and is provided with a piv oted arm 3‘2 which engages a catch 33 on the dirt receptacle front wall 30 to lock the recep tacle in the casing Hi. An air inlet conduit 35 is mounted on the dirt `receptacle front Wall 3% and communicates with an opening 36 in the latter exposed lto the dirt receptacle, while a flex ible hose El is removably connected to the con duit 35. A suitable surface cleaning tool 38, only to provide a method for foldin a sheet of paper into a corrugated ñltering area with the ends of the ridges folded and glued into the plane of the depressions to thus form the corrugated surface. Other objects and advantages of the invention will be apparent from the following specification and drawings, wherein: 20 partially shown, is connected to the opposite end Figure l is a longitudinal section of the suc of the hose Slforfcleaning -surfaces as is well tion cleaner and showing in dotted lines the suc tion cleaner cover and the ñlter supporting struc known in the art. Mounted within the cover Il between the side Walls is a partition 48, and secured to ‘the latter and depending walls of the cover I7 is an L shaped bracket 4| having a ñange 42 extending in one plane. «Spaced rods 43 extend longitudi nally of the cover I'I and have their yopposite ends ture in open position; Figure 2 is a section along the line 2_2 of Figure 1; Figure 3 is a section along the line 3_3 of Figure l ; Figure e is a fragmentary perspective View of 44 supported von the ñange 42 of the bracket 4|, the corrugated ñlter showing the ends of the> 30 and the intermediate portions 45 vof the rods 43 corrugations folded into the plane oi the mar- 1' . project beyond theplane ofthe ends of 4the rods ginal edge of the filter; Figure 5 is a fragmentary top plan View of the sheet of filter material prior to being folded, 43 into .the compartment .26 when the cover His closed. and Figure 6 is an end View of the corrugated ñlter showing the ends of the ridges folded and glued in the plane of the marginal edge of the ñlter. The embodiment of the invention herein dis closed comprises a suction cleaner provided with a rectangular casing lâ having a bottom wall li, a pair of opposed side Walls l2, a rear Wall £3 and a front wall irl, the latter being provided with an opening for the removable reception of a dust and dirt receptacle l5, and the bottom Wall Il being formed at its longitudinal corners with projecting ribs forming a pair of runners I6 which Support the cleaner. The casing is closed by a cover il’ pivoted at i8 on the rear casing wall I3 and is provided at its front end with a latch Iâ which removably engages a catch 2li mounted on the casing front wall i4, and a han die 2| is mounted on the cover il for carrying the suction cleaner. A partition 25 extends between the casing side A paper filter 4'! permeable to air, but not to' dust and dirt, is provided with >a corrugated ñl 35 . Y tering area having alternate longitudinally eX tending ridges 48 and `depressions 49. The paper ñlter is formed from -a single sheet .of paper 5t, as shown in Figures 4 to 6, and is folded along `the alternate .lines 5I to form the depressions 49 in the corrugated ñltering surface, and the paper is then folded along .the lines 52 to vform the ridges i8. Triangular areas 53 Vare provided at Ythe opposite ends »of the ridge lines 52 by a pair 45 of diverging lines 53 extending to the marginal edge of vthe paper, and the paper is -folded along the diverging lines 54 »over the shaded portions AE5 and glued Ytogether as indicated at 56, and the resulting adjacent Afolds 5l are glued to the por tion 58V of the paper as indicated at 59. By forming the adjacent folds 51 and gluing them together, that portion of the pa-per between the adjacent ridge lines 52 is drawn together which causes the paper to become corrugated forming 55 the ridges 48 and the depressions 4S. The trian 2,409,078 3 gular areas 53 being also glued at the marginal the filter 41 and thence through the elongated edge of the paper causes the triangular areas to be inclined from the marginal edge of the paper to the ridges 48 and serve to maintain the ridges opening 13 to the eye 16 of the fan chamber, and the air is expelled into the chamber 68 and 43 in projected position relative to the depres sions 49. It will be noted that the ridges 48 and thence through the ports 82 and 8l to ventilate the motor, and all of the air is exhausted through the air conduit 82. During the clean~ ing operation, the filter supporting rods 43 main depressions 49 terminate in one plane at the tain the ridges 48 in the filter 41 against the marginal edge of the filter. force of the air stream, and the force of the The filter 41 is supported in the casing I0 by placing the marginal edge on the flange 63 of a 10 latter maintains the depressions 49 in the filter. bracket 64 mounted on the casing front and side walls and the partition 25, and the ridges 48 of the filter project into the compartment 26, while Y the depressions 49 lie in the plane of the mar ginal edge of the filter 41. The rods 43 fit in the 15 ridges 48 of the filter and maintain the ridges in proper position against the force of the dir_t In order to clean the dirt receptacle the latch arm 32 isv rotated and the receptacle removed by pulling on the inlet conduit 35. When it is desired to remove the filter 41, the latch I9 is unlocked and the cover I1 raised to the dotted line position shown in Figure l, and the filter is removed from the fiat flanged surface 63 of the bracket 64. To replace the filter, the marginal laden air as it travels in the direction indicated edge of the latter is arranged on the flat flange by the arrows in Figures 1 and 3. The filter 41 is clamped at its marginal edge between the 20 63 with the filter ridges 45S projecting into the compartment 26, and thereafter the cover I1 is ñanges 42 and 63 of the brackets 4| and 64, closed whereby the rods 43 enter the ridges 48 of respectively, when the cover I1 is locked in posi the ñlter. When the latch I9 is locked, the tion. An air-tight seal is provided adjacent the marginal edge of the filter is clamped in one marginal edge of the filter by means of a rubber 65 supported in the bracket 64 and engages the 25 plane between the two flat flanges 42 and 63 of the brackets 4I and 64, respectively, and the fiange 42 when the cover I1 is locked in posi rubber 65 provides an air seal between the cover tion. I1 and the lower part of the casing. A compartment 68 is formed in the casing by I claim: the partition 25, the casing side walls I2, rear 1. A suction cleaner comprising a casing, a wall I3 and bottom wall II. A vertically ar 30 movable cover for said casing, a filter having ranged motor in the compartment 68 has its elongated corrugations including alternate ridges housing 69 provided with a flange 10 which is> and depressions each terminating at their op removably supported on a bracket 1I mounted on posite ends in one plane 'at the marginal edge the casing I I] and partition 25. Mounted above the motor on the armature shaft is a dual-stage 35 of said filter, cooperating means on said cover and casing each in one plane, closing said cover suction creating fan 12 enclosed in a fan housing clamping said marginal edge of said filter in one 13 supported by screws 14 on the motor housing plane, and a filter supporting frame mounted in 69. An annular bracket 15 positions the fan said cover and movable therewith, closing said housing 13 in the compartment 68 and provides an air tight seal between the upper end of the 40 cover positioning said frame only in the said ridges of said ñlter to support said ridges against fan housing 13 and the adjacent walls of the the force of said air stream and said depressions compartment 68. The fan housing 13 has a unsupported. fan eye 16 which communicates through a pas 2. In a suction cleaner, a casing having an fsageway 11 with an elongated opening 18 in the partition 40, the passageway 11 being formed by 45 opening, a filter closing said opening, said filter having elongated corrugations including alter the partition 40, cover I1 and the fan housing nate ridges and depressions each terminating at 13. Annularly arranged in the fan housing 13 their opposite ends in the same plane, means on are air outlet ports 19 which exhaust air _into which the marginal edge of said filter rests to the compartment 68 and thence to inlet ports 80' in the motor housing 69 from which the air is 50 -close said opening, and a filter supporting frame movably mounted on said casing and movable exhausted through ports 8l to thus cool the into operative position to arrange said frame in motor. The filtered air discharged by the fan said ridges of said filter but leaving said depres passes through an opening 83 connected to an sions unsupported, said marginal edge of said exhaust conduit 82 mounted on the casing rear wall I3, and an arcuate wall 84 guides the air 55 filter being the sole support of said ridges and depressions when said supporting frame is moved A hose 85, only partially to inoperative position. shown, may be connected to the conduit 82 when it is desired to clean surfaces by blowing air 3. In a suction cleaner, a casing having an as will be understood by those experienced in opening, a filter removably closing said opening, the art. 60 said filter having elongated corrugations includ~ In operation, assume the casing cover I1 is ing alternate ridges and depressions each ter closed and the motor and fan operating. The minating at their opposite ends in the same plane, suction caused by the rotating fan draws dirt means for supporting the marginal edge of said laden air from the surface being cleaned through the cleaning tool 38, hose 31 into the compart 65 filter to close said opening, a cover plvotally mounted on said casing, a filter supporting frame ment 26 and the dirt-laden air strikes the sur carried by said cover and arranged with respect face of the filter 41 exposed to the dirt receptacle to said filter to support said ridges of said filter I5. The filter 41 removes the dirt and dust from but leaving said depressions unsupported when the air and the dirt particles drop into the re-v ceptacle I5 as indicated at 85. Heavy particles 70 said cover is in closed position, said cover mov -able to open position to remove said frame from of dirt may drop directly into the receptacle I5 said filter whereby said depressions and ridges without striking the filter 41 due to the enlarged are unsupported for removal of said filter from area of the compartment 26 relative to the hose lsaid marginal ñlter supporting means. 31. The filtered air passes through the air pas EDWARD R. SWANN. sageway 86 disposed between the cover I1 andl 75 to the opening 83.