US2630190A

US2630190A - Filter bag for suction cleaners

Info

Publication number: US2630190A
Application number: US204617A
Authority: US
Inventors: Cordray Belle
Original assignee: Hoover Co
Current assignee: Hoover Co
Priority date: 1951-01-05
Filing date: 1951-01-05
Publication date: 1953-03-03
Anticipated expiration: 1970-03-03
Also published as: GB698024A

Description

March3, 1953 B. CORDRAY 2,630,190

FILTER BAG FOR SUCTION CLEANERS Filed Jan. 5, 1951 3 Sheets-Sheet l Fig.1

INVENTOR Del-[e Cordrag ATTORNEY.

March 3, 1953 B. CORDRAY 2,530,190

FILTER BAG FOR SUCTION CLEANERS 7 Filed Jan. 5, 1951 I 3 Sheets-Sheet 2 INVENTOR. Belle COYdJCLIJ BY ATTORNEY.

March 3, 1953 Filed Jan.

B. CORDRAY FILTER BAG FOR SUCTION CLEANERS 3 Sheets-Sheet 3 INVENTOR. Belle COT'CLT'CLIJ Patented Mar. 3, 1953 FILTER BAG FOR SUCTION CLEANERS Belle Cordray, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a corporation of Ohio Application January 5, 1951, Serial No. 204,617

2 Claims. (Cl. 183-51) This invention relates to a dirt filtering bag for suction cleaners and more particularl to a simplified structure and method of making the bag.

Filter bags at present embodied in tank type suction cleaners are formed from two pieces of material, one for the cylindrical wall and the other for the closed end wall. It has been the practice to first sew the longitudinal edges forming the cylindrical side Wall and thereafter stitch the end wall to one edge of the annular side wall. The second sewing operation requires constant rotation of the end wall and the cylindrical wall with respect to the needle station in order to form the annular seam. During this operation the operator can stitch only a small portion of the annular seam and the sewing machine must be stopped and started several times to adjust the material for each short stitching operation before completing the annular seam between the end wall and side wall of the bag.

It is therefore an object of the invention to provide a filter bag to reduce the sewing time and also the handling between successive stitching operations. Another object is to provide a filter bag by sewing the side wall material to the end wall material and thereafter stitching the side wall into cylindrical form. A further object is to provide a filter bag by so cutting the end wall that the blanks forming the bag are more easily manipulated with respect to the needle station during the sewing operation. A further object is to provide a filter bag by cutting a radial slit in the end wall material to permit the sewing of one end of the side wall material to the end wall in substantially one continuous stitching operation, and thereafter securing the slit and longitudinal edges of the side wall together in substantially one stitching operation. Another object is to provide an improved filter bag for suction cleaners. Gther objects and advantages of the invention will be apparent from the following description and drawings, wherein Figure l is a side elevation partly in section of a tank type cleaner having the improved filter Figure 2 is a plan view of the two pieces of material from which the bag is made;

Figure 3 is a plan view of the material forming the bag end wall provided with a radial out prior to sewing;

Figure 4 is a perspective view of the stitching operation attaching the side wall material to the end wall material; and

Figure 5 is a perspective view of the completed filter bag.

Figure 1 discloses a filter bag It embodied in a tank type cleaner comprising an elongated casing I I closed at its exhaust end by a cap 12 having a port l3, and its inlet end is closed by a re- 2 movable'cap l4 having a port 15, and the cap I4 is attached to the casing II by a latch 16. The ports [3 and I5 are adapted to receive one end of a hose provided at its opposite end with a suitable surface cleaning tool. The casing is supported ona pair of skids H and is provided with a carrying handle I8. Within the casing H is a motorfan unit l9 supported at its opposite ends by frames 20 and 2 I, both of which are provided with openings 22 for passage of air. The dirt filtering bag It is provided at its open end 23 with an expansible wire frame 24 for attachment to a bag ring 25 removably held in position by the front end cap It. In operation of the cleaner, the bag Ii] filters the dirt from the dirt laden air stream entering the opening 15 and the cleaned air is then discharged through the outlet l3.

The filter bag IE3 is made from two blanks 3i] and 3| of suitable cloth or other dirt filtering fabric, the blank 39 forming the closed end wall and the blank 3| providing the cylindrical side wall. The blank 31! has a peripheral edge 35 substantially equal to the girth of the bag l0, and the blank 3! has opposite end 3% and 31 of a length equal to the peripheral edge 35, and the longitudinal edges 33 and 39 are substantially the length of the completed bag It.

The first step in constructing the bag it is to cut the blank 38 as indicated at All in a radial direction to a point short of the center 4| to provide cut edges 32 and 43.

The two blanks are then placed in a sewing machine with the cut edge 42 in line with the longitudinal edge 38 and the peripheral edge 35 is then stitched to the end 35 of the blank 31 to form a seam 44. At the end of this sewing operation, the cut edge '33 will be alined with the longitudinal edge 39 of the blank 3|. During this sewing operation, the

cut edges

42 and 53 are spread apart to assist the operator in adjusting the arcuate edge 35 of the blank 30 with the straight edge 3'5 of the blank 3 i. In addition, the cut 483 permits the cut edges 62 and 3 to be spread apart and prevents the blank 3! from forming a complete cylindrical wall as the seam 44 is being completed near the cut edge 43, and thus does not interfere with the operators line of vision in stitching the last portion of the seam 44. The

cut edges

52 and 43 also permit the end wall material to be spread apart so that the operator can easily arrange and line up the blanks 30 and 3! as the seam 44 is being stitched and thus reduces handling and interruptions in adjusting of the material during the sewing operation.

The next step comprises overlapping the

longitudinal edges

38 and 39 of the side wall material and placing the free end 31 under the needle to stitch a seam 46 in a straight line without interruption during the sewing operation. When stitching of the seam 46 approaches the

cut edge

42 and 43 in the end wall 30, the operator laps the

edges

42 and 43 and arranges the latter in a straight line with the sewed portion of the seam 46 to stitch an end wall seam 41 in a substantially straight line sewing operation with the side wall seam 45. If desired, an overcasting stitch may be provided at 49 and 50 to prevent raveling of the exposed edges.

The bag wire clamp 24 is sewed in a hem Ii at the end of the bag by the seam 52. The wire clamp 24 is expanded by compressing its opposite ends 5353 together to attach the bag on the bag ring 25 for insertion in the cleaner casing.

From the foregoing, it is apparent I have provided a filter bag which eliminates stitching in arcuate directions and as a result reduce the number of interruptions to adjust the material during the sewing of each of the seams.

While I have shown and described but one embodiment of my invention, it is to be understood that that embodiment is to be taken as illustrative only and not in a limiting sense. I do not wish to be limited to the particular structure shown and described but to include all equivalent variations except as limited by the scope of the claims.

I claim:

1. A dirt filtering bag adapted for use with a material forming the side wall and another piece of filtering material forming the end wall 01 the bag, said end wall material secured at its periphery to the end periphery of said side wall material, said end wall material cut inwardly from its periphery and secured together to complete the end wall of the bag, and the meeting edges of said side wall material secured together to complete the side wall of the bag.

2. A dirt filtering bag adapted for use with a suction cleaner, comprising one piece of filter material forming the side wall and another piece of filtering material forming the end wall of the bag, said end wall material cut inwardly from its periphery, the original periphery of said end wall secured to the end of said side wall material, the meeting edges of said cut end wall and the meeting edges of said side wall material secured together to complete the bottom and side walls of the bag.

BELLE CORDRAY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,129,105 Spence Sept. 6, 1938 2,174,730 White Oct. 3, 1939 2,268,352 Taylor Dec. 30, 1941 2,364,069 Hahn Dec. 5, 1944