US2752086A

US2752086A - Disposable bag for vacuum cleaners

Info

Publication number: US2752086A
Application number: US435478A
Authority: US
Inventors: William W Freschl
Original assignee: MODERN DUST BAG CO Inc
Current assignee: MODERN DUST BAG CO Inc
Priority date: 1954-06-09
Filing date: 1954-06-09
Publication date: 1956-06-26
Anticipated expiration: 1973-06-26

Description

June 26, 1956 w. w. FRESCHL 2,752,086

DISPOSABLE BAG FOR VACUUM CLEANERS Filed June 9, 1954 INVENTOR. I/V/LL/AMWFPESCHL ATTORNEY United States Patent 9 nrsrosABLE BAG FOR VACUUM CLEANERS William W. Freschl, Pelham, N. Y., assignor to Modern Dust Bag Co., Inc., West Haverstraw, N. Y., a corps ration of New York Application June 9, 1954, Serial No. 435,478

Claims. ((1229-55) The invention relates to filter bags of specially prepared paper and such as are commonly utilized in connection with collection of dust in the use of well known so-called tank or canister type (or cylindrical) vacuum cleaners. As is well understood, such bags are disposable after a period of use and must be replaced at frequent intervals, depending on the frequency of use of the cleaner. Bags of this nature are sold in large quantities and are designed to meet the various sizes (openings) of tank of the cleaners olfered by different manufacturers. While the variation in size required may not be very large, yet it requires that different bag sizes be made available.

It is an object of the present invention to provide a bag for use, with the aforesaid types of vacuum cleaners, which is adjustable readily to all tank openings, so that but one size bag need be stocked by a distributor, and as Well a savings in the manufacture thereof be effected.

A further object of the invention is to provide a disposable bag which does not involve in its manufacture die-cutting of the seating member thereof with consequent waste of material; also, which requires no sewing operations.

A still further object of the invention is to provide a novel bag with adjustable mouth and which will admit of compact folding, whereby storing and shipment thereof are facilitated.

In carrying out the invention, the novel bag, which is designed for temporary use only, is constructed of suitable filter material and is provided with a mouth opening conforming to the top opening of the cleaner apparatus through which it is inserted for support by means of a flange of a seating member of novel design and pro vided on the bag to outline generally the mouth opening of said bag. The latter is provided to this end with oppositely disposed lateral infolds extending from the bottom edge of the bag substantially to the seating member. This member, however, is not attached permanently throughout its entire length to the open end of the bag, but is interrupted, the one end terminating at the outer line of an infold while its opposite end is detached from the bag substantially at the intermediate inner line of the infold to provide an unattached extension portion. This is adapted to overlap and become secured to the said one end when it is juxtaposed thereto, the exposed flange surface at said one end for a length bearing a pressure-sensitive adhesive, whereby the desired adjusted opening of the bag may be maintained.

The nature of the invention, however, will best be understood when described in connection with the accompanying drawings, in which:

Fig. 1 shows in isometric projection a bag with infold spread and the seating member ends separated.

Fig. 2 is a fragmentary similar view, but with the seating member closed.

Fig. 3 is an end view of the bag with seating member attached thereto.

Fig. 4 is a fragmentary vertical section, taken on the line 44, Fig. 3, and looking in the direction of the arrows.

Fig. 5 is a plan view of the novel bag folded into a compact package.

Referring to the drawings, the novel dust bag comprises a container portion 10 of the conventional material, such as a prepared, light but tough filter-type paper (36-35 lbs. per standard ream) possessing high air flow and filter properties; and a spread and supporting or seating member 11. The bag is provided with at least one and, preferably for compactness and to facilitate packaging of the bag, with two lateral tucks or

infold portions

12 and 13 of conventional form. Thus, the bag at opposite sides is turned inwardly along two separated

fold lines

14 and 15 extending from the bottom of the bag to its top edge 16, and creased along an intermediate and inner fold line 17, likewise extending from the bottom of the bag substantially to its top edge.

To extend the mouth 18 of the bag as Well as to provide a means whereby the bag may be seated over the opening of a tank or canister (not shown) of the conventional type of vacuum cleaner, there is attached to the inside of the bag along its mouth edge 16 a more or less pliable annular seating member 20 which is sufiiciently stiff to maintain the desired shape. For example, it may be constructed of a strip of suitable material such as liner board or plastic sheet. The said annular member is provided with a flange 21 designed to extend outwardly over edge 16 and thus provide a means for seating the bag. The member 20 is designed to conform the opening of mouth 18 to the desired shape for use; but, in accordance with the invention, is not attached throughout its entire length to the bag, nor endless. This is to afford a limited adjustment with respect to the mouth opening so as to accommodate a bag of one size to tank and like type vacuum cleaners of different sizes of mouth opening.

The said member 20 to this end may thus be secured, as by means of a suitable adhesive, from the one outer line 14 of an infold entirely around the opening to the intermediate line 17 of said infold only, and the detached portion 22 of said member made of a length somewhat greater than half an infold or the distance of the free edge of the bag between said intermediate fold line 17 and outer fold line 14. By this expedient, the portion 22 may overlap the juxtaposed flange portion 23 at the fold line 14 which has (Fig. 2) a portion 24 thereof of the exposed surface of its flange coated with a pressure-sensitive adhesive 25 such as that manufactured by National Adhesives and known commercially as #3655. Or, the same may be applied to the undersurface of the flange of said portion 22 (not shown), whereby member 29 may be united variously to close the mouth to the desired adjustment of opening (Fig. 2 of the drawings) by exerting manually moderate pressure upon the flange of said portion 22 overlapping. The bag is then read3 to be fitted to the particular tank (not shown) for use; and when filled is disposed of and replaced.

To expedite the fitting, it is preferred to corrugate the portion of member 24} below its flange, in order to reduce the effective circumference at the lower edge thereof, and more especially by making said corrugations wider and deeper toward said lower edge.

I claim:

1. A bag of the nature set forth, having an infold gusset portion extending from its bottom substantially to the top edge; and a seating member of relatively stiff material attached to the bag at its top edge and along the inner face of the bag, said member being flanged above said edge with the flanged portion extending outwardly over the edge to afiord in the use of the bag a support therefor, and the said seating member being interrupted substantially at the infolded portion and having an unattached end portion overlapping the attached edge portion whereby an adjustment of the mouth opening over substantially one-half-the width of the infold portion is possible, and the said unattached portion of the member being adapted to overlap the juxtaposed attached portion over its exposed upper flange surface which is coated with a pressure-sensitive adhesive for securing of the unattached portion variously to the upper juxtaposed surface of the seating member to maintain the selected bag opening thereat.

2. A bag according to claim 1, provided with two oppositely disposed lateral infolds, and wherein the mouth of the bag is substantially circular and the seating member substantially annular.

3. A bag according to claim 1, wherein the seating member extends at one end to one of the outer fold lines of the infold and at its other end is attached to the bag only up to substantially the intermediate inner fold line of the infold, the unattached portion being of a length greater than the width of the free edge of the bag between the said one outer fold line of the infold and its intermediate line of fold.

4. A bag according to claim 1, wherein the seating member beneath the flange is corrugated substantially vertically to reduce the circumference of the bottom edge.

5. A bag according to claim 4, wherein the corrugations are tapered in being wider and deeper toward the bottom edge.

Wolf Sept. 24, 1940 Osterdahl Dec. 17, 1940