US3596443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner filter bag
Assignee: MODERN DUST BAG CO Inc
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Filing: 1969-10-29
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Granted: 1971-08-03
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Expires: 1989-10-29
Abstract
Abstract The present invention pertains to a new and novel bag construction and the method of making same. The bag is formed of a flexible sheet material and has fold lines thereon, whereby the bag is formed by folding the same on the fold lines and results in the formation of a self-opening square construction. The bag may also have side pleats to result in a small compact bag which is readily expansible, which is readily adapted for manufacture on existing machinery and is particularly adapted for use in the manufacture of disposable vacuum cleaner filter bags.
Inventors
- 👤 Howard Zev Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:59
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; Y; Y10; Y10S; Y10S55/00; Y10S55/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
A vacuum cleaner filter bag having a closed flat bottom and inlet means formed from a blank comprising at least one ply of flexible sheet material, such as paper, said sheet including a plurality but not more than four fold lines extending transversely thereof and a plurality of longitudinal fold lines along at least one of the longitudinal side edges of said sheet, said transverse fold lines being disposed at the central portion of said sheet and longitudinally displaced from the center thereof, said sheet being folded upon said longitudinal fold lines to form a plurality of longitudinally extending side pleats and upon said transverse fold lines to form a plurality of sections disposed in selectively secured superposed relationship along at least a portion of said longitudinal side edges so as to form said bag with at least one pleated side, the length of one of said sections in the flat folded condition being equal to the effective length of the other sections, and said central portion of said sheet comprising the closed flat bag bottom.
Claim 2
Dependent Claim
176 words
A vacuum cleaner filter bag having a closed flat bottom and inlet means formed from a blank comprising at least one ply of flexible sheet material, such as paper, said sheet including a plurality but not more than four fold lines extending transversely thereof and a plurality of longitudinal fold lines along at least one of the longitudinal side edges of said sheet, said transverse fold lines being disposed at the central portion of said sheet and longitudinally displaced from the center thereof, said sheet being folded upon said longitudinal fold lines to form a plurality of longitudinally extending side pleats and upon said transverse fold lines to form a plurality of sections disposed in selectively secured superposed relationship along at least a portion of said longitudinal side edges so as to form said bag with at least one pleated side, the length of one of said sections in the flat folded condition being equal to the effective length of the other sections, and said central portion of said sheet comprising the closed flat bag bottom.
Claim 3
Dependent Claim
53 words
The bag according to claim 1, wherein said inlet means comprises an aperture formed in one of said sections, the ends of said sheet being secured with respect to one another to seal the open top end of said bag, and said aperture being adapted to cooperate with a vacuum cleaner inlet element.
Claim 4
Dependent Claim
53 words
The bag according to claim 1, wherein said inlet means comprises an aperture formed in said pleated side edge, the ends of said sheet being secured with respect to one another to seal the open top end of said bag, and said aperture being adopted to cooperate with a vacuum cleaner inlet element.
Claim 5
Dependent Claim
35 words
A bag according to claim 1, wherein said sheet is formed having a plurality of longitudinal fold lines along each of the side edges thereof and thus a plurality of pleats on each side thereof.
Claim 6
Dependent Claim
35 words
A bag according to claim 4, wherein the number of longitudinal fold lines on each side of said sheet are equal to thereby form an equal number of pleats on each side of said sheet.
Claim 7
Dependent Claim
36 words
A bag according to claim 4, wherein the longitudinal fold lines formed along at least one of the side edges of said sheet are unequally spaced from each other to thereby form pleats of unequal width.
Claim 8
Dependent Claim
59 words
A bag according to claim 4, wherein the number of longitudinal fold lines formed along one of said edges of said sheet are different from the number of fold lines formed along the other of said side edges thereby forming a different number of pleats on one side of said sheet than on the other side of said sheet.
Claim 9
Dependent Claim
38 words
A vacuum cleaner filter bag according to claim 3, wherein said aperture traverses one of said longitudinal fold lines and is partially disposed in one of said pleats and partially in another pleat immediately adjacent sAid one pleat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |