US3503308A - Method of manufacturing end closures for a vacuum cleaner dust bag - Google Patents

Method of manufacturing end closures for a vacuum cleaner dust bag Download PDF

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Publication number
US3503308A
US3503308A US3503308DA US3503308A US 3503308 A US3503308 A US 3503308A US 3503308D A US3503308D A US 3503308DA US 3503308 A US3503308 A US 3503308A
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Prior art keywords
disc
flaps
strip
vacuum cleaner
dust bag
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William S Henry
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Electrolux Corp
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Electrolux Corp
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Assigned to FIRST NATIONAL BANK OF BOSTON, THE reassignment FIRST NATIONAL BANK OF BOSTON, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EL ACQUISITION CORPORATION
Assigned to FIRST BOSTON SECURITIES CORP., WESRAY CAPITAL CORPORATION, FIRST BOSTON MEZZANINE INVESTMENT PARTNERSHIP - 9, BANCBOSTON INVESTMENTS INC.,, WELLS FARGO & CO. reassignment FIRST BOSTON SECURITIES CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELECTROLUX CORPORATION A CORP. OF DE.
Assigned to FIRST BOSTON SECURITIES CORP., FIRST BOSTON MEZZANINE INVESTMENT PARTNERSHIP - 9, BANCBOSTON INVESTMENTS INC., WESRAY CAPITAL CORPORATION, WELLS FARGO & CO. reassignment FIRST BOSTON SECURITIES CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELECTROLUX CORPORATION
Assigned to EL ACQUISITION CORPORATION, N/K/A ELECTROLUX CORP. reassignment EL ACQUISITION CORPORATION, N/K/A ELECTROLUX CORP. RELEASE OF SECURITY INTEREST Assignors: BANKBOSTON NA
Assigned to ELECTROLUX CORPORATION reassignment ELECTROLUX CORPORATION RELEASE OF SECURITY INTEREST Assignors: BANCBOSTON INVESTMENTS, INC., FIRST BOSTON MEZZANINE INVESTMENT PARTNERSHIP - 9, FIRST BOSTON SECURITIES CORP., WELLS FARGO & CO., WESTRAY CAPITAL CORPORATION
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1436—Connecting plates, e.g. collars, end closures
    • A47L9/1445—Connecting plates, e.g. collars, end closures with closure means
    • A47L9/1454—Self-sealing closures, e.g. valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F16K15/035—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member with a plurality of valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • F16K15/1441—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery with biasing means in addition to material resiliency, e.g. spring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/962—Closure, e.g. tie string, valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/02—Vacuum cleaner bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/05—Methods of making filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7845—With common biasing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/788—Having expansible port
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7898—Pivoted valves
    • Y10T137/7901—Valve head movably connected for accommodation to seat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49861—Sizing mating parts during final positional association
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49945—Assembling or joining by driven force fit

Definitions

  • Disposable paper dust collectors for vacuum cleaners are known from US. Patents 2,483,169, 2,547,805 and 2,596,808. These collectors consist of a filter bag having a relatively stiff closure plate to which an open end of the bag is attached.
  • the closure plate is usually composed of a pair of cardboard discs which are ultimately adhered together.
  • One of these discs has an opening therein which is in register with a plurality of flaps formed in the other disc by die cutting.
  • Sandwiched between the disc is an elastic member sandwiched between the discs and having a band portion overlying the flaps adjacent the part line thereof.
  • the invention relates to the method of manufacturing a dust bag end plate having flaps for closing an opening in the end plate to prevent the escape of. dirt from the associated bag when it is removed from the vacuum cleaner for disposal.
  • the method according to the invention comprises bending at least the disc having the flaps which make up the end plate to form an arc and securing an elastic strip or band to the bent disc in overlying relation with the flaps as a chord of the arc.
  • the band or strip is stretched thereby pretensioning the elastic member which imparts a more positive closing force to the flaps than an elastic strip or band which is in a relaxed condition when the flaps are closed.
  • a primary object of the invention therefore is to provide a method of attaching an elastic band to the end closure for a vacuum cleaner dust bag so that it is under tension at all times.
  • Another object of the invention is to provide an improved method of manufacturing end closure plates for vacuum cleaner dust bags in which an elastic flap closing member is in tension when the flaps are closed.
  • FIG. 1 is an exploded, schematic perspective view of an end cover plate consisting of a pair of discs bent in accordance with the invention.
  • FIG. 2 is an end view of the cover plate of FIG. 1 showing the elastic strip in place as a chord of the arc of the bent cover plate.
  • FIG. 3 is a perspective view showing the disc seen in FIG. 1 as they are being folded into juxtaposition.
  • FIG. 4 is an exploded perspective view similar to FIG. 1 of a modification of the invention.
  • FIG. 5 is an end view of FIG. 4 showing the elastic strip in position as a chord of the arc of the bent cover plate.
  • FIG. 6 is a somewhat enlarged view showing the plate discs of FIG. 5 after having been folded and just prior to forming the end cover plate by securing the disc in juxtaposition.
  • FIG. 7 is a schematic sectional view of a method of attaching a rubber band or strip to a cardboard disc.
  • FIG. 10 generally identifies a dust bag closure plate consisting of a pair of cardboard discs 11 and 12 joined together by a fold line 13.
  • the disc 11 is provided with an opening 14 which is large enough to receive a suction tube of a vacuum cleaner (not shown) as illustrated in the above cited prior art.
  • the disc 12 is die cut to form a pair of flaps 15 integral therewith and hinged to the associated disc by a score line 16.
  • the flaps may be dimensioned to pivot into the opening 14 or they may pivot away from the opening 14 depending on which way the discs 11 and 12 are folded and to which disc the filter bag is attached.
  • FIG. 10 generally identifies a dust bag closure plate consisting of a pair of cardboard discs 11 and 12 joined together by a fold line 13.
  • the disc 11 is provided with an opening 14 which is large enough to receive a suction tube of a vacuum cleaner (not shown) as illustrated in the above cited prior art.
  • the disc 12 is die cut to form a pair of flaps 15 integral therewith and hinge
  • the elastic strip 20 is attached to the lower surface of the disc 12 with the opening or slit 21 of the strip 20 coextending with the part line 18 of the flaps.
  • the flaps When the flaps are opened along the cut parting line 18 in a downwardly direction (as viewed in FIG. 1) the flaps project into the slit 21 as they pivot into opening 14 and into a filter bag (not shown) which is attached to the underside of disc 11 when it is folded under disc 12 as seen in FIG. 3 in which case the disc 11 would be juxtaposed below the disc 12 and the strip 20 would be sandwiched between the juxtaposed disc.
  • the elastic strip 20 forms a chord of the are defined by the bent disc 12 and as noted above the bands of strip 20 on each side of slit 21 overlie the flaps.
  • the discs are juxtaposed and united by adhesive to form an end closure plate the disc 12 is unbent or straightened out thereby stretching the strip 20.
  • FIGS. 4, 5 and 6 the disc 11' and 12 are bent into an are along an axis normal to the bend axis of the plate 10 as shown in FIG. 1 since with the part line 18' extends in a plane normal to the fold line 13 in FIGS. 4-6 whereas in FIG. l3 the parting line 18 is parallel to the fold line 13.
  • the strip 20 has been shown attached to the associated disc by a suitable glue or cement.
  • FIG. 7 the strip 20 is shown being attached to a disc 30 by means of stakes 31 which wedge the strip 3 20' into suitably dimensioned recessed 32 when the stakes are forced into the recesses.
  • This method of attaching the strip 20 to a disc has the advantage that no curing or setting time is required as in the use of glue or adhesive and by making the stakes 31 of cardboard material the strip 20' is not pierced or torn as is the case if staples are used to secure the strip on a disc.
  • the elastic strip can tear when highly stressed by the flaps if a staple is driven through it in which event one or both of the flaps may not be closed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Making Paper Articles (AREA)
  • Vacuum Packaging (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Description

3,503,308 W. S. HENRY METHOD OF MANUFACTURING END CLOSURES FOR March 31, 1970 A VACUUM CLEANER DUST BAG FllQd March 28 1967 "II, A II'I'IIIIIIIIIL 1',
wuflzr gg un BY $4 H15 ATTORNEY United States Patent METHOD OF MANUFACTURING END CLOSURES FOR A VACUUM CLEANER DUST BAG William S. Henry, Stamford, Conn., assignor to Electrolux Corporation, 01d Greenwich, Conn., a corporation of Delaware Filed Mar. 28, 1967, Ser. No. 626,617 Int. Cl. B31d /00 US. Cl. 93-1 4 Claims ABSTRACT OF THE DISCLOSURE In order to pretensioning an elastic strip which overlies a pair of flaps hinged on a disc of a dust bag closure plate, the disc having the flaps is bent so that it forms a semicircle or arc, and the elastic strip is applied as the chord of the are. When the bent disc is straightened the elastic strip is elongated slightly providing a pretension therein to more positively close the flaps.
BACKGROUND OF THE INVENTION Disposable paper dust collectors for vacuum cleaners are known from US. Patents 2,483,169, 2,547,805 and 2,596,808. These collectors consist of a filter bag having a relatively stiff closure plate to which an open end of the bag is attached. The closure plate is usually composed of a pair of cardboard discs which are ultimately adhered together. One of these discs has an opening therein which is in register with a plurality of flaps formed in the other disc by die cutting. Sandwiched between the disc is an elastic member sandwiched between the discs and having a band portion overlying the flaps adjacent the part line thereof. When the suction tube of a vacuum cleaner is inserted through the cover plate and into the bag, the flaps are pushed against the elastic member as they pivot relative to the associated cover plate. When the suction tube is removed from the dust collector, the flaps are closed by the elastic member thereby sealing dirt and dust within the bag.
Methods and apparatus are known for manufacturing dust bag end closures having flaps and elastic bands or strips for closing the flaps, however the prior art is not known to contemplate pretensioning the bands or strips for optimum flap closure.
SUMMARY OF THE INVENTION The invention relates to the method of manufacturing a dust bag end plate having flaps for closing an opening in the end plate to prevent the escape of. dirt from the associated bag when it is removed from the vacuum cleaner for disposal. In particular the method according to the invention comprises bending at least the disc having the flaps which make up the end plate to form an arc and securing an elastic strip or band to the bent disc in overlying relation with the flaps as a chord of the arc. When the discs are folded and united in juxtaposition the band or strip is stretched thereby pretensioning the elastic member which imparts a more positive closing force to the flaps than an elastic strip or band which is in a relaxed condition when the flaps are closed.
A primary object of the invention therefore is to provide a method of attaching an elastic band to the end closure for a vacuum cleaner dust bag so that it is under tension at all times.
Another object of the invention is to provide an improved method of manufacturing end closure plates for vacuum cleaner dust bags in which an elastic flap closing member is in tension when the flaps are closed.
The foregoing objects and other objects and advan- 3,503,308 Patented Mar. 31, 1970 'ice tages will become apparent from the following description of the method in connection with the attached drawing.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is an exploded, schematic perspective view of an end cover plate consisting of a pair of discs bent in accordance with the invention.
FIG. 2 is an end view of the cover plate of FIG. 1 showing the elastic strip in place as a chord of the arc of the bent cover plate.
FIG. 3 is a perspective view showing the disc seen in FIG. 1 as they are being folded into juxtaposition.
FIG. 4 is an exploded perspective view similar to FIG. 1 of a modification of the invention.
FIG. 5 is an end view of FIG. 4 showing the elastic strip in position as a chord of the arc of the bent cover plate.
FIG. 6 is a somewhat enlarged view showing the plate discs of FIG. 5 after having been folded and just prior to forming the end cover plate by securing the disc in juxtaposition.
FIG. 7 is a schematic sectional view of a method of attaching a rubber band or strip to a cardboard disc.
In the drawing reference numeral 10 generally identifies a dust bag closure plate consisting of a pair of cardboard discs 11 and 12 joined together by a fold line 13. The disc 11 is provided with an opening 14 which is large enough to receive a suction tube of a vacuum cleaner (not shown) as illustrated in the above cited prior art. The disc 12 is die cut to form a pair of flaps 15 integral therewith and hinged to the associated disc by a score line 16. The flaps may be dimensioned to pivot into the opening 14 or they may pivot away from the opening 14 depending on which way the discs 11 and 12 are folded and to which disc the filter bag is attached. In FIG. 1 the elastic strip 20 is attached to the lower surface of the disc 12 with the opening or slit 21 of the strip 20 coextending with the part line 18 of the flaps. Thus when the flaps are opened along the cut parting line 18 in a downwardly direction (as viewed in FIG. 1) the flaps project into the slit 21 as they pivot into opening 14 and into a filter bag (not shown) which is attached to the underside of disc 11 when it is folded under disc 12 as seen in FIG. 3 in which case the disc 11 would be juxtaposed below the disc 12 and the strip 20 would be sandwiched between the juxtaposed disc.
As shown in FIG. 2 the elastic strip 20 forms a chord of the are defined by the bent disc 12 and as noted above the bands of strip 20 on each side of slit 21 overlie the flaps. When the discs are juxtaposed and united by adhesive to form an end closure plate the disc 12 is unbent or straightened out thereby stretching the strip 20.
In FIGS. 4, 5 and 6 the disc 11' and 12 are bent into an are along an axis normal to the bend axis of the plate 10 as shown in FIG. 1 since with the part line 18' extends in a plane normal to the fold line 13 in FIGS. 4-6 whereas in FIG. l3 the parting line 18 is parallel to the fold line 13.
When the elastic strip 20 is attached to disc 12' as shown in FIG. 5 the discs 11" and 12' are folded along the line 13 as seen in FIG. 6. The discs are then flattened as indicated by the arrows and adhered together with the strip 20 sandwiched in between. As the discs 11' and 12' are flattened the strip 20 is stretched since the disc 12 is straightened before the discs are juxtapositioned and adhered together.
In the above description the strip 20 has been shown attached to the associated disc by a suitable glue or cement. In FIG. 7 the strip 20 is shown being attached to a disc 30 by means of stakes 31 which wedge the strip 3 20' into suitably dimensioned recessed 32 when the stakes are forced into the recesses. This method of attaching the strip 20 to a disc has the advantage that no curing or setting time is required as in the use of glue or adhesive and by making the stakes 31 of cardboard material the strip 20' is not pierced or torn as is the case if staples are used to secure the strip on a disc. It is noted that the elastic strip can tear when highly stressed by the flaps if a staple is driven through it in which event one or both of the flaps may not be closed.
The foregoing description of the drawing is given by way of example only and it is not intended that the appended claims be limited to all the details recited above.
What is claimed is:
1. The method of attaching an elastic strip having an elongated opening therein to an end closure for a vacuum cleaner dust bag in which said end closure includes at least one disc having a pair of pivotal flaps integral therewith, said flaps defining a cut parting line therebetween; comprising the steps of bending said disc in the longitudinal plane of said parting line, attaching said elastic strip on said bent disc as a chord of said bent disc in a relaxed state so that said elongated opening in said elastic strip overlies said parting line in said bent disc, and straightening said disc for elastically stretching said elastic strip.
2. The method according to claim 1 wherein said end closure comprises a pair of discs; the steps of bending References Cited UNITED STATES PATENTS 470,906 3/ 1892 Whitelaw.
990,154 4/ 1911 Mitchell. 2,070,674 2/1937 Muentener '55-367 X 2,382,356 8/ 1945 Walter 29-449 2,895,551 7/1959 Anderson et al. 931.3 3,052,588 9/ 1962 Anderson et al 93-1.3 3,307,873 3/1967 Blaszkowski 156160 X 3,383,030 5/1968 Downey 55-367 CHARLIE T. MOON, Primary Examiner US. Cl. X.R.
US3503308D 1967-02-15 1967-03-28 Method of manufacturing end closures for a vacuum cleaner dust bag Expired - Lifetime US3503308A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US61638867A 1967-02-15 1967-02-15
US62092967A 1967-03-06 1967-03-06
US62093067A 1967-03-06 1967-03-06
US62661767A 1967-03-28 1967-03-28
US63868467A 1967-04-21 1967-04-21

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US3503308A true US3503308A (en) 1970-03-31

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US3533868D Expired - Lifetime US3533868A (en) 1967-02-15 1967-02-15 Method of manufacturing end closures for a vacuum cleaner dust bag
US3432998D Expired - Lifetime US3432998A (en) 1967-02-15 1967-03-06 End closure for disposable vacuum cleaner dust bag
US3432997D Expired - Lifetime US3432997A (en) 1967-02-15 1967-03-06 End closure for a disposable vacuum cleaner dust bag
US3503308D Expired - Lifetime US3503308A (en) 1967-02-15 1967-03-28 Method of manufacturing end closures for a vacuum cleaner dust bag
US3495386D Expired - Lifetime US3495386A (en) 1967-02-15 1967-04-21 Self-closing dust bag for a vacuum cleaner

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US3533868D Expired - Lifetime US3533868A (en) 1967-02-15 1967-02-15 Method of manufacturing end closures for a vacuum cleaner dust bag
US3432998D Expired - Lifetime US3432998A (en) 1967-02-15 1967-03-06 End closure for disposable vacuum cleaner dust bag
US3432997D Expired - Lifetime US3432997A (en) 1967-02-15 1967-03-06 End closure for a disposable vacuum cleaner dust bag

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US3495386D Expired - Lifetime US3495386A (en) 1967-02-15 1967-04-21 Self-closing dust bag for a vacuum cleaner

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CH (2) CH483247A (en)
DE (1) DE1628582A1 (en)
FR (1) FR1554220A (en)
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NL (1) NL6801894A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707761A (en) * 1969-04-15 1973-01-02 Mattel Inc Method of constructing a toy vehicle
US3751881A (en) * 1970-06-18 1973-08-14 Electrolux Ab Dust receptacle for a vacuum cleaner
US4569113A (en) * 1983-08-24 1986-02-11 Game Time, Inc. Method of making seat for recreational swing set
US4903810A (en) * 1983-09-22 1990-02-27 Dyneer Corporation Clutch shoe construction and method of making same
US5408711A (en) * 1994-05-17 1995-04-25 Mcclelland; Marion Air mattress assembly
US6716262B2 (en) 2002-04-02 2004-04-06 The Scott Fetzer Company Mounting collar for a filter bag

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724179A (en) * 1966-12-26 1973-04-03 Electrolux Ab Self-sealing end closure for disposable dust bag
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Also Published As

Publication number Publication date
CH477199A (en) 1969-08-31
US3432997A (en) 1969-03-18
DE1628582A1 (en) 1971-11-11
US3533868A (en) 1970-10-13
CH483247A (en) 1969-12-31
NL6801894A (en) 1968-08-16
FR1554220A (en) 1969-01-17
US3495386A (en) 1970-02-17
GB1221322A (en) 1971-02-03
US3432998A (en) 1969-03-18

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