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Publication numberUS3648923 A
Publication typeGrant
Publication dateMar 14, 1972
Filing dateJun 30, 1970
Priority dateJun 30, 1970
Publication numberUS 3648923 A, US 3648923A, US-A-3648923, US3648923 A, US3648923A
InventorsFrank L Young
Original AssigneeFrank L Young
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Light weight expansible mailing envelope
US 3648923 A
Abstract
A light weight expansible mailing envelope which is fabricated from a single blank of spunbonded olefin sheet stock. All 90 DEG inside corners at the open mouth of the envelope include radiused filets at the intersection of non-coextensive planes which the side gusset sections form with the front and back panels. Corner closure flap extensions are incorporated to increase the number of non-coextensive planes at the open end of the envelope.
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Description  (OCR text may contain errors)

United States Patent Young 5] Mar. 14, 1972 [54] LIGHT WEIGHT EXPANSIBLE 2,945,616 7/1960 Normandin ..229/68 MAILING ENVELOPE 3,063,618 11/1962 Berkowitz ..229l68 3,144,979 8 1964 Y ..229 41 B [721 Invent Frank 401 Came Cilcle, 3 531 046 9/1970 C i r i g an 2249/72 Valley, Pa. 15675 l [22] Filed: June 30, 1970 Primary Examiner-M. Henson Wood, Jr.

Assistant Examiner-Michael Y. Mar [21] App1.No.: 51,269 AttorneyStanley Bilker [52] US. Cl. ..229/75, 229/41 B, 229/68 R, ABSTRACT I 51] l t Cl A light weight expansible mailing envelope which is fabricated 58] d 68 72 75 from a single blank of spunbonded olefin sheet stock. All 90' d i inside comers at the open mouth of the envelope include radiused filets at the intersection of non-coextensive planes [56] Reierences Cited which the side gusset sections form with the front and back panels. Corner closure flap extensions are incorporated to In- UNITED STATES PATENTS crease the number of non-coextensive planes at the open end Young ..229/75 ..229/68 of the envelope.

2 Claims, 4 Drawing Figures PATENTEUMAR I4 I972 INVENTOR FRANK L. YOU/V6 ATTORNEY LIGHT WEIGHT EXPANSIBLE MAILING ENVELOPE This invention relates to an expansible mailing envelope which can be fabricated from a single blank of sheet stock on continuous folding and glueing machines. More particularly, this invention relates to a very light weight of packet size which is adapted for overseas mailing to foreign countries, especially via airmail, wherein postage costs are quite high.

The primary considerations for an overseas mailing expansible envelope are concerned with its strength so that the envelope does not tear and lose its contents in transit. Up to the present time, paper and manilla envelopes have been used exclusively. However, in order to provide the required strength and durability for handling bulky mailings, heavier paper must be utilized with consequent addition to postage costs.

It is therefore an object of this invention to provide a lightweight expansible mailing envelope whose durability and resistance to tear, puncture and abrasion is at least as great as hitherto used paper envelopes.

Another object of this invention is to provide an expansible mailing envelope which is made of spunbonded olefin sheet, and which has a constructional configuration which is resistant to tearing.

Another object of this invention is to fabricate an expansible mailing envelope from a single blank of spunbonded olefin sheet stock in order to provide a construction which is stronger than its equivalent weight in paper and weighs less than half the weight of a comparable volume of the usual paper stock.

Other objects of this invention are to provide an improved device of the character described which is easily and economically produced, which is sturdy in construction, and both highly efficient and effective in operation.

With the above and related objects in view, this invention consists of the details of construction and combination of parts as will be more fully understood from the following detailed description when read in conjunction with the accompanying drawing in which:

FIG. I is a plan view of a spunbonded olefin sheet blank embodying this invention.

FIG. 2 is a perspective view showing the blank in partly folded and adhesively assembled disposition.

FIG. 3 is a perspective view of the envelope in fully folded and sealed flat disposition.

FIG. 4 is an enlarged fragmentary view of the encircled portion identified by the numeral 4 in FIG. 2.

Referring now in greater detail to the drawing in which similar reference characters refer to similar parts, I show a single sheet blank which is so shaped and scored as to provide when folded and adhesively secured an expansible envelope resembling an envelope in flat condition but being adapted to be expanded into boxlike disposition.

The basic advance of the instant invention resides in the use of a blank comprising a spunbonded olefin sheet in which ran domly arranged continuous filament fibers, such as polyethylene, are bonded at the crossover points. The sheet produced is sold under the name Tyvek, a trademark of E. I. duPont de Nemours & Co., of Wilmington, Del., and has a relatively smooth surface which is paperlike in texture and feel. The weight of the type gauge Tyvek" used herein is approximately 1.3 ounces per square yard for example, as compared to 2.8 to 3.5 ounces per square yard for a comparable strength paper. The dense fiber network yields extremely high resistance to tear, puncture and abrasion.

The spunbonded olefin sheet blank itself comprises a sub stantially rectangular front panel 10 and a back panel defined by a pair of sections 12 and 14 which are hingedly connected to the front panel by interior and exterior gusset sections 16 and 18 defined by longitudinally extending triple score lines 15, 17 and 19. A bottom flap 20 is hingedly secured to the lower edge of the front panel by interior and exterior gusset panels 22 and 24 defined by triple score lines 21, 23 and 25. Corner gusset portions 26 and 28 are hinged from the lower edge of the inboard and outboard gusset sections 16 and 18 in longitudinally aligned arrangement with interior bottom gusset panel 22. A tab 30 'is hinged to the interior corner gusset portion 26 by way of a continuation of score line 23 and further hinged to the adjacent outboard bottom gusset panel by extension of lateral score line 15. j

A top sealing flap 40 is hingedly secured to the upper edge of the front panel 10 by folding portions 32 and 34 oriented between fold lines 31, 33 and 35. Corner closure flaps 36 and 38 are hinged to opposite lateral edges of the folding sections 32 and 34 coextensive with the side gusset sections 16 and 18. A rounded or radiused filet 50 is formed within the intersection of the lateral edge of the top flap 40 with the upper edge of the corner flaps 36 and 38. Similarly, a radiused filet 60 is incorporated within the inside corner defined by the intersection of the upper edge of the back panel sections 12 and 14 with the respective lateral edges of the closure flaps 36 and 38. These filets 50 and 60 form the second significant portion of this invention and are incorporated at the open mouth of the envelope at the intersection of the adjacent panel planes whose edges themselves cross in quadrature to define an inside corner.

The envelope is assembled by first folding the back panel sections 12 and 14 inwardly, then outwardly, and then inwardly again along the triple score lines l5, l7 and 19 such that the gusset sections 16 and 18 are folded flat between the front and back panels. The overlapping edges of the back panel sections 12 and I4 are glued together. Next, the bottom panel 20 is folded upwardly about score line 23, glue having been applied as indicated to the bottom flap portion 20 and to the tab 30. The closure flaps 37 and 38 are already folded flat as shown in FIG. 2.

The fabrication of the envelope proper is now completed with the bottom panel 20 adhesively sealed to the underlying edge of the back panel defined by the already glued sections 12 and 14. As is apparent from FIGS. 2 and 4, the radiused filets 50 and 60 which are incorporated at the mouth or open end of the envelope at the 90 inside corners formed by the edges of intersecting planes provide resistance to tearing during filling of the envelopes. It is to be observed that a radiused filet is included only at those areas at the open mouth of the envelope where a gusset panel joins a front or back panel which is not coextensive therewith such that an inside 90 inside corner is defined between the edge of the gusset panel and the adjacent edge of the front or back panel attached thereto. Therefore, by utilizing corner closure extensions 36 and 38, the additional radiused filets 60 can be incorporated and thus provide a greater degree of strength and resistance to tearing as would be offered merely by filets 50 included at the junction of the gusset sections 16 with the top sealing flap 40.

Although this invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

What is claimed is:

l. A lightweight expansible envelope for overseas mailing of generally bulky materials and documents especially via airmail comprising: a one-piece blank including generally rectangular front and back panels, sidewalls interconnecting the respective opposite lateral edges of the front and back panels and including inwardly folded gusset sections defined by triple score lines and lying flatly between said front and back panels when the envelope is in flat disposition, a bottom interconnecting the adjacent lower edges of said front and back panels including gusset panels defined by triple score lines and adapted to be opened into boxlike configuration with respect to said front and back panel when the envelope is expanded, a substantially rectangular sealing flap hingedly connected to the upper edge of said front panel and adapted to define a closure for the open end of the envelope, corner closure extensions of generally rectangular configuration hinged to the lateral edges of saidsealing flap andto the upper edge of each of said side gusset sections, said corner closure extensions including free edges respectively intersecting with the lateral edges of said 2. The envelope of claim 1 wherein said blank is formed from spunbonded olefin sheet stock consisting essentially of randomly arranged continuous fibers binded at crossover points.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2945616 *Nov 23, 1956Jul 19, 1960Canada Envelope CompanyGusset type envelopes
US2945617 *Jun 3, 1957Jul 19, 1960Canada Envelope CompanyGusset type envelopes
US3063618 *Jul 17, 1959Nov 13, 1962Tension Envelope CorpExpanding envelope
US3144979 *Aug 5, 1963Aug 18, 1964Frank L YoungExpansible corrugated paperboard carton
US3414185 *Jan 16, 1968Dec 3, 1968Frank L. YoungExpansible center seam envelope
US3531046 *Nov 8, 1968Sep 29, 1970Us Envelope CoDestructible envelope with detachable built-in return envelope
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4274577 *May 16, 1979Jun 23, 1981Walsh Jr Charles BExpansion filing container
US4915288 *Apr 27, 1989Apr 10, 1990Avery International CorporationEnvelope with single peel-off backing sheet to facilitate printing and copying
US4948028 *Feb 3, 1989Aug 14, 1990Avery International CorporationVariable size envelope with single closure flap
US5487826 *Jan 14, 1994Jan 30, 1996International Envelope Company, Inc.Cardboard mailer packages
US5803250 *Jul 16, 1997Sep 8, 1998Mori; TakanoriCase for disk-type recording medium
US5823333 *Sep 29, 1995Oct 20, 1998Mori; TakanoriCase for disk-type recording medium
US6227444 *Feb 17, 2000May 8, 2001Pama Enterprises, Inc.Expandable envelope construction
US6328160Jun 23, 2000Dec 11, 2001Edward CookseyExpandable compact disc shipping container
US6866183 *Dec 20, 2002Mar 15, 2005Meadwestvaco CorporationAdjustable envelope
US7073309Sep 28, 2004Jul 11, 2006Avery Dennison CorporationMethod of using a reusable closure for packages
US7165888 *Jul 25, 2001Jan 23, 2007Avery Dennison CorporationResealable closures for packages and packages containing the same
US7629046Mar 9, 2004Dec 8, 2009Avery Dennison CorporationReusable closures for packages and methods of making and using the same
US9010619 *Jun 28, 2012Apr 21, 2015Conformer Products, Inc.Expandable file holder
US20030173395 *Dec 20, 2002Sep 18, 2003Purcell Douglas K.Adjustable envelope
US20040168305 *Mar 9, 2004Sep 2, 20043M Innovative Properties CompanyApparatus and method for converting a fuel cell membrane web to precisely positioned membrane sheets
US20050042445 *Sep 28, 2004Feb 24, 2005Van Driesten Sjoerd JohannesReusable closures for packages and methods of making and using the same
US20060060642 *Sep 17, 2004Mar 23, 2006Rosier Darryl CGift wrap gift bag
US20070164090 *Jan 17, 2006Jul 19, 2007Solomonson Frances BEnvelope-type container, in particular for small gifts, event favors, candy, gift certificates and the like
US20110056975 *Sep 9, 2010Mar 10, 2011Sharon McgillionCollapsible housing for articles
USD747767Aug 29, 2013Jan 19, 2016Shannon ZapalacEnvelope-card combination
EP0657364A1 *Nov 23, 1994Jun 14, 1995Pussikeskus OyMailing package and packaging method
Classifications
U.S. Classification229/67.3, 229/928, 229/75, 229/117.5
International ClassificationB65D27/00
Cooperative ClassificationB65D27/00, Y10S229/928
European ClassificationB65D27/00
Legal Events
DateCodeEventDescription
Jun 17, 1981AS02Assignment of assignor's interest
Owner name: AMERICAN FIBER-VELOPE MFG. CO., A CORP. OF DE.
Owner name: YOUNG, FRANK L.
Effective date: 19810605
Jun 17, 1981ASAssignment
Owner name: AMERICAN FIBER-VELOPE MFG. CO., A CORP. OF DE.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YOUNG, FRANK L.;REEL/FRAME:003863/0190
Effective date: 19810605
Feb 23, 1981ASAssignment
Owner name: AFV INTERIM, INC., A CORP. OF DE.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN FIBER-VELOPE MFG. CO., A CORP. OF DE.;REEL/FRAME:003950/0335
Effective date: 19811231
Feb 23, 1981AS02Assignment of assignor's interest
Owner name: AFV INTERIM, INC., A CORP. OF DE.
Owner name: AMERICAN FIBER-VELOPE MFG. CO., A CORP. OF DE.
Effective date: 19811231