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Publication numberUSRE33173 E
Publication typeGrant
Application numberUS 07/200,530
Publication dateFeb 27, 1990
Filing dateMay 31, 1988
Priority dateFeb 23, 1984
Fee statusLapsed
Also published asCA1220063A, CA1220063A1, US4648860
Publication number07200530, 200530, US RE33173 E, US RE33173E, US-E-RE33173, USRE33173 E, USRE33173E
InventorsRussel A. Cassey
Original AssigneeTrigon Packaging Systems (Nz) Ltd.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Envelope with pouch and method of manufacture thereof
US RE33173 E
Abstract
A method of producing an envelope having an integrally formed external pouch on one side for accommodating a despatch note, waybill or the like, comprises the steps of longitudinally folding a sheet of plastics material from a first reel and transporting the folded plastics sheet to a downstream sealing station while simultaneously feeding a strip of sheet plastics to overlie the folded plastics of the first reel to be transported therewith, and sealing folded plastics to form the envelope while simultaneously applying the same process to the strip plastics, to form the pouch on one wall of the envelope.
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Claims(3)
We claim:
1. A method of producing a courier pack envelope incorporating an external pouch, characterized by the steps of:
progressively folding a continuous sheet of plastics material to provide juxtaposed sheet portions interconnected at one of their longitudinal edges by the bight of said fold;
transporting said folded sheet in a longitudinal direction;
progressively feeding a continuous strip of plastics material of a determined width-longitudinally into face engagement with an outwardly presented face of one of said sheet portions;
.Iadd.providing a supply of a continuous peelable adhesive-carrying tape having a peel strip, and applying said tape to said strip of plastics material adjacent one edge of said strip of plastics material with the peel strip facing said plastics material;
progressively attaching one edge of said strip .Iadd.of plastics material .Iaddend.continuously to said face during the feeding of said strip .Iadd.of plastics material.Iaddend.; and,
sealing each of said folded sheet portions and said attached strip .Iadd.of plastics material .Iaddend.to each other at positions spaced longitudinally of said folded sheet, and along lines extending transversely of said folded sheet and said strip .Iadd.of plastics material.Iaddend.;
whereby said strip .Iadd.of plastics material .Iaddend.is attached to said outwardly presented face of one of said sheet portions along three of its edges and defines an open-sided pouch in conjunction with said outwardly presented face of said one sheet portion;
.Iadd.said tape being applied to the edge of said strip of plastics material adjacent the open end of said open-sided pouch whereby the open side of said pouch is sealable by peeling said peel strip away securing the upper edge of said strip of plastics material to said one sheet portion.
2. A method of producing an envelope as claimed in claim 1, including the step of forming individual envelopes by making sequential cross-wise cuts through the sequential transverse lines of securement of said folded sheet and said strip.
3. The method of producing a courrier pack envelope according to claim 1, wherein said step of progressively feeding includes:
aligning said one edge of said strip with said fold of said folded sheet.
Description

This invention relates to methods of manufacturing envelopes.

The present invention is particularly relevant to envelopes such as those used by internal and international courier services where a courier pack is despatched with a despatch note. In the case of the international courier mail it is a requirement of the pack that it be able to be opened by local customs and then resealed, and further the courier pack is invariably accompanied by a despatch slip used by the courier as a customs, despatch and receipt form. At present the courier packs which are used by the international couriers are plain envelopes and the despatch forms are generally clipped or stapled to the pack. Often by the time the process of collection and delivery has been achieved the despatch form is damaged, misplaced or mislaid.

It is an object of the present invention to provide a method of producing an envelope which will provide a separate pouch for despatch notes or the like.

Further objects and advantages of the present invention will become apparent from the ensuing description which is given by way of example.

According to the present invention there is provided a method of producing an envelope comprising the steps of longitudinally folding a sheet of plastics material from a first reel and transporting the folded plastics sheet to a downstream sealing, stitching or seaming station whilst simultaneously feeding a strip of sheet plastics to overlie the folded plastics of the first reel to be transported therewith, and sealing, stitching or seaming the folded plastics to form an envelope or a series of same whilst simultaneously applying the same process to the strip plastics, to form a pouch on at least one wall of the envelope.

Aspects of the present invention will now be described by way of example only with reference to the accompanying drawings in which:

FIG. 1: is a diagrammatic perspective view of an envelope with pouch in accordance with one possible embodiment of the present invention, and

FIG. 2: is a diagrammatic plan view of an apparatus/process for producing an envelope and pouch in accordance with the present invention.

With respect to FIG. 1 of the drawings, an envelope in accordance with the present invention generally indicated by arrow 1 comprises a body 2 having closed sides 3, one closed end 4 and one open end 5 where there is situated a flap 6. The flap 6 is provided with a sealing strip 7 which can be in the form of a peelable adhesive tape, VELCRO or a re-usable adhesive strip. Domes or clips (not shown) may be used to hold the flap in a closed position relative to the envelope body 2.

In accordance with the present invention the envelope 1 is provided with a pouch generally indicated by arrow 8 which can be used to accommodate a despatch slip 9 or other articles such as a letter. The pouch is formed by laying a strip of plastics material 11 over the base of one side of the envelope 1 and sealing, adhering or seaming the edges 11 so that there is provided an opening 12 which is sealable against the adjacent body part 2 of the envelope 1 using a sealing tape, VELCRO or other means as described in relation to the envelope flap 6.

The envelope 1 is by preference manufactured from a laminate or co-extrusion having inner layers of plastics and an outer layer of mica-filled or impregnated high density polyethlene. Such film provides an appropriate degree of toughness and on the outer surface where there is often a requirement to print or write on the surface, the surface is such that inks, labels or the like can be easily applied. The strip plastics 10 used for forming the pouch is preferably a transparent plastics so that the contents of the pouch can be readily viewed, although this is not essential to the present invention.

With respect to FIG. 2 of the drawings, an envelope in accordance with the present invention can be manufactured by a process comprising forming an envelope having at least one open end while simultaneously forming an openable pouch on at least one side of the envelope.

The process illustrated by FIG. 2 by way of example, involves longitudinally folding a sheet 13 of plastics material from a first supply reel 14 using conventional film folding means 15 and transporting folded film 16 to a downstream sealing or sticking area generally indicated by arrow 17 whilst simultaneously feeding a strip of plastics material 18 from an overhead reel supply source (not shown) to overlie folded plastics 16 so that the strip material 18 is transported with the folded film 16 to the sealing or sticking position.

Where the process of the present invention is used to produce an envelope with pouch such as is described and shown in relation to FIG. 1 of the drawings, a peelable tape 7 from a supply source (not shown) is added to the underlying extensible portion illustrated in FIG. 2, which in the finished product is the envelope flap 6. Similarly a peelable tape 19 is applied to the edge 20 of the strip plastics material 18, and optionally may be applied to the lower edge 21 of said strip plastics material 18 although it is preferred that, all edges of the strip plastics except at the opening of the pouch, be permanently closed and sealed perhaps using hot-melted adhesive. The peelable tape 7 is applied with the peel strip facing up whilst the peelable tape applied to edges 20 (and optionally edges 21) is applied with the peel strip facing down.

At the sealing station 17 the plastics 16 and the strip plastics material 18 is sealed or adhered at S, and downstream of the sealing and sticking position a cross-wise cut between the pre-formed envelopes is made severing the envelopes. Where the pouch 8 is to be opened from both ends the strip plastics material 18 can be positioned centrally of the folded plastics material 16, however when the bottom of the pouch 8 is to be permanently sealed this operation can be carried out at the sealing station 17.

Aspects of the present invention have been described by way of example only and it is to be appreciated that modifications and additions thereto may be made without departing from the scope of the present invention as defined in the appended claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2819010 *May 24, 1954Jan 7, 1958Jose AmiguetSealing envelopes
US3147674 *Jun 22, 1959Sep 8, 1964Bemis Bro Bag CoMethods of making bags
US3424636 *Dec 18, 1967Jan 28, 1969Brody ArthurMethod of making pocket-forming device for library cards
US3456867 *Nov 3, 1967Jul 22, 1969Dow Chemical CoBag assemblage
US3472129 *Oct 11, 1965Oct 14, 1969George A AlexandrouMachine for applying ribbon
US3512457 *Mar 1, 1968May 19, 1970Tohcello Shoji Kaisha Co LtdMethod and apparatus of making bags of thermoplastic film having integral sealable flaps
US3595468 *Jun 6, 1969Jul 27, 1971Dow Chemical CoOpening device
US3680768 *Aug 12, 1970Aug 1, 1972Cellu Craft IncPlastic bag with integral pouch and method for making same
US3906844 *May 28, 1974Sep 23, 1975Int Envelope LimitedMethod and apparatus for producing envelopes having a closure flap
US3998135 *Apr 10, 1975Dec 21, 1976Ppc Industries, Inc.Bag structure and method of producing
US4192447 *May 1, 1978Mar 11, 1980Victor Envelope CompanyMulti-compartment envelope
US4256256 *Apr 30, 1979Mar 17, 1981American Can CompanyMultiple compartment pouch and method of making same
US4273549 *Jun 26, 1979Jun 16, 1981W. R. Grace & Co.Process for making multi-walled plastic bag
US4393989 *Jul 30, 1981Jul 19, 1983Container Corporation Of AmericaEnvelope-type mailing folder
US4638940 *Feb 23, 1983Jan 27, 1987Skokos Peter GCombined form for visual matter, written descriptions and mailing envelopes
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5221567 *Jul 11, 1990Jun 22, 1993Baker Tony DPackaging system
US5429576 *Jul 20, 1994Jul 4, 1995Winkler & DunnebierApparatus for making reusable adhesive envelopes
US5620256 *Aug 22, 1995Apr 15, 1997Makrauer; George A.Tamper evident security bag
US7101331 *Mar 30, 2004Sep 5, 2006Data Visible CorporationFile folders
US20040250957 *Mar 30, 2004Dec 16, 2004Janssen Alexander PattonFile folders
US20110204132 *Feb 19, 2010Aug 25, 2011Vera Jude CTamper-Evident Reusable Mailing Envelope
Classifications
U.S. Classification493/195, 493/920, 383/40, 229/72, 493/216, 493/347
International ClassificationB31B23/00, B65D27/00
Cooperative ClassificationB31B19/00, Y10S493/92, B31B2237/406, B31B2237/10, B31B2237/40, B65D27/00
European ClassificationB31B23/00, B65D27/00
Legal Events
DateCodeEventDescription
Aug 7, 1990FPAYFee payment
Year of fee payment: 4
Oct 18, 1994REMIMaintenance fee reminder mailed
Mar 12, 1995LAPSLapse for failure to pay maintenance fees