Multiple web business form stock and mailers

Abstract: The invention relates to a multiple web business form stock comprising a base web formed with sprocket drive holes (23, 24) along one or both longitudinal edges (20, 22) and divided into a plurality of envelope lengths (26)by transverse lines of weakness(28), the base web having a longitudinal central fold line (30) dividing the web into upper outgoing envelope sheets (32) and lower outgoing envelope sheets (34), a longitudinal marginal line of heat sealable adhesive (45) along the marginal edge portion of each said upper envelope sheet inside the sprocket holes, upper and lower marginal lines of heat sealable adhesive (46, 48) adjacent and inside the upper and lower transverse lines of weakness (30) of each upper sheet of each envelope length such that when folded along the fold line (30) and subjected to heat each envelope length will provide a sealed outgoing envelope, marginal lines of perforation extending substantially around each envelope length inside the lines of adhesive so that when the lines of perforation are broken around such a sealed envelope the envelope forming base sheet can be unfolded along the fold line, characterised by a plurality of inner webs each being secured by adhesive along one edge, preferably adjacent the longitunal fold line, to the web beneath it with the lower of the inner webs being secured along one edge to the base web inside the sprocket holes, the inner webs having a transverse dimension less than half the transverse dimension of the base web, the inner webs being formed with transverse lines of weakening and perforation lines which are aligned with the transverse lines of weakening and perforation lines of the base web.

Description: This invention relates to a multiple web business form stock for forming individual mailers, a process for forming such stock and mailers formed therefrom. A business form stock for forming individual mailers has an indeterminate length very much greater than its width and is divided transversely by lines of weakening into envelope lengths so that it can be divided into individual sealed mailers. Such mailers as received by an addressee can be opened, usually by tearing off marginal portions along one or more lines of perforation adjacent their edges and normally contain an open, pre-addressed, return envelope, a record portion giving information and instructions to the addressee, to be kept by the addressee, and a return stub to be included in the return envelope, either with a cheque or marked with the appropriate information by the original addressee or both. Such a business form stock can be formed from a single web folded on itself about a central longitudinal fold line to provide front and backsides of an outgoing envelope and as described in European Patent Specification 0097421 a return envelope and a record card and stub. This invention is concerned with such business form stock in which the outer web is folded upon itself about a central longitudinal fold line. The present invention is particularly concerned with business form stock to be supplied to the customer with all the non personalised and repetitive information pre-printed and all the adhesive and perforations pre-applied to the stock but leaving the customer to print personalised information. The form stock can be supplied to the customers in many physical forms. A popular one, which is perhaps most often requested, is one in which the stock is repeatedly folded back on itself along the horizontal perforation lines which will later be severed to provide separate mailers. Although such a zig zag folding can be accomplished using every such perforation line as a fold line, in practice, the folding is practised only on every second or third or even the fourth such fold line, with the resulting accordian-folded composite being accumulated in a carton. At the customer's facility or at the facility of the service organisation acting on behalf of the customer, the carton is opened and the lead end of the form stock is fed into a machine, such as a computer-driven variable printer, which successively customizes each potential mailer of the composite web, e.g. by applying a customer's name, account number, address, and amount due together with the same information in bar code or other machine readable form if desired. This information is applied to surfaces internally of what will become the outgoing envelopes typically with an impact printer. After printing the customer will pass the stock through a plow fold machine which folds it in two, a trimmer which trims off the sprocket receiving holes, a bursting machine to separate the individual mailers from one another for posting and a heat sealing machine which activates the glue to seal the individual mailers around their edges. With a stock such as disclosed in European Patent A-0097421, the amount of information which can be included is limited and an object of the present invention is to provide a form stock, suitable for personalised printing by an individual customer, but with space to contain a considerable amount of information and normally, but not essentially, a return envelope. The customer will not need the machinery to collate more than two webs but will have the ability to fold, heat seal and burst a single web. While Johnson US-A-3837565 discloses a form stock with several inner webs, these would not conveniently form mailers which could be sealed around the inner webs and allow the mailers to be opened by unfolding along the central fold line. Either the inner webs are torn out before mailing or the inner webs are discontinuous and need to be pattern patched to the base web during manufacture. French Specification A-2284532 discloses a stock with several inner webs including a return envelope forming webs, but mailers formed therefrom cannot be opened and unfolded along the central fold line. The present invention provides a business form stock comprising a base web divided transversely by lines of weakening into envelope lengths so that it can be divided into individual mailers, the base web being designed to be folded along a central longitudinal fold line to provide upper and lower sides of outgoing envelopes, the stock being pre-printed with all the required non-personalised and repetitive information and having applied thereto all the non-active, activatable adhesive and perforation lines necessary for sealing and opening the eventual mailers, the stock having a plurality of inner webs secured to the lower side of the base web and each extending substantially the full effective length of the base web, the upper inner web being free to receive personalised printed information, the inner webs having a transverse dimension less than half the transverse dimension of the base web, the adhesive including upper and lower transverse lines of adhesive adjacent and inside the lines of weakening and a longitudinal marginal line of adhesive adjacent and inside the longitudinal edge of the upper side so that when folded along the fold line each envelope length is arranged to provide a sealed outgoing envelope, characterised in that the perforation lines include marginal lines of perforations extending substantially around three sides of each folded envelope length inside the transverse and longitudinal lines of adhesive, at least the longitudinal edge portion of at least one of the inner webs being continuous adjacent the fold line and the transverse marginal lines of perforation extending through said continuous portion(s) of the at least one of the inner webs, so that when the lines of perforation are broken around such a sealed envelope the envelope forming base sheet can be unfolded along the fold line. With such a business form stock, comprising for example three inner sheets, the whole of the inside surface of the upper envelope forming sheet, apart from the window area, is available for printing information to the addressee. Additionally, the whole of both sides of the upper two of the inner webs (which webs extend substantially the full envelope length), apart from the area containing the address and personalised information, is available for pre-printed information or for insertion of information by the addressee while the lower of the inner webs can form a pre-addressed return envelope with the lower outer envelope sheet. Preferably, the upper inner webs will be adhered to each other (if more than one) and to the base web by longitudinal lines of adhesive preferably extending adjacent the central fold line (with advantage within 1 to 2 mm of that fold line); a line of perforations may allow easy detachment of these sheets after opening the mailer. This helps the folding of the base web and provides that the inner sheets are attached to the lower envelope forming sheet as a booklet after opening of the eventual mailer. The upper of the inner webs of the composite form stock will be available for the customer to print personalised information, particularly the address of the addressee, and the upper envelope sheet of the base web will preferably include a die cut window covered with transparent material located such that the addressee's address can be seen through this window when the base sheet is folded on itself along the central fold line. Preferably each of the inner webs is formed with die cut slots between each envelope length above and below each transverse line of weakening, which slots expose adhesive also applied to each lower envelope sheet adjacent such transverse lines. The lines of adhesive on both upper and lower envelope sheets then contact each other to form a good seal despite the thickness of the inner webs. The invention extends to a method of making such business form stock, and to individual mailers formed therefrom. One embodiment of business form stock and method and parts for forming such stock and forming mailers therefrom, will now be described, by way of example only, with reference to the accompanying diagramatic drawings of which: Figure 1 shows the inner surface of part of a continuous length of business form stock, Figure 1a is a diagrammatic section on the line I-I of Fig. 1, Figure 1b shows diagramatically a finished mailer formed from the stock of Figure 1. Figure 2 shows the inner surface of the base web forming part of the stock of Figure 1, Figure 3 shows the outer surface of the base web of Figure 2, Figure 4 shows the upper surface of the lower inner web part of the stock of Figure 1, Figure 5 shows the upper surface of the middle inner web part of the stock of Figure 1, Figure 6 shows the upper inner web part of the stock of Figure 1, Figure 7 shows diagramatically a process line for corrolating the webs shown in Figures 2 to 6 into the composite business form stock of Figure 1, Figure 8 shows diagramatically a process line for turning the stock of Figure 1 into finished mailers and The multiple web business form stock 10 is made up from a longitudinally continuous (indeterminate length) full width base web 12 and a plurality of just under half width inner webs 14, 16, 18. A full width web in this example is 39.6 centimetres wide and is provided along its opposite longitudinal edges 20, 22 with respective longitudinal rows of sprocket pin-receiving holes 23, 24 for driving the stock. The stock is divided into individual envelope lengths indicated by the bracket 26 by transverse lines of weakness 28 extending across the width of the stock. For example envelope length (depth) equals 20.3 cms. In this specification the term "perforation line" is used as a synonym for "line of weakness". The perforation lines 28 are intended for dividing the finished stock into individual mailers. Referring now to Figures 2 and 3, the base web 12 is formed with a longitudinal, central fold line 30 such that when the base web is folded on itself about this line, the edges 20, 22 will coincide with the left hand half 32 (as seen in Figure 2) forming an upper outgoing envelope sheet and the right hand half 34 (as seen in Figure 2) forming a lower outgoing envelope sheet and a lower return envelope sheet. The upper envelope sheet 32 has die cut therein a window 36 covered in conventional manner with a transparent window patch 38. A strip of adhesive covered by barrier tape and sometimes referred to as Kleen stick tape 40 (or a rewettable glue line) is secured in a longitudinal line spaced to the right of the fold line 30, this strip being secured to the lower outgoing envelope sheet of the base web and forming part of the flap of a return envelope as will be described hereafter. A fold line 42 to assist folding down this flap is formed longitudinally adjacent the strip 40. The further longitudinal perforation line 44 is formed between lines 30 and 42 for detaching the parts 32 and 34 from one another after opening the finished mailer. A line of heat sealable adhesive 45 is applied in a pattern adjacent the left hand edge of the inner surface of the upper outer envelope forming part 32 adjacent but inside the sprocket holes 23. Similar patterned lines 46, 48 of heat sealable adhesive are applied along the transverse edges of both the upper and lower outer envelope forming parts 32, 34 adjacent the lines of weakness 28. Gaps may be formed in these lines of adhesive to avoid trapping air within the sealed mailer. A gap may be left in the lines 46 and 48 immediately to the right of the longitudinal fold line 30 to avoid tenting of the form stock. Referring next to Figure 4 which shows the lower 14 of three inner webs, this web having a right hand edge 50 coinciding with the edge 22 of the base web 12 and formed with sprocket holes 52 coinciding with the sprocket holes 24. The left hand edge 54 of this sheet extends to within about 4 centimetres of the central fold line 30 of the base sheet. The upper surface of this sheet is printed with a return address indicated at 56 and either a business reply service licence indication 58 or instructions for sticking a stamp. This web is formed with patterned lines of wet adhesive, on its underside in a C shaped pattern as indicated at 60 extending adjacent but spaced from the upper, lower and right hand edges of each envelope length as will be described later. This web will act as part of the return envelope. The web is also provided, as part of the collation process to be described later, with a line of adhesive 64 applied to its upper surface between the upright of the C shaped pattern 60 and the sprocket holes. Referring next to Figures 5 and 6 which show respectively an intermediate inner web and an upper inner web, each of these sheets has a right hand edge 65 coinciding with the edge 22 of the base web and provided with sprocket drive holes 66 coinciding with the sprocket holes 24. The left hand edge 68 of each of these inner webs extends to within one or two millimetres of the central fold line 30. The upper sheet 18 is intended to receive personalised information applied by the customer of the business form stock and for this purpose has an area indicated at 70 for receiving the name and address of the addressee and a further area 72 for receiving bar code information. Other areas may be provided for receiving details of an account number or amount required from the addressee. Apart from the marginal strip portions, the remaining area of both sides of both webs 16 and 18 can be pre-printed with the information to the addressee or spaces and instruction indicating how the addressee should fill in information required to be sent back to the original sender. As shown in Figure 5, web 16 has applied, at a later stage to be described, longitudinal lines of adhesive 74, 76 adjacent its edges but with line 76 inside the sprocket holes. Both webs 16 and 18 have a line of perforations 78 formed longitudinally to the right of the edges 68 and coinciding with one another in the assembled form stock, but preferably the line of adhesive 74 extends to the right just past the perforation line 78. Longitudinal and transverse perforation lines 113, 115 extend through all layers around the edge of each mailer. Longitudinal lines 113 extend along opposite edges inside the lines of adhesive 45, 105, 76 and 64. Transverse lines 115 extend between lines 113 below and above the adhesive lines 46 and 48. Referring back to Figure 1 it will be seen that when the left hand side of the stock is folded about the longitudinal fold line 30 the window 36 will be above the address receiving area 70 of the web 18 so that the address can be read through the window. Referring now to Figure 7, this shows a collating and assembly plant for the stock as indicated at 90, in which separate continuous supplies 92 of base web 12, 94 of lower inner web 14, 96 of middle inner web 16, and 98 of upper inner web 18 are assembled into the composite multiple web stock 10. The web 12 in the supply 92 is of the form shown in Figures 2 and 3 with all non-personalised printing thereon and the window formed therein and patched and includes the perforation lines 30, 42 and 44, 113, 115 and the adhesive 45, 46, 48 but not the perforation lines 28 nor the Kleen stick strip. The web 12 from the supply 92 is first collated with the Kleen stick strip 40 from a supply 100 thereof and then passes to a paste unit 102 which supplies longitudinal paste lines 104, 105, respectively adjacent but inside the fold line 30 and the sprocket holes 24. The web 14 in stack 94 is of the form seen in Figure 4 except that it does not include any adhesive or perforation lines 28. This web 14 is passed through a paste unit 106 which applies the line of adhesive 64. The web 16 in stack 96 is of the form shown in Figure 5 except that it does not include any adhesive or perforation lines 28. The web 16 from stack 96 is passed through paste unit 108 where the longitudinal paste lines 74 and 76 are applied. The web 18 in the stack 98 is in the form shown in Figure 6 including all perforation lines except perforation line 28. The webs leaving paste units 106, 108 and stack 98 are fed through a collator 110 which assembles them together so that web 18 is stuck to web 16 along the lines 74 and 76, web 16 is stuck to web 14 along the line 64 and all the webs are aligned. This composite inner web assembly is then fed through a die cut machine which cuts slots 114 (Figure 1) through the composite inner web above and below the position of each transverse line of weakness 28 and substantially coinciding with lines 115 extending between peforation lines 78 and 113. The composite web is then fed through a further paste unit 116 which applies the C-shaped pattern 60 of adhesive to the under side of the web 14. The composite inner web is then joined with the base web 12 so that the C-shaped pattern of adhesive 60 adheres the web 14 to the base web to form the three glued sides of the return envelope and the lines of gluing 104, 105 secure the outer edge of the web 14 and the left hand edge of the intermediate web 16 to the base web. The composite stock 10 so formed is now fed through a perforator 112 which produces the transverse perforation lines 28 through all layers. The stock is now folded into a carton 103 for transmission to a customer. As seen in Figure 8, the customer feeds stock 10 through a printer 117 under control of a computer 118 to provide the personalised printing. The stock is then passed through plow folder 120 where it is folded in half along line 30, a trimmer 122 where the edge is trimmed off, a burster 123 where it is separated into individual mailers 126, and a heat sealing unit 124 where each mailer is sealed around its edge. Each mailer will then be as seen in Figure 1b. The trimmer acts to cut off the sprocket holes along a line inside the sprocket holes but outside the perforation line 113 in order the leave that edge of the mailer sealed. As seen in Figure 1b, the mailer is completely sealed by the hot melt adhesive 45, 46, 48 along three edges and the fold line 30 along the fourth edge. To open the mailer, the addressee first tears along the perforation line 113 opposite the fold line, then tears along the perforation lines 115 along the other two edges and finally opens the mailer by unfolding along the fold line 30. The upper and intermediate information bearing sheets 18 and 16 remain attached to the base web 12 by adhesive 64, 74 and so does the return envelope until the addressee is ready to deal with the information and send a reply. The addressee can then tear out the upper and intermediate sheets 18 and 16 along the perforation lines 78. As shown, the glue line 74 between the sheets extends beyond the perforation line 78 so that the sheets remain fastened together as a booklet but can be easily torn apart. This is not essential. The glue lines 46 on the part 34 in combination with those on part 32 ensure a good seal despite several layers, while the die cuts still reduce tenting and reduce the number of layers which must be torn through along perforations 115. These sheets are then completed by the addressee as required, the return envelope is detached by tearing along the perforation line 44, the sheets placed in the return envelope with a cheque if required, the release strip of the gummed Kleen strip 40 is removed, the sealing flap folded down about the fold line 42 and sealed and the return envelope posted to the pre-addressed sender. The upper outer envelope forming sheet 32, with the information printed on its inner surface, can be retained by the addressee. Although the mailer is described with three inner webs, it may have more or less and the upper ones may have a chemical carbonless coating which will provide printing on lower layers when an impact printer is applied to the upper web. In known manner the strength of the lines of weakness may be chosen as required for different purposes. The non variable printing can clearly take any form as can the form of adhesive except that the adhesive 45, 46, 48 must be capable of later activation at the customer's plant after the personalised printing has been applied. As described, a hot melt glue is preferred. As is conventional, any time a glue line is to be provided, it may be provided on either or both of the two surfaces it is intended to adhere together, and that line may be constituted by one or more continuous lines, narrow or broad, continuous or discontinuous (e.g. by a pattern of glued dots). Preferably, but not essentially, the glue applied in units 102, 106, 108 and 116 is a cold glue which is simply applied wet and the two surfaces which are to be stuck together are pressed together while the cold glue is in a sufficiently tacky state. However, other forms of glue which could be pre-applied to the webs and activated at the time of collation could be used. Although both longitudinal edges of the composite inner webs are preferably secured to the base web, this is not essential and only one edge is essentially secured. However, it is an advantage with the present arrangement that when the perforation line 113 has been broken opening the mailer, the information bearing sheets 16 and 18 are secured in the opened mailer in booklet form along their left (or alternatively their top) edges.

Claims: A business form stock comprising a base web (12) divided transversely by lines of weakening (28) into envelope lengths (26) so that it can be divided into individual mailers, the base web being designed to be folded along a central longitudinal fold line (30) to provide upper and lower sides (32, 34) of outgoing envelopes (126), the stock being pre-printed with all the required non-personalised and repetitive information and having applied thereto all the non-active, activatable adhesive and perforation lines necessary for sealing and opening the eventual mailers, the stock having a plurality of inner webs (14, 16, 18) secured to the lower side (34) of the base web and each extending substantially the full effective length of the base web, the longitudinal edge portions (50, 65) of each of the inner webs (14, 16, 18) which is aligned with the longitudinal edge (20) of the lower side (34) of the base web (12), extending the full length of the base web, the upper inner web (18) being free to receive personalised printed information, the inner webs having a transverse dimension less than half the transverse dimension of the base web, the adhesive including upper and lower transverse lines (46, 48) of adhesive adjacent and inside the lines of weakening (28) and a longitudinal marginal line (45) of adhesive adjacent and inside a longitudinal edge (20) of the upper side (32) so that when folded along the fold line (30) each envelope length is arranged to provide a sealed outgoing envelope, characterised in that the perforation lines include marginal lines of perforations (113, 115) extending substantially around three sides of each folded envelope length inside the transverse and longitudinal lines of adhesive, the longitudinal edge portion (68) of at least the uppermost (16, 18) of the inner webs being continuous adjacent the fold line (30) and the transverse marginal lines of perforation (115) extending through said continuous portion(s) of the inner webs, so that when the lines of perforation are broken around such a sealed envelope the envelope forming base sheet can be unfolded along the fold line. A multiple web business form stock according to claim 1 in which the base web is formed with sprocket drive holes (23, 24) along one or both longitudinal edges (20, 22), and in which each inner web (14, 16, 18) is secured by adhesive along one edge to the web beneath it with the lower of the inner webs being secured along one edge to the base web inside the sprocket holes. A business form stock according to claim 1 or claim 2 characterised in that each of the inner webs (16, 18) which does not form part of a return envelope is effectively attached to the base web (34) adjacent the longitudinal fold line (30). A business form stock according to any of claims 1 to 3 in which each of the inner webs is formed intermediate its longitudinal edges with die-cut slots (114) between each envelope length extending above and below each transverse line of weakening (28) and coinciding with said transverse lines of weakness (115) in the base web. A business form stock according to claim 4 in which the front side of each lower envelope sheet is provided with the transverse lines of adhesive (46, 48) adjacent the transverse lines of weakening (28), which adhesive is exposed by the die-cut slots. A business form stock according to claim 3 or any claim dependent thereon in which the whole of the inside surface of the upper envelope forming sheet (32), apart from a window area, is available for printing information to the addressee and the whole of both sides of each of the inner webs (14, 16) which does not form part of a return envelope apart from the area (70) containing the address and personalised information of the addressee, is available for preprinted information or for the insertion of information by the addressee, characterised in that each envelope length has a greater dimension parallel to its longitudinal fold line than the dimension between the fold line and either longitudinal edge, so that after opening a booklet is provided with the paper connected together along their left edges. A business form stock according to any of claims 1 to 6 in which there are at least two inner webs (14, 16) which extend for the majority of the width of the lower outer envelope sheet (34) of the base web characterised in that at least one of the inner webs extends to within 1 to 2 mm of the central longitudinal foldline (30). A business form stock according to any of claims 1 to 7 characterised in that the lower inner web (14) is adhered (60) to the lower side (34) of the base web to form a return envelope. A business form stock according to any of claims 1 to 8 characterised in that the inner webs (14, 16 18) are glued to each other and the base sheet so that after initial opening of an outgoing envelope the inner sheets are still attached to the base sheet/return envelope (34). A business form stock according to any of claims 1 to 9 in which each of the inner webs has a drive means (52, 66) along one edge coincident with the drive means (24) along the edge of the lower side (34) of the base web. Mailers formed from business stock according to any of claims 1 to 10.

Inventors: IRVINE HARRY, IRVINE, HARRY
Applicants: MOORE BUSINESS FORMS INC, MOORE BUSINESS FORMS, INC.
Application year: 1989
Main classification: B42D5
IPC codes: B65D27, B42D5, B31B27, B42D15