GB2141070A

GB2141070A - Continuous blank form assembly

Info

Publication number: GB2141070A
Application number: GB08413846A
Authority: GB
Inventors: Umberto Luiz Farizatto
Original assignee: Interprint Formularios Ltda
Current assignee: Interprint Formularios Ltda
Priority date: 1983-06-07
Filing date: 1984-05-31
Publication date: 1984-12-12
Also published as: BR8302992A; GB8413846D0

Abstract

The assembly comprises a plurality of sheets including blank forms having transverse and longitudinal perforations, the latter being near the side margins where they define perforated strips 5. At least one of the said margins of the first or last copy presents an extension 6 of the edge. The width of the edge permits its folding over the margins 5 of the other copies where it is fixed by crimping and/or a seam of glue thereby interconnecting the first and last copies of the blank form assembly and, consequently, entrapping the internal copies thereof. <IMAGE>

Description

SPECIFICATION Improved continuous blank form assembly Continuous blank forms used in data processing have been used for presentation of information of many types. They are particularly useful for documents having several copies, for example, sales reports, which generally have a plurality of sheet or sets of forms with the same information on them. In these circumstances, the forms must have sides which maintain all copies in correct positions when they are used in high speed printers such as those utilizing traction feed.

Presently the lateral closing of continuous forms with several copies is made in two ways: by gluing or crimping the lateral edges of the blank form. These closures offer a multitude of printing machine feeding problems since the fixing of the blank form sheets by gluing causes stiffness which adversely effects feeding in printing machines having low traction. Proper print registration of all blank form copies is often prevented since the glue causes the formation of "spots" or ridges which occur at the fold which become permanent when the blank form is folded on itself. The glue may also cause ream disalignment of the alignment holes in a permanent manner and, therefore, make the printer's operation difficult.

The fixing of the blank form copies by crimping avoids the permanent "spots" in some forms but does not avoid their occurence when the blank form is bellows folded at the precise moment the displacement of the copies and ream disalignment of the holes of the blank form occurs, thus leading to failures in the printing process.

The above drawbacks are overcome with the present invention which comprises providing a side extension at at least one of the margins of the blank form of the first copy.

This is a longitudinal edge which includes alignment holes, thereby allowing the edge to be folded in an inside direction over and on the margin of the last blank form copy in such a way that the alignment holes of the various forms coincide in position. This allows the edge to be glued adequately. To further increase the fastening of the copies to one another there may also be applied optionally, a crimping process, since the edges thus formed assure the correct positioning of all copies of the blank form.

An object of the present invention is to eliminate feeding problems of low or high speed printing machines. The attachment of the first to the last copy of the blank form set avoids any displacement of the sheets with respect to one another as they are fed into the computer. The release of the crimped copies of the blank forms occurs at the first and the last copy of the set as a result of the contact or pressure exerted in the printing machine.

The blank forms of the present invention present functional characteristics which are superior to those of glued blank forms, since it eliminates completely the inconvient "spot" formation at the folding areas, a condition which also occurs with conventional crimped blank forms where displacement of copies and holes disalignment of the blank form occurs when folding takes place. Therefore, the main objective of this patent is to eliminate totally the formation of "spots" at the folding areas of the blank form, and permit all copies to remain in perfect alignment at the moment the blank form is folded or during its feeding into the computer. The copies of the blank form are maintained more completely secured than in a conventional crimped system, without presenting the stiffness and the inconveniences of a glued blank form.

After the process, the blank forms set according to the invention can be easily separated, either manually by detaching the fold at the margin which links the first to the last copy, or using a copy severing machine which trims the left margin of the blank form. The invention may be used in printers of small and micro-computers, since it assures feeding without any problem for these printers which generally lack facility for traction of the blank form. The invention also assures a better printing registration in all copies of the set, since there is no displacement in the alignment of the perforations.

The invention will now be further described by way of example with reference to the attached drawings, in which: Figure 1 shows an exploded perspective view of a continuous blank form, illustrating several copy individually; Figure 2 is a perspective view in which the copies of the blank form are overlapped and in which the bottom form presents a complementary edge to be folded over the margin of the first copy of the blank form; and Figure 3 is another perspective view, in which said edge is glued, thereby fixing all copies of the blank form.

The present invention pertains to a continuous blank form of the type generally shown in Fig. 1, by which may be appreciated that it is comprised of a plurality of sheets (1), and blank forms (2) having transverse (3) and longitudinal (4) perforations, the latter very near the side margins where they define perforated strips (5) so that the set may be pulled through the printing machine; the holes assist feeding the forms to a printer. The perforations allow the release of each blank form (2).

The sheet may be folded at perforation 3, which also permits the convenient separation of sheets from one another.

The blank form is characterized in that at least one of the side margins of the first or last copy (1) presents an extension in form of an edge (6) disposed near a perforated longitudinal line (7), the width of said edge (6) being shaped so that it may be folded over the margins of the other copies (1) (see Fig. 2 and 3) where it is fixed to strip (5) by a seam of glue between edge (6) and strip (5) interconnecting the first and last copy (1) of the blank form (2) and, consequently, entrapping the internal copies (1) and thereby assuring the correct positioning of all copies.

The entrapping of the blank form copies can also be made by crimping the edge (6) and strip (5) together instead of glue, or by use of both gluing and crimping.

Claims

1. A continuous blank form assembly comprising a plurality of sheets of blank forms having side margins and transverse and longitudinal perforations, said longitudinal perforations being near said side margins where they define strips which perforations allow the release of each blank form, wherein at least one of said side margins of the first or last copy includes an extension in the form of an edge the width of said edge being selected so that it may be folded over the margins of said other copies, and said extension is fixed by crimping and/or by a seam of glue between said extension and strip interconnecting the first and the last copy of the blank form and, consequently, entrapping the internal copies.

2. A continuous blank form assembly according to claim 1 wherein said blank form copies are fixed to one another by crimping.

3. A continuous blank form assembly according to claim 1 wherein said blank form copies are fixed to one another by glue and crimped edges.

4. A continuous blank form assembly according to any of claims 1 to 3 wherein said extension is defined by a longitudinal perforation substantially parallel to said edge.

5. A continuous blank form assembly substantially as described with reference to the drawings.