FR2593793A3 - STACKING OF SHEET MATERIAL - Google Patents

Abstract

The invention relates to a stack of sheet material assembled into a continuous strip and folded in an accordion fashion. To ensure the assembly of the last sheet 13 of a packet with the first sheet 12 of the following packet, this last sheet and this first sheet have, along a free edge, a zone 14 covered with a film-forming adhesive which can be softened and fluidized by the action of heat or other forms of energy. The invention applies in particular to data centers, in particular to those which are equipped with fast printers. (CF DRAWING IN BOPI)

Description

Emulation of material in sheets.

  The present invention relates to a stack of sheet material, in particular an assembly of forms or sheets joined in the form of a continuous band folded accordion (fan). It is known that in the treatment chains

  computers (computer centers, etc.), the importance of

  Primante, for example a fast printer of the so-called laser type, receives a stack of sheets or forms of the type envisaged in the invention. These chains require more and more a prior automatic connection of the last sheet of the stack feeding the printer

  with the first sheet of the stack that immediately follows

  to prevent delays that may

  significant effect, as downtime, on the production of

  the printer and, consequently, the entire chain.

  A joining apparatus is known in which the last sheet and the first sheet are brought closer together, the edges to be assembled being positioned carefully, after which the apparatus automatically applies a section of adhesive tape covering the junction line, while exercising at the same time a

  pressure on the areas touched by the adhesive tape.

  For this purpose, it has been proposed and described in an earlier patent of the Applicant sheet material stackings which are characterized in that a group of sheets at the bottom of a stack of sheets, thus comprising

  the last leaf is assembled in the lateral box.

  compared to the joining plane and next to the

effective leaf pounding.

  When the box is opened, this group of leaves falls to the side and is arranged parallel to the piling of the main leaves, which gives access to

  to the last sheet for the joining operation.

  The Applicant has recently designed and perfected a method and a joining apparatus in which the aforesaid adhesive tape is removed and the joining is performed

  by applying a continuous layer or film of adhesion

  film forming sif on the junction line between the edges

  adjacent to the two sheets to be assembled.

  The present invention relates to a package or em-

  pounding of sheet material facilitating the application of the

method described above.

  This object is achieved according to the invention with a stack of sheet material joined in a continuous band and folded accordionally, in which at least the last sheet and, preferably, a group of sheets

  are arranged laterally in relation to the main part of

  of the stack and are free to fall on a plane parallel to the main plane of location of the sheets in the stack, characterized in that at least the last sheet and at least the first sheet of the stack have along the free edge an area covered with a film-forming adhesive that can be softened and thinned

  under the effect of heat or some other form of energy.

  According to the preferred embodiment of the stacking

  according to the invention, a number of sheets of the order of

  about ten from both the first sheet and the last sheet have a marginal area covered with adhesive having the above characteristics. Other features and advantages of the invention

  will emerge more clearly from the detailed description

  which will follow with reference to the accompanying drawing in which the stack of the present invention is schematically shown with the unfolded head and tail sheets of the stack.

  As shown in the accompanying drawing, the stacking

  takes a pack of 10 sheets 11 assembled in a strip

continuous and folded accordion.

  In the stack, a first sheet 12 and a last sheet 13 are distinguished, these references referring to the unfolding direction of the continuous strip and, for example,

  following, removal of sheets from the stack.

  According to the invention, an adhesive-coated zone 14 is present on the edges of the first sheet 12 and on those of the sheets which immediately follow it, as well as those of the last sheet 13 and those which

immediately precede it.

  By using these two areas and by appropriately softening the adhesive, the apparatus applies a layer

  or a continuous film on the line of junction.

  The adhesive can be of the type that softens when heated and, in this case, it will be the same on all

zones 14.

  Alternatively, it can be activated by another

  source of energy, as in the case of

  photochemistry. Similarly, one can foresee a single

  encapsulated sif for which, at the junction, the micro-

  capsules are broken by appropriate means: or else, in the case of two-component adhesives (well known per se), we will cover the area 14 of the first

  sheet 12 of a preliminary layer of adhesive with the first

  first component and the area 14 of the last sheet 13 with a prelayer of the other component. As already mentioned, to achieve the junction, it is sufficient to provide the zones 14 previously coated with adhesive on the first sheet 12 and on the last

sheet 13, respectively.

  For security reasons and to avoid

  handling problems or accidental deterioration

  For example, it is preferable to pre-coat a certain number of leaves according to the first leaf and before the last leaf, as it was

represented on the drawing.

Claims (6)

  1. Stacking or bundle of sheet material together   in a continuous strip and folded accordionally, wherein at least the last sheet and, preferably, a group of the last sheets are arranged laterally with respect to the main portion of the stack and can   to fall freely on a plane parallel to the locational   of the sheets in the stack, characterized   in that at least the last sheet and at least the first   first leaf of the impilage present, along the free edge, an area covered with a film-forming adhesive which can to be softened or fluidized.   2. Stacking according to claim 1, characterized in that several sheets following the first sheet and   several sheets preceding the last sheet presented   tent said area covered with adhesive.   3. Stacking according to claim 2, characterized in   what said group of several sheets includes ten.   4. Stacking according to all the preceding claims   cedentes, characterized in that the adhesive can soften under the action of heat.   5. Stacking according to all of claims 1 to 3,   characterized in that the adhesive is enclosed in micro- capsules.   6. Stacking according to all of claims 1 to 3,   characterized in that the adhesive comprises two components, one of which is applied to said area of the first sheet and subsequent sheets, while the other is applied   said area of the last leaf and leaves cédentes.